CN113889377A

CN113889377A - Circuit breaker

Info

Publication number: CN113889377A
Application number: CN202010625027.5A
Authority: CN
Inventors: 邵江华; 涂兵; 夏晓敏
Original assignee: Zhejiang Chint Electrics Co Ltd
Current assignee: Zhejiang Chint Electrics Co Ltd
Priority date: 2020-07-02
Filing date: 2020-07-02
Publication date: 2022-01-04

Abstract

A circuit breaker comprises phase pole modules arranged in parallel and a superposed gate module for driving the phase pole modules to automatically switch on and off, wherein the phase pole modules are divided into an L-phase pole module and an N-phase pole module by a partition plate, the L-phase pole module comprises an L-pole operating mechanism, the L pole moving contact of the L pole contact mechanism is connected on the L pole operating mechanism, the N phase pole module comprises an electric leakage protection module, the electric leakage protection module comprises a zero sequence transformer, an electric leakage tripping mechanism, a test button and a residual current action test loop, the residual current action test circuit is provided with two connection and disconnection points, one of the connection and disconnection points is used as a first connection and disconnection point and is controlled to be disconnected or closed by the test button, the other connection and disconnection point is used as a second connection and disconnection point and is controlled to be disconnected or closed by the linkage lever, and any one of the first connection and disconnection point and the second connection and disconnection point can not enable the residual current motion test circuit to be connected. The potential safety hazard caused by long-time pressing of a test button when the circuit breaker is disconnected or reversely connected is avoided.

Description

Circuit breaker

Technical Field

The invention relates to a low-voltage apparatus, in particular to a circuit breaker.

Background

Low-voltage circuit breakers, also known as automatic air switches or automatic air circuit breakers, can be used for distributing electric energy and protecting lines and power supply equipment from overloads and interruptions, and also for infrequent line changeover and for infrequent motor starting. Be equipped with residual current action test circuit in current circuit breaker, this residual current action test circuit adopts single breakpoint structure usually, the both ends of the residual current action test circuit of single breakpoint structure are connected respectively on the end of being qualified for the next round of competitions of adjacent two poles of the earth, when user's power source reverse connection (be outlet terminal power supply promptly), under the condition of mains voltage switch-on, the circuit breaker does not close a floodgate, press test button this moment always, can lead to residual current test circuit resistance scaling loss or release to explode and split, lead to the earth leakage protection function failure of circuit breaker, there is the potential safety hazard.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a circuit breaker with simple structure and high reliability.

In order to achieve the purpose, the invention adopts the following technical scheme:

a circuit breaker comprises phase pole modules arranged in parallel and a superposed gate module used for driving the phase pole modules to be automatically switched on and switched off, wherein each phase pole module is divided into an L-phase pole module and an N-phase pole module by a partition plate, the L-phase pole module comprises an L-pole operating mechanism, an L-pole moving contact of an L-pole contact mechanism is connected to the L-pole operating mechanism, the N-phase pole module comprises an N-pole operating mechanism, an N-pole contact mechanism and a leakage protection module, the N-pole operating mechanism comprises a linkage lever, one end of the linkage lever penetrates through the partition plate to be in linkage connection with the L-pole operating mechanism, the other end of the linkage lever is connected with an N-pole moving contact of the N-pole contact mechanism, and the switching on and off of the N-phase pole module is realized by driving the N-pole operating mechanism to drive the N-pole contact mechanism through the action of the L-pole operating mechanism under the action of the linkage link rod;

the leakage protection module comprises a zero sequence transformer and a leakage tripping mechanism, and when the zero sequence transformer detects leakage current, the superposed gate module drives the leakage tripping mechanism to act so as to open the phase pole module;

the residual current action test circuit has two break points, one break point is controlled to be disconnected or closed by the test button as a first break point, the other break point is controlled to be disconnected or closed by the linkage lever as a second break point, and any one of the first break point and the second break point can not be switched on.

Furthermore, the residual current action test loop comprises a first torsion spring, a second torsion spring and a contact piece, the first torsion spring is installed on one side of the test button, a first elastic arm of the first torsion spring is matched with one end of the contact piece to form a first connection and disconnection point, the test button is matched with the first elastic arm of the first torsion spring, the first connection and disconnection point is disconnected and closed by pressing the test button, and a second elastic arm of the first torsion spring is connected with the circuit board of the coincident gate module through a lead; the second torsion spring is installed on one side of the N-pole operating mechanism, the end part of the first elastic arm of the second torsion spring is matched with the other end of the contact piece to form a second switching point, when the N-pole contact mechanism is switched on and switched off, the middle part of the first elastic arm of the second torsion spring is pressed through the swinging action of the linkage lever to enable the second switching point to be disconnected and closed, and the second elastic arm of the second torsion spring is connected with an N-pole wire inlet terminal in the N-pole module through a wire.

Furthermore, a bending part is arranged in the middle of the first elastic arm of the second torsion spring, and the bending part is used for being matched with the linkage lever to realize the closing or the opening of the second communication point.

Furthermore, the N-phase pole module also comprises an N-pole incoming line terminal, an N-pole outgoing line terminal and an N-pole handle structure, the N-pole incoming line terminal and the N-pole outgoing line terminal are respectively arranged at two sides of the N-phase pole module, the N-pole handle structure and the test button are arranged at the upper part of the N-phase pole module, the zero sequence transformer is arranged at one side close to the N-pole outgoing line terminal, the zero sequence transformer is positioned at the lower part of the N-phase pole module, the electric leakage tripping mechanism is arranged at the middle part of the N-phase pole module and positioned between the N-pole handle structure and the zero sequence transformer, an N-pole operating mechanism and an N-pole contact mechanism are arranged between the electric leakage tripping mechanism and the N-pole incoming line terminal, an N-pole moving contact of the N-pole contact mechanism is connected to a linkage lever of the N-pole operating mechanism, an N-pole static contact of the N-pole contact mechanism is fixed at one side of the zero sequence transformer and is arranged opposite to the N-pole moving contact, the residual current operated circuit loop is arranged around the upper parts of the electric leakage tripping mechanism and the N-pole operating mechanism.

Furthermore, the N-pole operating mechanism further comprises a tension spring, one end of the tension spring is connected to the N-pole movable contact, and the other end of the tension spring is fixedly installed and connected with the circuit board of the superposed gate module through a lead.

Further, the electric leakage tripping mechanism comprises an electric leakage tripping device, a push rod and a reset spring for driving the push rod, the electric leakage tripping device is installed on the partition plate and connected with the circuit board of the superposed gate module, the push rod is rotatably installed on the partition plate, the push rod is provided with an actuating part matched with the ejector rod of the electric leakage tripping device and a touch part matched with the L-pole operating mechanism by penetrating through the partition plate, and when electric leakage occurs, the ejector rod of the electric leakage tripping device drives the push rod to rotate by overcoming the elastic force of the reset spring, so that the touch part pushes the L-pole operating mechanism to act and enable the phase pole module to be switched off under the linkage action of the linkage lever.

Furthermore, a rotating shaft for the push rod to rotate and install and a second limiting boss for being connected with a reset spring are arranged on the partition plate, a first linkage hole is formed in the partition plate and used for matching the L-pole operating mechanism with the touch part, and a second linkage hole is formed in the partition plate and used for linkage of the linkage lever and the L-pole operating mechanism.

Further, the push rod is including being used for rotating the push rod axle of installing on the baffle, and the top protrusion of push rod axle is equipped with and is used for with reset spring complex first spacing boss, and one side lateral wall of push rod axle extends and is equipped with step-like push rod plate, and push rod plate keeps away from one end angle department of push rod axle and extends the axial of push rod axle upwards to be equipped with actuating part, and push rod plate keeps away from another end angle department of push rod axle and extends the axial downwardly extending of push rod axle and be equipped with the portion of touching.

Furthermore, the L-phase pole module comprises an L-pole incoming line terminal and an L-pole outgoing line terminal which are respectively arranged at two sides of the L-phase pole module, and an L-pole handle structure, an L-pole operating mechanism, an L-pole contact mechanism, a short-circuit protection mechanism, an arc extinguish chamber and an overload tripping device are arranged between the L-pole incoming line terminal and the L-pole outgoing line terminal; the L utmost point handle structure sets up the upper portion at L utmost point module mutually, L utmost point operating device sets up in one side of L utmost point handle structure, and L utmost point handle structure passes through the connecting rod linkage with L utmost point operating device, and L utmost point operating device and explosion chamber setting are in the lower part of L utmost point module mutually, short-circuit protection mechanism sets up between L utmost point handle structure and explosion chamber, and short-circuit protection mechanism is relative with L utmost point operating device, and L utmost point moving contact of L utmost point contact mechanism is connected on L utmost point operating device, and L utmost point static contact of L utmost point contact mechanism is fixed to be set up in one side of explosion chamber and to set up with L utmost point moving contact relatively, overload trip gear sets up between L utmost point incoming line terminal and L utmost point operating device.

Furthermore, the L-pole operating mechanism comprises a connecting rod, a lock catch, a jump buckle and a contact support, the contact support is pivotally installed in the L-pole module and rotates around the main shaft, the jump buckle and the lock catch are pivotally installed on the contact support and form a hasp connection, one end of the connecting rod is connected with the L-pole handle structure, the other end of the connecting rod is connected with the jump buckle, and the L-pole moving contact is elastically and fixedly installed on the contact support.

Furthermore, the upper part of the lock catch is provided with a revolute pair, the revolute pair is used for rotatably installing the lock catch on the contact support, one side of the revolute pair is provided with a lock catch part, the lock catch part is used for being matched with the jump buckle to form a hasp connection, the other side of the revolute pair is provided with a linkage shaft hole, a lock catch linkage shaft is installed in the linkage shaft hole, the lower part of the lock catch is provided with an impact part and a trigger part, the impact part is used for being matched with the short-circuit protection mechanism, the trigger part penetrates through the partition plate and is used for being matched with the electric leakage tripping mechanism, the lower part of the lock catch is also provided with a tripping hook, and the tripping hook is used for being matched with the overload tripping device; an avoiding notch for avoiding the main shaft is arranged on the lock catch, and the avoiding notch is positioned between the lock catch part and the impact part.

Furthermore, the superposition gate module comprises a driving handle, a gear transmission device, a tripping driving structure, a motor and a circuit board; the driving handle, the gear transmission device and the motor are arranged on the surface of the circuit board; the driving handle and the gear transmission device are matched to rotate through the driving connecting rod, the gear transmission device is in transmission connection with the motor, and the motor drives the driving connecting rod through the gear transmission device to drive the driving handle to realize automatic switching-on; the tripping driving structure is arranged on one side of the gear transmission device facing the circuit board, the tripping driving structure comprises a driving boss arranged on the gear transmission device and a tripping driving piece rotatably arranged on the coincidence gate module shell, one end of the tripping driving piece is rotatably arranged on the coincidence gate module shell, and the other end of the tripping driving piece is arranged corresponding to a lock catch linkage shaft of the L-pole operating mechanism.

According to the circuit breaker, the phase pole module and the reclosing pole module form a P + N structure, the phase pole module is divided into the L phase pole module and the N phase pole module by the partition plate, the N phase pole module is internally provided with the residual current motion test circuit with two on-off points, and the two on-off points are respectively operated by the test button and the linkage lever of the N pole operating mechanism.

In addition, the N-pole moving contact is provided with a tension spring which can provide closing driving force for the N-pole moving contact and can enable a circuit board of the superposed gate module to take electricity from the N pole.

Drawings

Fig. 1-2 are schematic structural views of a circuit breaker of the present invention;

fig. 3 is a schematic structural diagram of an L-phase pole module in a circuit breaker according to the present invention;

fig. 4 is a schematic structural view of an L-pole operating mechanism in a circuit breaker according to the present invention;

fig. 5 is a schematic structural diagram of a latch of a circuit breaker according to the present invention;

fig. 6 is a schematic structural diagram (opening) of an N-phase pole module in a circuit breaker according to the present invention;

fig. 7 is a schematic structural diagram (closing) of an N-phase pole module in a circuit breaker according to the present invention;

fig. 8 is a schematic structural diagram of a moving contact of N-pole in a circuit breaker according to the present invention;

fig. 9 is a schematic structural view of a link lever in a circuit breaker according to the present invention;

fig. 10 is a schematic structural view of a swing link in a circuit breaker according to the present invention;

FIG. 11 is a schematic diagram of a stacked gate module of a circuit breaker according to the present invention;

fig. 12 is a schematic structural view of a push rod in a circuit breaker according to the present invention;

fig. 13 is a schematic diagram of the electrical connections in a circuit breaker of the present invention.

Detailed Description

The following describes a circuit breaker according to an embodiment of the present invention with reference to fig. 1 to 13. A circuit breaker of the present invention is not limited to the description of the following embodiments.

A circuit breaker comprises phase pole modules arranged in parallel and a superposed gate module 3 for driving the phase pole modules to automatically switch on and off, the phase pole module is divided into an L-phase pole module 1 and an N-phase pole module 2 by a partition plate 5, the L-phase pole module 1 includes an L-pole operating mechanism 13, the L pole moving contact 141 of the L pole contact mechanism is connected on the L pole operating mechanism 13, the N phase pole module 2 comprises an N pole operating mechanism, an N pole contact mechanism and a leakage protection module, the N-pole operating mechanism comprises a linkage lever 231, one end of the linkage lever 231 passes through the partition plate 5 to be in linkage connection with the L-pole operating mechanism 13, the other end of the linkage lever 231 is connected with an N-pole moving contact 241 of the N-pole contact mechanism, under the action of the linkage connecting rod 133, the opening and closing of the N-phase pole module 2 is realized by driving the N-pole operating mechanism to drive the N-pole contact mechanism through the action of the L-pole operating mechanism 13;

the leakage protection module comprises a zero sequence transformer 41 and a leakage tripping mechanism, and when the zero sequence transformer 41 detects leakage current, the superposed gate module 3 drives the leakage tripping mechanism to act to open the phase pole module;

the residual current operated test circuit has two break points, one break point is controlled to be disconnected or closed by the test button 45 as a first break point, the other break point is controlled to be disconnected or closed by the linkage lever 231 as a second break point, and any one of the first break point and the second break point can not enable the residual current operated test circuit to be connected.

According to the circuit breaker, the phase pole module and the superposed gate pole module 3 form a 1P + N structure, the phase pole module is divided into the L-phase pole module 1 and the N-phase pole module 2 by the partition plate 5, the N-phase pole module 2 is provided with the residual current motion test circuit with two connection and disconnection points, and the two connection and disconnection points are respectively operated by the test button 45 and the linkage lever 231 of the N-pole operating mechanism, so that the test button 45 circuit with the two connection and disconnection points solves the problems of human body electric shock danger caused by long pressing of the test button 45 and electric leakage protection function failure caused by long pressing of the test button 45 under the condition of reverse wiring of the circuit breaker.

An embodiment is provided with reference to fig. 1 to 13, in which a circuit breaker includes a phase module and a superposition gate module 3, the phase module includes a phase module housing, a partition 5 is disposed inside the phase module housing, the partition 5 divides a cavity inside the phase module housing into two chambers, an L-phase module 1 and an N-phase module 2 are respectively mounted in the two chambers, the L-phase module 1 and the N-phase module 2 are independent and linked with each other, the L-phase module 1 includes an L-pole operating mechanism 13, the N-phase module 2 includes an N-pole operating mechanism, an N-pole contact mechanism and a leakage protection module, the N-pole operating mechanism includes a link lever 231, one end of the link lever 231 penetrates through the partition 5 to be linked with the L-pole operating mechanism 13, the other end of the link lever 231 is connected with an N-pole moving contact 241 in the N-pole contact mechanism, the structure of the N-pole operating mechanism is different from that of the L-pole operating mechanism 13, the N-pole operating mechanism is not a complete operating mechanism, and the opening and closing of the N-pole contact mechanism needs to be driven by the L-pole operating mechanism 13, that is, when the phase module is opened and closed, the L-pole operating mechanism 13 realizes the opening and closing of the L-phase module 1 and simultaneously realizes the opening and closing of the N-phase module 2 through the linkage action of the linkage lever 231.

As shown in fig. 1-5, the L-phase module 1 includes an L-pole handle structure 12, an L-pole operating mechanism 13, an L-pole contact mechanism, a short-circuit protection mechanism 16, and an overload trip device 17, the L-pole handle structure 12 is linked with a driving handle 31 of the coincidence gate module 3 through a handle linkage shaft, and the coincidence gate module 3 drives the L-pole handle structure 12 through the handle linkage shaft to realize automatic switching-on of the phase module; when the main line is short-circuited, the electromagnetic system in the short-circuit protection mechanism 16 acts to drive the L-pole operating mechanism 13 to trip so as to realize the opening of the breaker module; when the main line is overloaded, the bimetallic component of the overload tripping device 17 acts to drive the L-pole operating mechanism 13 to trip to realize the opening of the phase pole module.

Describing the L-phase pole module 1 in detail with reference to fig. 2 to 5, the L-phase pole module 1 includes an L-pole incoming terminal 111 and an L-pole outgoing terminal 112 respectively disposed at two sides of the L-phase pole module 1, and an L-pole handle structure 12, an L-pole operating mechanism 13, an L-pole contact mechanism, a short-circuit protection mechanism 16, an arc extinguish chamber 15 and an overload trip device 17 are disposed between the L-pole incoming terminal 111 and the L-pole outgoing terminal 112; the L-pole handle structure 12 is arranged on the upper portion of the L-pole module 1, the L-pole operating mechanism 13 is arranged on one side of the L-pole handle structure 12, the L-pole handle structure 12 is linked with the L-pole operating mechanism 13 through a connecting rod 133, the arc extinguish chamber 15 is arranged on the lower portion of the L-pole module 1, the short-circuit protection mechanism 16 is arranged between the L-pole handle structure 12 and the arc extinguish chamber 15, the short-circuit protection mechanism 16 is opposite to the L-pole operating mechanism 13, an L-pole moving contact 141 of the L-pole contact mechanism is connected to the L-pole operating mechanism 13, an L-pole static contact 142 of the L-pole contact mechanism is fixedly arranged on one side of the arc extinguish chamber 15 and is opposite to the L-pole moving contact 141, and the overload tripping device 17 is arranged between the L-pole wire inlet terminal 111 and the L-pole operating mechanism 13.

As shown in fig. 3-5, the L-pole operating mechanism 13 includes a connecting rod 133, a latch 131, a jumper 132, and a contact support, the contact support is pivotally mounted in the L-phase pole module 1, as shown in fig. 4, the contact support is rotatably mounted on a main shaft 135, the contact support rotates around the main shaft 135, the jumper 132 and the latch 131 are pivotally mounted on the contact support and form a snap-fit connection, one end of the connecting rod 133 is connected with the L-pole handle structure 12, the other end of the connecting rod 133 is connected with the jumper 132, and the L-pole moving contact 141 is fixedly mounted on the contact support through elasticity of a spring; after the latch 131 and the trip catch 132 form a latch connection, the L-pole handle structure 12 is operated to drive the L-pole moving contact 141 to rotate in the closing direction, and at this time, the latch 131 in the latch structure rotates around the main shaft 135, and preferably, an avoiding notch 131f avoiding the main shaft 135 is formed on the latch 131. Referring to fig. 5, the latch 131 is described, and the upper portion of the latch 131 is provided with a rotating pair 131a, the rotating pair 131a is used for rotatably mounting the latch 131 on the contact support, a locking part 131b is arranged at one side of the rotating pair 131a, the locking part 131b is convexly arranged towards the direction of the jump buckle 132, the locking part 131b is used for matching with the jump buckle 132 to form a snap connection, the other side of the revolute pair 131a is provided with a linkage shaft hole 131c, a lock catch linkage shaft is arranged in the linkage shaft hole 131c, the lock catch linkage shaft extends into the coincident gate module 3 and is used for realizing automatic brake separation in cooperation with a tripping driving structure of the coincident gate module 3, the lower part of the lock catch 131 is provided with an impact part 131d and a trigger part 131e, the impact part 131d faces to the side of the electromagnetic trip of the short-circuit protection mechanism 16, which is provided with a firing pin, and the impact part 131d is used for realizing the short-circuit protection of the circuit breaker in cooperation with the short-circuit protection mechanism 16; the triggering part 131e penetrates through the partition plate 5 to be matched with a push rod 43 of the leakage tripping mechanism, and is used for tripping and powering off the circuit breaker when a leakage fault occurs; the lower part of the latch 131 is further provided with a trip hook 134, one end of the trip hook 134 is connected to the latch 131, and the other end of the latch 131 faces the overload trip device 17 of the L-phase pole module 1 and is used for being matched with the overload trip device 17, so that overload protection of the circuit breaker is realized. The relief notch 131f of the lock catch 131 is preferably an arc-shaped groove as shown in fig. 5, and the relief notch 131f is located between the lock catch portion 131b and the striking portion 131 d.

The short-circuit protection mechanism 16 includes an electromagnetic release, the electromagnetic release includes an electromagnetic coil, one end of the electromagnetic coil is provided with a striker, the striker is opposite to the striking portion 131d of the latch 131, when a short circuit occurs in the main line, the striker moves to rotate the latch 131, the latch 131 is unlocked by the snap connection of the jump latch 132, and the phase pole module is switched off.

The overload tripping device 17 comprises a bimetallic strip, the bimetallic strip comprises a bimetallic strip, two sides of one end of the bimetallic strip are fixedly connected with an arc striking plate and a connecting piece, and one ends of the bimetallic strip, the arc striking plate and the connecting piece form a fixed end of the bimetallic strip; the bimetallic strip is located between the arc striking plate and the connecting piece, the other end of the bimetallic strip is used as the movable end of the bimetal component, the movable end of the bimetal component corresponds to the tripping hook 134, the other end of the arc striking plate extends into the arc extinguishing chamber 15, and the other end of the connecting piece is connected with the L-pole wire inlet terminal 111.

Introduce N utmost point module 2 in combination with figure 1, 2, 6-10, 12, N utmost point module 2 includes N utmost point incoming wire terminal 211 and N utmost point outgoing lines terminal 212, N utmost point incoming wire terminal 211, N utmost point outgoing lines terminal 212 set up respectively in the both sides of N utmost point module 2, are provided with N utmost point handle structure 22, N utmost point operating device and N utmost point contact mechanism between N utmost point incoming wire terminal 211, N utmost point outgoing lines terminal 212, N utmost point handle structure 22 sets up the upper portion at N utmost point module 2, and N utmost point handle structure 22 links through handle universal driving shaft and L utmost point handle structure 12, makes L utmost point handle structure 12 swing together along with L utmost point handle structure 12 when the divide-shut brake of looks utmost point module. The N-pole operating mechanism comprises a linkage lever 231, the N-pole contact mechanism comprises an N-pole moving contact 241 and an N-pole static contact 242, one end of the linkage lever 231 penetrates through the partition plate 5 to be in linkage connection with the L-pole operating mechanism 13, the other end of the linkage lever 231 is connected with the N-pole moving contact 241, the N-pole static contact 242 is fixedly installed in the N-pole module 2, the N-pole static contact 242 and the N-pole moving contact 241 are arranged oppositely, the linkage lever 231 drives the N-pole moving contact 241 to move under the linkage effect of the L-pole operating mechanism 13 to achieve switching-on and switching-off of the N-pole module 2, and the N-pole contact mechanism performs switching-on and switching-off actions along with the swinging of the linkage lever 231.

As shown in fig. 8 to 10, one end of the linkage lever 231 is provided with a first connection hole 231a, the first connection hole 231a is used for being rotatably connected with the rotating pair 131a of the latch 131, the other end of the linkage lever 231 is provided with a connection shaft 231b, the connection shaft 231b is protrudingly arranged towards one side far away from the L-phase pole module 1, an N-pole movable contact 241 and a swing link 243 are rotatably installed on the connection shaft 231b, and the other end of the swing link 243 and the middle part of the N-pole movable contact 241 are jointly installed on a fixedly arranged swing shaft 244 in the N-phase pole module 2. When the L-pole operating mechanism 13 performs clockwise closing rotation around the main shaft 135, the linkage lever 231 also rotates clockwise, the linkage lever 231 drives the swing link 243 to rotate clockwise, the swing link 243 drives the N-pole moving contact 241 to rotate clockwise, because the swing link 243 and the N-pole moving contact 241 are connected to an unfixed and suspended connecting shaft 231b together, the swing shaft 244 is fixed inside the N-phase pole module 2, and when the swing link 243 rotates clockwise around the swing shaft 244, the swing link 243 drives the lower part of the linkage lever 231 to swing to the right in fig. 8; similarly, when the L-pole operating mechanism 13 drives the N-pole moving contact 241 to perform opening rotation, the linkage lever 231 swings to the left side in fig. 8 under the action of the swing link 243 to return to the initial position.

The N-pole operating mechanism is further provided with a tension spring 232, one end of the tension spring 232 is connected to the N-pole moving contact 241, the other end of the tension spring 232 is fixedly installed and connected with the circuit board 35 of the coincidence gate module 3 through a conducting wire, the tension spring 232 provides closing driving force for the opening and closing of the N-pole contact mechanism, and meanwhile the circuit board 35 of the coincidence gate module 3 can get electricity from the N-pole module 2.

The leakage protection module arranged in the N-phase pole module 2 comprises a leakage tripping mechanism, a zero sequence transformer 41, a test button 45 and a residual current action test loop for generating a simulated leakage current, when the zero sequence transformer 41 detects the leakage current or the simulated leakage current, the controller of the coincidence gate module 3 drives the leakage tripping mechanism to act to open the phase pole module, wherein the opening of the N-phase pole module 2 is realized by means of the L-pole operating mechanism 13 of the L-phase pole module 1.

The electric leakage tripping mechanism comprises an electric leakage tripping device 42, a push rod 43 and a reset spring 44 for driving the push rod 43, wherein the electric leakage tripping device 42 is installed on the partition plate 5 and is connected with the circuit board 35 of the superposed gate module 3, the push rod 43 is rotatably installed on the partition plate 5, the push rod 43 is provided with an actuating part 43d matched with the push rod of the electric leakage tripping device 42 and a touch part 43e matched with the L-pole operating mechanism 13 after penetrating through the partition plate 5, and during electric leakage, the push rod of the electric leakage tripping device 42 drives the push rod 43 to rotate by overcoming the elastic force of the reset spring 44, so that the touch part 43e pushes the L-pole operating mechanism 13 to act, and the phase pole module is switched off under the linkage action of the linkage lever 231.

The zero sequence transformer 41 is used for inducing leakage current or simulating leakage current of a main circuit, the zero sequence transformer 41 is arranged at the lower part of the N-phase pole module 2, and the main circuits of the N-phase pole module 2 and the L-phase pole module 1 penetrate through the zero sequence transformer 41; the electric leakage release 42 is arranged between the N-pole handle structure 22 and the zero sequence transformer 41, the push rod 43 is rotatably mounted between the linkage lever 231 and the electric leakage release 42, the zero sequence transformer 41 senses that the electric leakage current is fed back to the circuit board 35 of the coincidence gate module 3, the controller of the circuit board 35 controls the action of the electric leakage release 42, the ejector rod of the electric leakage release 42 pushes the actuating part 43d of the push rod 43 to rotate the push rod 43, the touch part 43e of the push rod 43 is matched with the touch part 131e of the lock catch 131 of the L-pole operating mechanism 13, so that the jump catch 132 and the lock catch 131 in the L-pole operating mechanism 13 are unlocked, the L-pole contact mechanism is opened, and simultaneously, the N-pole contact mechanism is opened under the action of the linkage lever 231.

As shown in fig. 12, the push rod 43 includes a push rod shaft 43a, the push rod shaft 43a is used for rotatably mounting the push rod 43 on the partition 5, a first limit boss 43b for cooperating with the return spring 44 is convexly provided at an upper portion of the push rod shaft 43a, the first limit boss 43b is T-shaped, a stepped push rod plate 43c is extended from a side wall of the push rod shaft 43a, an actuating portion 43d is extended upward along the axial direction of the push rod shaft 43a at one end corner of the push rod plate 43c away from the push rod shaft 43a, and a touching portion 43e is extended downward along the axial direction of the push rod shaft 43a at the other end corner of the push rod plate 43c away from the push rod shaft 43 a. The reset spring 44 is a torsion spring, the reset spring 44 is sleeved on the push rod shaft 43a of the push rod 43, one end of the reset spring 44 is connected with the first limit boss 43b on the push rod 43, and the other end of the reset spring 44 is matched with the second limit boss arranged on the partition plate 5.

The residual current action test circuit is used for generating simulated leakage current to enable the electric leakage tripper 42 to drive the N-pole contact mechanism to be switched off, the residual current action test circuit is provided with two connection and disconnection points, one connection and disconnection point is used as a first connection and disconnection point and is controlled to be disconnected or closed by the test button 45, the other connection and disconnection point is used as a second connection and disconnection point and is controlled to be disconnected or closed by the linkage lever 231, and any one of the first connection and disconnection point and the second connection and disconnection point can not enable the residual current action test circuit to be switched on. The problem of the circuit breaker under the disconnection condition, the human body electric shock danger that the long time pressed test button 45 and the electric leakage protection function that the long time pressed test button 45 and led to become invalid under the reverse connection condition has effectively been solved.

The residual current action test circuit comprises a first torsion spring 46, a second torsion spring 47 and a contact piece 47, wherein the first torsion spring 46 is installed on one side of a test button 45, a first elastic arm 461 of the first torsion spring 46 is matched with one end of the contact piece 47 to form a first connection point, the test button 45 is matched with the first elastic arm 461 of the first torsion spring 46, the first connection point is disconnected and closed by pressing the test button 45, and a second elastic arm 462 of the first torsion spring 46 is connected with a circuit board 35 of the superposed gate module 3 through a lead; the second torsion spring 47 is installed on one side of the N-pole operating mechanism, the end of the first elastic arm 471 of the second torsion spring 47 is matched with the other end of the contact piece 47 to form a second opening point, when the N-pole contact mechanism is opened and closed, the middle of the first elastic arm 471 of the second torsion spring 47 is pressed through the swinging action of the linkage lever 231 to open and close the second opening point, and the second elastic arm 472 of the second torsion spring 47 is connected with the N-pole wire inlet terminal 211 in the N-pole module 2 through a wire.

With reference to fig. 2, 6 and 7, an embodiment of a residual current operation testing circuit is provided, where the test button 45 is disposed on the upper portion of the N-phase pole module 2, and the test button 45 and the N-pole handle structure 22 are respectively disposed on two sides of the N-phase pole module 2; the residual current action test loop is arranged around the upper parts of the electric leakage tripping mechanism and the N-pole operating mechanism, and the residual current action test loop is arranged along the space between the electric leakage tripping device 42 and the N-pole handle structure 22 and the space between the linkage lever 231 and the test button 45 as well as the side wall of the phase pole module shell, so that the internal space utilization rate is improved. The first torsion spring 46 is installed on the partition 5 and located between the N-pole handle structure 22 and the test button 45, the contact piece 47 is installed on the other side of the test button 45, preferably, the contact piece 47 is L-shaped, one end of the contact piece extends toward the test button 45, the other end is installed close to the inner wall of one side of the phase module housing, the contact piece 47 and the first torsion spring 46 are respectively located on both sides of the test button 45, the first elastic arm 461 of the first torsion spring 46 is in limit fit with the test button 45, preferably, a slot for the first elastic arm 461 of the first torsion spring 46 to pass through is installed on the lower portion of the test button 45, the first elastic arm 461 of the first torsion spring 46 is contacted with or separated from one end of the contact piece 47 by pressing the test button 45, the second elastic arm 462 of the first torsion spring 46 is connected to the circuit board 35 of the superposition gate module 3 by a wire, the wire connected to the second elastic arm 462 of the first torsion spring 46 is installed around the side of the leakage release 42 away from the push rod 43, preferably, the second resilient arm 462 of the first torsion spring 46 is connected in series with a test resistor 49. The second torsion spring 47 is installed between the N-pole operating mechanism and the N-pole wire inlet terminal 211, the first elastic arm 471 of the second torsion spring 47 faces the other end of the contact piece 47 to form a second connection point, the second elastic arm 472 of the second torsion spring 47 is connected with the N-pole wire inlet terminal 211, preferably, a bending part 473 is arranged in the middle of the first elastic arm 471 of the second torsion spring 47, and the bending part 473 is used for being matched with the linkage lever 231. As shown in fig. 6, when the linking lever 231 drives the N-pole moving contact 241 to open, the linking lever 231 swings to the left side in the figure, the linking lever 231 no longer presses the bending part 473 to close the second breaking point, and at this time, pressing the test button 45 cannot turn on the residual current operation test loop, and the leakage tripping mechanism does not operate; as shown in fig. 7, when the linking lever 231 drives the N-pole moving contact 241 to close, the linking lever 231 swings to the right side in fig. 7 to press the bending part 473, so that the end of the first elastic arm 471 of the second torsion spring 47 contacts with the other end of the contact piece 47, the second on-off point is closed, at this time, the test button 45 is pressed to close the first on-off point, the residual current operation test loop is turned on, and the leakage tripping mechanism operates. Of course, a corresponding action portion may be protruded on the linking lever 231 for pressing the second elastic arm 472 of the second torsion spring 47 to achieve the conduction of the second connection point; and the contact piece 47 may be provided at other positions of the link lever 231.

Referring to fig. 6 and 7, a partition plate 5 is disposed between the L-phase pole module 1 and the N-phase pole module 2, a rotating shaft for rotatably mounting the push rod 43 and a second limit boss for connecting with the return spring 44 are disposed on the partition plate 5, a first linkage hole 51 is disposed on the partition plate 5, the first linkage hole 51 is used for the L-pole operating mechanism 13 to cooperate with the trigger portion 43e of the push rod 43, a second linkage hole 52 is disposed on the partition plate 5, the second linkage hole 52 is used for the linkage of the linkage lever 231 and the L-pole operating mechanism 13, and a limit structure for mounting the contact piece 47 may be further disposed on the partition plate 5.

The overlapping gate module 3 is used to drive the automatic switching on/off of the phase module, the overlapping gate module 3 may be disposed at a side close to the L-phase module 1, or may be disposed at a side close to the N-phase module 2, in this embodiment, the overlapping gate module 3 is disposed at a side of the L-phase module 1 as an example.

The coincident gate module 3 comprises a coincident gate module 3 shell, a driving handle 31, a gear transmission device 32, a tripping driving structure (not shown), a motor 33 and a circuit board 35 are arranged inside the coincident gate module 3 shell, the circuit board 35 is arranged inside the coincident gate module 3 shell, and the circuit board 35 is respectively connected with an L-pole incoming line terminal 111 and an N-pole incoming line terminal 211 and used for controlling power supply electricity taking or incoming line end temperature rise data feedback of the circuit board 35; the driving handle 31, the gear transmission device 32 and the motor 33 are arranged on the surface of the circuit board 35 in a stacked manner, the driving handle 31 is arranged on the upper portion of the reclosing module shell, the driving handle 31 and the gear transmission device 32 rotate in a matched manner through a driving connecting rod 34, the gear transmission device 32 is in transmission connection with the motor 33, the motor 33 drives the driving connecting rod 34 through the gear transmission device 32 to drive the driving handle 31 to realize automatic closing, the motor 33 is driven to rotate after a controller of the circuit board 35 receives a closing action signal, and the gear transmission device 32 and the driving connecting rod 34 are matched with each other to enable the L-pole operating mechanism 13 and the N-pole operating mechanism to act to realize automatic closing; the tripping driving structure is arranged on one side of the gear transmission device 32 facing the circuit board 35, the controller of the circuit board 35 receives a tripping action signal and then drives the motor 33 to rotate, and the L-pole operating mechanism 13 and the N-pole operating mechanism are tripped under the cooperation of the gear transmission device 32 and the tripping driving structure to realize automatic tripping; the reclosing module 3 is further provided with a wireless communication module for connecting with an external device, and sending control tasks such as automatic switching-on, automatic switching-off, switching-on prevention and the like to the controller of the circuit board 35 through the external device, and meanwhile, the communication module feeds back a normal working state, an electric leakage fault, a short circuit fault, an overload fault, an overvoltage and undervoltage and the like of the circuit breaker to the external device.

The driving handle 31 is arranged on the upper portion of the overlapped gate module 3, the motor 33 is arranged on the lower portion of the overlapped gate module 3, the gear transmission device 32 is arranged in the middle of the shell of the overlapped gate module 3, one end of the gear transmission device 32 is in transmission connection with the motor 33, the other end of the gear transmission device 32 is connected with the driving handle 31 through the driving connecting rod 34, a tripping driving structure is arranged on one side, facing the circuit board 35, of the gear transmission device 32 and used for being matched with a locking linkage shaft of the L-pole operating mechanism 13, and the tripping driving structure enables the L-pole module 1 and the N-pole module 2 to be switched off by pushing the locking linkage shaft of the L-pole operating mechanism 13 to act and under the linkage action.

As shown in fig. 11, the gear transmission device 32 includes three first gears 321, second gears 322 and third gears 323 which are engaged in sequence, wherein the first gear 321 is engaged with the motor 33 through a worm, a side driving link 34 which is away from the circuit board 35 is disposed on the third gear 323, one end of the driving link 34 is connected to one side of the third gear 323 as a connecting end, the other end of the driving link 34 is used as a driving end to cooperate with the third gear 323 for driving the driving handle 31 to rotate, a tripping driving structure is disposed on one side of the third gear 323 which faces the circuit board 35, the tripping driving structure includes a tripping driving member and a driving protrusion, one end of the tripping driving member is rotatably mounted on the housing of the coincidence gate module 3, the other end of the tripping driving member is disposed corresponding to the latch linkage shaft of the L-pole operating mechanism 13, the driving protrusion is disposed on one side of the third gear 323 which faces the circuit board 35 and is in contact connection with the tripping driving member through rotation, thereby driving the trip driving member to push the latch linkage shaft of the L-pole operating mechanism 13 to unlock the latch 131 and the jump latch 132 in the L-pole operating mechanism 13, and completing the trip operation. The tripping driving structure has the advantages of simple and reliable structure and convenience in resetting after tripping.

Referring to fig. 11, an embodiment of the driving handle 31 and the gear assembly 32 is provided, wherein the driving handle 31 has a protruding grip portion 311, a track groove 36 is disposed below the driving handle 31 for engaging with a driving end of the driving link 34, the driving link 34 slides along the track groove 36 as the third gear 323 performs the opening and closing rotation, and the driving end rotates the driving handle 31 by pushing the grip portion 311; when the motor 33 drives the gear transmission device 32 to perform closing rotation, the rotation direction of the third gear 323 is clockwise in the figure, at this time, the driving end of the driving link 34 slides from the inner end of the track groove 36 to the outer end of the track groove 36, the closing rotation of the driving handle 31 is realized by pushing the handle part 311 after the driving end contacts with the handle part 311, and the closing rotation direction of the driving handle 31 is anticlockwise; when the motor 33 drives the gear transmission device 32 to perform opening rotation, the rotation direction of the third gear 323 is counterclockwise in the drawing, at this time, the gear transmission device 32 enables the trip driving structure to drive the latch linkage shaft of the L-pole operating mechanism 13 to act, and enables the L-phase pole module 1 and the N-phase pole module 2 to complete tripping action under the linkage action, meanwhile, the gear transmission device 32 drives the driving end of the connecting rod 34 to slide from the outer end of the track groove 36 to the inner end of the track groove 36, and the handle portion 311 performs clockwise opening rotation after the driving end is removed from the pushing action. It should be noted that an avoiding groove for the driving protrusion of the third gear 323 to move is formed on the circuit board 35, and through holes for the locking linkage shaft to realize linkage and rotation are formed on the housing of the overlapping gate module 3 and the housing of the L-phase module 1.

The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.

Claims

1. The utility model provides a circuit breaker, includes the looks utmost point module that sets up side by side and is used for driving the automatic coincidence gate pole module (3) that divide-shut brake of looks utmost point module, its characterized in that: the phase pole module is divided into an L-phase pole module (1) and an N-phase pole module (2) by a partition plate (5), the L-phase pole module (1) comprises an L-pole operating mechanism (13), an L pole moving contact (141) of an L pole contact mechanism is connected on the L pole operating mechanism (13), the N phase pole module (2) comprises an N pole operating mechanism, an N pole contact mechanism and a leakage protection module, the N-pole operating mechanism comprises a linkage lever (231), one end of the linkage lever (231) penetrates through the partition plate (5) to be in linkage connection with the L-pole operating mechanism (13), the other end of the linkage lever (231) is connected with an N-pole moving contact (241) of the N-pole contact mechanism, under the action of the linkage connecting rod (133), the opening and closing of the N-phase pole module (2) are realized by driving an N-pole operating mechanism to drive an N-pole contact mechanism through the action of an L-pole operating mechanism (13);

the leakage protection module comprises a zero sequence transformer (41) and a leakage tripping mechanism, and when the zero sequence transformer (41) detects leakage current, the superposed gate module (3) drives the leakage tripping mechanism to act to enable the phase pole module to be switched off;

the residual current action test circuit is provided with two break points, one break point is controlled to be disconnected or closed by the test button (45) as a first break point, the other break point is controlled to be disconnected or closed by the linkage lever (231) as a second break point, and any one of the first break point and the second break point can not be switched on.

2. A circuit breaker according to claim 1, wherein: the residual current action test loop comprises a first torsion spring (46), a second torsion spring (47) and a contact piece (47), wherein the first torsion spring (46) is installed on one side of a test button (45), a first elastic arm (461) of the first torsion spring (46) is matched with one end of the contact piece (47) to form a first connection and disconnection point, the test button (45) is matched with the first elastic arm (461) of the first torsion spring (46), the first connection and disconnection point is disconnected and closed by pressing the test button (45), and a second elastic arm (462) of the first torsion spring (46) is connected with a circuit board (35) of the coincident gate module (3) through a lead; the second torsion spring (47) is installed on one side of the N-pole operating mechanism, the end part of a first elastic arm (471) of the second torsion spring (47) is matched with the other end of the contact piece (47) to form a second communication point, when the N-pole contact mechanism is switched on and switched off, the middle part of the first elastic arm (471) of the second torsion spring (47) is pressed through the swinging action of the linkage lever (231) to enable the second communication point to be disconnected and closed, and the second elastic arm (472) of the second torsion spring (47) is connected with an N-pole wire inlet terminal (211) in the N-pole module (2) through a wire.

3. A circuit breaker according to claim 2, wherein: a bending part (473) is arranged in the middle of the first elastic arm (471) of the second torsion spring (47), and the bending part (473) is used for being matched with the linkage lever (231) to realize the closing or opening of the second communication point.

4. A circuit breaker according to claim 1, wherein: the N-phase pole module (2) further comprises an N-pole incoming line terminal (211), an N-pole outgoing line terminal (212) and an N-pole handle structure (22), the N-pole incoming line terminal (211) and the N-pole outgoing line terminal (212) are respectively arranged on two sides of the N-phase pole module (2), the N-pole handle structure (22) and a test button (45) are arranged on the upper portion of the N-phase pole module (2), a zero-sequence transformer (41) is arranged on one side close to the N-pole outgoing line terminal (212), the zero-sequence transformer (41) is arranged on the lower portion of the N-phase pole module (2), the electric leakage tripping mechanism is arranged in the middle of the N-phase pole module (2) and is arranged between the N-pole handle structure (22) and the zero-sequence transformer (41), an N-pole operating mechanism and an N-pole contact mechanism are arranged between the electric leakage tripping mechanism and the N-pole incoming line terminal (211), and an N-pole moving contact (241) of the N-pole contact mechanism is connected to a linkage lever (231) of the N-pole operating mechanism, an N pole static contact (242) of the N pole contact mechanism is fixed on one side of the zero sequence transformer (41) and is arranged opposite to the N pole moving contact (241), and the residual current action circuit loop is arranged around the upper parts of the electric leakage tripping mechanism and the N pole operating mechanism.

5. A circuit breaker according to claim 4, wherein: the N-pole operating mechanism further comprises a tension spring (232), one end of the tension spring (232) is connected to the N-pole moving contact (241), and the other end of the tension spring (232) is fixedly installed and connected with a circuit board (35) of the superposed gate module (3) through a lead.

6. A circuit breaker according to any one of claims 1 to 5, wherein: the electric leakage tripping mechanism comprises an electric leakage tripping device (42), a push rod (43) and a reset spring (44) for driving the push rod (43), wherein the electric leakage tripping device (42) is arranged on a partition plate (5) and is connected with a circuit board (35) of the superposed gate module (3), the push rod (43) is rotatably arranged on the partition plate (5), the push rod (43) is provided with an actuating part (43d) matched with a push rod of the electric leakage tripping device (42) and a touch part (43e) which penetrates through the partition plate (5) and is matched with the L-pole operating mechanism (13), and when electric leakage occurs, the push rod of the electric leakage tripping device (42) drives the push rod (43) to rotate by overcoming the elastic force of the reset spring (44), so that the touch part (43e) pushes the L-pole operating mechanism (13) to act and the phase pole module is switched off under the linkage action of a linkage lever (231).

7. A circuit breaker according to claim 6, wherein: the device comprises a partition plate (5), a rotating shaft and a second limiting boss, wherein the rotating shaft is used for rotatably mounting a push rod (43), the second limiting boss is used for being connected with a reset spring (44), a first linkage hole (51) is formed in the partition plate (5), the first linkage hole (51) is used for matching an L pole operating mechanism (13) with a touch part (43e), a second linkage hole (52) is formed in the partition plate (5), and the second linkage hole (52) is used for linkage of a linkage lever (231) and the L pole operating mechanism (13).

8. A circuit breaker according to claim 6, wherein: the push rod (43) comprises a push rod shaft (43a) rotatably mounted on the partition plate (5), a first limiting boss (43b) matched with a reset spring (44) is arranged above the push rod shaft (43a) in a protruding mode, a step-shaped push rod plate (43c) extends from the side wall of one side of the push rod shaft (43a), an actuating portion (43d) extends upwards along the axial direction of the push rod shaft (43a) at one end corner of the push rod plate (43c) far away from the push rod shaft (43a), and a touch portion (43e) extends downwards along the axial direction of the push rod shaft (43a) at the other end corner of the push rod plate (43c) far away from the push rod shaft (43 a).

9. A circuit breaker according to claim 1, wherein: the L-phase pole module (1) comprises an L-pole incoming line terminal (111) and an L-pole outgoing line terminal (112) which are respectively arranged on two sides of the L-phase pole module (1), and an L-pole handle structure (12), an L-pole operating mechanism (13), an L-pole contact mechanism, short-circuit protection mechanisms (16) and (15), an arc extinguish chamber (15) and an overload tripping device (17) are arranged between the L-pole incoming line terminal (111) and the L-pole outgoing line terminal (112); the L-pole handle structure (12) is arranged on the upper part of the L-phase pole module (1), the L-pole operating mechanism (13) is arranged on one side of the L-pole handle structure (12), the L-pole handle structure (12) and the L-pole operating mechanism (13) are linked through a connecting rod (133), the L-pole operating mechanism (13) and the arc extinguish chamber (15) are arranged on the lower part of the L-phase pole module (1), the short-circuit protection mechanisms (16) and (15) are arranged between the L-pole handle structure (12) and the arc extinguish chamber (15), the short-circuit protection mechanisms (16) and (15) are opposite to the L-pole operating mechanism (13), an L-pole moving contact (141) of the L-pole contact mechanism is connected to the L-pole operating mechanism (13), an L-pole static contact (142) of the L-pole contact mechanism is fixedly arranged at one side of the arc extinguish chamber (15) and is opposite to the L-pole moving contact (141), the overload tripping device (17) is arranged between the L-pole wire inlet terminal (111) and the L-pole operating mechanism (13).

10. A circuit breaker according to claim 9, wherein: the L-pole operating mechanism (13) comprises a connecting rod (133), a lock catch (131), a jump buckle (132) and a contact support, the contact support is pivotally installed in the L-pole module (1) and rotates around a main shaft (135), the jump buckle (132) and the lock catch (131) are pivotally installed on the contact support and form a hasp connection, one end of the connecting rod (133) is connected with the L-pole handle structure (12), the other end of the connecting rod (133) is connected with the jump buckle (132), and an L-pole moving contact (141) is elastically and fixedly installed on the contact support.

11. A circuit breaker according to claim 10, wherein: the upper part of the lock catch (131) is provided with a rotating pair (131a), the rotating pair (131a) is used for rotatably mounting the lock catch (131) on the contact support, a locking part (131b) is arranged on one side of the revolute pair (131a), the locking part (131b) is used for matching with the jump buckle (132) to form a snap connection, a linkage shaft hole (131c) is arranged at the other side of the revolute pair (131a), a lock catch linkage shaft is arranged in the linkage shaft hole (131c), the lower part of the lock catch (131) is provided with a striking part (131d) and a triggering part (131e), the striking part (131d) is used for cooperating with a short-circuit protection mechanism (16) (15), the trigger part (131e) penetrates through the partition plate (5) and is used for being matched with the electric leakage tripping mechanism, the lower part of the lock catch (131) is also provided with a tripping hook (134), and the tripping hook (134) is used for matching with an overload tripping device (17); an avoidance notch (131f) avoiding the main shaft (135) is arranged on the lock catch (131), and the avoidance notch (131f) is positioned between the lock catch part (131b) and the impact part (131 d).

12. A circuit breaker according to claim 1, wherein: the superposition gate module (3) comprises a driving handle (31), a gear transmission device (32), a tripping driving structure, a motor (33) and a circuit board (35); the driving handle (31), the gear transmission device (32) and the motor (33) are arranged on the surface of the circuit board (35); the driving handle (31) and the gear transmission device (32) rotate in a matched mode through the driving connecting rods (34) (133), the gear transmission device (32) is in transmission connection with the motor (33), and the motor (33) drives the driving connecting rods (34) (133) to drive the driving handle (31) to achieve automatic switching-on through the gear transmission device (32); the tripping device comprises a gear transmission device (32), a tripping driving structure, a control circuit board (35), a tripping driving piece and a control circuit board, wherein the tripping driving structure is arranged on one side of the gear transmission device (32) facing the circuit board (35), the tripping driving structure comprises a driving boss arranged on the gear transmission device (32) and a tripping driving piece rotatably arranged on a housing of a coincidence gate module (3), one end of the tripping driving piece is rotatably arranged on the housing of the coincidence gate module (3), and the other end of the tripping driving piece is correspondingly arranged with a locking linkage shaft of an L-pole operating mechanism (13).