Patent Publication Number: US-9412539-B2

Title: Frame-supported circuit breaker having automatic locking function

Description:
CROSS REFERENCE OF RELATED APPLICATION 
     This is a U.S. National Stage under 35 U.S.C 371 of the International Application PCT/CN2012/000093, filed Jan. 18, 2012, which claims priority under 35 U.S.C. 119(a-d) to CN 201110036976.0, filed Jan. 30, 2011. 
     BACKGROUND OF THE PRESENT INVENTION 
     1. Field of Invention 
     The present invention relates to a circuit breaker, and more particularly to an air circuit breaker with a self-locking function after manually setting a breaking code. 
     2. Description of Related Arts 
     Circuit breaker is a very important electrical equipment and is widely applied on electricity management field. However, circuit breaker has disadvantages as follows. 
     In terms of the functions of the conventional circuit breakers, if maintenance workers haven&#39;t finished maintenance after cutting the power, and the circuit breaker is closed at this time, not only the power grid will break down, but also the lives of the works will be threatened. At present, two measures have been taken by power stations. The first one is opening the circuit breaker before the maintenance workers go out, and hanging on a warning board. In this measure, the warning board is easy to be ignored by the works of the power station. If the switch is incorrectly closed, the lives of the worker will be threatened. The second measure is locking the circuit breaker, and unlocking the circuit breaker and closing the switch after the maintenance workers go back. In this measure, safe problem is solved, but backing time of the workers is long and the efficiency is low. 
     In view of the above disadvantages, the present invention is invented after a lot of researches and practices. 
     SUMMARY OF THE PRESENT INVENTION 
     An object of the present invention is to provide an air circuit breaker with a self-locking function for overcoming the above disadvantages. 
     Accordingly, in order to accomplish the above objects, the present invention provides an air circuit breaker with a self-locking function, comprising an air circuit breaker body, wherein the circuit breaker further comprises: 
     an input unit for inputting a locking code and an unlocking code; 
     an authentication processing unit for receiving the locking code and the unlocking code from the input unit and outputting a control signal after authenticating; and 
     a locking unit for receiving the control signal from the authentication processing unit and locking or unlocking the air circuit breaker body. 
     Preferably, the air circuit breaker body comprises: 
     a shell, 
     wherein an output connecting block and an input connecting block are provided on the shell for connecting external lines, an amount thereof equals to an amount of phase lines, wherein the output connecting block is axially connected to a conducting moving contact block, the output connecting block is electrically connected or disconnected to the input connecting block by swinging the conducting moving contact block; and 
     a breaking mechanism provided in the shell, comprising: a power unit and an action unit; wherein, 
     the action unit swings the conducting moving contact block when triggered in such a manner that a circuit is opened or closed; 
     wherein the power unit provides power for instantly opening or closing the action unit. 
     Preferably, the power unit comprises: 
     an energy storage spring; 
     an energy storage action mechanism for transforming energy into potential energy of the energy storage spring; and 
     a limiting mechanism for limiting the energy storage spring in such a manner that the potential energy is stored before the energy storage spring is released. 
     Preferably, the energy storage action mechanism comprises: 
     an input part; 
     a main axle connected to the input part for rotating therewith; 
     a first eccentric wheel mounted on the main axle; 
     a first linkage block connected to the first eccentric wheel for rotating therewith and providing corresponding swinging; and 
     a pressing block connected to the first linkage block for compressing the energy storage spring. 
     Preferably, the limiting mechanism comprises: 
     a pawl linkage block axially connected in the shell, wherein the pawl linkage block is limited to rotating in a single direction by a limiting screw, the pawl linkage block has a trigger end and a limiting end; and 
     a limiting wheel mounted on the main axle, wherein a plurality of limiting protrusions are provided on the limiting wheel, the limiting protrusions lean against the limiting end. 
     Preferably, the air circuit breaker further comprises a first restoring spring for restoring the pawl linkage block after being triggered. 
     Preferably, the action unit comprises: 
     a first linkage axle, wherein a traction element is provided thereon, the traction element is connected to the conducting moving contact block for towing and swinging the conducting moving contact block; 
     a second linkage block axially connected to the first linkage axle; 
     a third linkage block axially connected to the second linkage block, wherein a first end thereof is connected to the traction element; 
     a main restoring spring connected to the first end of the third linkage block for restoring the third linkage block; 
     a fourth linkage block axially connected to the first linkage block, wherein the fourth linkage block has a first top end and a second top end, the first top end leans against a limiting rod; 
     a fifth linkage block axially connected in the shell, wherein the fifth linkage block leans against the first top end and has a circuit breaking trigger end; and 
     a rotating trigger block having a first leaning part and a pressing part, wherein the first leaning part leans against the fifth linkage block, the pressing part provides pressing actions if an external circuit breaking order is received. 
     Preferably, the air circuit breaker further comprises a second restoring spring, wherein when the rotating trigger block is pressed, the fifth linkage block is detached from the rotating trigger block, the second restoring spring is utilized in such a manner that the fifth linkage block rotates along an axle. 
     Preferably, the input unit comprises a keyboard. 
     Preferably, the authentication processing unit is a microprocessor. 
     Preferably, the locking unit comprises: 
     a first linkage element rotating along an axle; 
     a first linkage rod, wherein a first end thereof is connected to a second end of the first linkage element; 
     a rotating axle driven to rotate by the second end of the first linkage element; 
     a trigger part casing on the rotating axle and corresponding to the pressing part of the rotating trigger block, wherein the air circuit breaker body is opened by pressing the pressing part; 
     an electromagnet, wherein an armature end thereof is corresponding to a first end of the first linkage element; and 
     an action control circuit for receiving the control signal in such a manner that an electrifying state of windings of the electromagnet is controlled. 
     Preferably, the action control circuit comprises: 
     a fourth triode and a seventh triode respectively connected to two output ends of the microprocessor; 
     an eighth triode, wherein a base thereof is connected to a collector of the fourth triode; 
     a sixth triode, wherein a base thereof is connected to an emitter of the fourth triode; 
     a fifth triode, wherein a base thereof is connected to an emitter of the seventh triode, an emitter of the sixth triode is connected to an emitter of the fifth triode, and a collector of the fifth triode is connected to an emitter of the eighth triode; 
     a ninth triode, wherein a emitter thereof is connected to a collector of the sixth triode; and a collector of the ninth triode is connected to a collector of the eighth triode; 
     a ninth diode provided between a base of the fourth triode and the emitter of the sixth triode; and 
     a twelfth diode provided a base of the seventh triode and the emitter of the fifth triode; 
     wherein an input end and an output end of the windings of the electromagnet are respectively provide between the emitter of the fifth triode and the emitter of the sixth triode. 
     Preferably, a secondary self-locking mechanism comprises: 
     a loop mounted on the rotating axle, wherein a self-locking slot is provided on an inner wall of the loop; 
     a self-locking shell having a gap; and 
     a self-locking block, wherein a third restoring spring is provided therein, the self-locking block has a self-locking end leaning against the inner wall of the loop. 
     Preferably, the input part is a handle and/or a motor. 
     Preferably, the input unit further comprises a wireless transceiver circuit and a remote controller, the wireless transceiver circuit is connected to the authentication processing unit for receiving a code inputted by the remote controller by a wireless method. 
     Therefore, when compared to conventional technologies, the present invention has advantages as follows. If maintenance workers haven&#39;t finished maintenance after cutting power, a circuit breaker can&#39;t be closed, and lives of the maintenance workers are not threatened. After long distance maintenance is finished, the maintenance workers can tell a code to a power station. The power station inputs the code for authenticating before closing a switch in such a manner that maintenance efficiency is improved. 
     These and other objectives, features, and advantages of the present invention will become apparent from the following detailed description, the accompanying drawings, and the appended claims. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of an air circuit breaker with a self-locking function according to the present invention. 
         FIG. 2  is a first sectional view of the air circuit breaker according to the present invention. 
         FIG. 3  is a partially exploded view of the air circuit breaker according to a preferred embodiment of the present invention. 
         FIG. 4  is a second sectional view of the air circuit breaker according to the present invention. 
         FIG. 5  is an exploded view of a locking unit of the air circuit breaker according to the present invention. 
         FIG. 6A  is a sectional view of an opened air circuit breaker under a normal condition according to the present invention. 
         FIG. 6B  is a side view of the opened air circuit breaker under the normal condition according to the present invention. 
         FIG. 7A  is a sectional view of a closed air circuit breaker under a normal condition according to the present invention. 
         FIG. 7B  is a side view of the closed air circuit breaker according to the present invention. 
         FIG. 8A  is a sectional view of the air circuit breaker in a self-locking state caused by a short circuit according to the present invention. 
         FIG. 8B  is a side view of the air circuit breaker in the self-locking state caused by the short circuit according to the present invention. 
         FIG. 9A  is a sectional view of the air circuit breaker set to the self-locking state according to the present invention. 
         FIG. 9B  is a side view of the air circuit breaker set to the self-locking state according to the present invention. 
         FIG. 10  is a perspective view of a control circuit of the air circuit breaker according to a preferred embodiment 1 of the present invention. 
         FIG. 11  is a perspective view of a control circuit of the air circuit breaker according to a preferred embodiment 2 of the present invention. 
         FIG. 12  is a perspective view of a control circuit of the air circuit breaker which is corresponding to a remote controlled circuit according to the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Referring to the drawings, the above and other preferred embodiments of the present invention as well as advantages are illustrated. 
     Referring to the  FIG. 1  and the  FIG. 2  of the drawings, a perspective view and a first sectional view of an air circuit breaker with a self-locking function according to the present invention are illustrated. The air circuit breaker comprises: an air circuit breaker body for breaking a circuit and selectively opening or closing the circuit by a close bottom  321  or an open bottom  322  provided outside the air circuit breaker body, wherein the air circuit breaker body comprises: 
     a shell, 
     wherein an output connecting block  312  and an input connecting block  311  are provided on the shell for connecting external lines, an amount thereof equals to an amount of phase lines, wherein the output connecting block  312  is axially connected to a conducting moving contact block  313 , wherein axial connection is a kind of electrical connection, when the conducting moving contact block  313  contacts with the input connecting block  311 , the output connecting block  312  is electrically connected or disconnected to the input connecting block  311  by swinging the conducting moving contact block  313 ; and 
     a breaking mechanism (not shown in the drawings) provided in the shell for opening and closing the air circuit breaker body. 
     Preferably, an input unit  6  is provided on the shell for inputting a locking code and an unlocking code. The input unit  6  comprises a keyboard, wherein the keyboard can be a physical keyboard or a touch keyboard. 
     Referring to the  FIG. 3  and the  FIG. 4  of the drawings, a section view, a perspective view and a second sectional view of the air circuit breaker with the self-locking function according to the present invention are illustrated. A structure of the breaking mechanism is mainly provided, wherein the breaking mechanism comprises: a power unit and an action unit; wherein, 
     the action unit swings the conducting moving contact block  313  when triggered in such a manner that a circuit connected to the air circuit breaker body is opened or closed; 
     wherein the power unit provides power for instantly opening or closing the action unit. 
     Preferably, the power unit comprises: 
     an energy storage spring  36 ; 
     an energy storage action mechanism; and 
     a limiting mechanism; 
     wherein the energy storage spring  36  can close the air circuit breaker body, the air circuit breaker body is instantly closed by releasing potential energy stored; 
     wherein the energy storage action mechanism transforms energy into the potential energy of the energy storage spring  36 , the energy can be manual mechanical energy or mechanical energy transformed from electrical energy; wherein the energy storage action mechanism comprises: 
     an input part, wherein the input part can be a motor  51  or a handle  52  or both; 
     a main axle  32  rotating with the input part, wherein the main axle  32  is mounted on two support board  341  in the shell for transmitting torque; 
     a first eccentric wheel  37  mounted on the main axle  32 , wherein when the main axle  32  rotates with the input part, the first eccentric wheel  37  rotates with the main axle; 
     a first linkage block  38  connected to the first eccentric wheel  37  for rotating therewith and providing corresponding swinging; and 
     a pressing block  36  connected to the first linkage block  38 , wherein when the torque from the input part is transmitted by the main axle  32 , the first eccentric wheel  37  and the first linkage block  38 , the pressing block  36  is pushed for compressing the energy storage spring. 
     The limiting mechanism keeps the potential energy of the energy storage spring  36  before released. That is to say, with the energy input by the input part, the pressing block  36  presses the energy storage spring  36 , and the energy storage spring  36  cannot restore because of the limiting mechanism. Preferably, the limiting mechanism comprises: 
     a pawl linkage block  55  axially connected in the shell, wherein the pawl linkage block  55  is limited to rotating in a single direction by a limiting screw  56 , the pawl linkage block  55  has a trigger end and a limiting end; and 
     a limiting wheel  54  mounted on the main axle  32 , wherein a plurality of limiting protrusions  541  are provided on the limiting wheel  54 , the limiting protrusions  541  lean against the limiting end. 
     Preferably, the air circuit breaker further comprises a first restoring spring  352  hung on the pawl linkage block  55  for restoring the pawl linkage block  55  after being triggered. 
     Preferably, the trigger end of the pawl linkage block  55  leans against a leaning part  61 . When the leaning part is triggered by an external device such as an electromagnet, the leaning part is detached from the trigger end, and limiting protrusions  541  of the limiting wheel  54  are detached from the limiting end. Because of an instant elastic force of the energy storage spring  36 , the pressing block  36  is instantly pushed in such a manner that the first linkage block  38  instantly swings. 
     Preferably, the action unit gains energy and power from the power unit for swinging the conducting moving contact block  313  through a serious of transmission. Finally, the output connecting block  311  is electrically connected or disconnected to the input connecting block  312  by the action unit, wherein the power unit comprises: 
     a first linkage axle  332 , wherein a traction element  331  is provided thereon, the traction element  331  is connected to the conducting moving contact block  313  for towing and swinging the conducting moving contact block  313 ; 
     a second linkage block  62  axially connected to the first linkage axle  332 ; 
     a third linkage block  53  axially connected to the second linkage block  62 , wherein a first end thereof is connected to the traction element  331 ; 
     a main restoring spring  353  connected to the first end of the third linkage block  53  for restoring the third linkage block  53 ; 
     a fourth linkage block  39  axially connected to the first linkage axle  38 , wherein the fourth linkage block has a first top end and a second top end, the first top end leans against a limiting rod  63 ; 
     a fifth linkage block  34  axially connected in the shell, wherein the fifth linkage block leans against the first top end and has a circuit breaking trigger end; and 
     a rotating trigger block  57  having a first leaning part and a pressing part, wherein the first leaning part leans against the fifth linkage block  34 , the pressing part provides pressing actions if an external circuit breaking order is received. According to the present embodiment, the pressing part is a round bar extending outward. For example, an armature end of the electromagnet leans against the pressing part of the rotating trigger block  57 . When the electromagnet is electrified according to an external order, the armature end presses the pressing end in such a manner that the leaning end is detached from the fifth linkage block  34  for opening the air circuit breaker body. 
     Preferably, the air circuit breaker further comprises a second restoring spring  352 , wherein when the rotating trigger block  57  is pressed, the fifth linkage block  34  is detached from the rotating trigger block  57 , the second restoring spring  352  is utilized in such a manner that the fifth linkage block  34  rotates along an axle. 
     Referring to the  FIG. 5  of the drawings, an exploded view of a locking unit of the air circuit breaker with the self-locking function according to the present invention is illustrated, wherein a structure providing the self-locking function under a short circuit condition is showed, which is a feature of the present invention. That is to say, the self-locking function is provided if the short circuit condition is occurred. Preferably, the locking unit comprises: 
     a short circuit detection element axially connected in the air circuit breaker body, wherein when a phase line connected to the air circuit breaker body is short-circuited, a strong magnetic field is surely generated; because the short circuit detection element is axially connected, a mechanical rotating action is provided; the short circuit detection element comprises at least one rotating magnetic element  43 ; preferably, the short circuit detection element comprises three rotating magnetic elements  43  respectively corresponding to the output connecting block  312 ; when the magnetic field is generated by the short circuit, the rotating magnetic element rotates; a restoring spring  451  is provided on the rotating magnetic element  43  and rotates therewith; the restoring spring  451  has an induction section and a pressing section; the induction section is provided near the output connecting block  312  or the input connecting block  311 ; according to the preferred embodiment, the induction section is provided under the output connecting block  312 ; 
     a short circuit trigger mechanism connected to the short circuit detection element, wherein the short circuit trigger mechanism has a trigger end connected to the breaking mechanism of the air circuit breaker body; when the short circuit trigger mechanism is in linkage with the rotation of the short circuit detection element, the trigger end activates the breading mechanism for breaking the circuit; wherein the short circuit trigger mechanism comprises: 
     a first linkage element  441  rotating along an axle, wherein a first end of the first linkage element  441  leans against the pressing section of the rotating magnetic element  43 ; wherein the first linkage element  441  comprises: 
     a restoring spring  452  provided on a axle of the first linkage element  441  for restoring; 
     a first linkage rod  442 , wherein a first end thereof is connected to a second end of the first linkage element  441 ; 
     a rotating axle  445  driven to rotate by the second end of the first linkage rod  442 ; and 
     a trigger part  446  casing on the rotating axle  445  and corresponding to the pressing part of the rotating trigger block  57 , wherein the air circuit breaker body is opened by pressing the pressing part. 
     When the short circuit occurs, the above structure can open the air circuit breaker body. However, the short circuit trigger mechanism without the magnetic field will be restored by the restoring spring  451  and the restoring spring  452  after cutting the power and a corresponding closing order can close the air circuit breaker body again. If the short circuit is not fixed, the magnetic rotating element  43  of the short circuit will be in linkage with the short circuit trigger mechanism again for opening the circuit. Continuously switching the air circuit breaker body between a close state and an open state will affect a life of the air circuit breaker body or other devices in the power grid. 
     In order to accomplish the self-locking function of the present invention, which means under the normal condition, the maintenance is provided without accidents due to closing the circuit, a corresponding structure further comprises: 
     an authentication processing unit mounted on a control circuit for receiving the code from the input unit  6  and outputting a control signal after authenticating; and 
     a locking unit for receiving the control signal from the authentication processing unit and locking or unlocking the air circuit breaker body by the breaking mechanism. 
     Preferably, the locking unit according to the preferred embodiment comprises: 
     an electromagnet  28 , wherein an armature end thereof is corresponding to the first end of the first linkage element  441 ; and 
     an action control circuit for receiving the control signal in such a manner that an electrifying state of windings of the electromagnet  28  is controlled. 
     For a better performance, a secondary self-locking mechanism is provided, wherein the secondary self-locking mechanism also prevents the breaking mechanism from being restored. The secondary self-locking mechanism can be not utilized for setting the self-locking function. The secondary self-locking mechanism comprises: 
     a loop  447  mounted on the rotating axle  445 , wherein a self-locking slot  2471  is provided on an inner wall of the loop  447 ; 
     a self-locking shell  42  having a gap  421 , wherein the self-locking shell  42  is mounted on the shell of the air circuit breaker body; and 
     a self-locking block  41 , wherein a third restoring spring is provided therein, the self-locking block has a self-locking end leaning against the inner wall of the loop  447 , when the short circuit occurs, the self-locking end embeds in the self-locking slot  4471 . 
     Referring to the  FIG. 6A  and the  FIG. 6B  of the drawings, a sectional view and a side view of the opened air circuit breaker under a normal condition according to the present invention are illustrated, wherein at this time, the present invention is in the open state, the conducting moving contact block  313  is detached from the input connecting block  311 . The conducting moving contact block  313  is provided under the output connecting block  312  and doesn&#39;t rotate because of no short circuit magnetic field. At the same time, the short circuit trigger mechanism is in a normal state. The self-locking block  41  is detached from the self-locking slot  4471 . 
     At the same time, no locking code is inputted into the input unit, and no action is provided by the locking unit. 
     Referring to the  FIG. 7A  and the  FIG. 7B  of the drawings, a sectional view and a side view of a closed air circuit breaker under the normal condition according to the present invention are illustrated, wherein at this time, compared to the  FIG. 6A  and the  FIG. 6B , the present invention is in the close state, the conducting moving contact block  313  contacts with the input connecting block  311 . The conducting moving contact block  313  is provided under the output connecting block  312  and doesn&#39;t rotate because of no short circuit magnetic field. The short circuit trigger mechanism is also in a normal state. The self-locking block  41  is detached from the self-locking slot  4471 . 
     Referring to the  FIG. 8A  and the  FIG. 8B  of the drawings, a sectional view and a side view of the air circuit breaker in a self-locking state caused by the short circuit according to the present invention are illustrated, wherein when the short circuit occurs, the strong magnet is generated, the induction section of the rotating magnetic elements  43  swings to the output connecting block  312  in such a manner that the pressing section presses the first linkage element  441 . The first linkage element  441  swings after being pressed and pushes the first linkage rod  442  in such a manner that the rotating axle  445  rotates. Then the trigger part  446  swings for pressing the pressing part of the rotating trigger block  57 . And the air circuit breaker body is broken by pressing the pressing part. 
     At the meantime, the loop  447  rotates with the rotating axle  445  in such a manner that the self-locking end of the self-locking block  41  embeds in the self-locking slot  4471  and extends out of the gap  421  of the self-locking shell  42  by being pushed by the third restoring spring  411 . 
     With the foregoing structure, the air circuit breaker is broken, the strong magnetic field due to the short circuit disappears, and the rotating magnetic element  43  restores by the restoring spring  451 . However, because the self-locking block  41  extends out of the gap  421  of the self-locking shell  42 , the self-locking end cannot detach from the self-locking slot  4471 , and the rotating axle  445  cannot rotate in such a manner that the trigger part  446  still presses the pressing part of the rotating trigger block  57  for providing self-locking. 
     Referring to the  FIG. 9A  and the  FIG. 9B  of the drawings, a sectional view and a side view of the air circuit breaker with the self-locking function set to the self-locking state according to the present invention are illustrated, wherein when the circuit is open, the locking code can be input through the input unit. At this time, the locking unit receives the control signal from the authentication processing unit and electrifies the windings of the electromagnet  28 . The armature end pushes the first end of the first linkage element  441  for swinging the first linkage element  441 . The first linkage rod  442  is pushed by the first linkage element  441  in such a manner that the rotating axle  445  rotates. The trigger part swings for pressing the pressing part of the rotating trigger block  57  and providing the self-locking. 
     When the locking code is inputted through the input unit, the locking unit receives the control signal from the authentication processing unit for cutting the powder of the windings of the electromagnet  28  or reserving currency. The armature end is detached from the first end of the first linkage element  441  by the restoring spring of a reserve magnetic force. The first linkage element  441  restores by the restoring spring  451  and  452  in such a manner that the first linkage rod  442  is pulled back by the first linkage element  441  in such a manner that the rotating axle  445  rotates back. The trigger part swings back in such a manner that the pressing part of the rotating trigger block  57  can be detached. 
     For unlocking, when an unlocking code is inputted, the self-locking block  41  should be pushed back to the self-locking shell  42  manually for detaching the self-locking end from the self-locking slot  4471 . Thus, the trigger part  446  is detached from the pressing part of the rotating trigger block  57  by the restoring spring  452  provided on the axle of the first linkage element  441  for unlocking. Then the circuit can be closed again. When short circuit occurs, just pushing the self-locking block  41  back to the self-locking shell  42  for unlocking, and no unlocking code is needed. 
     Referring to the  FIG. 10  of the drawings, a perspective view of a control circuit of the air circuit breaker with the self-locking function according to a preferred embodiment 1 of the present invention is illustrated, wherein the control circuit comprises 
     a supply circuit; 
     the input unit  6 ; 
     the authentication processing unit; and 
     the action control circuit. 
     Currency signals are inputted to the supply circuit through the phase lines A, B and C. The currency signals pass through a first diode D 1 , a second diode D 2  and a third diode D 3  for rectifying. Then the currency signals pass through a capacity C 1  for filtering and resistance R 1  for reducing a voltage. An output voltage is stabilized by a stabilivolt D 12 . The supply circuit provides a stable voltage to the electrical components by the stabilivolt D 12 . 
     Code information is inputted to the input unit  6  by bottoms S 1  to S 16  and sent to the authentication processing unit. A fingerprint collector can replace the keyboard of the input unit  6 . Code signals input are the locking code or the unlocking code. The authentication processing unit can be a microprocessor. 
     The action control circuit comprises: 
     a fourth triode Q 4  and a seventh triode Q 7  respectively connected to two output ends of the microprocessor; 
     an eighth triode Q 8 , wherein a base thereof is connected to a collector of the fourth triode Q 4 ; 
     a sixth triode Q 6 , wherein a base thereof is connected to an emitter of the fourth triode Q 4 ; 
     a fifth triode Q 5 , wherein a base thereof is connected to an emitter of the seventh triode Q 7 , an emitter of the sixth triode Q 6  is connected to an emitter of the fifth triode Q 5 , and a collector of the fifth triode Q 5  is connected to an emitter of the eighth triode Q 8 ; 
     a ninth triode Q 9 , wherein a emitter thereof is connected to a collector of the sixth triode Q 6 ; and a collector of the ninth triode Q 9  is connected to a collector of the eighth triode Q 8 ; 
     a ninth diode D 9  provided between a base of the fourth triode Q 4  and the emitter of the sixth triode Q 6 ; and 
     a twelfth diode D 12  provided a base of the seventh triode Q 7  and the emitter of the fifth triode Q 5 ; 
     wherein an input end and an output end of the windings of the electromagnet are respectively provide between the emitter of the fifth triode Q 5  and the emitter of the sixth triode Q 6 . 
     When the breaker is opened, the locking code inputted by the input unit for the first time is identified and stored by the authentication processing unit. The electromagnet DTC is driven by the action control circuit and is in a working state. And the breaker cannot be closed at this moment. 
     The unlocking code is inputted by the input unit  6 . The microprocessor determines whether the unlocking code inputted is the same as a predetermined unlocking code before changing electric potential of a first output end and a second output end PXx of the microprocessor (wherein the first and the second output end are judged according to the drawings from a top to a bottom). 
     If the unlocking code inputted is not the same as the predetermined unlocking code, potential difference of both ends of the electromagnet DCT is not changed. If the unlocking code inputted is the same as the predetermined unlocking code, the potential difference of both ends of the electromagnet DCT is changed for taking back an armature and unlocking. 
     Referring to the  FIG. 11  of the drawings, a perspective view of a control circuit of the air circuit breaker with the self-locking function according to a preferred embodiment 2 of the present invention is illustrated, wherein the input unit further comprises a wireless transceiver circuit and a remote controller, the wireless transceiver circuit is connected to the authentication processing unit, the wireless transceiver circuit can be connected through the remote controller for operating the authentication processing unit through operating the remote controller. Otherwise, independently operating the remote controller and avoiding touching the breaker are safe and convenient. After orders are inputted, processing procedures of the authentication processing unit are the same as the processing procedures of the preferred embodiment utilizing the keyboard. Furthermore, a priority level can be set for the keyboard and the remote controller for detailed otherness operations. 
     Referring to the  FIG. 12  of the drawings, a perspective view of a control circuit of the air circuit breaker with the self-locking function which is corresponding to a remote controlled circuit according to the present invention is illustrated, wherein the remote controller comprises: 
     a button part S 1 ˜S 16 ; 
     a processor connected to the button part S 1 ˜S 16 ; and 
     a wireless transceiver circuit connected to the processor and corresponding to the wireless transceiver circuit of the input unit  6  which is connected to the authentication processing unit; therefore, the remote controller has an authority for controlling the air circuit breaker with the self-locking function. 
     One skilled in the art will understand that the embodiment of the present invention as shown in the drawings and described above is exemplary only and not intended to be limiting. 
     It will thus be seen that the objects of the present invention have been fully and effectively accomplished. Its embodiments have been shown and described for the purposes of illustrating the functional and structural principles of the present invention and is subject to change without departure from such principles. Therefore, this invention includes all modifications encompassed within the spirit and scope of the following claims.