# Patent

## Title
Circuit breaker configuration

## Abstract

A circuit breaker configuration contains a number of circuit breakers each to be connected via lines to a system component of a power distribution system and a plurality of control buttons with a respective one of the control buttons connected to a respective one of the circuit breakers. The respective control button for the respective circuit breaker passes through a control panel and is actuated from a front side of the control panel. A coupling element accessible from the front side of the control panel is provided for an interchange of diagnosis data and/or parameterization data. The coupling element is associated with the circuit breakers.

## Background
CROSS-REFERENCE TO RELATED APPLICATIONS
This is a continuation, under 35 U.S.C. §120, of copending international application No. PCT/EP2005/008347, filed Aug. 2, 2005, which designated the United States; this application also claims the priority, under 35 U.S.C. §119, of German patent application No. DE 20 2004 012 469.9, filed Aug. 10, 2004; the prior applications are herewith incorporated by reference in their entirety.


BACKGROUND OF THE INVENTION
Field of the Invention
The invention relates to a circuit breaker configuration having a number of circuit breakers, which are each connected via lines to a system component of a power distribution system. In this case, circuit breakers are intended to mean in particular line circuit breakers for protecting current-carrying lines in a low-voltage system.
Such a circuit breaker configuration is generally part, in particular, of a switchgear cabinet of a complex assembly or airplane power supply system having circuit breakers, which are held in a control panel in the form, for example, of a control board and whose control buttons are passed through the control panel via corresponding leadthrough openings from a rear side of the control panel and toward a front side.
The control buttons of the circuit breakers are used, in particular, for manually tripping the respective circuit breaker in order to switch the corresponding or affected line path and the system component of the power distribution system associated therewith such that they do not carry a current or voltage. In addition, the control button, in general owing to its respective position or change in position, indicates a circuit breaker which has tripped in the event of a fault owing to an overload of the lines to be protected of the affected line path.
SUMMARY OF THE INVENTION
It is accordingly an object of the invention to provide a circuit breaker configuration, which overcomes the herein-mentioned disadvantages of the heretofore-known devices of this general type, which in addition to merely the control function, diagnosis and/or parameterization functions are also made possible.
With the foregoing and other objects in view there is provided, in accordance with the invention, a circuit breaker configuration. The circuit breaker configuration contains a number of circuit breakers each to be connected via lines to a system component of a power distribution system and a plurality of control buttons with a respective one of the control buttons connected to a respective one of the circuit breakers. The respective control button for the respective circuit breaker passes through a control panel and is actuated from a front side of the control panel. A coupling element accessible from the front side of the control panel is provided for an interchange of diagnosis data and/or parameterization data. The coupling element is associated with the circuit breakers. The coupling element provides a bus-free data interchange with the power distribution system and is connected within the respective circuit breaker to a line terminal of the system component associated with the respective circuit breaker.
In this regard, the coupling element, which is likewise accessible from the front side of the control panel, for the interchange of diagnosis and/or parameterization data is associated with the or each circuit breaker.
In this case, the invention is based on the consideration that, first, the circuit breakers of such a circuit breaker configuration are increasingly equipped with local intelligence in the form, in particular, of a, for example, processor-assisted processing unit and therefore, in addition to the actual protective function, can also take on monitoring and control functions. Second, an access option should be made possible for the resulting diagnosis and/or parameterization functions even in the case of ready-installed circuit breakers while avoiding retrofitting of a data bus system, which is generally complex for such purposes. This can be achieved by virtue of the fact that diagnosis or parameterization of the circuit breakers and/or of the system components, which are coupled to the circuit breakers, of the power distribution system is made possible from the control side. As a result, configuring the devices for such diagnosis or parameterization purposes is as unnecessary as a data bus system.
In one advantageous configuration, the coupling element, which is accessible from the front side of the control panel, for data interchange is configured for diagnosis or parameterization purposes for bidirectional data interchange. In this case, the coupling element may be in the form of a transmission and/or reception device for wireless data interchange. Here, in principle optical data transmission, for example by infrared, or else acoustic data transmission, for example by ultrasound, is conceivable. Radio data transmission can also be used. In principle, the coupling element can also be configured for data interchange using cables, lines or wires, expediently in the form of an electrical connecting connection or plug-in connection.
As regards the geometrical configuration, the coupling element can be provided in the control panel, preferably in the direct vicinity of the respective control button of the associated circuit breaker, or preferably in the control button itself. The control button is in this case also understood to mean a control element in the form of an actuating button, an actuating rocker or the like.
The breaker-internal coupling or connection of the coupling element can be provided via a processing unit, which is provided in the respective circuit breaker, for measuring and/or controlling breaker-relevant data or switching elements. The coupling element for data interchange with the power distribution system or the corresponding system component can also be connected within the breaker to a line terminal of the system component associated with the respective circuit breaker.
In order to prevent an overvoltage, originating from the power distribution system, at the diagnosis device when a diagnosis or parameterization device is connected via the coupling element provided in the control panel, an auxiliary switching element is expediently connected into the breaker-internal connection between the coupling element and the line terminal. In this case, the auxiliary switching element (auxiliary switch) interacts with a main switching element (main switch) of the circuit breaker such that data interchange with the respective system component of the power distribution system can only take place when the main switch is open and, as a result of the coupling, the auxiliary switch is closed.
The advantages achieved by the invention consist in particular in the fact that, owing to the configuration of a coupling element, which is accessible from the front side of a control panel of a circuit breaker configuration, data interchange with breaker-internal components, on the one hand, and with system components, which are connected to the respective circuit breaker, of a power distribution system, on the other hand, is made possible without a bus. The data interchange expediently takes place via a diagnosis or parameterization device, which has a corresponding coupling point or interface in order to write or read diagnosis and/or parameterization data likewise from the front side of the control panel. It is thus possible, via such bus-free data interchange via the corresponding coupling elements, for measurement and fault data, which may be buffer-stored in the circuit breaker, to be read and for parameterization data for configuring the circuit breaker monitoring the respective lines of the power distribution system, such as specific line or system data, for example, to be written to the circuit breaker or, via said circuit breaker, to the respective system component of the power distribution system.
Other features which are considered as characteristic for the invention are set forth in the appended claims.
Although the invention is illustrated and described herein as embodied in a circuit breaker configuration, it is nevertheless not intended to be limited to the details shown, since various modifications and structural changes may be made therein without departing from the spirit of the invention and within the scope and range of equivalents of the claims.
The construction and method of operation of the invention, however, together with additional objects and advantages thereof will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings.



BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a block circuit diagram of a circuit breaker configuration of a power distribution system having control and coupling elements disposed in a control panel and a diagnosis device for data interchange according to the invention;
FIG. 2 is a block circuit diagram of a variant embodiment having a coupling element, which is disposed in the control panel and is coupled directly to the corresponding circuit breaker; and
FIG. 3 is a block circuit diagram of an embodiment having the coupling element disposed in the control element of the circuit breaker.



DESCRIPTION OF THE PREFERRED EMBODIMENTS
Mutually corresponding parts are provided with the same reference symbols in all of the figures. Referring now to the figures of the drawing in detail and first, particularly, to FIG. 1 thereof, there is shown a schematic of a circuit breaker configuration having a number of line circuit breakers LS1 . . . n, which are connected via lines L11 . . . L1m to in each case one system component SK1 . . . n of a power distribution system or power supply system EN.
A control element BE1 . . . n, which will be referred to below as a control button, is associated with each line circuit breaker LS1 . . . n, which will be referred to below as a circuit breaker. The respective control button BEn, which may also be in the form of an actuating button or an actuating rocker, is coupled to the respective circuit breaker LSn mechanically via a corresponding switching element SEn. The control button BEn of the respective circuit breaker LSn is disposed in a control panel BF and is passed there to the outside toward an outer side in a manner which is not illustrated in any more detail, via through-openings from a housing or device inner side IS, for example the interior of a switchgear cabinet or power supply system cabinet, and is therefore accessible and capable of being actuated from the front side FS of the control panel BF.
In the exemplary embodiment shown in FIG. 1, a coupling element KE1 . . . n is provided physically adjacent to the or each control button BE1 . . . n, which coupling element is likewise accessible from the front side FS of the control panel BF. The respective coupling element KEn is device-internal, i.e. is connected to the respective circuit breaker LSn, for example via a connecting line VLn, on the inner side IS, which is opposite the front side FS, of the control panel BF.
The coupling element KEn is used for data interchange with a schematically illustrated diagnosis device DG. The diagnosis device has a coupling part KT, which is complementary to the respective coupling element KEn, wherein, as illustrated symbolically, an electrical connection LD using cables or lines or else a wireless connection IRD, FD can be realized via correspondingly configured coupling elements KEn or coupling parts KT for data interchange. Optical data interchange via an infrared path IRD with, for example, coupling elements KEn in the form of infrared transmitters and receivers or else radio data interchange via a radio path FD can therefore take place. For this purpose, the coupling elements KEn are then in the form of corresponding transmission and reception devices.
FIGS. 2 and 3 show the basic configuration of a circuit breaker LSn having a mechanical, electromechanical or electronic switching mechanism SH and having a main switching element or main switch HS, which is coupled to the switching mechanism SH, in the form of mechanical switching contacts or of an electronic or semiconductor switch, for example in the form of a field effect transistor. A further component part of the circuit breaker LSn is expediently a processing unit VE. The processing unit VE is used, on the one hand, for controlling the switching mechanism SH and/or the main switch HS and, on the other hand, for picking up, storing and processing measured values detected within the circuit breaker LS.
The main switch HS is connected, via the lines Lnm to be monitored, to the respective system component SKn, which is symbolized by a generator G and a load L. In general, the output of the circuit breaker LSn facing the supply of the system component SKn is in this case referred to as a LINE terminal, while the terminal of the circuit breaker LSn which faces the consumer or the load L of the system component SKn is referred to as LOAD.
Illustrated using dashed lines in FIG. 2 is also an auxiliary switching element HE, which is provided within the breaker and is connected into a breaker-internal connecting line VLL to the LOAD terminal of the circuit breaker LSn. The connecting line VLL is passed to the coupling element KEn provided in the control panel or front panel BF via the processing unit or the logic VE of the circuit breaker LSn. A direct connection from the coupling element KEn via the auxiliary switching element HE to the LOAD terminal of the circuit breaker LSn can also be provided, as illustrated by dashed lines. The auxiliary switching element HE, which is also referred to below as the auxiliary switch, and the main switch HS are in this case coupled to one another, in particular via the processing unit VE or via a separate front-side additional contact, such that the auxiliary switch HE is only closed when the main switch HS is open. An overvoltage at the coupling element KEn and, via this, at the diagnosis device DG is therefore reliably avoided.
In the exemplary embodiment shown in FIG. 2, the coupling element KEn is coupled directly to the circuit breaker LSn. For this purpose, a direct connecting contact between the coupling element and the circuit breaker LSn, in particular via its breaker housing, may exist in a manner which is not illustrated in any more detail.
Data interchange with the circuit breaker LSn and, possibly via the circuit breaker, with the respective system component SKn and via the coupling element KEn takes place with the diagnosis and/or parameterization device DG, which can likewise be operated from the front side FS of the control panel BF. In this case, the data interchange can take place, as symbolized by the double arrow in FIG. 3, optically, acoustically or by radio and therefore in wireless fashion or, as symbolized by the dashed-line connection in FIG. 2, using cables or lines. For this purpose, the diagnosis device has the corresponding coupling point or interface KT for such wireless data interchange or data interchange using wires.
In the preferred embodiment, in particular in the case of tight physical or spatial conditions with a correspondingly small-area control panel BF, as shown in FIG. 3, the coupling element KEn is integrated in the control element BE. The breaker-internal line connection VLn can in this case, as illustrated by dashed lines, also take place via the mechanical switching element SEn in the connection between the control button BE and the switching mechanism SH. In this embodiment, an auxiliary switching element HE is not shown, in which case the breaker-internal configuration with or without auxiliary switching element or auxiliary switch HE and with or without processing unit VE, both in the embodiment with a separate through-opening for the coupling element KEn through the control panel BF and in the embodiment with a coupling element KEn integrated in the control button BE can be provided.
The data interchange via the respective coupling element KEn preferably takes place bidirectionally. For this purpose, control data and parameters or parameterization data DDP can be transmitted from the diagnosis device DG, via the respective coupling element KEn, into the processing unit VE of the respective circuit breaker LSn and/or via the circuit breaker to the respective system component SKn. The control, diagnosis or parameterization data DDP can in this case be stored or buffer-stored in the processing unit VE and/or passed on from there to the system component SKn and also read from the diagnosis device DG again. Line parameters can also be buffer-stored in the processing unit VE. Measured values and diagnosis data, in particular also from the system or the system component SKn, such as coupling impedances and system-specific parameters, for example, can likewise be buffer-stored in the processing unit VE and read, by the diagnosis device DG.
In addition, data or parameters can be read from the system component SKn and therefore system states queried by the diagnosis device DG via the coupling element KEn. In this case, too, system-specific data, fault messages and/or measured values can in turn be buffer-stored in the processing unit VE of the circuit breaker LSn and read at the given time via the coupling element KEn by the diagnosis device DG.
Diagnosis and/or parameterization data DDP are therefore written and read in a bus-free manner via the coupling element KEn of the respective circuit breaker LSn from the control or front side FS without intervention in the installation side of the circuit breaker LSn, i.e. on the inner side IS of the device or housing which is opposite the front side FS, being required for this purpose.

## Claims

1. A circuit breaker configuration, comprising:
a number of circuit breakers, each circuit breaker to be connected via lines to a different one system component of a power distribution system;
a plurality of control buttons, each one of said control buttons being connected to a respective one of said circuit breakers, said respective control button for said respective circuit breaker passing through a control panel and being actuated from a front side of the control panel; and
a coupling element accessible from the front side of the control panel for an interchange of diagnosis data and/or parameterization data, said coupling element associated with said circuit breakers, said coupling element for bus-free data interchange with the power distribution system being connected within said respective circuit breaker to a line terminal of the system component associated with said respective circuit breaker; wherein said circuit breakers each includes: a breaker-internal connection between said coupling element and the line terminal; and an auxiliary switching element connected into said breaker-internal connection between said coupling element and the line terminal.

2. The circuit breaker configuration according to claim 1, wherein said coupling element is configured for bidirectional data interchange.

3. The circuit breaker configuration according to claim 1, wherein said coupling element is a transmission and/or reception device for data interchange.

4. The circuit breaker configuration according to claim 1, wherein said coupling element is disposed in the control panel.

5. The circuit breaker configuration according to claim 1, wherein said coupling element is disposed in a vicinity of or in said control button of the respective circuit breaker.

6. The circuit breaker configuration according to claim 1, wherein:
said circuit breakers each have a breaker-internal processing unit and breaker elements; and
said coupling element is connected to said breaker-internal processing unit of said respective circuit breaker for measuring and/or controlling breaker-relevant data or said breaker elements.

7. The circuit breaker configuration according to claim 1, wherein:
said circuit breakers each has a main switching element; and
said auxiliary switching element is coupled to said main switching element of said respective circuit breaker such that data interchange with the respective system component only takes place when said main switching element is open.