Patent Publication Number: US-11657993-B2

Title: Solid state circuit breaker button interlocking system

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation application of and claims priority to U.S. patent application Ser. No. 16/914,841, filed Jun. 29, 2020, which claims priority to U.S. Provisional Patent Application Ser. No. 62/870,084, filed Jul. 3, 2019, the disclosures of which are incorporated herein by reference. 
    
    
     BACKGROUND OF THE INVENTION 
     Field of the Invention 
     The disclosed and claimed concept relates to a circuit breaker and, more specifically, to a circuit breaker operating mechanism including a multi-level feedback actuator assembly with an interlock system. 
     Background Information 
     Circuit breakers are used to protect electrical circuitry from damage due to an over-current condition, such as an overload condition or a relatively high level short circuit or fault condition. That is, a circuit breaker is typically disposed between a line, i.e., a source of electricity, and a load, i.e., a device or construct that uses electricity. Mechanical circuit breakers typically include a number of pairs of separable contacts, an operating mechanism, and a trip unit. Each pair of separable contacts is coupled to, and in electrical communication with, either the line or the load. The separable contacts, typically, include a movable contact and a fixed/stationary contact. It is understood that a circuit breaker includes one or more pairs of separable contacts. Hereinafter, however, a single pair of separable contacts is discussed. 
     The movable contact moves between an open, first position and a closed, second position. When the movable contact is in the first position, the separable contacts are not in electrical communication and no current passes through the circuit breaker. When the movable contact is in the second position, the separable contacts are in electrical communication and current passes through the circuit breaker. The separable contacts may be operated either manually by way of an actuator disposed on the outside of the housing assembly or automatically in response to an over-current condition. That is, the trip unit is structured to detect over-current conditions. When an over-current condition is detected, the trip unit actuates the operating mechanism thereby rapidly moving the movable contacts to an open configuration. The operating mechanism is further structured to move the movable contacts from the open, first position to the closed, second position and thereafter maintain the contacts in the closed, second position. One problem with mechanical circuit breakers is that the separation of the separable contacts, i.e., interruption of the current, is slower than is often desirable. 
     Solid state circuit breakers interrupt a current at a greater speed. Solid state circuit breakers utilize solid state components to interrupt the current and separable contacts for galvanic isolation. That is, the solid state components interrupt the current and the separable contacts separate to prevent any trace currents or (electrical) leakage that the solid state components fail to interrupt. A solid state circuit breaker includes, but is not limited to, a solid state switching circuit having solid state switching elements (e.g., without limitation, insulated-gate bipolar transistors (IGBTs)) that are structured to switch between on and off configurations (i.e., close and open configurations), a trip unit circuit, and an electric actuator assembly for the separable contacts. Upon the trip unit circuit detecting an impending fault or exceedingly high and unacceptable overvoltage condition in the circuit breaker, the trip unit circuit generates a signal that quickly switches the solid state switching elements to the off/open configuration. Thus, the trip unit circuit functions as an operating mechanism for the solid state switching elements. Hereinafter, the term “trip unit circuit” will be used for this component so as to distinguish it from the “operating mechanism” that is associated with the separable contacts. Meanwhile, the electric actuator assembly generates a disconnect command for the separable contacts, thereby moving the separable contacts to the open, first position. Together, the switched “off” solid-state device and open separable contacts protect the load and associated load circuit from being damaged and electrically and physically isolate the source of the fault or overload condition from the remainder of the electrical power distribution system. 
     Further, some solid state circuit breakers include an indicator, sometimes identified as a “flag,” that is mechanically linked to the separable contacts. That is, the flag has a visual representation, e.g., a red portion and a green portion, or, the words “open” and “closed.” The flag appears in a window in the circuit breaker housing. Thus, for example, when the separable contacts are in the first position, the flag displays the word “open.” As the flag is mechanically linked to the separable contacts, and barring a breakdown in the mechanical linkage, the flag always displays the state of the contacts. The flag does not, however, display whether the solid state switching elements have “closed.” Thus, some solid state circuit breakers also include an indicator such as, but not limited to, a light that is coupled to the solid state switching elements. That is, for example, when the solid state switching elements are in the on/closed configuration, the indicator light is illuminated. 
     One advantage of employing the solid-state device is that impending faults can be reacted to in a matter of microseconds. That is, the solid-state device interrupts the current prior to the contacts separating. Thus, when the separable contacts move to the first position after the solid-state device is in the off/open configuration, the chance of an arc forming between the separable contacts is minimized. 
     Closing the solid state circuit breaker is accomplished by the trip unit circuit which, as noted above, acts as an operating mechanism for the solid state switching elements. That is, closing the solid state circuit breaker requires energy, typically energy drawn from the line. That is, the trip unit circuit and/or the solid state switching elements need power to switch between the on and off configurations. The power is, typically drawn from the line. To draw power from the line, however, requires a current to pass through the solid state circuit breaker. That is, the movable contact has to be in the second position, i.e., the separable contacts need to be closed, and there must be power in the line. For the movable contact to move to the second position, the operating mechanism must be powered. 
     For example, one type of operating mechanism for solid state circuit breaker separable contacts utilizes a rotary solenoid(s) to move the movable contacts between the first and second positions. While two rotary solenoids may be used (a first rotary solenoid to move the movable contacts from the first position to the second position, and, a second rotary solenoid to move the movable contacts from the second position to the first position), in an exemplary embodiment a single rotary solenoid is bi-directional and moves the movable contacts between the first and second positions. 
     In an exemplary embodiment, the bi-directional rotary solenoid is actuated by an electric actuator assembly. That is, the electric actuator assembly includes an external actuator, e.g., a button, and a switch assembly that holds a charge, e.g., a switch assembly with a capacitor or that is in electrical communication with the capacitors noted above. When the external actuator is actuated by a user, the switch assembly releases the charge which actuates the bi-directional rotary solenoid causing the operating mechanism to move the movable contact between the first and second positions. Typically, the degree by which the actuator/button needs to be pushed so as to actuate the operating mechanism is slight, i.e., a small motion that requires little force. 
     Further, because the bi-directional rotary solenoid is not separating contacts with energy passing therethrough, the bi-directional rotary solenoid, typically, operates at a slower speed than a bi-directional rotary solenoid separating contacts with energy passing therethrough. Generally, a slower moving rotary solenoid operates more quietly than a faster rotary solenoid. Moreover, the moving elements of the rotary solenoid are disposed within a rotary solenoid housing which, in turn, is disposed within the circuit breaker housing. Thus, the operation of the rotary solenoid is difficult for a user to detect. 
     With the solid state circuit breaker in this configuration, there are different scenarios that could occur following an overcurrent event. For example: 
     1) There is no power on the line side of the solid state circuit breaker, there is no charge in the switch assembly capacitors and the flag indicates that the movable contact is in the first position open, i.e., the separable contacts are open. A user looking at the solid state circuit breaker does not know the line side power is off or that the capacitors have no power, they only know that the separable contacts are open. If the user assumes that the line is energized, they attempt to close the separable contacts and they push the button a short distance with a light force to hit the switch and nothing happens. That is, without energy from the switch assembly capacitors, there is no energy to cause the operating mechanism to move the movable contact to the second position. In this situation, the flag does not indicate that the separable contacts are closed. Further, if the separable contacts are not closed, the trip unit circuit cannot change the solid state switching elements to the on/closed configuration. 
     2) There is power on the line side of the solid state circuit breaker but no charge in/to the capacitors and the flag states the breaker is open. A user looks at the breaker and does not know the line side power is on or that the capacitors have no power, they only know that the separable contacts are open. They attempt to close the breaker and the push the actuator/button a short distance with a light force and nothing happens. Again, the flag does not indicate that the separable contacts are closed. 
     3) The line side of the solid state circuit breaker has no power but the capacitors still have a charge. The user presses the close button a short distance and with light force; this causes the capacitors to actuate the solenoid and the separable contacts close. There is, however, no power from the line to allow the trip unit to switch the configuration of the solid state switching elements from the off/open configuration to the on/closed configuration. The flag (which is mechanically coupled to the separable contacts) indicates the solid state circuit breaker is closed but, the trip unit circuit cannot change the solid state switching elements to the on/closed configuration as there is no power from the line. 
     4) There is power to the line side of the solid state circuit breaker and the capacitors are charged. The user presses the close button a short distance and with light force. This causes the capacitors to actuate the solenoid and the separable contacts close, the trip unit powers up and the semiconductors connect line to load power. This is the expected operation of the solid state circuit breaker. 
     There are several problems associated with an operating mechanism with a bi-directional rotary solenoid as described above. First, as noted, the switch assembly capacitors may not have a charge when the user presses the external actuator. Without a switch assembly capacitor charge, the bi-directional rotary solenoid cannot be actuated electronically. Further, the external actuator, which is the interface between the user and the operating mechanism, does not provide feedback to the user indicating the status of the switch assembly and/or the bi-directional rotary solenoid. That is, when the user actuates the external actuator there is no feedback that indicates that the switch assembly and/or the bi-directional rotary solenoid have operated as described above. This is a problem. 
     Further, in some embodiments the operating mechanism includes a manual actuator assembly in addition to the electric switch assembly. The actuator/switch assemblies utilize the same external actuator (button). The external actuator, however, does not provide feedback that indicates to the user whether the electric actuator assembly has been actuated and/or that the manual actuator assembly needs to be actuated. That is, as noted above, the operation of the rotary solenoid is muffled by multiple housings. Thus, in a situation wherein the switch assembly does not have a charge, a user may actuate an external actuator and believe that the electric actuator assembly has operated. Such a user would not attempt to utilize the manual actuator assembly. Alternatively, in a situation wherein the switch assembly has a charge, a user may actuate an external actuator and believe that the electric actuator assembly has not operated. Thus, the user would attempt to utilize the manual actuator assembly after the movable contacts have already moved between the first and second positions. This is a problem. 
     Further, some circuit breaker assemblies include an under voltage regulation assembly structured to move the movable contacts from the second position to the first position when the voltage dropped below a selected limit. The under voltage regulation assembly was a separate assembly, i.e., the under voltage regulation assembly was not part of the operating mechanism. Thus, adding an under voltage regulation assembly increased the cost of a circuit breaker. This is a problem. 
     Further, users are known to prefer symmetry regarding characteristics of a circuit breaker and/or an operating mechanism. That is, for example, if a circuit breaker/operating mechanism includes two separate user interfaces, e.g., buttons, a user expects/prefers that the tactile feedback from the buttons is generally similar. That is, if one button is easy to press and the other button is hard to press, a user will assume that one of the buttons in not operating properly. Thus, actuator assemblies that perform similar, or complimentary, actions are expected to provide a similar tactile feedback. For example, the actuator assemblies that open and close the contacts of a circuit breaker assembly are expected to provide a similar tactile feedback. If such actuator assemblies provide a different tactile feedback, it is a problem. 
     There is, therefore a need for a multi-level feedback actuator assembly for a circuit breaker assembly that is structured to provide noticeably different feedback to a user wherein the noticeably different feedback informs the user if the operating mechanism is, or has, moved the movable contacts from the first position to the second position utilizing an electric actuator assembly, or, that the electric actuator assembly has failed to move the movable contacts from the first position to the second position and that the user must utilize a manual actuator assembly to move the movable contacts from the first position to the second position. There is a further need for the multi-level feedback actuator assembly to provide an indication to the user that the movable contacts have moved from the first position to the second position. There is a further need for an under voltage regulation assembly that is incorporated into the operating mechanism. There is a further need for a multi-level feedback actuator assembly that provides generally the same tactile feedback for both the open actuator and close actuator. 
     The multi-level feedback actuator assembly for a circuit breaker assembly described below solves the problems stated above. The multi-level feedback actuator assembly for a circuit breaker assembly, however, may be exposed to excessive wear and tear, or may be otherwise damaged, if the elements thereof are not maintained in a safe configuration. This is a problem. There is, therefore, a need for an interlock system for the multi-level feedback actuator assembly that is structured to maintain the multi-level feedback actuator assembly, and elements thereof, in a safe configuration. 
     SUMMARY OF THE INVENTION 
     These needs, and others, are met by at least one embodiment of this invention which provides a multi-level feedback actuator assembly for a circuit breaker assembly including a rotary solenoid including a rotating output shaft, an electric actuator assembly and a manual actuator assembly. The electric actuator assembly includes a switch assembly with an actuator. The switch assembly is operatively coupled to said rotary solenoid and is structured to actuate said rotary solenoid. The manual actuator assembly includes a number of primary actuators, a linkage assembly, and a cam assembly. The number of primary actuators includes a first actuator with a body. The first actuator body is structured to move over a path having at least a first portion and a second portion. The rotary solenoid is operatively coupled to the linkage assembly. The linkage assembly is operatively coupled to the rotary solenoid and to the first actuator body. The linkage assembly is further structured to be operatively coupled to an operating mechanism crossbar. In this configuration, the linkage assembly is structured to apply at least a first bias and a second bias to the first actuator body. Further, the first bias is noticeably different from said second bias. Thus, the linkage assembly is structured to apply said first bias to said first actuator body when said first actuator body is disposed in said first actuator body path first portion, and, to apply said second bias to said first actuator body when said first actuator body is disposed in said first actuator body path second portion. 
     It is understood that the first actuator is structured to, and does, actuate the electric actuator assembly as it moves over the first actuator body path first portion and the manual actuator assembly as it moves over the first actuator body path second portion. Further, as the bias applied to the first actuator body, i.e., the feedback bias felt by the user, is noticeably different as the first actuator body moves between the first actuator body path first portion and the first actuator body path second portion, the user is informed as to which actuator assembly is being utilized. 
     That is, when a user actuates the first actuator, the bias applied to the first actuator is further transferred/transmitted to the user. That is, the user feels the bias on the first actuator body. In an exemplary embodiment, the user has been informed, e.g., in a user manual, that the noticeably different biases indicate that different actuating assemblies are being actuated. For example, the user is informed that a light bias indicates that the electric actuator assembly is being actuated whereas a stronger bias indicates that the manual actuator assembly is being actuated. Thus, as the user initially actuates the first actuator, the first actuator moves over the first actuator body path first portion and the first bias is transferred/transmitted to the user via the first actuator. During this motion, the user feels a light bias and is informed via this tactile feedback that the first actuator is actuating the electric actuator assembly. If the electric actuator assembly in non-operative, the user does not receive an indication that the movable contact has moved between positions. For example, the flag does not change positions. Thus, the user is informed that further action is required to change the position of the movable contact. Accordingly, the user continues to press on the first actuator causing the first actuator to move into, and over, the first actuator body path second portion. As the first actuator moves into, and over, the first actuator body path second portion, the second bias is applied to the first actuator and this stronger bias is felt by the user. Thus, the user is informed that the first actuator actuating the manual actuator assembly. 
     Further, the elements of the multi-level feedback actuator assembly, which is part of the operating mechanism, are also structured to be an under voltage regulation assembly. A multi-level feedback actuator assembly in such a configuration, as described in detail below, solves the problems stated above. 
     Further, the interlock system for the multi-level feedback actuator assembly is structured to maintain the multi-level feedback actuator assembly, and elements thereof, in a safe configuration. This solves the problems noted above. The interlock system for the multi-level feedback actuator assembly includes an interlock assembly structured to configure the rotary solenoid and at least one of the first actuator or the second actuator in a safe configuration. 
     Accordingly, an aspect of the disclosed and claimed concept is to provide an improved interlock system for a circuit breaker assembly, said circuit breaker assembly structured to have a use current selectively passed therethrough, said circuit breaker assembly including a housing assembly, a separable contact assembly, a trip assembly and an operating mechanism, said housing assembly defining a substantially enclosed space, said separable contact assembly including a number of fixed contacts and a number of movable contacts, each said movable contact movable between an open, first position, wherein each said movable contact is spaced from, and is not in electrical communication with, an associated fixed contact, and, a second position, wherein each said movable contact is coupled to, and is in electrical communication with, the associated fixed contact, said trip assembly structured to detect an overcurrent condition and to provide an overcurrent signal when an overcurrent condition is detected, said operating mechanism structured to move said number of movable contacts between said first and second positions, said operating mechanism including an elongated crossbar, said operating mechanism crossbar rotatably coupled to said housing assembly, said operating mechanism crossbar structured to move between a first position and a second position corresponding to said movable contacts first position and said movable contacts second position. Said interlock system can be generally stated as including a rotary solenoid including a rotating output shaft, said rotary solenoid output shaft structured to move between a first position and a second position, an actuator assembly including a primary first actuator, a primary second actuator and a linkage assembly, said primary first actuator including a first actuator, said first actuator including a body, said primary second actuator including a second actuator, said second actuator including a body, said rotary solenoid operatively coupled to said linkage assembly, said linkage assembly operatively coupled to each of said rotary solenoid, said first actuator body and said second actuator body, and an interlock assembly structured to configure said rotary solenoid and at least one of said first actuator or said second actuator in a safe configuration 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       A full understanding of the invention can be gained from the following description of the preferred embodiments when read in conjunction with the accompanying drawings in which: 
         FIG.  1    is a partially schematic, partial cross-sectional side view of a circuit breaker assembly. 
         FIG.  2    is an isometric view of a multi-level feedback actuator assembly. 
         FIG.  3    is another isometric view of a multi-level feedback actuator assembly. 
         FIGS.  4 A and  4 B  are an exploded isometric view of a multi-level feedback actuator assembly.  FIGS.  4 A and  4 B  are the same and are provided for clarity with respect to the reference numbers. 
         FIG.  5    is side view of a switch assembly. 
         FIGS.  6 - 10    are partial sides views of a multi-level feedback closing actuator assembly with a limited number of elements identified.  FIGS.  6 - 10    sequentially show the positions of the identified elements, as well as a line of force, as the multi-level feedback closing actuator assembly is actuated. 
         FIG.  11    is an illustration demonstrating the defined terms “first side” and “second side” of an axis of rotation and the “location” of a line of force relative to the axis of rotation. 
         FIGS.  12 - 14    are partial sides views of a multi-level feedback opening actuator assembly with a limited number of elements identified.  FIGS.  12 - 14    sequentially show the positions of the identified elements, as well as a line of force, as the multi-level feedback opening actuator assembly is actuated. 
         FIGS.  15  and  16    are exploded views of a multi-level feedback opening actuator assembly including an interlock system. 
         FIG.  17    is a partial cross-sectional view of a multi-level feedback opening actuator assembly including an interlock system with elements of the interlock system in a first position. 
         FIG.  18    is a partial cross-sectional view of a multi-level feedback opening actuator assembly including an interlock system with elements of the interlock system in a second position. 
         FIG.  19    is a partial cross-sectional view of the multi-level feedback opening actuator assembly with elements of the interlock system in another first position. 
         FIG.  20    is a partial cross-sectional view of the multi-level feedback opening actuator assembly with elements of the interlock system in another second position. 
         FIG.  21    is a view similar to  FIG.  20    and additionally showing a set of contacts in an open state. 
         FIGS.  22 A and  22 B  are partial cross-sectional views of different portions of the multi-level feedback opening actuator assembly with elements of the interlock system in a further second position. 
     
    
    
     Similar numerals refer to similar parts throughout the Specification. 
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     It will be appreciated that the specific elements illustrated in the figures herein and described in the following specification are simply exemplary embodiments of the disclosed concept, which are provided as non-limiting examples solely for the purpose of illustration. Therefore, specific dimensions, orientations, assembly, number of components used, embodiment configurations and other physical characteristics related to the embodiments disclosed herein are not to be considered limiting on the scope of the disclosed concept. 
     Directional phrases used herein, such as, for example, clockwise, counterclockwise, left, right, top, bottom, upwards, downwards and derivatives thereof, relate to the orientation of the elements shown in the drawings and are not limiting upon the claims unless expressly recited therein. 
     As used herein, the singular form of “a,” “an,” and “the” include plural references unless the context clearly dictates otherwise. 
     As used herein, “structured to [verb]” means that the identified element or assembly has a structure that is shaped, sized, disposed, coupled and/or configured to perform the identified verb. For example, a member that is “structured to move” is movably coupled to another element and includes elements that cause the member to move or the member is otherwise configured to move in response to other elements or assemblies. As such, as used herein, “structured to [verb]” recites structure and not function. Further, as used herein, “structured to [verb]” means that the identified element or assembly is intended to, and is designed to, perform the identified verb. Thus, an element that is merely capable of performing the identified verb but which is not intended to, and is not designed to, perform the identified verb is not “structured to [verb].” 
     As used herein, “associated” means that the elements are part of the same assembly and/or operate together, or, act upon/with each other in some manner. For example, an automobile has four tires and four hubcaps. While all the elements are coupled as part of the automobile, it is understood that each hubcap is “associated” with a specific tire. 
     As used herein, a “coupling assembly” includes two or more couplings or coupling components. The components of a coupling or coupling assembly are generally not part of the same element or other component. As such, the components of a “coupling assembly” may not be described at the same time in the following description. 
     As used herein, a “coupling” or “coupling component(s)” is one or more component(s) of a coupling assembly. That is, a coupling assembly includes at least two components that are structured to be coupled together. It is understood that the components of a coupling assembly are compatible with each other. For example, in a coupling assembly, if one coupling component is a snap socket, the other coupling component is a snap plug, or, if one coupling component is a bolt, then the other coupling component is a nut or threaded bore. 
     As used herein, a “rotational coupling” means a coupling that rotatably coupled two or more elements. A “rotational coupling” includes, but is not limited to, openings (or similar constructs) in elements through which a pin, axle, or similar construct is, or can be, inserted. That is, a “rotational coupling” includes an opening on different elements, i.e., at least two openings or similar constructs, as well as a pin, axle, or similar construct, or, an opening on one element and a pin, axle, or similar construct on another element. Thus, as used herein, an “opening” that is described as a “rotational coupling” is also properly identified as a “coupling” or “rotational coupling.” Further, in an instance wherein the following description fails to mention or identify a pin, axle or similar construct that is associated with a “rotational coupling,” it is understood that such a pin, axle or similar construct exists and that such a pin, axle or similar construct extends through the openings identified as a “rotational coupling.” Further, as used herein, all elements that are described as being “rotatably coupled” have a “rotational coupling” as defined herein. 
     As used herein, a “fastener” is a separate component structured to couple two or more elements. Thus, for example, a bolt is a “fastener” but a tongue-and-groove coupling is not a “fastener.” That is, the tongue-and-groove elements are part of the elements being coupled and are not a separate component. 
     As used herein, the statement that two or more parts or components are “coupled” shall mean that the parts are joined or operate together either directly or indirectly, i.e., through one or more intermediate parts or components, so long as a link occurs. As used herein, “directly coupled” means that two elements are directly in contact with each other. As used herein, “fixedly coupled” or “fixed” means that two components are coupled so as to move as one while maintaining a constant orientation relative to each other. Accordingly, when two elements are coupled, all portions of those elements are coupled. A description, however, of a specific portion of a first element being coupled to a second element, e.g., an axle first end being coupled to a first wheel, means that the specific portion of the first element is disposed closer to the second element than the other portions thereof. Further, an object resting on another object held in place only by gravity is not “coupled” to the lower object unless the upper object is otherwise maintained substantially in place. That is, for example, a book on a table is not coupled thereto, but a book glued to a table is coupled thereto. 
     As used herein, the phrase “removably coupled” or “temporarily coupled” means that one component is coupled with another component in an essentially temporary manner. That is, the two components are coupled in such a way that the joining or separation of the components is easy and would not damage the components. For example, two components secured to each other with a limited number of readily accessible fasteners, i.e., fasteners that are not difficult to access, are “removably coupled” whereas two components that are welded together or joined by difficult to access fasteners are not “removably coupled.” A “difficult to access fastener” is one that requires the removal of one or more other components prior to accessing the fastener wherein the “other component” is not an access device such as, but not limited to, a door. 
     As used herein, “operatively coupled” means that a number of elements or assemblies, each of which is movable between a first position and a second position, or a first configuration and a second configuration, are coupled so that as the first element moves from one position/configuration to the other, the second element moves between positions/configurations as well. It is noted that a first element may be “operatively coupled” to another without the opposite being true. With regard to electronic devices, a first electronic device is “operatively coupled” to a second electronic device when the first electronic device is structured to, and does, send a signal or current to the second electronic device causing the second electronic device to actuate or otherwise become powered or active. 
     As used herein, “temporarily disposed” means that a first element(s) or assembly (ies) is resting on a second element(s) or assembly(ies) in a manner that allows the first element/assembly to be moved without having to decouple or otherwise manipulate the first element. For example, a book simply resting on a table, i.e., the book is not glued or fastened to the table, is “temporarily disposed” on the table. 
     As used herein, the statement that two or more parts or components “engage” one another means that the elements exert a force or bias against one another either directly or through one or more intermediate elements or components. Further, as used herein with regard to moving parts, a moving part may “engage” another element during the motion from one position to another and/or may “engage” another element once in the described position. Thus, it is understood that the statements, “when element A moves to element A first position, element A engages element B,” and “when element A is in element A first position, element A engages element B” are equivalent statements and mean that element A either engages element B while moving to element A first position and/or element A engages element B while in element A first position. 
     As used herein, “operatively engage” means “engage and move.” That is, “operatively engage” when used in relation to a first component that is structured to move a movable or rotatable second component means that the first component applies a force sufficient to cause the second component to move. For example, a screwdriver may be placed into contact with a screw. When no force is applied to the screwdriver, the screwdriver is merely “temporarily coupled” to the screw. If an axial force is applied to the screwdriver, the screwdriver is pressed against the screw and “engages” the screw. However, when a rotational force is applied to the screwdriver, the screwdriver “operatively engages” the screw and causes the screw to rotate. Further, with electronic components, “operatively engage” means that one component controls, e.g., actuates, another component by a control signal or current. 
     As used herein, in the phrase “[x] moves between its first position and second position,” or, “[y] is structured to move [x] between its first position and second position,” “[x]” is the name of an element or assembly. Further, when [x] is an element or assembly that moves between a number of positions, the pronoun “its” means “[x],” i.e., the named element or assembly that precedes the pronoun “its.” 
     As used herein, “correspond” indicates that two structural components are sized and shaped to be similar to each other and may be coupled with a minimum amount of friction. Thus, an opening which “corresponds” to a member is sized slightly larger than the member so that the member may pass through the opening with a minimum amount of friction. This definition is modified if the two components are to fit “snugly” together. In that situation, the difference between the size of the components is even smaller whereby the amount of friction increases. If the element defining the opening and/or the component inserted into the opening are made from a deformable or compressible material, the opening may even be slightly smaller than the component being inserted into the opening. With regard to surfaces, shapes, and lines, two, or more, “corresponding” surfaces, shapes, or lines have generally the same size, shape, and contours. With regard to elements/assemblies that are movable or configurable, “corresponding” means that when elements/assemblies are related and that as one element/assembly is moved/reconfigured, then the other element/assembly is also moved/reconfigured in a predetermined manner. For example, a lever including a central fulcrum and elongated board, i.e., a “see-saw” or “teeter-totter,” the board has a first end and a second end. When the board first end is in a raised position, the board second end is in a lowered position. When the board first end is moved to a lowered position, the board second end moves to a “corresponding” raised position. Alternately, a cam shaft in an engine has a first lobe operatively coupled to a first piston. When the first lobe moves to its upward position, the first piston moves to a “corresponding” upper position, and, when the first lobe moves to a lower position, the first piston, moves to a “corresponding” lower position. 
     As used herein, a “path of travel” or “path,” when used in association with an element that moves, includes the space an element moves through when in motion. As such, and as used herein, any element that moves inherently has a “path of travel” or “path.” Further, a “path of travel” or “path” relates to a motion of one identifiable construct as a whole relative to another object. For example, assuming a perfectly smooth road, a rotating wheel (an identifiable construct) on an automobile generally does not move relative to the body (another object) of the automobile. That is, the wheel, as a whole, does not change its position relative to, for example, the adjacent fender. Thus, a rotating wheel does not have a “path of travel” or “path” relative to the body of the automobile. Conversely, the air inlet valve on that wheel (an identifiable construct) does have a “path of travel” or “path” relative to the body of the automobile. That is, while the wheel rotates and is in motion, the air inlet valve, as a whole, moves relative to the body of the automobile. 
     As used herein, a “planar body” or “planar member” is a generally thin element including opposed, wide, generally parallel surfaces, i.e., the planar surfaces of the planar member, as well as a thinner edge surface extending between the wide parallel surfaces. That is, as used herein, it is inherent that a “planar” element has two opposed planar surfaces with an edge surface extending therebetween. The perimeter, and therefore the edge surface, may include generally straight portions, e.g., as on a rectangular planar member such as on a credit card, or be curved, as on a disk such as on a coin, or have any other shape. 
     As used herein, the word “unitary” means a component that is created as a single piece or unit. That is, a component that includes pieces that are created separately and then coupled together as a unit is not a “unitary” component or body. 
     As used herein, “unified” means that all the elements of an assembly are disposed in a single location and/or within a single housing, frame or similar construct. 
     As used herein, the term “number” shall mean one or an integer greater than one (i.e., a plurality). That is, for example, the phrase “a number of elements” means one element or a plurality of elements. It is specifically noted that the term “a ‘number’ of [X]” includes a single [X]. 
     As used herein, a “radial side/surface” for a circular or cylindrical body is a side/surface that extends about, or encircles, the center thereof or a height line passing through the center thereof. As used herein, an “axial side/surface” for a circular or cylindrical body is a side that extends in a plane extending generally perpendicular to a height line passing through the center. That is, generally, for a cylindrical soup can, the “radial side/surface” is the generally circular sidewall and the “axial side(s)/surface(s)” are the top and bottom of the soup can. Further, as used herein, “radially extending” means extending in a radial direction or along a radial line. That is, for example, a “radially extending” line extends from the center of the circle or cylinder toward the radial side/surface. Further, as used herein, “axially extending” means extending in the axial direction or along an axial line. That is, for example, an “axially extending” line extends from the bottom of a cylinder toward the top of the cylinder and substantially parallel to, or along, a central longitudinal axis of the cylinder. 
     As used herein, “generally curvilinear” includes elements having multiple curved portions, combinations of curved portions and planar portions, and a plurality of linear/planar portions or segments disposed at angles relative to each other thereby forming a curve. 
     As used herein, an “elongated” element inherently includes a longitudinal axis and/or longitudinal line extending in the direction of the elongation. 
     As used herein, “about” in a phrase such as “disposed about [an element, point or axis]” or “extend about [an element, point or axis]” or “[X] degrees about an [an element, point or axis],” means encircle, extend around, or measured around. When used in reference to a measurement or in a similar manner, “about” means “approximately,” i.e., in an approximate range relevant to the measurement as would be understood by one of ordinary skill in the art. 
     As used herein, “generally” means “in a general manner” relevant to the term being modified as would be understood by one of ordinary skill in the art. 
     As used herein, “substantially” means “by a large amount or degree” relevant to the term being modified as would be understood by one of ordinary skill in the art. 
     As used herein, “at” means on and/or near relevant to the term being modified as would be understood by one of ordinary skill in the art. 
     As used herein, “in electronic communication” is used in reference to communicating a signal via an electromagnetic wave or signal. “In electronic communication” includes both hardline and wireless forms of communication; thus, for example, a “data transfer” or “communication method” via a component “in electronic communication” with another component means that data is transferred from one computer to another computer (or from one processing assembly to another processing assembly) by physical connections such as USB, Ethernet connections or remotely such as NFC, blue tooth, etc. and should not be limited to any specific device. 
     As used herein, “in electric communication” means that a current passes, or can pass, between the identified elements. Being “in electric communication” is further dependent upon an element&#39;s position or configuration. For example, in a circuit breaker, a movable contact is “in electric communication” with the fixed contact when the contacts are in a closed position. The same movable contact is not “in electric communication” with the fixed contact when the contacts are in the open position. 
     As used herein, “noticeably different,” when used in relation to comparing two or more biases (including counter/feedback forces), means that the bias is detectable to a human. That is, a “noticeably different” bias relative to biases less than 1.0 lbf, or wherein one of the biases is less than 1.0 lbf, means that the difference between the biases is more than 25%. Further, a “noticeably different” bias relative to biases wherein both biases are greater than 1.0 lbf means that the difference between the biases is at least 1.0 lbf. 
     As used herein, a “noticeable feedback” when used in relation to a solenoid means that the solenoid is structured to generate a sound and/or a vibration that is detectable by a human. That is, certain solenoids are structured to reduce sound and/or a vibration and do not generates a “noticeable feedback” as used herein. For example, a solenoid that includes a dampener and/or a muffler such as, but not limited to, a housing that is disposed within another housing does not generate a “noticeable feedback” as used herein. In addition to other configurations not specifically identified, a solenoid that includes stop pins external to the housing and which are impacted by elements moved by the solenoid are structured to, and do, provide “noticeable feedback” as used herein. 
     As used herein, a “use current” is the current that a circuit breaker assembly is structured to pass therethrough when the circuit breaker assembly contacts are in the closed position. 
     As used herein, and when used in association with a solenoid that draws a current from the use current passing through a circuit breaker, a “proportional current” means that the current drawn by the solenoid is a fixed proportion of the use current. For example, a current drawn by the solenoid which fluctuates with the use current, but which is always a set percentage of the use current, is a “proportional current.” 
     As used herein, a “multi-level feedback” actuator means an actuator that moves over a path and that is structured to, and does, provide a tactile feedback to a user. As used herein, a “tactile feedback” means a bias that is transmitted to the user via the actuator that the user has actuated. Further, to be a “multi-level feedback” actuator, as used herein, the tactile feedback is noticeably different as the actuator moves over/through different portions of the actuator&#39;s path of travel. 
     As shown in  FIG.  1   , a solid state circuit breaker assembly  10  (hereinafter, and as used herein, a “circuit breaker assembly”  10 ) is shown in  FIG.  1    (some elements shown schematically). The circuit breaker assembly  10  includes a housing assembly  12 , a conductor assembly  14 , an operating mechanism  16 , a trip assembly  18  and a solid state interrupter assembly  40 . The circuit breaker assembly housing assembly  12  defines an enclosed space  13  in which most other elements of the circuit breaker assembly  10  are disposed or are substantially disposed. In an exemplary embodiment, the circuit breaker assembly housing assembly  12  is elongated. In an exemplary embodiment, the circuit breaker assembly housing assembly  12  includes an elongated, generally circular axle  15  that is structured to be, and is, a rotational mounting for selected elements, as discussed below. The circuit breaker assembly housing assembly axle  15 , in an exemplary embodiment, extends generally laterally relative to the circuit breaker assembly housing assembly  12  longitudinal axis. 
     The solid state interrupter assembly  40 , shown schematically, includes, a solid state switching circuit having solid state switching elements (e.g., without limitation, insulated-gate bipolar transistors (IGBTs)) that are structured to switch between on and off configurations (i.e., close and open configurations and a trip unit circuit (none numbered) which operates as discussed above. It is understood that the solid state interrupter assembly  40  is coupled to, and is in selective communication with, the conductor assembly  14  and a line and load (not shown). In an exemplary embodiment, the trip unit circuit includes, is included within, or is operatively coupled to, the trip assembly  18 . That is, when the trip unit circuit is actuated, so is the trip assembly  18 . As noted above, the trip unit circuit is, effectively, the operating mechanism for the solid state interrupter assembly  40  and the “operating mechanism  16 ” identified above is associated with the contact assembly  19 , discussed below. 
     The conductor assembly  14  includes a number of elongated conductive members (not numbered) which are in electrical communication with a line and a load, not shown. In an exemplary embodiment, any “conductive” element is made from a conductive metal such as, but not limited to, copper, aluminum, gold, silver, or platinum. The conductor assembly  14  further includes a contact assembly  19  having a number of movable contacts  20  and a corresponding number of fixed contacts  22  (one each shown). Hereinafter, this description will address a single pair of contacts  20 ,  22 ; it is, however, understood that, in an exemplary embodiment, the circuit breaker assembly  10  includes multiple pairs of contacts  20 ,  22 . 
     The operating mechanism  16  is operatively coupled to movable contact  20  and is structured to move each movable contact  20  between an open, first position, wherein the movable contact  20  is spaced from, and not in electrical communication with, the fixed contact  22 , and a closed, second position, wherein the movable contact  20  is coupled to or directly coupled to, and is in electrical communication with, the fixed contact  22 . When the movable contact  20  is in the second position, a “use” current passes through the circuit breaker assembly  10 . Further, in an exemplary embodiment, the movable contact  20  is structured as a “wiping contact.” As used herein, a “wiping contact” means a movable contact that slides over the surface of the fixed contact as the movable contact moves into the second position. Thus, as shown in  FIG.  9   , as the movable contact  20  moves into the second position, the movable contact initially touches the fixed contact  22  at an initial interface  23 . When the movable contact is fully in the second position, as shown in  FIG.  10   , the point of the initial interface  23  is moved (upwardly as shown, also shown exaggerated for clarity). It is understood that the wiping motion of the movable contact  20  relative to the fixed contact  22  is structured to, and does, remove debris such as, but not limited to, carbon build up on the pair of contacts  20 ,  22 . 
     The operating mechanism  16  includes a number of elements such as, but not limited to, a crossbar  30  and the multi-level feedback actuator assembly  50 , discussed below. The elements of the operating mechanism  16 , including the crossbar  30 , move between a number of configurations/positions including configurations/positions corresponding to the position of the movable contact  20 . For example, the crossbar  30  moves between at least a first position and a second position; when the crossbar  30  is in its first position, the movable contact  20  is in (or is moving toward) its first position. Similarly, when the crossbar  30  is in its second position, the movable contact  20  is in (or is moving toward) its second position. In an exemplary embodiment, the crossbar  30  is rotatably coupled to the circuit breaker assembly housing assembly  12  and extends generally laterally across the circuit breaker assembly housing assembly  12 . The crossbar  30  includes an elongated body  32 . The crossbar body  32  is structured to be, and is, rotatably coupled to the circuit breaker assembly housing assembly  12 . Further, the crossbar body  32  includes at least one radial extension  34 , i.e., an extension that extends generally radially relative to the crossbar body  32  axis of rotation. At least one rotational coupling  36 , which is shown as an axle  38 , is disposed on the crossbar body radial extension  34 . Further, the movable contact  20  is coupled, directly coupled, or fixed to the crossbar body  32  and, as shown, is disposed on a radial extension  34 . The fixed contact  22  is, in an exemplary embodiment, coupled to the housing assembly  12  adjacent/within the movable contact  20  path of travel. The axis of rotation of the crossbar body radial extension rotational coupling  36 , i.e., crossbar body axle  38 , extend generally parallel to the crossbar body  32  axis of rotation. 
     As is known, and as discussed above, when an overcurrent event is detected, the solid state interrupter assembly  40  interrupts the current. Once the current is interrupted within the solid state interrupter assembly  40 , the trip assembly  18  is structured to move the operating mechanism  16  from the second configuration/position to the first configuration/position in the event of an over-current condition. That is, the trip assembly  18  is structured to cause the operating mechanism  16  to open the contacts  20 ,  22  in the event of an over-current condition. Stated alternately, the trip assembly  18  is structured to cause the operating mechanism  16  to move the movable contact  20  from the second position to the first position in the event of an over-current condition. This is typically accomplished by biasing devices such as, but not limited to a rotary solenoid  60  (discussed below), that cause elements of the operating mechanism  16  to move from the second configuration to the first configuration. 
     In an exemplary embodiment, the operating mechanism  16  includes a multi-level feedback actuator assembly  50 , as shown in  FIGS.  2 - 4   . The multi-level feedback actuator assembly  50  is structured to, and does, move the operating mechanism  16 , and therefore the movable contact  20 , between the first and second configurations/positions. In one embodiment, the multi-level feedback actuator  50  is a multi-level feedback closing actuator assembly  52  that is structured to, and does, move the operating mechanism  16 , and therefore the movable contact  20 , from the first configuration/position to the second configuration/position. That is, in one embodiment, the multi-level feedback actuator  50  is structured to, and does, close the contacts  20 ,  22 . 
     In another embodiment, the multi-level feedback actuator  50  is a multi-level feedback opening actuator assembly  54  that is structured to, and does, move the operating mechanism  16 , and therefore the movable contact  20 , from the second configuration/position to the first configuration/position. That is, in one embodiment, the multi-level feedback actuator  50  is structured to, and does, open the contacts  20 ,  22 . 
     In another embodiment, the multi-level feedback actuator  50  includes both a multi-level feedback closing actuator assembly  52  (hereinafter, and as used herein, the “closing actuator assembly”  52 ) that is structured to, and does, move the movable contact  20  from the first position to the second position, and, a multi-level feedback opening actuator assembly  54  (hereinafter, and as used herein, the “opening actuator assembly”  54 ) that is structured to, and does, move the movable contact  20  from the second position to the first position. 
     In the embodiment discussed below, the multi-level feedback actuator  50  includes both a closing actuator assembly  52  and an opening actuator assembly  54 . In this embodiment, the multi-level feedback closing actuator assembly  52  and the multi-level feedback opening actuator assembly  54  share several components which operate, generally, in a similar manner. The following description addresses the closing actuator assembly  52  first, but it is understood that several elements thereof are also identified as part of the opening actuator assembly  54 , which is discussed further below. Further, the following description recites a “first” primary actuator  90 ,  92  (discussed below); as the following discussion initially addresses the closing actuator assembly  52 , the initial “first” primary actuator  90  that is identified is an actuator for the closing actuator assembly  52 . Subsequently, the description recites a “second” primary actuator  92  that is an actuator for the opening actuator assembly  54 . It is, however, understood that in an embodiment with only a closing actuator assembly  52  or only an opening actuator assembly  54 , the “first” primary actuator  90 ,  92  is an actuator for the disclosed assembly. That is, as used herein, a “first” primary actuator  90 ,  92  is not limited to an actuator for the closing actuator assembly  52 . 
     In an exemplary embodiment, the multi-level feedback actuator assembly  50 , or, the closing actuator assembly  52 , includes a rotary solenoid  60 , an electric actuator assembly  70 , and a manual actuator assembly  80 . It is understood that both the electric actuator assembly  70  and the manual actuator assembly  80  share/utilize the same components such as, but not limited to, a linkage assembly  150  (described below), even if those components are initially identified as part of only one actuator assembly. 
     The rotary solenoid  60  includes a housing assembly  62 , a coil (not shown) and a rotating output shaft  64 . In an exemplary embodiment, the rotary solenoid housing assembly  62  is generally cylindrical and/or disk-like. That is, the rotary solenoid housing assembly  62  includes a generally radial surface and two generally planar axial surfaces, none numbered. In this exemplary embodiment, the rotary solenoid output shaft  64  includes a first end  66  and a second end  68 . The rotary solenoid output shaft first end  66  and the rotary solenoid output shaft second end  68  each extend from opposing axial surfaces of the rotary solenoid housing assembly  62 . Further, each of the rotary solenoid output shaft first end  66  and the rotary solenoid output shaft second end  68  are non-circular. 
     As is known, the rotary solenoid output shaft  64  is responsive to current applied to the rotary solenoid coil. That is, the rotary solenoid output shaft  64  is structured to, and does, rotate between a first position and a second position. In one embodiment, application of a current with first characteristics applied to the rotary solenoid coil causes the rotary solenoid output shaft  64  to rotate from the second position to the first position, and, application of a current with second characteristics applied to the rotary solenoid coil causes the rotary solenoid output shaft  64  to rotate from the first position to the second position. In another embodiment, the rotary solenoid  60  includes a biasing device such as, but not limited to, a spring (not shown) that biases the rotary solenoid output shaft  64  to one of the first or second positions. In this embodiment, the rotary solenoid output shaft  64  is maintained in a selected position by the biasing device and moves to the other position when a current is applied to the rotary solenoid coil. 
     The rotary solenoid  60  is structured to, and does, provide a noticeable feedback when actuated. In an exemplary embodiment, the rotary solenoid  60  rotary solenoid housing assembly  62  includes stops  61 ,  63  that are disposed in the path of travel of at least one element of the linkage assembly  150  and, as shown, the shaft link  160 , discussed below. Thus, when the rotary solenoid output shaft  64  moves between the first and second positions, the linkage assembly  150  impacts the rotary solenoid housing assembly stops  61 ,  63 . Because the stops are disposed outside the rotary solenoid housing assembly  62 , the sound of the impact is not muffled and is, therefore, a “noticeable feedback” as defined above. That is, the rotary solenoid  60  is structured to, and does, generate a sound that is audible to a human through the circuit breaker assembly housing assembly  12  and/or generate a vibration that is detectable by a human via the multi-level feedback actuator assembly  50 . This solves the problem(s) noted above. 
     In an exemplary embodiment, the rotary solenoid  60  is part of, i.e., is utilized by, both the electric actuator assembly  70  and the manual actuator assembly  80 . The electric actuator assembly  70  includes a first switch assembly  72  and a number of conductors such as, but not limited to, wires (shown schematically, not numbered). As with the primary actuators  90 ,  92 , and in an embodiment of the multi-level feedback actuator  50  that includes both a closing actuator assembly  52  and an opening actuator assembly  54 , the switch assembly  72  is described as a “first” switch assembly  72  because there is a “second” switch assembly  1072 , as discussed below. It is understood that in an embodiment with only a closing actuator assembly  52  or only an opening actuator assembly  54 , the switch assembly  72 ,  1072  would not be identified by the terms “first” and “second” as there would be a single switch assembly  72 ,  1072 . As is known, the switch assembly conductors are coupled to, and are in electric communication with, the rotary solenoid coil. Thus, when the switch assembly  72 ,  1072  is actuated, a charge/current is applied to the rotary solenoid coil and the rotary solenoid output shaft  64  moves between positions. That is, the switch assembly  72 ,  1072  is structured to, and does, hold a charge (or otherwise selectively allow a current to pass therethrough) that is sufficient to cause the rotary solenoid output shaft  64  to move between positions. In an exemplary embodiment, the switch assembly  72 ,  1072  includes a number of capacitors (none shown). Regardless of the configuration of the switch assembly  72 ,  1072 , the switch assembly  72 ,  1072  includes (or passes on) a charge/current sufficient to cause the rotary solenoid output shaft  64  to rotate between first/second positions. In another exemplary embodiment, the switch assembly  72 ,  1072 , or a construct in electrical communication with the switch assembly  72 ,  1072 , includes an electrical coupling structured to be connected to a source of power. Thus, if the switch assembly  72 ,  1072  is not charged, a user is able to charge the switch assembly  72 ,  1072 . 
     In an exemplary embodiment, and as shown in  FIG.  5   , the first switch assembly  72  includes a housing assembly  74  and an actuator  76 . As shown, the first switch assembly actuator  76  includes a lever  77 /button  78  combination. The first switch assembly actuator  76  is structured to, and does, move between an unactuated, first position and an actuated, second position. When the first switch assembly actuator  76  is moved into the actuated, second position, the first switch assembly  72  passes a charge/current to the rotary solenoid coil. Thus, the first switch assembly  72  is operatively coupled to the rotary solenoid  60  and the first switch assembly  72  is structured to, and does, actuate the rotary solenoid  60 . 
     As shown in  FIGS.  2 - 4   , the manual actuator assembly  80  includes a number of primary actuators  90 , a flag  130 , a linkage assembly  150 , and a cam assembly  200 . In an embodiment wherein the multi-level feedback actuator assembly  50  includes both a closing (or first) actuator assembly  52  and an opening (or second) actuator assembly  54 , the number of primary actuators  90  includes at least a first actuator  94  and a second actuator  96 . As discussed above, in this embodiment, the first actuator  94  is associated with, and is structured to actuate, the closing actuator assembly  52 . The second actuator  96  is associated with, and is structured to actuate, the opening actuator assembly  54 . 
     The first actuator  94  includes a body  100 . As shown in  FIG.  4   , the first actuator body  100  is elongated and includes a first end  102 , a medial portion  104 , and a second end  106 . The first actuator body first end  102  is structured to be, and is, rotatably coupled to the circuit breaker housing assembly  12 . The first actuator body  100  is structured to move between an unactuated first position and an actuated second position. As indicated by the names, when the first actuator body  100  is unactuated, the first actuator body  100  is in the first position. When the first actuator body  100  is fully actuated, it is in the second position. In an exemplary embodiment, the first actuator body first end  102  includes a rotational coupling  108  such as, but not limited to, an axle  109  that is structured to be, and is, coupled to the circuit breaker housing assembly  12 . That is, in an exemplary embodiment, the circuit breaker housing assembly  12  includes a circular passage (not numbered) that corresponds to the first actuator body first end axle  109 . It is noted that in this configuration, the first actuator body  100  moves, i.e., rotates, generally in a single plane. That is, the longitudinal axis of the first actuator body  100  moves, i.e., rotates, generally in a plane which extends generally perpendicular to the first actuator body first end rotational coupling  108  axis of rotation. The first actuator body medial portion  104  defines a user interface such as, but not limited to, a button  103 . In an exemplary embodiment, the first actuator body medial portion  104  also includes a switch assembly interface  107  which is shown as an extension  105  that extends generally opposite the button  103 . The first actuator body second end  106  is structured to be, and is, operatively coupled to the linkage assembly  150 . Thus, the first actuator body second end  106  is structured to, and does, operatively engage the linkage assembly  150 . That is, first actuator body  100  is operatively coupled to the linkage assembly  150  and is structured to, and does, move at least one link  160 ,  170 ,  180 ,  190 , discussed below. 
     Further, as discussed below, the linkage assembly  150  includes elements that move over a generally circular path. The first actuator body  100  also moves over a generally arcuate path (which is also the first actuator  94  “path” as used herein) but, in the embodiment shown, the first actuator body  100  path has a different radius compared to the path of the linkage assembly  150  elements. In this configuration, the first actuator body second end  106  does not move over a path that corresponds to the linkage assembly  150  elements. As such, in this embodiment, the first actuator body second end  106  includes a rotational coupling  111  and a rotating extension assembly  110 . The rotating extension assembly  110  includes a rotational coupling  112 , an extension body  114 , and a biasing device such as, but not limited to, a return spring  116 . The rotating extension assembly extension body  114  is elongated and includes a first end  120  and a second end  122 . The rotating extension assembly extension body first end  120  includes a rotational coupling  124 . The rotating extension assembly extension body second end  122  is structured to, and does, operatively engage the linkage assembly  150 . Further, the rotating extension assembly extension body second end  122  is structured to be, and is, operatively engaged by the linkage assembly  150 . 
     The rotating extension assembly  110  is assembled as follows. The rotating extension assembly extension body first end rotational coupling  124  is movably coupled to the first actuator body second end rotational coupling  111 . Further, the rotational couplings  108 ,  111 ,  124  are oriented so that the longitudinal axis of the rotating extension assembly extension body  114  moves in generally the same plane as, or a generally parallel plane to, the first actuator body&#39;s  100  plane of motion. The rotating extension assembly return spring  116  is operatively coupled to both the first actuator body  100  and the rotating extension assembly extension body  114 . The rotating extension assembly return spring  116  is structured to, and does, bias the rotating extension assembly extension body  114  toward the linkage assembly  150 . 
     As the rotating extension assembly  110  acts as an extension of the first actuator body  100  hereinafter, and as used herein with respect elements/assemblies other than the first actuator  94 , the rotating extension assembly extension body second end  122  is considered the equivalent of the first actuator body second end  106 . That is, as used herein, a statement such as “the first actuator body second end  106  operatively engages the linkage assembly  150 ” means that the rotating extension assembly extension body second end  122  operatively engages the linkage assembly  150 . 
     The second actuator  96  is discussed below in association with the opening actuator assembly  54 . 
     Before discussing the linkage assembly  150  in detail, it is noted that circuit breaker assemblies  10  are well known to include single “links” or “link members” that include a plurality of generally planar laminations. That is, the laminations have generally the same size, shape and other characteristics (or are coupled to each other so as to form separate lamination assemblies having generally the same size, shape and other characteristics) and are, in an exemplary embodiment, coupled to other elements at generally the same locations. Thus, for example, two laminations of a single “link” that are coupled to a rotating element such as, but not limited to, the crossbar  30 , appear as a single element when viewed along the crossbar  30  axis of rotation. The laminations are part of the same “link” even when the laminations are spaced from each other. Such laminations are, as used herein, the same “link” or “linkage member.” Thus, it is understood that while the Figures may show a “link” having two or more separate laminations, the following description will identify those laminations by a single name and reference number, i.e., the “link” name and reference number. For example, as shown in  FIG.  4   , the shaft link  160 , discussed below, includes a plurality of laminations  160 A,  160 B,  160 C,  160 D,  160 E,  160 F which form a single shaft link  160 . That is, even though the various laminations  160 A,  160 B,  160 C,  160 D,  160 E,  160 F have different shapes, the laminations  160 A,  160 B,  160 C,  160 D,  160 E,  160 F are coupled to each other so as to form lamination assemblies, i.e., the “links,” wherein the lamination assemblies have generally the same size, shape and other characteristics. That is, as used herein and as shown, the laminations  160 A,  160 B,  160 C and  160 D,  160 E,  160 F or assemblies of laminations  160 A,  160 B,  160 C and  160 D,  160 E,  160 F in a link have “generally the same size, shape and other characteristics.” It is noted that selected laminations  160 A,  160 B,  160 C and  160 D,  160 E,  160 F are disposed on opposite sides of rotary solenoid  60  but are, as used herein, a single “link.” That is, as stated above, the laminations of a single “link” are, in some embodiments, spaced from each other. 
     The linkage assembly  150  is structured to be, and is, operatively coupled to the crossbar  30 , the rotary solenoid  60  and the first actuator body  100 . Thus, the linkage assembly  150  is structured to, and does, operatively engage the crossbar  30 , the rotary solenoid  60  and the first actuator body  100 . Further, the crossbar  30  is structured to be, and is, operatively coupled to the linkage assembly  150  and, as such, is structured to, and does, operatively engage the linkage assembly  150 . Similarly, the rotary solenoid  60  is structured to be, and is, operatively coupled to the linkage assembly  150  and, as such, is structured to, and does, operatively engage the linkage assembly  150 . Similarly, the first actuator body  100  is structured to be, and is, operatively coupled to the linkage assembly  150  and, as such, is structured to, and does, operatively engage the linkage assembly  150 . That is, generally, forces/bias applied to any of the crossbar  30 , the rotary solenoid  60 , the first actuator body  100  and the linkage assembly  150  are transferred to the elements operatively coupled thereto. Further, as detailed below, the linkage assembly  150  is structured to apply at least a first bias to the first actuator body  100  and a second bias to the first actuator body  100 . The first bias is noticeably different from said second bias. 
     In this configuration, the multi-level feedback actuator assembly  50  is structured to, and does, provide an “indicative feedback.” As used herein, an “indicative feedback” means that noticeably different forces/biases are applied to a user interface such as, but not limited to, a first actuator  94 , so that, when a user actuated the user interface, the user is able to sense and differentiate the noticeably different forces/bias applied to a user interface via the user interface. Prior to use, the user is informed as to what the indicative feedback indicates. For example, the user is informed, e.g., via a user manual, that one type of bias/feedback indicates that a lesser bias/feedback indicates that the first actuator  94  is actuating the electric actuator assembly  70  and a greater bias/feedback indicates that the first actuator  94  is actuating the manual actuator assembly  80 . 
     In an exemplary embodiment, the linkage assembly  150  includes a shaft link  160 , an upper link  170 , a middle link  180  and a lower link  190 . The shaft link  160  includes an elongated body  162  having a first end  164 , a medial portion  165 , and a second end  166 . Each of the shaft link body first end  164 , shaft link body medial portion  165  and shaft link body second end  166  include a coupling. In an exemplary embodiment, the shaft link  160  includes at least two laminations (not numbered) that are spaced from each other and thereby define a yoke (not numbered). In an exemplary embodiment, the shaft link body first end  164  defines a rotational coupling  161 . In an exemplary embodiment, a yoke at the shaft link body first end  164  includes two openings (not numbered) which are the shaft link body first end coupling  161 . Further, a wheel  163  having an axle (not numbered) is rotatably coupled to the shaft link body first end  164  yoke openings. As discussed below, the wheel  163  is also identified as the cam assembly second cam member  204  (discussed below). The wheel  163 , and therefore the shaft link body first end  164 , is structured to, and does, operatively engage the cam assembly first cam member  202 , discussed below. Similarly, the cam assembly first cam member  202  is structured to, and does, operatively engage the wheel  163 , and therefore the shaft link body first end  164 . In an alternate embodiment, the shaft link body first end  164  defines a cam surface (not shown) which is the second cam member that is structured to, and does, operatively engage the cam assembly first cam member  202 . 
     The shaft link body medial portion  165  coupling includes an opening  167  that is shaped to substantially correspond to the longitudinal cross-sectional shape of the rotary solenoid output shaft  64 . In this configuration, the shaft link body medial portion  165  is structured to be, and is, fixed to the rotary solenoid output shaft  64 . Thus, the shaft link  160  rotates with the rotary solenoid output shaft  64 . That is, the rotary solenoid output shaft  64  is operatively coupled to, and therefore operatively engages, the shaft link  160 . Similarly, the shaft link  160  is operatively coupled to, and therefore operatively engages, the rotary solenoid output shaft  64 . 
     The shaft link body second end  166  coupling is a rotational coupling such as a substantially circular opening  168 . The shaft link body second end  166  coupling is structured to be, and is, rotationally coupled to the middle link  180 . Further, an edge surface of the shaft link body second end  166  is structured to be, and is, a first actuator interface  169 . In an exemplary embodiment, the shaft link body second end first actuator interface  169  is disposed between the shaft link body medial portion opening  167  and the shaft link body second end opening  168 . 
     The upper link  170  includes a body  172 . The upper link body  172  is elongated and, as shown, generally curvilinear. The upper link body  172  includes a first end  174  and a second end  176 . Each of the upper link body first end  174  and second end  176  include a coupling such as, but not limited to, a rotational coupling. As shown, each of the upper link body first end  174  and second end  176  include a substantially circular opening  175 ,  177 . 
     The middle link  180  includes a body  182 . The middle link body  182  is elongated and, as shown, generally straight. The middle link body  182  includes a first end  184  and a second end  188 . Each of the middle link body first end  184  and second end  188  include a coupling such as, but not limited to, a rotational coupling. In an exemplary embodiment, each of the middle link body first end  184  and second end  188  include a substantially circular opening  185 ,  189 , respectively. In another exemplary embodiment, however, the middle link body first end opening  185  is an elongated slot  185 A with a longitudinal axis that extends along, or generally parallel to, the middle link body  182  longitudinal axis. It is noted that when the middle link body first end opening  185  is an elongated slot  185 A, an element coupled thereto is able to move within the slot without causing the middle link body  182  to move. That is, for example and as discussed below, the shaft link body  162  is coupled to the middle link body first end  184  by a pin (not numbered). Thus, when the shaft link body  162  moves, the pin moves in the middle link body first end slot  185 A until the pin abuts an end of the slot  185 A. Only when the pin abuts an end to the slot  185 A is the motion of the shaft link body  162  transferred to the middle link body  182 . 
     The lower link  190  includes a body  192 . The lower link body  192  is elongated and, as shown, generally straight. The lower link body  192  includes a first end  194 , a medial portion  196  and a second end  198 . Each of the lower link body first end  194 , medial portion  196  and second end  198  include a coupling such as, but not limited to, a rotational coupling. As shown, each of the lower link body first end  194 , medial portion  196  and second end  198  include a substantially circular opening  195 ,  197 ,  199 . 
     The cam assembly  200  includes a first cam member  202 , a second cam member  204  and a bias device  206 . In an exemplary embodiment, the cam assembly first cam member  202  includes a generally planar body  210  that defines a rotational coupling and a cam surface  212 . That is, the cam assembly first cam member body  210  defines a substantially circular opening  214 . The circuit breaker assembly housing assembly axle  15  is structured to be, and is, a rotational mounting for the cam assembly first cam member body  210 . That is, the circuit breaker assembly housing assembly axle  15  extends through the cam assembly first cam member body opening  214 . The circuit breaker assembly housing assembly axle  15  is disposed adjacent, or immediately adjacent, the shaft link body first end  164  path of travel, as discussed below. In an exemplary embodiment, the edge surface of the cam assembly first cam member body  210  that is disposed adjacent the shaft link body first end  164  path of travel defines the cam assembly first cam member body cam surface  212 . Further, in an exemplary embodiment, the cam assembly first cam member body cam surface  212  is generally curvilinear. As discussed above, the cam assembly second cam member  204  is, in an exemplary embodiment, the wheel  163 . That is, the cam assembly second cam member  204  includes a generally circular, i.e., a disk-like, body  216  wherein the radial surface is a generally circular cam surface  218 . 
     In an exemplary embodiment, the cam assembly bias device  206  is a spring  220  that is structured to, and does, engage/apply bias to at least one of the cam assembly first cam member  202  or the cam assembly second cam member  204 . The cam assembly bias device  206  is structured to, and does, create a line of force  230 , discussed below, extending from a point of contact between the cam assembly first cam member  202  and the second cam member  204  through the shaft link body first end coupling  161 . In an exemplary embodiment, the circuit breaker assembly housing assembly  12  includes a spring mounting  222  disposed adjacent to the circuit breaker assembly housing assembly axle  15 . The cam assembly bias device  206 , i.e., spring  220 , is coupled, directly coupled, or fixed to the circuit breaker assembly housing assembly spring mounting  222 . 
     The multi-level feedback actuator assembly  50  is assembled as follows. The rotary solenoid  60  is disposed in the circuit breaker assembly housing assembly enclosed space  13 . As is known, the circuit breaker assembly housing assembly  12  includes a mounting (not numbered) structured to support the rotary solenoid  60 . Thus, the rotary solenoid  60  is coupled, directly coupled, or fixed to the circuit breaker assembly housing assembly  12 . As shown, and in an exemplary embodiment, the axis of rotation  65  of the rotary solenoid output shaft  64  extends generally parallel to the axis of rotation of the crossbar  30 . 
     The shaft link  160  is coupled, directly coupled, or fixed to the rotary solenoid output shaft  64 . In an exemplary embodiment, the shaft link body medial portion opening  167  is directly coupled to the rotary solenoid output shaft  64 . Further, because the rotary solenoid output shaft  64  and the shaft link body medial portion opening  167  are both non-circular (and have corresponding shapes), the shaft link  160  is fixed to the rotary solenoid output shaft  64  and rotates therewith. Further, in this configuration, forces and biases applied by either the shaft link  160  or the rotary solenoid output shaft  64  is transferred to the other. Further, as the rotary solenoid output shaft  64  rotates and as the shaft link  160  moves therewith, the shaft link  160 , and its sub-components, each have a path of travel. As noted above, the wheel  163 , i.e., the cam assembly second cam member  204 , is rotatably coupled to the shaft link body first end  164 . The shaft link body second end  166  is rotatably coupled to the middle link body first end  184 . 
     In an exemplary embodiment, the upper link body first end  174  is rotatably coupled to the circuit breaker assembly housing assembly axle  15 . That is, the circuit breaker assembly housing assembly axle  15  extends through the upper link body first end opening  175 . The upper link body second end  176  is rotatably coupled to the lower link body first end  194 . That is, in an exemplary embodiment, an axle or pin (not numbered) extends through both the upper link body second end opening  177  and the lower link body first end opening  195 . 
     The middle link body second end  188  is rotatably coupled to the lower link body  192 . In an exemplary embodiment, an axle or pin (not numbered) extends through both the middle link body second end opening  189  and the lower link body medial portion opening  197 . Thus, the middle link  180 , i.e., the middle link body  182  extends between, and is rotatably coupled to both, the shaft link  160 , i.e., the shaft link body  162 , and the lower link  190 , i.e., lower link body  192 . The lower link body  192  is further rotatably coupled to the crossbar  30 . In an exemplary embodiment, the lower link body second end opening  199  is rotatably coupled to the crossbar body radial extension rotational coupling  36 , i.e., crossbar body axle  38 . 
     As shown in the figures, the axis of rotation for each rotational coupling in the linkage assembly  150  extends generally, or substantially, parallel to the crossbar body  32  axis of rotation. Further, while not discussed in detail, as is known in the art, the motion of the various links in the linkage assembly  150  are, in an exemplary embodiment, stopped or limited by stop pins, not numbered. It is understood that the stop pins are positioned to stop/limit the motion of the linkage assembly  150  to the first and second position of the movable contact  20 . That is, for example, if the links of the linkage assembly  150  are moving in a first direction as the movable contact  20  moves into the first position, the stop pins are positioned so as to stop the motion of the links of the linkage assembly  150  in the first direction once the movable contact  20  is in the first position. 
     The cam assembly first cam member  202  is rotatably coupled to the circuit breaker assembly housing assembly axle  15  and is disposed adjacent, or immediately adjacent, the shaft link body first end  164  path of travel. Further, the cam assembly bias device  206 , i.e., spring  220 , is disposed adjacent the cam assembly first cam member  202  and is structured to, and does, bias the cam assembly first cam member  202  toward the cam assembly second cam member  204 , i.e., wheel  163 . That is, the cam assembly bias device  206  causes the cam assembly first cam member  202  to operatively engage the cam assembly second cam member  204 . 
     The first actuator body  100  is rotatably coupled to the circuit breaker housing assembly  12 . That is, the first actuator body first end  102  is rotatably coupled to the circuit breaker housing assembly  12 . In this configuration, the first actuator body  100  has a path of travel. Further, the first actuator body medial portion user interface, i.e., button  103  is disposed on the outside of the circuit breaker housing assembly  12 . The first actuator body second end  106  is operatively coupled to the linkage assembly  150 . That is, the first actuator body second end  106  is operatively coupled to the shaft link body second end first actuator interface  169 . As shown in  FIG.  6   , the first actuator body second end  106  abuts the shaft link body second end first actuator interface  169  and, as the first actuator body  100  moves over the first actuator body  100  path second portion (as discussed below), the first actuator body second end  106  engages the shaft link body second end first actuator interface  169 . Further, the multi-level feedback actuator assembly  50  includes an actuator spring  101 . The multi-level feedback actuator assembly actuator spring  101  is disposed between the first actuator body  100  and the circuit breaker housing assembly  12 . The multi-level feedback actuator assembly actuator spring  101  is structured to, and does, bias the first actuator body  100  to a first position, as described below. 
     The first switch assembly  72  is disposed adjacent the first actuator body  100  path of travel. That is, the first switch assembly  72  is positioned so that the first switch assembly actuator  76  is disposed in the path of travel of the first actuator body medial portion switch assembly interface  107 . As noted above, the first switch assembly  72  is further operatively coupled to the rotary solenoid  60  and actuation of the first switch assembly actuator  76  causes the rotary solenoid  60  to actuate. 
     The flag  130  includes a body  132  having two indicia (not numbered) thereon. The indicia are different and are associated with the position of the movable contact  22 . As shown, the indicia are the words “open” and “closed.” The flag  130 , i.e., flag body  132 , is operatively coupled to the crossbar  30  and moves therewith into corresponding positions. That is, when the crossbar  30  is in the first position, the flag  130  is in a first position, and, when the crossbar  30  is in the second position, the flag  130  is in a second position. As discussed above, the circuit breaker assembly housing assembly  12  includes an opening, or “window,” through which only one of the indicia is visible. When the crossbar  30  is in the first position, the “open” indicia is visible. When the crossbar  30  is in the second position, the “closed” indicia is visible. 
     In this configuration, the first actuator body  100  is operatively coupled to the linkage assembly  150  and is structured to, and does, move at least one link member, e.g., shaft link  160 . Further, the linkage assembly  150  is operatively coupled to the first actuator body  100 , the rotary solenoid output shaft  64  and the cam assembly  200 . Further, the cam assembly  200  is operatively coupled to the linkage assembly  150 . Further, the cam assembly bias device  206  is structured to, and does, apply a bias to at least one of said first cam member  202  and/or the second cam member  204 . Further, the cam assembly  200  is structured to, and does, apply bias to the linkage assembly  150 . 
     In this configuration, the first actuator body  100  is structured to, and does, move over a path having at least a first portion and a second portion as it moves between its first position and its second position. As described below, and as used herein, the first actuator body  100  path “first portion” and “second portion” are those portions of the first actuator body  100  path wherein the first actuator body  100  operatively engages different sets of elements of the multi-level feedback actuator assembly  50 . That is, as used herein, the first actuator body  100  path “first portion” is that portion of the first actuator body  100  path wherein the first actuator body  100  operatively engages the first switch assembly  72 , i.e., the first switch assembly actuator  76 . The first actuator body  100  path “second portion” is that portion of the first actuator body  100  path wherein the first actuator body  100  operatively engages the linkage assembly  150  as well as the first switch assembly  72 . When the first actuator body  100  is at the end of the first actuator body  100  path “second portion,” the first actuator body  100  is in the second position. It is noted that in some configurations the first actuator body  100  moves over a path wherein the first actuator body  100  does not operatively engage another element of the multi-level feedback actuator assembly  50 . Such a portion of the first actuator body  100  path is, as used herein, a “null portion” of the first actuator body  100  path, i.e., an embodiment wherein the middle link body first end opening  185  is an elongated slot  185 A. 
     Further, the linkage assembly  150  is structured to, and does, apply at least a first bias to the first actuator body  100  and a second bias to the first actuator body  100 . Further, the first bias is noticeably different from the second bias. That is, the linkage assembly  100  is structured to apply the first bias to the first actuator body  100  when the first actuator body  100  is disposed in the first actuator body  100  path first portion, and, the linkage assembly  150  is structured to, and does, apply the second bias to the first actuator body  100  when the first actuator body  100  is disposed in the first actuator body  100  path second portion. 
     That is, the multi-level feedback actuator assembly  50  operates as follows. Initially, for the sake of this example using a closing actuator assembly  52 , it is assumed that the movable contact  20  is in the open, first position and the operating mechanism  16  is in the corresponding first configuration, i.e., the crossbar  30  is in a first position. Further, the first actuator body  100  is in the unactuated, first position. 
     When a user actuates the first actuator body medial portion user interface, i.e., when the user presses button  103 , the first actuator body  100  moves over the first actuator body  100  path first portion. As the first actuator body  100  moves over the first actuator body  100  path first portion, the first actuator body  100 , and as shown, the first actuator body medial portion switch assembly interface  107  engages, and actuates, the first switch assembly actuator  76 . Thus, first actuator body  100  is structured to, and does, operatively engage the first switch assembly actuator  76  when the first actuator body  100  is disposed in the first actuator body  100  path first portion. As discussed above, following actuation of the first switch assembly actuator  76 , the rotary solenoid  60  is actuated and moves the rotary solenoid output shaft  64  from a first position to a second position. Rotation of the rotary solenoid output shaft  64  causes the linkage assembly  150  to move from a first configuration to a second configuration which, in turn, causes the crossbar  30  (and other elements of the operating mechanism  16 ) to move from a first position/configuration to a second position/configuration. As discussed above, when the operating mechanism  16  moves from a first configuration to a second configuration, the movable contact  20  moves from the first position to the second position. That is, the movable contact  20  closes. 
     This is the normal operation of the electric actuator assembly  70 . That is, the electric actuator assembly  70  includes the first actuator  94 , the rotary solenoid  60 , and the first switch assembly  72 . Further, as discussed below, actuating the electric actuator assembly  70  requires minimal force on the first actuator  94 . That is, the counter, or feedback, forces applied by the electric actuator assembly  70  are relatively low when compared to the feedback forces generated by the manual actuator assembly  80 , as discussed below. Thus, there is a first bias applied to the first actuator  94  as the first actuator  94  moves over the first actuator body  100  path first portion. Further, if the electric actuator assembly  70  actuates the rotary solenoid  60 , there is a noticeable feedback, as described above. Further, the flag  130  moves from its first position to its second position indicating that the movable contact  20  is in the second position. Thus, the user is informed that the electric actuator assembly  70  has moved the movable contact  20  from the first position to the second position and the user stops pressing on the first actuator body medial portion user interface, i.e., button  103 . 
     If the electric actuator assembly  70  is not able to move the movable contact  20  from the first position to the second position, e.g., if the first switch assembly  72  is not able to provide a charge to the rotary solenoid  60 , then the user must utilize the manual actuator assembly  80  to move the movable contact  20  from the first position to the second position. This is accomplished by continuing to press on the first actuator body medial portion user interface, i.e., button  103 . 
     That is, as the user continues to press on the first actuator body medial portion user interface, i.e., button  103 , the first actuator body  100  moves into the first actuator body  100  path second portion. As the first actuator body  100  moves into the first actuator body  100  path second portion, the first actuator body  100  engages the linkage assembly  150 . That is, the first actuator body second end  106  engages the shaft link body second end first actuator interface  169 . This bias causes the shaft link  160  to rotate. Thus, the first actuator body  100  is structured to, and does, operatively engage the linkage assembly  150  when the first actuator body  100  is disposed in the first actuator body  100  path second portion. As noted above, the shaft link  160  is operatively coupled to the rotary solenoid output shaft  64 , thus, rotation of the shaft link  160  causes the rotary solenoid output shaft  64  to rotate from a first position to a second position and generates a noticeable feedback. Further, as described above, rotation of the rotary solenoid output shaft  64  causes the operating mechanism  16 , and therefore the movable contact  20 , to move into their second positions/configurations. 
     In general, the linkage assembly  150  provides a counter, or feedback, bias/force to the first actuator body  100 . In an exemplary embodiment, the bias the linkage assembly  150  provides to the first actuator body  100  while the first actuator body  100  is in the first actuator body  100  path first portion is less than the bias the linkage assembly  150  provides to the first actuator body  100  while the first actuator body  100  is in the first actuator body  100  path second portion. This is accomplished, at least in part, by the forces generated in the cam assembly  200 . 
     That is, as noted above and as shown in  FIGS.  6 - 10   , the cam assembly bias device  206  creates a line of force  230  extending from a point of contact between the cam assembly first cam member  202  and the second cam member  204  through shaft link body first end coupling  161 . Initially, i.e., when the first actuator body  100  is disposed in the first actuator body  100  path first portion, the line of force  230  extends to a “first side” of the solenoid output shaft axis of rotation  65 . As the rotary solenoid output shaft  64  and the shaft link  160  move/rotate from a first position to a second position and when the first actuator body  100  is disposed in the first actuator body  100  path second portion, the line of force  230  extends to a “second side” of the solenoid output shaft axis of rotation  65 . In this configuration, the counter, or feedback, forces applied by the linkage assembly  150  on the first actuator body  100  are initially low (when compared to the higher forces, discussed below) when the first actuator body  100  is disposed in the first actuator body  100  path first portion. As the first actuator body  100  moves into the first actuator body  100  path second portion, the counter, or feedback, forces applied by the linkage assembly  150  on the first actuator body  100  increase until the line of force  230  passes over the solenoid output shaft axis of rotation  65 . After the line of force  230  passes over the solenoid output shaft axis of rotation  65 , the counter, or feedback, forces applied by the linkage assembly  150  on the first actuator body  100  rapidly decrease to nothing or a negligible amount. Thus, the combination of the linkage assembly  150  and the cam assembly  200  produce a feedback, or response, similar to a toggle. A specific example of the counter, or feedback, forces is shown below. 
     Before discussing the specific example of counter, or feedback, forces, the “first side” and “second side” of the solenoid output shaft axis of rotation  65  are defined as follows. As used herein, the “sides” of an axis of rotation upon which a line of force is disposed are determined as follows. As shown in  FIG.  11   , the “sides” are determined while viewed along the axis of rotation. That is, as shown, the axis of rotation is represented as a point in  FIG.  11    because the image is shown “along the axis of rotation.” Further, all lines of force, and any other lines discussed herein, are limited to a two-dimensional representation of such a line as seen when viewed “along the axis of rotation,” i.e., as shown in  FIG.  11   . That is, all lines are limited to the plane as shown in  FIG.  11   , which is a view along the axis of rotation. The “sides” of the axis of rotation are determined when the line of force does not pass through the axis of rotation and when the movable contact is in either the first position or second positon. That is, the “sides” of the axis of rotation relative to the closing actuator assembly  52  are determined when the movable contact  20  is in the first position, and, the “sides” of the axis of rotation relative to the opening actuator assembly  54  are determined when the movable contact  20  is in the second position. To identify the “sides” of the axis of rotation, a “dividing line” that is parallel to the initial location and direction of the line of force and which passes through the axis of rotation is identified. It is understood that the “initial location and direction of the line of force” for the closing actuator assembly  52  means the location and direction of the line of force when the closing operation begins. Conversely, the “initial location and direction of the line of force” for the opening actuator assembly  54  means the location and direction of the line of force when the opening operation begins. The side of the “dividing line” that initially includes the line of force is the “first side” of the axis of rotation. The opposite side of the “dividing line” is the “second side” of the axis of rotation. That is, the side of the “dividing line” without the initial line of force is the “second side” of the axis of rotation. Further, the location of a “line” (other than the “dividing line” or any other line that passes through the axis of rotation) is determined at a location that is “radial” to the axis of rotation and wherein the radial line intersects the other line generally perpendicularly. That is, a radial line from the axis of rotation extends to, and generally perpendicular to, the line of force. The location where the radial line intersects the line of force determines which side of the “dividing line,” i.e., which side of the axis of rotation, the line of force is located. That is, as used herein, the “location” of a line of force relative to an axis of rotation is identified at the intersection of a radial line from the axis of rotation which is generally perpendicular to the line of force. Further, if the intersection of a radial line from the axis of rotation and the line of force is located on the “dividing line,” then the line of force is, as used herein, located on the “first side” of the axis of rotation. 
     With these definitions in mind, and as shown in  FIGS.  6 - 10   , during the use of the closing actuator assembly  52 , the first actuator  94  is in its first position and the line of force  230  is disposed on the first side of the solenoid output shaft axis of rotation  65 . As a user actuates the first actuator  94  (which in this example is the actuator associated with the closing actuator assembly  52 ), the linkage assembly  150  causes the line of force  230  to move. That is, the motion of the first actuator  94  cause the linkage assembly  150  elements to move. The motion of the linkage assembly  150  causes the location of the line of force  230  to move. 
     As the first actuator  94  moves over the first actuator body  100  path first portion, the line of force  230  remains on the first side of the solenoid output shaft axis of rotation  65 . Further, force applied to the first actuator body medial portion user interface, i.e., button  103 , is relatively low compared to a latter force applied as discussed below. Similarly, the force the linkage assembly  150  applies to the rotary solenoid output shaft  64  is relatively low compared to latter forces applied to the rotary solenoid output shaft  64 . Further, and in an exemplary embodiment, as the first actuator  94  moves over the first actuator body  100  path first portion, the motion of the linkage assembly  150  has a negligible effect on the crossbar  30 . That is, in an exemplary embodiment wherein the middle link body first end opening  185  is an elongated slot  185 A, the initial motion of the first actuator  94  is not transferred to the crossbar  30  via the linkage assembly  150  because the motion of shaft link  160  is not transferred to middle link  180  until the pin coupling links  160 ,  180  move to the end of elongated slot  185 A. Further, it is noted that when the pin coupling links  160 ,  180  move to the end of elongated slot  185 A, the first actuator body  100 , and as shown rotating extension assembly  110 , is operatively coupled to, and operatively engages, both the shaft link  160  and the middle link  180 . 
     As the user continues to press the first actuator  94 , the counter forces generated by the multi-level feedback actuator assembly  50  continue to increase. That is, as the first actuator  94  moves into, and over, the first actuator body  100  path second portion, the counter forces increase and are noticeably different from the counter forces generated by the multi-level feedback actuator assembly  50  when the first actuator body  100  is in the first actuator body  100  path first portion. Further, the motion of the linkage assembly  150  starts to noticeably effect the crossbar  30 . That is, the crossbar  30  rotates and moves the movable contact  20  toward the second position. As shown in the chart below, the feedback forces generated on the first actuator  94  by the linkage assembly  150  are greatest as the crossbar  30  rotates and moves the movable contact  20  toward the second position. Just before the movable contact  20  engages the fixed contact  22 , the feedback forces generated on the first actuator  94  by the linkage assembly  150  begin to reduce. When the movable contact  20  engages the fixed contact  22 , the feedback forces generated on the first actuator  94  by the linkage assembly  150  are reduced by a noticeably different amount. Moreover, as the first actuator  94  moves into, and over, the first actuator body  100  path second portion, the line of force  230  remains on the first side of the solenoid output shaft axis of rotation  65 . As the movable contact  20  engages the fixed contact  22 , the line of force  230  crosses over to the second side of the solenoid output shaft axis of rotation  65 . The configuration of the linkage assembly  150  as the line of force  230  crosses over the solenoid output shaft axis of rotation  65  is identified herein as the “toggle.” Thus, as shown in the chart below, when the linkage assembly  150  passes over the toggle configuration, the feedback forces generated on the first actuator  94  by the linkage assembly  150  are reduced by an amount that is noticeably different when compared to the feedback forces generated on the first actuator  94  by the linkage assembly  150  when the line of force  230  is on the first side of the solenoid output shaft axis of rotation  65 . Moreover, as the as the line of force  230  crosses over the solenoid output shaft axis of rotation  65 , the movable contact  20  rapidly moves from the first position to the second position. That is, the movable contact  20  snaps closed. The rapid motion of the movable contact  20  from the first position to the second position reduces the chance of an arc being created and/or reduces the duration of an arc if an arc is created. At this point, the first actuator body  100  has moved into a third portion of the first actuator body  100  path of travel. Moreover, at this point in the actuation process, the movable contact has moved into the second position. That is, the contacts  20 ,  22  are closed. 
     In an exemplary embodiment, the multi-level feedback actuator assembly  50  has the characteristics shown in the following chart. 
                                                     The solenoid                   has 2 in/lb min           lbs Force       in/lbs torque       button   to press        needed by       degrees   button       solenoid to       closed   (10)   description   close (2 in/lbs)                  0.00   0.72   Breaker open   0.00       0.50   1.69   Close button spring only   0.32       1.00   1.59   Switch activation   0.28       1.50   1.94       0.39       2.00   2.75       0.65       2.28   4.55   No movement of crossbar only    1.23               solenoid rotation up to this point           2.50   5.86   Before contact touch   1.59       3.00   3.75   Before contact touch   0.88       3.40   3.52   Contact touch   0.77       3.50   3.20   Opening spring cam near toggle    0.68               point           4.07   0.83   At toggle   0.00       4.50   0.83   Closed   0.00       5.00   0.83   Breaker closed and over toggle   0.00                    
Thus, in general, as a user begins to actuate the first actuator body medial portion user interface, i.e., button  103 , there is initially a minimal feedback as the first actuator body  100  moves over the null portion of the path (if the null portion exists due to elongated slot  185 A as noted above) as well as the first actuator body  100  path first portion. During this time, the linkage assembly  150  applies a first bias to the first actuator body  100  which is detectable by the user. As the first actuator body  100  moves over the first actuator body  100  path first portion, the first actuator body  100  actuates the first switch assembly  72 . That is, the first actuator body  100  actuates the first switch assembly actuator  76 . When the first switch assembly  72  is actuated, and if the first switch assembly  72  is able to apply a charge to the rotary solenoid  60 , the first switch assembly  72  actuates the rotary solenoid  60  causing the movable contact  20  to move into the second position and generating a noticeable feedback. If the user detects the noticeable feedback, the user is informed that the movable contact  20  is in the second position and the user stops actuating the first actuator  94 . Further, the rotating extension assembly return spring  116  returns the first actuator  94  to its first position.
 
     If, however, the first switch assembly  72  is not able to apply a charge to the rotary solenoid  60 , the first switch assembly  72  does not actuate the rotary solenoid  60  and there is no noticeable feedback. Thus, the user is informed that further actuation of the first actuator  94  is required. As such, the user continues to press the first actuator body medial portion user interface, i.e., button  103 , causing the first actuator body  100  to move over the first actuator body  100  path second portion. As detailed above, the linkage assembly  150  generates an increasing second bias that is applied to the first actuator body  100  and which is detectable to the user. As noted above, the second bias is greater than the first bias and the first bias is noticeably different from the second bias. Further, as also noted above, continued motion of the first actuator body  100  over the first actuator body  100  path second portion manually moves the movable contact  20  into the second position. When the movable contact  20  moves into the second position, the feedback force generated by the linkage assembly  150  which is applied to the first actuator body  100  decreases by an amount that is noticeably different from the second bias. Thus, by virtue of the change in the feedback force, the user is informed that the movable contact  20  has been moved into the second position. The user stops actuating the first actuator  94  and the rotating extension assembly return spring  116  returns the first actuator  94  to its first position. Thus, the multi-level feedback closing actuator assembly  52  is structured to, and does, move the movable contact  20  from the first position to the second position while providing different tactile feedback, i.e., feedback forces that are detectable by the user via the button  103 . 
     In an embodiment of the multi-level feedback actuator  50  that includes both a closing actuator assembly  52  and an opening actuator assembly  54 , the opening actuator assembly  54  includes a second actuator  96  as discussed above. The following description will use the term “second actuator”  94  but, it is understood that in an embodiment with only an opening actuator assembly  54 , this actuator would be identified as the “first” actuator. 
     In this embodiment, and in addition to the elements described above, the multi-level feedback actuator  50  includes the second actuator  96 , mentioned above, as well as a second switch assembly  1072 . The second actuator  96  includes an elongated body  1100  having a first end  1102 , a medial portion  1104 , and a second end  1106 . As shown, the second actuator body  1100  is an assembly including bodies  1100 A and  1100 B, but is, as used herein, identified as a single element. Further, while shown as having an elongated axle  1109 , discussed below, the second actuator body  1100  is, as used herein, “elongated” in the same direction as the first actuator body  100  as discussed above. Thus, the second actuator body  1100  rotates in a plane that is generally parallel to the plane of rotation of the first actuator body  100  as discussed above. 
     The second actuator body first end  1102  is structured to be, and is, rotatably coupled to the circuit breaker housing assembly  12 . In an exemplary embodiment, the second actuator body first end  1102  includes a rotational coupling  1108  such as, but not limited to, an axle  1109  that is structured to be, and is, coupled to the circuit breaker housing assembly  12 . That is, in an exemplary embodiment, the circuit breaker housing assembly  12  includes a circular passage (not numbered) that corresponds to the second actuator body second end axle  1109 . It is noted that in this configuration, the second actuator body  1100  moves, i.e., rotates, generally in a single plane. That is, the longitudinal axis of the second actuator body  1100  moves, i.e., rotates, generally in a plane which extends generally perpendicular to the second actuator body first end rotational coupling  1108  axis of rotation. The second actuator body medial portion  1104  defines a user interface such as, but not limited to, a button  1103 . In an exemplary embodiment, the second actuator body medial portion  1104  also includes a switch assembly interface  1107  which is shown as an extension  1105  that extends generally opposite the button  1103 . The second actuator body second end  1106  is structured to be, and is, operatively coupled to the linkage assembly  150 . Thus, the second actuator body second end  1106  is structured to, and does, operatively engage the linkage assembly  150 . That is, second actuator body  1100  is operatively coupled to the linkage assembly  150  and is structured to, and does, move at least one link  160 ,  170 ,  180 ,  190 . 
     The second actuator  96 , i.e., the multi-level feedback actuator assembly  50 , further includes a number of return springs  1101 . The multi-level feedback actuator assembly return springs  1101  are disposed between the second actuator body  1100  and the circuit breaker housing assembly  12 . The multi-level feedback actuator assembly return springs  1101  are structured to, and do, bias the second actuator body  1100  to a first position. 
     The second switch assembly  1072  is substantially similar to the first switch assembly  72  and, as such, will not be described in detail. It is noted that, as identified in the figures, the elements of the second switch assembly  1072  have the same reference numbers +1000. Thus, the second switch assembly  1072  includes a housing assembly  1074  and an actuator  1076 , i.e., a lever/button combination (neither shown). As is known, the second switch assembly conductors (e.g., wires, not numbered) are coupled to, and are in electric communication with, the rotary solenoid coil. The second switch assembly  1072  is structured to, and does, provide a charge/current with characteristics that cause the rotary solenoid output shaft  64  to rotate in a direction that is opposite the direction the rotary solenoid output shaft  64  rotates when a charge/current is applied by the first switch assembly  72 . Thus, when the second switch assembly  1072  is actuated, a charge/current is applied to the rotary solenoid coil and the rotary solenoid output shaft  64  moves between positions. That is, the second switch assembly  1072  is structured to, and does, hold a charge (or otherwise selectively allow a current to pass therethrough) that is sufficient to cause the rotary solenoid output shaft  64  to move between positions. The second switch assembly  1072  is coupled, directly coupled, or fixed to the circuit breaker housing assembly  12  in a position so that the second switch assembly actuator  1076  is disposed in the path of the second actuator body medial portion switch assembly interface  1107 . 
     The linkage assembly  150  is substantially the same as the linkage assembly  150  described above with the following exception. For the opening actuator assembly  54 , an edge surface of the shaft link body first end  164  is structured to be, and is, a second actuator interface  1169 . In an exemplary embodiment, the shaft link body second end first actuator interface  1169 , which is an edge surface, is disposed adjacent, or immediately adjacent, the cam assembly second cam member  204 . 
     The second actuator body  1100  is structured to be, and is, rotatably coupled to the circuit breaker housing assembly  12  and moves between an unactuated, first position and an actuated, second position as well as over a path having at least a first portion and a second portion. As indicated by the names, when the second actuator body  1100  is unactuated, the second actuator body  1100  is in the first position. When the second actuator body  1100  is fully actuated, it is in the second position. As used herein, the second actuator body  1100  path “first portion” and “second portion” are those portions of the second actuator body  1100  path wherein the second actuator body  1100  operatively engages different sets of elements of the multi-level feedback actuator assembly  50 . That is, as used herein, the second actuator body  1100  path “first portion” is that portion of the second actuator body  1100  path wherein the second actuator body  1100  operatively engages the second switch assembly  1072 , i.e., the switch assembly actuator  1076 . The second actuator body  1100  path “second portion” is that portion of the second actuator body  1100  path wherein the second actuator body  1100  operatively engages the linkage assembly  150  as well as the second switch assembly  1072 . When the second actuator body  1100  is at the end of the second actuator body  1100  path “second portion,” the second actuator body  1100  is in the second position. As with the first actuator body  100 , the second actuator body  1100  moves over a “null” portion of the path in some embodiments, i.e., an embodiment wherein the middle link body first end opening  185  is an elongated slot  185 A. 
     As before, the linkage assembly  150  is structured to, and does, apply at least a first bias to the second actuator body  1100  and a second bias to the second actuator body  1100 . Further, the first bias is noticeably different from the second bias. That is, the linkage assembly  150  is structured to apply the first bias to the second actuator body  1100  when the second actuator body  1100  is disposed in the second actuator body  1100  path first portion, and, the linkage assembly  150  is structured to, and does, apply the second bias to the second actuator body  1100  when the second actuator body  1100  is disposed in the second actuator body  1100  path second portion. 
     For an opening actuator assembly  54 , the multi-level feedback actuator assembly  50  operates as follows. Initially, it is noted that for the sake of this example using an opening actuator assembly  54 , it is assumed that the movable contact  20  is in the closed, second position and the operating mechanism  16  is in the corresponding second configuration, i.e., the crossbar  30  is in a second position. Further, the second actuator body  1100  is in an unactuated, first position. In this configuration, the cam assembly bias device  206  creates a line of force  1230  extending from a point of contact between the cam assembly first cam member  202  and the second cam member  204  through shaft link body first end coupling  161 . As shown in  FIG.  12   , the line of force  1230  is disposed on a “first” side of solenoid output shaft axis of rotation  65 . It is noted that the “first” side of the solenoid output shaft axis of rotation  65  for the second actuator  96  is different from the “first” side associated with the first actuator  94 , as described above. Further, in the initial, second position, the second actuator body second end  1106  is spaced from the linkage assembly  150 . 
     As a user engages the second actuator body medial portion user interface, i.e., button  1103 , the second actuator body  1100  rotates and moves over the second actuator body  1100  path first portion. As the second actuator body  1100  moves over the second actuator body  1100  path first portion, the second actuator body  1100 , and as shown, the second actuator body medial portion switch assembly interface  1107  engages, and actuates, the second switch assembly actuator  1076 . Thus, second actuator body  1100  is structured to, and does, operatively engage the second switch assembly actuator  1076  when the second actuator body  1100  is disposed in the second actuator body  1100  path first portion. As discussed above, following actuation of the second switch assembly actuator  1076 , the rotary solenoid  60  is actuated and moves the rotary solenoid output shaft  64  from a second position to a first position. Rotation of the rotary solenoid output shaft  64  causes the linkage assembly  150  to move from a second configuration to a first configuration which, in turn, causes the crossbar  30  (and other elements of the operating mechanism  16 ) to move from a second position/configuration to a first position/configuration. As discussed above, when the operating mechanism  16  moves from a second configuration to a first configuration, the movable contact  20  moves from the second position to the first position. That is, the movable contact  20  opens. 
     This is the normal operation of the electric actuator assembly  70 . That is, the electric actuator assembly  70  includes the second actuator  96 , the rotary solenoid  60 , and the second switch assembly  1072 . Further, as discussed below, actuating the electric actuator assembly  70  requires minimal force on the second actuator  96 . That is, the counter, or feedback, forces applied by the electric actuator assembly  70  are relatively low when compared to the feedback forces generated by the manual actuator assembly  80 , as discussed below. Thus, there is a first bias applied to the second actuator  96  as the second actuator  96  moves over the second actuator body  1100  path first portion. Further, if the electric actuator assembly  70  actuates the rotary solenoid  60 , there is a noticeable feedback, as described above. Thus, if a user detects the rotary solenoid  60  noticeable feedback, the user is informed that the electric actuator assembly  70  has moved the movable contact  20  from the second position to the first position and the user stops pressing on the second actuator body medial portion user interface, i.e., button  1103 . 
     If the electric actuator assembly  70  is not able to move the movable contact  20  from the second position to the first position, e.g., if the second switch assembly  1072  is not able to provide a charge to the rotary solenoid  60 , then the user must utilize the manual actuator assembly  80  to move the movable contact  20  from the second position to the first position. This is accomplished by continuing to press on the second actuator body medial portion user interface, i.e., button  1103 . 
     That is, as the user continues to press on the second actuator body medial portion user interface, i.e., button  1103 , the second actuator body  1100  moves into the second actuator body  1100  path second portion. As the second actuator body  1100  moves into the second actuator body  1100  path second portion, the second actuator body  1100  engages the linkage assembly  150 . That is, the second actuator body second end  1106  engages the shaft link body first end second actuator interface  1169 . This bias causes the shaft link  160  to rotate. Thus, the second actuator body  1100  is structured to, and does, operatively engage the linkage assembly  150  when the second actuator body  1100  is disposed in the second actuator body  1100  path second portion. As noted above, the shaft link  160  is operatively coupled to the rotary solenoid output shaft  64 , thus, rotation of the shaft link  160  causes the rotary solenoid output shaft  64  to rotate from a second position to a first position and generates a noticeable feedback. Further, as described above, rotation of the rotary solenoid output shaft  64  causes the operating mechanism  16 , and therefore the movable contact  20 , to move into their first positions/configurations. 
     In general, the linkage assembly  150  provides a counter, or feedback, bias/force to the second actuator body  1100 . In an exemplary embodiment, the bias the linkage assembly  150  provides to the second actuator body  1100  while the second actuator body  1100  is in the second actuator body  1100  path first portion is less than the bias the linkage assembly  150  provides to the second actuator body  1100  while the second actuator body  1100  is in the second actuator body  1100  path second portion. This is accomplished, at least in part, by the forces generated in the cam assembly  200 . 
     That is, as noted above, the cam assembly bias device  206  creates a line of force  1230  extending from a point of contact between the cam assembly first cam member  202  and the second cam member  204  through shaft link body first end coupling  161 . Initially, i.e., when the second actuator body  1100  is disposed in the second actuator body  1100  path first portion, the line of force  1230  extends to a “first side” of the solenoid output shaft axis of rotation  65 . As the rotary solenoid output shaft  64  and the shaft link  160  move/rotate from a second position to a first position and when the second actuator body  1100  is disposed in the second actuator body  1100  path second portion, the line of force  1230  extends to a “second side” of the solenoid output shaft axis of rotation  65 . In this configuration, the counter, or feedback, forces applied by the linkage assembly  150  on the second actuator body  1100  are initially low (when compared to the higher forces, discussed below) when the second actuator body  1100  is disposed in the second actuator body  1100  path first portion. As the second actuator body  1100  moves into the second actuator body  1100  path second portion, the counter, or feedback, forces applied by the linkage assembly  150  on the second actuator body  1100  increase until the line of force  1230  passes over the solenoid output shaft axis of rotation  65 . After the line of force  1230  passes over the solenoid output shaft axis of rotation  65 , the counter, or feedback, forces applied by the linkage assembly  150  on the second actuator body  1100  rapidly decrease to nothing or a negligible amount. Thus, the combination of the linkage assembly  150  and the cam assembly  200  produce a feedback, or response, similar to a toggle. A specific example of the counter, or feedback, forces is shown below. 
     That is, as shown in  FIGS.  12 - 14   , during the use of the opening actuator assembly  54 , the second actuator  96  is in its first position and the line of force  1230  is disposed on the first side of the solenoid output shaft axis of rotation  65  ( FIG.  12   ). As a user actuates the second actuator  96  (which in this example is the actuator associated with the opening actuator assembly  54 ), the linkage assembly  150  causes the line of force  1230  to move. That is, the motion of the opening actuator assembly  54  cause the linkage assembly  150  elements to move. The motion of the linkage assembly  150  causes the location of the line of force  1230  to move. 
     As the second actuator  96  moves over the second actuator body  1100  path first portion, the line of force  1230  remains on the first side of the solenoid output shaft axis of rotation  65 . Further, force applied to the first actuator body medial portion user interface, i.e., button  103 , is relatively low compared to a latter force applied as discussed below. Similarly, the force the linkage assembly  150  applies to the rotary solenoid output shaft  64  is relatively low compared to latter forces applied to the rotary solenoid output shaft  64 . As the second actuator  96  moves over the second actuator body  1100  path first portion, the motion of the linkage assembly  150  has a negligible effect on the crossbar  30 . That is, in an exemplary embodiment wherein the middle link body first end opening  185  is an elongated slot  185 A, the initial motion of the second actuator  96  is not transferred to the crossbar  30  via the linkage assembly  150  because the motion of shaft link  160  is not transferred to middle link  180  until the pin coupling links  160 ,  180  moves to the end of elongated slot  185 A. 
     As the user continues to press the second actuator  96 , the counter forces generated by the multi-level feedback actuator assembly  50  continue to increase. That is, as the second actuator  96  moves into, and over, the second actuator body  1100  path second portion, the counter forces increase and are noticeably different from the counter forces generated by the multi-level feedback actuator assembly  50  when the second actuator body  1100  is in the second actuator body  1100  path first portion. Further, the motion of the linkage assembly  150  starts to noticeably effect the crossbar  30 . That is, when the crossbar  30  rotates and moves the movable contact  20  toward the first position, the feedback forces generated on the second actuator  96  by the linkage assembly  150  are almost double the feedback forces generated on the second actuator  96  when the second actuator body  1100  is in the second actuator body  1100  path first portion. 
     Moreover, as the second actuator  96  moves into, and over, the second actuator body  1100  path second portion, the line of force  1230  remains on the first side of the solenoid output shaft axis of rotation  65 . As the crossbar starts to move the movable contact  20 , the line of force  1230  crosses over to the second side of the solenoid output shaft axis of rotation  65 . The configuration of the linkage assembly  150  as the line of force  1230  crosses over the solenoid output shaft axis of rotation  65  is identified herein as the “toggle.” Thus, as shown in the chart below, when the linkage assembly  150  passes over the toggle configuration, the feedback forces generated on the second actuator  96  by the linkage assembly  150  are noticeably different when compared to the feedback forces generated on the second actuator  96  by the linkage assembly  150  when the line of force  1230  is on the first side of the solenoid output shaft axis of rotation  65 . At this point in the actuation process, the movable contact has moved into the first position. That is, the contacts  20 ,  22  are open. 
     Further, the opening actuator assembly  54 , in an exemplary embodiment, includes a “force leveling assembly”  1300 . As used herein, a “force leveling assembly” is a construct that is structured to change a characteristic of one actuator assembly to substantially resemble a similar characteristic of another actuator assembly. With the closing actuator assembly  52  and the opening actuator assembly  54  configured as described above, the biases, i.e., both the first and second bias, associated with the closing actuator assembly  52  are different than the biases, i.e., both the first and second bias, associated with the opening actuator assembly  54 . As noted above, however, users prefer complimentary actuators, e.g., open and close actuators, have substantially the same tactile feedback, i.e., the same biases. Further, and due to the geometry, position, and other aspects of the elements of the closing actuator assembly  52 , the closing actuator assembly  52  biases are greater than the biases of the opening actuator assembly  54 . Thus, the opening actuator assembly  54  includes a “force leveling assembly”  1300 . 
     In an exemplary embodiment, the multi-level feedback actuator assembly return springs  1101  are structured to, and do, act as the force leveling assembly  1300 . That is, the multi-level feedback actuator assembly return springs  1101  increase the biases on the second actuator body  1100 . That is, the multi-level feedback actuator assembly return springs  1101  increase both the first bias applied to the second actuator body  1100  and the second bias applied to the second actuator body  1100  by the linkage assembly  150 . Moreover, the multi-level feedback actuator assembly return springs  1101  are structured to increase the bias so that both the first bias and the second bias applied to the second actuator body  1100  by the linkage assembly  150  are substantially the same as the he first bias and the second bias applied to the first actuator body  100  by the linkage assembly  150 . In this configuration, the force leveling assembly  1300  solves the problem(s) noted above. 
     In an exemplary embodiment, the multi-level feedback actuator assembly  50  has the characteristics shown in the following chart. 
     
       
         
           
               
               
               
               
             
               
                   
               
               
                 Open 
                 lbs of  
                   
                 in/lbs torque 
               
               
                 button 
                 force to 
                   
                 needed by the 
               
               
                 degrees 
                 press the 
                   
                 solenoid to open 
               
               
                 pressed 
                 button 
                 description 
                 (2 in/lbs) 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
            
               
                 0 
                 1.55 
                 Button not pressed and fully closed 
                 0.05 
               
               
                 1.05 
                 1.96 
                 switch activated and solenoid trying  
                 0.00 
               
               
                   
                   
                 to open from internal spring 
                   
               
               
                 3.3 
                 3.33 
                 lever starting to move the crossbar 
                 0.20 
               
               
                   
               
            
           
         
       
     
     Thus, in general, as a user begins to actuate the second actuator body medial portion user interface, i.e., button  1103 , there is initially a minimal feedback as the second actuator body  1100  moves over the null portion of the path (if the null portion exists) as well as the second actuator body  1100  path first portion. During this time, the linkage assembly  150  applies a first bias to the second actuator body  1100  which is detectable by the user. As the second actuator body  1100  moves over the second actuator body  1100  path first portion, the second actuator body  1100  actuates the second switch assembly  1072 . That is, the second actuator body  1100  actuates the second switch assembly actuator  1076 . When the second switch assembly  1072  is actuated, and if the second switch assembly  1072  is able to apply a charge to the rotary solenoid  60 , the second switch assembly  1072  actuates the rotary solenoid  60  causing the movable contact  20  to move into the first position and generating a noticeable feedback. If the user detects the noticeable feedback, the user is informed that the movable contact  20  is in the first position and the user stops actuating the second actuator  96 . 
     If, however, the second switch assembly  1072  is not able to apply a charge to the rotary solenoid  60 , the second switch assembly  1072  does not actuate the rotary solenoid  60  and there is no noticeable feedback. Thus, the user is informed that further actuation of the second actuator  96  is required. As such, the user continues to press the second actuator body medial portion user interface, i.e., button  1103 , causing the second actuator body  1100  to move over the second actuator body  1100  path second portion. As detailed above, the linkage assembly  150  generates an increasing second bias that is applied to the second actuator body  1100  and which is detectable to the user. As noted above, the second bias is greater than the first bias and the first bias is noticeably different from the second bias. Further, as also noted above, continued motion of the second actuator body  1100  over the second actuator body  1100  path second portion manually moves the movable contact  20  into the first position. When the movable contact  20  moves into the first position, the feedback force generated by the linkage assembly  150  which is applied to the second actuator body  1100  decreases by an amount that is noticeably different from the second bias. Thus, by virtue of the change in the feedback force, the user is informed that the movable contact  20  has been moved into the first position. The user stops actuating the second actuator  96  and the multi-level feedback actuator assembly return springs  1101  returns the second actuator  96  to its first position. Thus, the multi-level feedback closing actuator assembly  52  is structured to, and does, move the movable contact  20  from the second position to the first position while providing different tactile feedback, i.e., feedback forces that are detectable by the user via the button  1103 . 
     Further, in an exemplary embodiment, the opening actuator assembly  54  is structured to be an under voltage regulator. In this embodiment, the cam assembly  200 , i.e., the cam assembly bias device  206  generates sufficient bias to move the rotary solenoid output shaft  64  from the second position to the first position. That is, the cam assembly  200  is structured to, and does, apply an opening bias to the operating mechanism crossbar  30  via the linkage assembly  150 . When the rotary solenoid  60  is drawing the proportional current from the circuit breaker assembly  10  use current, the rotary solenoid  60  generates a bias that is sufficient to match or, in an exemplary embodiment, slightly overcome the bias generated by the cam assembly  200 . That is, the cam assembly  200  opening bias is substantially equal to, or less than, the rotary solenoid  60  closing bias. In this configuration, the rotary solenoid  60  is structured to, and does, apply a closing bias to the operating mechanism crossbar  30  when drawing the proportional current from the circuit breaker assembly  10  use current. Thus, when the use current, and therefore the proportional current, falls below a selected minimum current, the rotary solenoid  60  closing bias is reduced and the cam assembly  200  is structured to, and does, operatively engage the operating mechanism crossbar  30  and moves the operating mechanism crossbar to the first position. This, in turn, causes the movable contact  20  to move to the open, first position. Thus, the opening actuator assembly  54  is structured to be an under voltage regulator. 
     In an exemplary embodiment, the circuit breaker assembly  10  also includes an interlock system  500 . As discussed below, the interlock system  500  includes a number of elements identified above and, in certain embodiments, additional elements as identified below which are collectively identified as an interlock assembly  510 . The interlock system  500 , or the interlock assembly  510 , is structured to, and does, maintain the multi-level feedback actuator assembly  50 , and elements thereof, in a “safe configuration.” As used herein, a “safe configuration” means one or more of the following configurations:
         1. The elements of the multi-level feedback actuator assembly  50  are configured so that any/all primary actuators  90 ,  92  are de-operatively coupled from the rotary solenoid  60  when there is an overcurrent condition upon closing, i.e., when the movable contact  20  moves to the second position and the trip assembly  18  detects an over-current condition upon the movable contact  20  reaching the second position.   2. The elements of the multi-level feedback actuator assembly  50  are configured so that the closing actuator assembly  52  (or elements thereof) are rendered ineffective when the opening actuator assembly  54  is actuated.   3. The elements of the multi-level feedback actuator assembly  50  are configured so that the closing actuator assembly  52  (or elements thereof) are rendered ineffective when the movable contact(s) is/are in the second position.
 
As used herein, “de-operatively coupled” means that elements that are, in one configuration, operatively coupled to each other, are reconfigured so that the elements are no longer operatively coupled to each other. It is understood that to be “de-operatively coupled” (or when elements are disposed in a “de-operatively coupled” configuration) means that the elements are temporarily “de-operatively coupled” (or temporarily disposed in a “de-operatively coupled” configuration).
       

     As used herein, to be “rendered ineffective” means that elements that are either “de-operatively coupled” or that at least one of the operatively coupled elements is prevented from moving between positions/configurations. 
     In an exemplary embodiment, the interlock system  500  utilizes elements discussed above so as to be in a “safe configuration.” For example, to be in the first “safe configuration” identified above, the interlock system  500 , or the interlock assembly  510 , includes, or operates in conjunction with, the rotary solenoid  60 , the linkage assembly  150  (and in an exemplary embodiment, the shaft link  160 ) and the first actuator  94  (and in an exemplary embodiment, the first actuator body  100  and/or the rotating extension assembly  110 ), as discussed below. 
     In this embodiment, these elements are configured as discussed above and operate as discussed below. Initially, however, it is noted that the rotary solenoid  60  is structured to be, and is, in one of an energized state or a de-energized state. When the rotary solenoid  60  is in the energized state, the rotary solenoid output shaft  64  is structured to, and does, operatively engage elements to which the rotary solenoid output shaft  64  is operatively coupled. Conversely, when the rotary solenoid  60  is in the de-energized state, the rotary solenoid output shaft  64  is structured to be, and is, operatively engaged by elements operatively coupled to the rotary solenoid output shaft  64 . As described above, the shaft link  160  is fixed to the rotary solenoid output shaft  64 . Thus, in this configuration, and as used herein, the shaft link  160  is an element “to which the rotary solenoid output shaft  64  is operatively coupled,” and, the shaft link  160  is an element “operatively coupled to the rotary solenoid output shaft  64 .” That is, any motion imparted to the rotary solenoid output shaft  64  is also imparted to the shaft link  160  and, conversely, any motion imparted to the shaft link  160  is also imparted to the rotary solenoid output shaft  64 . 
     Further, as discussed above, the circuit breaker assembly  10  includes a trip assembly  18 . The trip assembly  18  is structured to, and does, generate an overcurrent signal when an overcurrent condition is detected. The trip assembly  18  is in electronic communication with the rotary solenoid  60 . The rotary solenoid  60  is structured to, and does, receive the overcurrent signal from the trip assembly  18 . When the rotary solenoid  60  receives the overcurrent signal from the trip assembly  18 , the rotary solenoid  60  is structured to, and does, switch from the de-energized state to the energized state and moves the rotary solenoid output shaft  64  to the first position. Thus, generally, when the rotary solenoid  60  receives the overcurrent signal from the trip assembly  18 , the rotary solenoid  60  is structured to, and does, move each movable contact  20  to the open, first position. 
     As described above, the first actuator body  100  moves and therefore, as defined above, the first actuator body  100  has a path of travel. It is further noted that all elements/portions of the first actuator body  100  also move and therefore, as defined above, have a path of travel. As further discussed above, the first actuator body  100 , and more specifically, the first actuator body second end  106  operatively engages the linkage assembly  150 /the shaft link  160 . As part of the interlock system  500 , or the interlock assembly  510 , the rotating extension assembly  110  is selectively operatively coupled to the linkage assembly  150 /the shaft link  160 . 
     That is, as noted above, the rotating extension assembly  110  is rotatably coupled to the first actuator body second end  106 . In this configuration, the rotating extension assembly  110  is structured to move between a first position, as is shown in  FIG.  19   , and a second position, as is shown in  FIG.  20   . In the first position, the rotating extension assembly  110  is structured to, and does, operatively engage the shaft link  160 . In the second position the rotating extension assembly  110  is structured to not, and does not, operatively engage the shaft link  160 . Moreover, as noted above, the rotating extension assembly  110  includes a rotating extension assembly return spring  116 . In an exemplary embodiment, the rotating extension assembly return spring  116  has a bias, i.e., a spring force that is structured to, and does, maintain the rotating extension assembly  110  in the first position when the rotating extension assembly  110  is not exposed to an “effective counter force.” As used herein, the reactive force created by the rotating extension assembly  110 , i.e., the first actuator body  100 , engaging another element is not as used herein an “effective counter force.” As used herein, a force generated by another construct such as, but not limited to, the rotary solenoid  60  is an “effective counter force.” 
     Thus, when the rotary solenoid  60 , the linkage assembly  150  (and in an exemplary embodiment, the shaft link  160 ) and the first actuator  94  (and in an exemplary embodiment, the first actuator body  100  and/or the rotating extension assembly  110 ) are configured as described above, the interlock system  500 , or the interlock assembly  510  operates as follows. 
     It is understood that the movable contact  20  is initially in the first position, the rotary solenoid  60  is in the de-energized state and the rotating extension assembly  110  is in the first position. When there is not an overcurrent condition and when a user actuates the closing actuator assembly  52 , the multi-level feedback actuator  50  operates as described above and the movable contact  20  is moved to the closed, second position. If, however, at the time the closing actuator assembly  52  is actuated an overcurrent condition exists, the interlock system  500 , or the interlock assembly  510 , configures the primary first actuator  90  in a safe configuration. 
     That is, if an overcurrent condition exists at the time at which the closing actuator assembly  52  is actuated, the interlock system  500 , or the interlock assembly  510 , operates as follows. As the movable contact  20  moves into the second position, the trip assembly  18  detects the overcurrent condition and generates an overcurrent signal. The overcurrent signal is communicated to the rotary solenoid  60 . When the rotary solenoid  60  receives the overcurrent signal, the rotary solenoid  60  moves to the energized state and moves the rotary solenoid output shaft  64  to the second position. As the rotary solenoid output shaft  64  is operatively coupled to the shaft link  160 , the shaft link  160  moves, i.e., rotates, as well. The shaft link  160  is structured to be, and is, operatively coupled to the rotating extension assembly  110 . Thus, the rotating shaft link  160  generates an effective counter force sufficient to overcome the bias of the rotating extension assembly return spring  116 . Thus, the rotating extension assembly  110  moves to the second position of  FIG.  20   . In this position, the rotating extension assembly  110 , and therefore the first actuator body  100 , i.e., the primary first actuator  90 , is de-operatively coupled from the rotary solenoid  60 . Thus, the interlock system  500 , or the interlock assembly  510  is structured to, and does, de-operatively couple the primary first actuator  90  from the rotary solenoid  60  when the movable contact  20  moves to the second position and the trip assembly  18  detects an over-current condition upon the movable contact  20  reaching the second position. This is the first “safe configuration” identified above. Thus, in this configuration, the interlock system  500 , or the interlock assembly  510  is structured to, and does, configure the rotary solenoid  60  and the primary first actuator  90  in a safe configuration. The movable contact  20  then is returned to its first position, as in  FIG.  21   . 
     Stated alternately, when the rotary solenoid  60  is in the de-energized state, when the rotating extension assembly  110  is in the first position, and, when the first actuator body  100  moves over the path of travel, the rotating extension assembly  110  operatively engages the shaft link body  162  and the rotary solenoid output shaft  64 . Conversely, when there is an overcurrent condition, the rotary solenoid  60  is in the energized state and moving toward the first position, the shaft link body  162  operatively engages the rotating extension assembly  110  and moves the rotating extension assembly  110  to the second position of  FIG.  20   . As noted above, in this configuration, these elements of the interlock system  500 , or the interlock assembly  510  configure the rotary solenoid  60  and the primary first actuator  90  in a safe configuration. 
     To be in the second “safe configuration” identified above, the interlock system  500 , or the interlock assembly  510 , includes, or operates in conjunction with, the rotary solenoid  60 , the linkage assembly  150  (and in an exemplary embodiment, the shaft link  160 ), the first actuator  94  (and in an exemplary embodiment, the first actuator body  100  and/or the rotating extension assembly  110 ), the second actuator  96  (and in an exemplary embodiment, the second actuator body  1100 ), and an interlock unit  600 , as discussed below. 
     In this embodiment, the elements of the multi-level feedback actuator assembly  50  are configured so that the closing actuator assembly  52  (or elements thereof) are rendered ineffective when the opening actuator assembly  54  is actuated. Thus, there are two configurations of the multi-level feedback actuator assembly  50  wherein the interlock system  500 /interlock assembly  510  must maintain the multi-level feedback actuator assembly  50 , and elements thereof, in a “safe configuration.” In a first configuration, the opening actuator assembly  54  is actuated first followed by the closing actuator assembly  52 . In a second configuration, the closing actuator assembly  52  is actuated first followed by the opening actuator assembly  54 . 
     To address the first configuration, wherein the opening actuator assembly  54  is actuated first followed by the closing actuator assembly  52 , the interlock system  500 /interlock assembly  510  utilizes the interlock unit  600 . The interlock unit  600  is structured to move between a first configuration, wherein the interlock unit  600  does not block movement of the first actuator body  100 , and, a second configuration, wherein the interlock unit  600  blocks movement of the first actuator body  100 . As used herein, to “block movement” means to substantially prevent an element from moving. Further, second actuator body  1100  is operatively coupled to the interlock unit  600 . That is, the second actuator body  1100  and the interlock unit  600  are coupled so that when the second actuator body  1100  is in its first position, the interlock unit  600  is in its first configuration, and, when the second actuator body  1100  is in its second position, the interlock unit  600  is in its second configuration. Thus, generally, when the second actuator body  1100  is in its unactuated, first position, the interlock unit  600  is in its first configuration and the first actuator body  100  is free to move between positions, and, when the second actuator body  1100  is in its actuated, second position, the interlock unit  600  is in its second configuration and the first actuator body  100  is blocked from moving between positions. 
     In an exemplary embodiment, the interlock unit  600  includes a spring lever mounting  602 , an interlock unit spring lever  604 , a reversing lever  606 , a blocking member  608 , and a blocking member spring  610 . The interlock unit spring lever mounting  602  includes a body  620  that is structured to be coupled, directly coupled, or fixed to the second actuator body first end  1102 . As shown in  FIG.  4 A , the second actuator body first end  1102  in an exemplary embodiment is an elongated cylinder. Thus, in this embodiment, the interlock unit spring lever mounting body  620  is a generally toroid body structured to be disposed about the second actuator body first end  1102 . In an exemplary embodiment, the second actuator body first end  1102  does not define a full cylinder. That is, the second actuator body first end  1102  includes a cutout whereby the second actuator body first end  1102  does not have a substantially circular cross-section, i.e., the second actuator body first end  1102  is non-circular. In this embodiment, the inner surface of the generally toroid interlock unit spring lever mounting body  620  substantially corresponds to the non-circular shape of the second actuator body first end  1102 . Thus, when the interlock unit spring lever mounting body  620  is coupled to the second actuator body first end  1102 , the interlock unit spring lever mounting body  620  moves with the second actuator body first end  1102 . That is, the interlock unit spring lever mounting body  620  is fixed to the second actuator body first end  1102  and moves therewith. That is, it is understood that, and as used herein, when elements are “fixed” to each other, those elements move at the same time. 
     The interlock unit spring lever  604  includes an elongated body  630  having a first end  632  and a second end  634 . The interlock unit spring lever body first end  632  is structured to be, and is, coupled, directly coupled, or fixed to the interlock unit spring lever mounting body  620 . In an exemplary embodiment, wherein the interlock unit spring lever mounting body  620  is generally toroidal, the interlock unit spring lever body first end  632  is a coil  633  that is structured to be, and is, fixed to the interlock unit spring lever mounting body  620 . The interlock unit spring lever body second end  634  is structured to be, and is, operatively coupled to the interlock unit reversing lever  606 . 
     In an exemplary embodiment, the interlock unit reversing lever  606  includes a body  640  defining a rotational coupling  642 , a first radial extension  644  and a second radial extension  646 . As shown, the interlock unit reversing lever body  640  includes a toroidal portion (not numbered) which is the interlock unit reversing lever body rotational coupling  642 . The interlock unit reversing lever body rotational coupling  642  is structured to be, and is, rotatably coupled to the circuit breaker housing assembly  12 . The interlock unit reversing lever body first and second radial extensions  644 ,  646  extend generally radially relative to the center of the interlock unit reversing lever body rotational coupling  642 . The interlock unit reversing lever body first radial extension  644  is structured to be, and is, operatively engaged by the interlock unit spring lever  604 . That is, the interlock unit spring lever body second end  634  is operatively coupled to the interlock unit reversing lever body first radial extension  644 . Thus, the interlock unit spring lever  604  is operatively coupled to the interlock unit reversing lever  606 . The interlock unit reversing lever body second radial extension  646  is structured to be, and is, operatively coupled to the interlock unit blocking member  608 . The interlock unit reversing lever body  640 , i.e., the interlock unit reversing lever  606  is structured to, and does, move between a first position, as in  FIG.  17   , wherein the interlock unit reversing lever body  640  does not operatively engage the blocking member  608 , and, a second position, as in  FIG.  18   , wherein the interlock unit reversing lever body  640  operatively engages the blocking member  608 . 
     The interlock unit blocking member  608  includes body  650  a defining a rotational coupling  652 , a first radial extension  654  and a blocking lug  656 . As shown, the blocking member body  650  includes a toroidal portion (not numbered) which is the interlock unit blocking member body rotational coupling  652 . In an exemplary embodiment, the circuit breaker housing assembly  12  includes an axle (not numbered) to which the blocking member body  650  is rotatably coupled. The interlock unit blocking member body rotational coupling  652  is structured to be, and is, rotatably coupled to the circuit breaker housing assembly  12 . The interlock unit blocking member body first radial extension  654  is structured to be, and is, operatively engaged by the interlock unit reversing lever body second radial extension  646 . That is, the interlock unit reversing lever body second radial extension  646  is operatively coupled to the interlock unit blocking member body first radial extension  654 . The interlock unit blocking member body blocking lug  656  is a radial extension structured to be selectively disposed in the path of the first actuator body  100 , i.e., the primary first actuator  90 /first actuator  94 . The blocking member body  650 , i.e., the blocking member  608 , is structured to, and does, move between a first position as in  FIG.  17    wherein the interlock unit blocking member body blocking lug  656  is not disposed in the path of the first actuator body  100 , and, a second position as in  FIG.  18    wherein the interlock unit blocking member body blocking lug  656  is disposed in the path of the first actuator body  100 . 
     In an exemplary embodiment, the interlock unit blocking member spring  610  is coupled, directly coupled, or fixed to the circuit breaker housing assembly  12  adjacent the interlock unit blocking member body  650 . The interlock unit blocking member spring  610  is operatively coupled to the interlock unit blocking member body  650  and is structured to, and does, bias the interlock unit blocking member body  650  to its first position. That is, when the interlock unit blocking member body  650  is in the second position, the interlock unit blocking member spring  610  biases the interlock unit blocking member body  650  to the first position. When the interlock unit blocking member body  650  is in its first position, the interlock unit blocking member spring  610  does not bias, or applies a negligible bias to, the interlock unit blocking member body  650 . 
     In an exemplary embodiment, the first actuator body  100  defines a blocking member cavity  658  ( FIG.  17   ) that is sized and shaped to generally correspond to the interlock unit blocking member body blocking lug  656  (or which is larger than the interlock unit blocking member body blocking lug  656 ). When the blocking member body  650  is in the first position, the first actuator body blocking member cavity  658  is aligned with the interlock unit blocking member body blocking lug  656 . That is, as used herein, and with respect to a blocking member cavity  658 , “aligned” means that as the body which defines the blocking member cavity  658  moves, the blocking member cavity  658  moves over the associated blocking member, i.e., the interlock unit blocking member body blocking lug  656 . Thus, as used herein, a blocking member that is aligned with a cavity sized and shaped to accommodate that blocking member is not “in the path of” a construct that defines the cavity. Conversely, when a blocking member is not aligned with a cavity sized and shaped to accommodate that blocking member then the blocking member is “in the path of” construct that defines the cavity. 
     Thus, when the second actuator body  1100  is in the first position, the interlock unit  600  is in its first configuration with the blocking member body  650  in the first position. Further, when the blocking member body  650  is in the first position and when the first actuator body  100  moves from the first position toward the second position, the first actuator body blocking member cavity  658  moves to generally enclose and receive therein the interlock unit blocking member body blocking lug  656 . That is, the interlock unit blocking member body blocking lug  656 , i.e., the interlock unit  600 , is not in the path of the first actuator body  100  and therefore does not block the movement of the first actuator body  100 . 
     Conversely, when the second actuator body  1100  is in the second position, the interlock unit  600  is in its second configuration with the blocking member body  650  in the second position. Further, when the blocking member body  650  is in the second position and when the first actuator body  100  moves from the first position toward the second position, the first actuator body blocking member cavity  658  is not aligned with the interlock unit blocking member body blocking lug  656 . Thus, the interlock unit blocking member body blocking lug  656 , i.e., the interlock unit  600 , is in the path of the first actuator body  100  and blocks the movement of the first actuator body  100 . 
     Alternatively, the interlock system  500 /interlock assembly  510  is structured to render the closing actuator assembly  52 , i.e., the first actuator body  100 , ineffective when the first actuator body  100  is in the second position and the opening actuator assembly  54 , i.e., the second actuator body  1100 , is actuated. In this embodiment, the interlock system  500 /interlock assembly  510  operates in a manner similar to the embodiment described above with respect to the first “safe configuration.” In this embodiment, however, rather than the rotary solenoid  60  providing the effective counter force, the opening actuator assembly  54 , i.e., the second actuator body  1100 , provides the effective counter force. That is, the second actuator body  1100  is structured to, and does, apply an effective counter force to the rotating extension assembly  110  via the shaft link  160 . It is understood that the force is created by a user, but that the force is transmitted, and therefore, and as used herein, “applied,” by the second actuator body  1100 . 
     Thus, the multi-level feedback actuator assembly  50  is configured as described above. Notably, the first actuator body  100  includes the rotating extension assembly  110 . Further, it is noted that the second actuator body  1100  is operatively coupled to the shaft link  160 , the shaft link  160  is operatively coupled to the rotary solenoid output shaft  64  as well as the first actuator body  100 . Further, it is assumed that the closing actuator assembly  52 , i.e., the first actuator body  100 , is in the second position. That is, the first actuator body  100  is in the second positon and the first actuator body second end  106  has engaged the shaft link body second end first actuator interface  169 . Thus, the shaft link  160  and the rotary solenoid output shaft  64  are in their second positions. With the multi-level feedback actuator assembly  50  in this configuration, the interlock system  500 , or the interlock assembly  510 , operates as follows. 
     As described above, when a user actuates the second actuator body  1100 , e.g., by engaging the second actuator body medial portion user interface, i.e., button  1103 , the second actuator body  1100  moves from the first position to the second position. As the second actuator body  1100  moves into the second actuator body  1100  path second portion, as described above, the second actuator body  1100  engages the linkage assembly  150 . That is, the second actuator body second end  1106  engages the shaft link body first end second actuator interface  1169 . This bias causes the shaft link  160  to rotate. 
     As described above, the shaft link  160  includes laminations  160 A,  160 B,  160 C,  160 D,  160 E,  160 F. As shown in  FIG.  4 A , the first actuator body  100  is operatively coupled to selected laminations  160 D,  160 E,  160 F on one side of the rotary solenoid  60 . Conversely, the second actuator body  1100  is operatively coupled to selected laminations  160 A,  160 B,  160 C on the other side of the rotary solenoid  60 . All shaft link laminations  160 A,  160 B,  160 C,  160 D,  160 E,  160 F, however, move together as all shaft link laminations  160 A,  160 B,  160 C,  160 D,  160 E,  160 F are operatively coupled to the rotary solenoid output shaft  64 . Stated alternately, all shaft link laminations  160 A,  160 B,  160 C,  160 D,  160 E,  160 F are fixed, directly or indirectly, to the rotary solenoid output shaft  64 . Thus, the bias applied to the shaft link  160  by the second actuator body  1100  is further applied via the shaft link  160  to the first actuator body  100 . This bias acts as an effective counter force, as defined above. 
     Thus, just as in the embodiment discussed above, the application of an effective counter force overcomes the bias of the rotating extension assembly return spring  116 . Thus, the rotating extension assembly  110  moves to its second position. In this position, the rotating extension assembly  110 , and therefore the first actuator body  100 , i.e., the first primary actuator  90 , is de-operatively coupled from the rotary solenoid  60 . Stated alternately, when the second actuator body  1100  moves to its second position, the shaft link body  160  operatively engages the rotating extension assembly  110  and moves the rotating extension assembly  110  to its second position. That is, the closing actuator assembly  52  (or elements thereof; namely, the first actuator body  100 ) are rendered ineffective when the opening actuator assembly  54  is actuated. Thus, the multi-level feedback actuator assembly  50 , and elements thereof, are in a “safe configuration.” 
     To be in the third “safe configuration” identified above, the interlock system  500 , or the interlock assembly  510 , includes, or operates in conjunction with, the flag  130  and the interlock unit  600  as described above. In this embodiment, the flag  130  is rotatably coupled to the circuit breaker housing assembly  12  adjacent the interlock unit blocking member spring  610 . That is, the flag body  132  includes a spring mounting  134 . The flag body spring mounting  134  moves with, i.e., rotates with, the flag body  132 . Further, the flag  130  is operatively coupled to the interlock unit blocking member spring  610 . 
     The interlock unit blocking member spring  610  is operatively coupled to the interlock unit blocking member body  650 . That is, in this embodiment, the interlock unit blocking member spring  610  is fixed to the flag body spring mounting  134 . Thus, the interlock unit blocking member spring  610  moves between two positions corresponding to the flag  130  positions. The interlock unit blocking member spring  610  positions include a first position, wherein the interlock unit blocking member spring  610  does not operatively engage the interlock unit blocking member body  650 , and, a second position, wherein the interlock unit blocking member spring  610  operatively engages the interlock unit blocking member body  650  and moves the interlock unit blocking member body  650  to the second position. 
     That is, generally, the interlock unit blocking member spring  610  is mounted on the flag  130  and moves therewith. Thus, when the flag  130  is in its first position, i.e., when the crossbar  30 /movable contacts  20  are in their (open) first positions, the interlock unit blocking member spring  610  maintains, or biases, the interlock unit blocking member body  650  to its first position wherein the interlock unit blocking member body blocking lug  656  is not disposed in the path of the first actuator body  100 . Conversely, when the flag  130  is in its second position, i.e., when the crossbar  30 /movable contacts  20  are in their (closed) second positions, the interlock unit blocking member spring  610  maintains, or biases, the interlock unit blocking member body  650  to its second position wherein the interlock unit blocking member body blocking lug  656  is disposed in the path of the first actuator body  100 . It is understood that in this configuration, the interlock unit blocking member spring  610  only biases the interlock unit blocking member body  650  to its first position when the flag  130  is in its first position. 
     Thus, when the flag body  132  is in the first position, i.e., when the movable contacts  20  are in the open, first position, the interlock unit blocking member spring  610  maintains the interlock unit blocking member body  650  in its first position. As described above, when the interlock unit blocking member body  650  in its first position, the closing actuator assembly  52 , i.e., the first actuator  100 , is free to move. That is, when the movable contacts  20  are in the open, first position, a user is able to actuate the closing actuator assembly  52  so as to move the movable contacts  20  to the closed, second position, as described above. Conversely, when the flag body  132  is in its second position, i.e., when the movable contacts  20  are in the closed, second position, the interlock unit blocking member spring  610  biases the interlock unit blocking member body  650  to its second position. As described above, when the interlock unit blocking member body is in its second position, the interlock unit blocking member body blocking lug  656  blocks movement of the first actuator body  100 . Thus, when the movable contacts  20  are in the closed, second position, the closing actuator assembly  52 , i.e., the first actuator  100 , is not free to move. Thus, the multi-level feedback actuator assembly  50 , and elements thereof, are maintained in a “safe configuration” as defined above. 
     While specific embodiments of the invention have been described in detail, it will be appreciated by those skilled in the art that various modifications and alternatives to those details could be developed in light of the overall teachings of the disclosure. Accordingly, the particular arrangements disclosed are meant to be illustrative only and not limiting as to the scope of invention which is to be given the full breadth of the claims appended and any and all equivalents thereof.