breaker

Abstract

A circuit breaker includes a phase pole module arranged in parallel and a reclosing gate pole module for driving the phase pole module to automatically open and close. The phase pole module is divided into an L phase pole module and an N phase pole module by a partition. The L phase pole module includes an L pole operating mechanism, and an L pole moving contact of an L pole contact mechanism is connected to the L pole operating mechanism. The N phase pole module includes a leakage protection module, and the leakage protection module includes a zero sequence mutual inductor, a leakage tripping mechanism, a test button and a residual current action test circuit. The leakage protection module also includes that the residual current action test circuit has two on-off points, one of which is controlled to be opened or closed by the test button as a first on-off point, and the other on-off point is controlled to be opened or closed by a linkage lever as a second on-off point. The residual current action test circuit cannot be turned on when either the first on-off point or the second on-off point is disconnected. To avoid safety hazards caused by long pressing the test button when the circuit breaker is disconnected or reversely wired.

Description

Technical Field

[0001] The invention relates to a low-voltage electrical appliance, in particular to a circuit breaker. Background Art

[0002] Low-voltage circuit breakers, also known as automatic air switches or automatic air circuit breakers, can be used to distribute electrical energy and protect lines and power equipment from overload and circuit breaker. They can also be used for infrequent line switching and infrequent motor starting. Existing circuit breakers are provided with a residual current action test circuit, which usually adopts a single breakpoint structure. The two ends of the residual current action test circuit of the single breakpoint structure are respectively connected to the outlet terminals of the adjacent two poles. When the user's power supply is reversed (i.e., the outlet terminal is connected to the power supply), the circuit breaker will not close when the power supply voltage is turned on. At this time, if the test button is pressed continuously, the residual current test circuit resistor will burn out or the tripper will explode, causing the leakage protection function of the circuit breaker to fail, posing a safety hazard. Summary of the invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide a circuit breaker with simple structure and high reliability.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A circuit breaker comprises a phase pole module arranged in parallel and a reclosing gate pole module for driving the phase pole module to automatically open and close, wherein the phase pole module is divided into an L phase pole module and an N phase pole module by a partition, wherein the L phase pole module comprises an L pole operating mechanism, and an L pole moving contact of an L pole contact mechanism is connected to the L pole operating mechanism, and the N phase pole module comprises an N pole operating mechanism, an N pole contact mechanism and a leakage protection module, wherein the N pole operating mechanism comprises a linkage lever, wherein one end of the linkage lever passes through the partition and is linked to the L pole operating mechanism, and the other end of the linkage lever is connected to the N pole moving contact of the N pole contact mechanism, and under the action of the linkage lever, the opening and closing of the N phase pole module is realized by the L pole operating mechanism driving the N pole operating mechanism to drive the N pole contact mechanism;

[0006] The leakage protection module includes a zero-sequence transformer and a leakage tripping mechanism. When the zero-sequence transformer detects leakage current, the reclosing gate module drives the leakage tripping mechanism to open the phase pole module.

[0007] The leakage protection module also includes a test button and a residual current action test circuit, the residual current action test circuit has two on-off points, one of which is used as a first on-off point and is controlled to be opened or closed by the test button, and the other on-off point is used as a second on-off point and is controlled to be opened or closed by a linkage lever. If either the first on-off point or the second on-off point is disconnected, the residual current action test circuit cannot be turned on.

[0008] Furthermore, the residual current action test circuit includes 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, the first elastic arm of the first torsion spring cooperates with one end of the contact piece to form a first on-off point, the test button cooperates with the first elastic arm of the first torsion spring, and the first on-off point is opened and closed by pressing the test button, and the second elastic arm of the first torsion spring is connected to the circuit board of the reclosing gate module through a wire; the second torsion spring is installed on one side of the N-pole operating mechanism, the end of the first elastic arm of the second torsion spring cooperates with the other end of the contact piece to form a second on-off point, and when the N-pole contact mechanism is opened and closed, the middle part of the first elastic arm of the second torsion spring is pressed by the swinging action of the linkage lever to open and close the second on-off point, and the second elastic arm of the second torsion spring is connected to the N-pole incoming terminal in the N-phase pole module through a wire.

[0009] Furthermore, a bending portion is provided in the middle of the first elastic arm of the second torsion spring, and the bending portion is used to cooperate with the linkage lever to realize the closing or opening of the second on-off point.

[0010] Furthermore, the N-phase pole module also includes an N-pole incoming terminal, an N-pole outgoing terminal and an N-pole handle structure, the N-pole incoming terminal and the N-pole outgoing terminal are respectively arranged on both sides of the N-phase pole module, the N-pole handle structure and the test button are arranged on the upper part of the N-phase pole module, the zero-sequence transformer is arranged on a side close to the N-pole outgoing terminal, and the zero-sequence transformer is located at the lower part of the N-phase pole module, the leakage tripping mechanism is arranged in the middle part of the N-phase pole module, and is located 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 leakage tripping mechanism and the N-pole incoming terminal, the N-pole moving contact of the N-pole contact mechanism is connected to the linkage lever of the N-pole operating mechanism, the N-pole static contact of the N-pole contact mechanism is fixed on one side of the zero-sequence transformer, and is arranged opposite to the N-pole moving contact, and the residual current action circuit loop is arranged around the leakage tripping mechanism and the upper part of the N-pole operating mechanism.

[0011] Furthermore, the N-pole operating mechanism also includes a tension spring, one end of which is connected to the N-pole moving contact, and the other end of which is fixedly installed and connected to the circuit board of the reclosing gate module through a wire.

[0012] Furthermore, the leakage release mechanism includes a leakage release, a push rod and a reset spring driving the push rod. The leakage release is installed on the partition and connected to the circuit board of the reclosing gate module. The push rod is rotatably installed on the partition. The push rod is provided with an actuating part cooperating with the top rod of the leakage release and a touch part passing through the partition and cooperating with the L-pole operating mechanism. When leakage occurs, the top rod of the leakage release drives the push rod to overcome the elastic force of the reset spring and rotates, so that the touch part pushes the L-pole operating mechanism to operate and, under the linkage action of the linkage lever, the phase pole module is opened.

[0013] Furthermore, a rotating shaft for rotatably mounting the push rod and a second limiting boss for connecting to a reset spring are provided on the partition, a first linkage hole is provided on the partition, the first linkage hole is used for cooperation between the L-pole operating mechanism and the triggering part, and a second linkage hole is provided on the partition, the second linkage hole is used for linkage between the linkage lever and the L-pole operating mechanism.

[0014] Furthermore, the push rod includes a push rod shaft for rotatably installed on the partition, a first limit boss for cooperating with a return spring is protruding above the push rod shaft, a step-shaped push rod plate is extended from one side wall of the push rod shaft, an actuating portion is extended upward along the axial direction of the push rod shaft at an end corner of the push rod plate away from the push rod shaft, and a touch portion is extended downward along the axial direction of the push rod shaft at the other end corner of the push rod plate away from the push rod shaft.

[0015] Furthermore, the L-phase pole module includes an L-pole incoming terminal and an L-pole outgoing terminal respectively arranged on both 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 extinguishing chamber and an overload release device are arranged between the L-pole incoming terminal and the L-pole outgoing terminal; the L-pole handle structure is arranged at the upper part of the L-phase pole module, the L-pole operating mechanism is arranged at one side of the L-pole handle structure, the L-pole handle structure and the L-pole operating mechanism are linked by a connecting rod, the L-pole operating mechanism and the arc extinguishing chamber are arranged at the lower part of the L-phase pole module, the short-circuit protection mechanism is arranged between the L-pole handle structure and the arc extinguishing chamber, and the short-circuit protection mechanism is opposite to the L-pole operating mechanism, the L-pole moving contact of the L-pole contact mechanism is connected to the L-pole operating mechanism, the L-pole static contact of the L-pole contact mechanism is fixedly arranged on one side of the arc extinguishing chamber and arranged opposite to the L-pole moving contact, and the overload release device is arranged between the L-pole incoming terminal and the L-pole operating mechanism.

[0016] Furthermore, the L-pole operating mechanism includes a connecting rod, a lock, a jumper and a contact support. The contact support is pivotally installed in the L-phase pole module and rotates around the main axis. The jumper and the lock are pivotally installed on the contact support and form a snap connection. One end of the connecting rod is connected to the L-pole handle structure, and the other end of the connecting rod is connected to the jumper. The L-pole moving contact is elastically fixed on the contact support.

[0017] Furthermore, a rotating pair is provided on the upper part of the lock, and the rotating pair is used to rotatably install the lock on the contact support. A lock part is provided on one side of the rotating pair, and the lock part is used to cooperate with the jump buckle to form a snap connection. A linkage shaft hole is provided on the other side of the rotating pair, and a lock linkage shaft is installed in the linkage shaft hole. An impact part and a trigger part are provided at the lower part of the lock, and the impact part is used to cooperate with the short-circuit protection mechanism, and the trigger part passes through the partition to cooperate with the leakage tripping mechanism. A tripping hook is also provided at the lower part of the lock, and the tripping hook is used to cooperate with the overload tripping device; an avoidance gap for avoiding the main shaft is provided on the lock, and the avoidance gap is located between the lock part and the impact part.

[0018] Furthermore, the reclosing gate module includes 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 cooperate to rotate through a driving connecting rod, the gear transmission device is connected to the motor, and the motor drives the driving connecting rod through the gear transmission device to drive the driving handle to realize automatic closing; the tripping driving structure is arranged on the side of the gear transmission device facing the circuit board, and the tripping driving structure includes a driving boss arranged on the gear transmission device and a tripping driving member rotatably installed on the housing of the reclosing gate module, one end of the tripping driving member is rotatably installed on the housing of the reclosing gate module, and the other end of the tripping driving member is arranged corresponding to the lock linkage shaft of the L-pole operating mechanism.

[0019] A circuit breaker of the present invention, a phase pole module and a reclosing gate pole module form a P+N structure, the phase pole module is divided into an L phase pole module and an N phase pole module by a partition, a residual current action test circuit with two on-off points is arranged in the N phase pole module, the two on-off points are respectively operated by a test button and a linkage lever of an N pole operating mechanism, this test button circuit with two on-off points solves the problem of the risk of electric shock to people caused by long pressing the test button when the circuit breaker is disconnected and the problem of failure of the leakage protection function caused by long pressing the test button in the case of reverse wiring.

[0020] In addition, a tension spring is provided on the N-pole moving contact, which can provide a closing driving force for the N-pole moving contact and also enable the circuit board of the reclosing gate module to draw power from the N-pole. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1-2 It is a structural schematic diagram of a circuit breaker of the present invention;

[0022] Figure 3 It is a structural schematic diagram of an L-phase pole module in a circuit breaker of the present invention;

[0023] Figure 4 It is a structural schematic diagram of an L-pole operating mechanism in a circuit breaker of the present invention;

[0024] Figure 5 It is a structural schematic diagram of a lock in a circuit breaker of the present invention;

[0025] Figure 6 It is a structural schematic diagram of an N-phase pole module in a circuit breaker of the present invention (opening);

[0026] Figure 7 It is a structural schematic diagram of an N-phase pole module in a circuit breaker of the present invention (closing);

[0027] Figure 8It is a structural schematic diagram of an N-pole moving contact in a circuit breaker of the present invention;

[0028] Fig. 9 It is a structural schematic diagram of a linkage lever in a circuit breaker of the present invention;

[0029] Fig.10 It is a structural schematic diagram of a swing connecting rod in a circuit breaker of the present invention;

[0030] Fig.11 It is a structural schematic diagram of a reclosing gate module in a circuit breaker of the present invention;

[0031] Fig.12 It is a structural schematic diagram of a push rod in a circuit breaker of the present invention;

[0032] Fig.13 It is a schematic diagram of electrical connections in a circuit breaker of the present invention. DETAILED DESCRIPTION

[0033] The following is combined with Figures 1 to 13 The embodiments given are used to further illustrate the specific implementation of a circuit breaker of the present invention. The circuit breaker of the present invention is not limited to the description of the following embodiments.

[0034] A circuit breaker comprises a phase pole module arranged in parallel and a reclosing gate pole module 3 for driving the phase pole module to automatically open and close, wherein the phase pole module is divided into an L phase pole module 1 and an N phase pole module 2 by a partition 5, wherein the L phase pole module 1 comprises an L pole operating mechanism 13, and an L pole moving contact 141 of an L pole contact mechanism is connected to the L pole operating mechanism 13, and the N phase pole module 2 comprises an N pole operating mechanism, an N pole contact mechanism and a leakage protection module, wherein the N pole operating mechanism comprises a linkage lever 231, wherein one end of the linkage lever 231 passes through the partition 5 and is linked to the L pole operating mechanism 13, and the other end of the linkage lever 231 is connected to an N pole moving contact 241 of the N pole contact mechanism, and under the action of the linkage lever 231, the opening and closing of the N phase pole module 2 is realized by the L pole operating mechanism 13 driving the N pole operating mechanism to drive the N pole contact mechanism;

[0035] The leakage protection module includes a zero-sequence transformer 41 and a leakage tripping mechanism. When the zero-sequence transformer 41 detects leakage current, the reclosing gate module 3 drives the leakage tripping mechanism to open the phase pole module.

[0036] The leakage protection module also includes a test button 45 and a residual current action test circuit, wherein the residual current action test circuit has two on-off points, wherein one on-off point is used as a first on-off point and is controlled to be opened or closed by the test button 45, and the other on-off point is used as a second on-off point and is controlled to be opened or closed by the linkage lever 231. If either the first on-off point or the second on-off point is disconnected, the residual current action test circuit cannot be turned on.

[0037] A circuit breaker of the present invention, a phase pole module and a reclosing gate pole module 3 form a 1P+N structure, the phase pole module is divided into an L phase pole module 1 and an N phase pole module 2 by a partition 5, a residual current action test circuit with two on-off points is arranged in the N phase pole module 2, the two on-off points are respectively operated by a test button 45 and a linkage lever 231 of an N pole operating mechanism, this test button 45 circuit with two on-off points solves the problem of the risk of electric shock to people caused by long pressing the test button 45 when the circuit breaker is disconnected and the problem of failure of the leakage protection function caused by long pressing the test button 45 in the case of reverse wiring.

[0038] Combination Figure 1-13 Provided is an embodiment, a circuit breaker, comprising a phase pole module and a reclosing gate pole module 3 arranged in parallel, the phase pole module comprising a phase pole module housing, a partition 5 is arranged inside the phase pole module housing, the partition 5 divides the cavity inside the phase pole module housing into two chambers, an L phase pole module 1 and an N phase pole module 2 are respectively installed in the two chambers, the L phase pole module 1 and the N phase pole module 2 are independent of each other and are linked, the L phase pole module 1 comprises an 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 The linkage lever 231 is a movable lever 231, one end of the linkage lever 231 passes through the partition 5 and is linked to the L-pole operating mechanism 13, and the other end of the linkage lever 231 is connected to the N-pole movable contact 241 in the N-pole contact mechanism, wherein the N-pole operating mechanism is different from the L-pole operating mechanism 13 in structure, and 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 pole module is opened and closed, the L-pole operating mechanism 13 realizes the opening and closing of the L-phase pole module 1, and at the same time, through the linkage action of the linkage lever 231, the N-phase pole module 2 is also opened and closed.

[0039] like Figure 1-5 As shown, the L-phase pole 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 release device 17. The L-pole handle structure 12 is linked with the driving handle 31 of the reclosing gate pole module 3 through a handle linkage shaft. The reclosing gate pole module 3 drives the L-pole handle structure 12 through the handle linkage shaft to realize automatic closing of the phase pole module; when a short circuit occurs in the main line, the electromagnetic system in the short-circuit protection mechanism 16 is actuated to drive the L-pole operating mechanism 13 to trip and realize opening of the circuit breaker module; when an overload occurs in the main line, the double metal component of the overload release device 17 is actuated to drive the L-pole operating mechanism 13 to trip and realize opening of the phase pole module.

[0040] Combination Figure 2-5The L-phase pole module 1 is introduced in detail. The L-phase pole module 1 includes an L-pole incoming terminal 111 and an L-pole outgoing terminal 112 respectively arranged on both sides of the L-phase pole module 1. 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 extinguishing chamber 15 and an overload release device 17 are arranged 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 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, and the L-pole handle structure 12 and the L-pole operating mechanism 13 are arranged on the upper part of the L-phase pole module 1. The mechanism 13 is linked by a connecting rod 133, the arc extinguishing chamber 15 is arranged at the lower part of the L-phase pole module 1, the short-circuit protection mechanism 16 is arranged between the L-pole handle structure 12 and the arc extinguishing chamber 15, and the short-circuit protection mechanism 16 is opposite to the L-pole operating mechanism 13, the L-pole moving contact 141 of the L-pole contact mechanism is connected to the L-pole operating mechanism 13, the L-pole static contact 142 of the L-pole contact mechanism is fixedly arranged on one side of the arc extinguishing chamber 15 and is opposite to the L-pole moving contact 141, and the overload release device 17 is arranged between the L-pole incoming terminal 111 and the L-pole operating mechanism 13.

[0041] like Figure 3-5 As shown, the L-pole operating mechanism 13 includes a connecting rod 133, a lock 131, a tripping lock 132 and a contact support, and the contact support is pivotally installed in the L-phase pole module 1, as shown in FIG. Figure 4 As shown, the contact support is rotatably mounted on the main shaft 135, and the contact support rotates around the main shaft 135. The jumper 132 and the lock 131 are pivotally mounted on the contact support and form a snap connection. One end of the connecting rod 133 is connected to the L-pole handle structure 12, and the other end of the connecting rod 133 is connected to the jumper 132. The L-pole moving contact 141 is elastically fixed on the contact support by a spring. After the lock 131 and the jumper 132 form a snap connection, the L-pole handle structure 12 is operated to drive the L-pole moving contact 141 to rotate in the closing direction. At this time, the lock 131 in the snap structure rotates around the main shaft 135. Preferably, an avoidance notch 131f for avoiding the main shaft 135 is provided on the lock 131. Figure 5The lock buckle 131 is introduced. A rotating pair 131a is provided at the upper part of the lock buckle 131. The rotating pair 131a is used to rotate the lock buckle 131 on the contact support. A lock buckle part 131b is provided on one side of the rotating pair 131a. The lock buckle part 131b is protruded toward the direction of the trip buckle 132. The lock buckle part 131b is used to cooperate with the trip buckle 132 to form a buckle connection. A linkage shaft hole 131c is provided on the other side of the rotating pair 131a. A lock buckle linkage shaft is installed in the linkage shaft hole 131c. The lock buckle linkage shaft extends into the reclosing gate module 3 and is used to cooperate with the tripping drive structure of the reclosing gate module 3 to realize automatic opening. A locking mechanism 131 is provided at the lower part of the lock buckle 131. The impact part 131d and the trigger part 131e, the impact part 131d faces the side of the electromagnetic release of the short-circuit protection mechanism 16 with a striker, and the impact part 131d is used to cooperate with the short-circuit protection mechanism 16 to realize the short-circuit protection of the circuit breaker; the trigger part 131e passes through the partition 5 to cooperate with the push rod 43 of the leakage tripping mechanism, and is used to trip the circuit breaker and cut off the power when a leakage fault occurs; a tripping hook 134 is also provided at the lower part of the lock buckle 131, one end of the tripping hook 134 is connected to the lock buckle 131, and the other end of the lock buckle 131 faces the overload tripping device 17 of the L-phase pole module 1, and is used to cooperate with the overload tripping device 17 to realize the overload protection of the circuit breaker. The avoidance notch 131f of the lock buckle 131 is preferably as follows Figure 5 As shown, the avoidance gap 131f is an arc-shaped groove, and is located between the locking portion 131b and the impact portion 131d.

[0042] The short-circuit protection mechanism 16 includes an electromagnetic release, which includes an electromagnetic coil. A striker is provided at one end of the electromagnetic coil. The striker is opposite to the striker portion 131d of the lock buckle 131. When a short circuit occurs in the main line, the movement of the striker causes the lock buckle 131 to rotate, and the buckle connection between the lock buckle 131 and the jump buckle 132 is unlocked, and the phase pole module is opened.

[0043] The overload release device 17 includes a bimetallic component, which includes a bimetallic strip, and an arc-striking plate and a connecting piece are fixedly connected on both sides of one end of the bimetallic strip, and one end of the three forms a fixed end of the bimetallic component; the bimetallic strip is located between the arc-striking plate and the connecting piece, and the other end of the bimetallic strip serves as the movable end of the bimetallic component, and the movable end of the bimetallic component corresponds to the trip 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 to the L-pole incoming terminal 111.

[0044] Combination Figure 1 , 2, 6-10, and 12 introduce the N-phase pole module 2, which includes an N-pole incoming terminal 211 and an N-pole outgoing terminal 212. The N-pole incoming terminal 211 and the N-pole outgoing terminal 212 are respectively arranged on both sides of the N-phase pole module 2, and an N-pole handle structure 22, an N-pole operating mechanism and an N-pole contact mechanism are arranged between the N-pole incoming terminal 211 and the N-pole outgoing terminal 212. The N-pole handle structure 22 is arranged on the upper part of the N-phase pole module 2, and the N-pole handle structure 22 is linked with the L-pole handle structure 12 through a handle linkage shaft, so that the L-pole handle structure 12 swings together with the L-pole handle structure 12 when the phase pole module is opened and closed. The N-pole operating mechanism includes a linkage lever 231, and the N-pole contact mechanism includes an N-pole moving contact 241 and an N-pole static contact 242. One end of the linkage lever 231 passes through the partition 5 and is linked to the L-pole operating mechanism 13, and the other end of the linkage lever 231 is connected to the N-pole moving contact 241. The N-pole static contact 242 is fixedly installed in the N-phase pole module 2, and the N-pole static contact 242 is arranged opposite to the N-pole moving contact 241. The linkage lever 231 drives the N-pole moving contact 241 to move under the linkage action of the L-pole operating mechanism 13 to realize the opening and closing of the N-phase pole module 2. As the linkage lever 231 swings, the N-pole contact mechanism performs opening and closing actions.

[0045] like Figure 8-10 As shown, a first connecting hole 231a is provided at one end of the linkage lever 231, and the first connecting hole 231a is used for rotationally connecting with the rotating pair 131a of the lock 131, and a connecting shaft 231b is provided at the other end of the linkage lever 231, and the connecting shaft 231b is protruded toward the side away from the L-phase pole module 1, and the N-pole moving contact 241 and the swing link 243 are rotatably mounted on the connecting shaft 231b, and the other end of the swing link 243 and the middle part of the N-pole moving contact 241 are jointly mounted on a fixed swing shaft 244 in the N-phase pole module 2. When the L-pole operating mechanism 13 rotates clockwise around the main shaft 135 for closing, the linkage lever 231 also rotates clockwise, and the linkage lever 231 drives the swing link 243 to rotate clockwise. At this time, the swing link 243 drives the N-pole moving contact 241 to rotate clockwise. Since the swing link 243 and the N-pole moving contact 241 are connected to the unfixed, suspended connecting shaft 231b, and the swing shaft 244 is fixed inside the N-phase pole module 2, 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 rotate clockwise. Figure 8 Similarly, when the L-pole operating mechanism 13 drives the N-pole moving contact 241 to open the gate, the linkage lever 231 moves to the right side under the action of the swing link 243. Figure 8 The left side swing returns to its initial position.

[0046] A tension spring 232 is also provided in the N-pole operating mechanism, one end of which is connected to the N-pole moving contact 241, and the other end of the tension spring 232 is fixedly installed and connected to the circuit board 35 of the reclosing gate module 3 through a wire. The tension spring 232 provides a closing driving force for the opening and closing of the N-pole contact mechanism, and at the same time enables the circuit board 35 of the reclosing gate module 3 to draw power from the N-phase pole module 2.

[0047] The leakage protection module arranged in the N-phase pole module 2 includes a leakage tripping mechanism, a zero-sequence transformer 41, a test button 45 and a residual current action test circuit for generating a simulated leakage current. When the zero-sequence transformer 41 detects a leakage current or a simulated leakage current, the controller of the reclosing pole module 3 drives the leakage tripping mechanism to open the phase pole module, wherein the opening of the N-phase pole module 2 needs to be achieved with the aid of the L-pole operating mechanism 13 of the L-phase pole module 1.

[0048] The leakage tripping mechanism includes a leakage tripper 42, a push rod 43 and a reset spring 44 driving the push rod 43. The leakage tripper 42 is installed on the partition 5 and connected to the circuit board 35 of the reclosing gate module 3. The push rod 43 is rotatably installed on the partition 5. The push rod 43 is provided with an actuating portion 43d matched with the top rod of the leakage tripper 42 and a touch portion 43e passing through the partition 5 and matched with the L-pole operating mechanism 13. When leakage occurs, the top rod of the leakage tripper 42 drives the push rod 43 to rotate to overcome the elastic force of the reset spring 44, so that the touch portion 43e pushes the L-pole operating mechanism 13 to operate and, under the linkage action of the linkage lever 231, the phase pole module is opened.

[0049] The zero-sequence transformer 41 is used to sense the leakage current of the main line or simulate the leakage current. The zero-sequence transformer 41 is arranged at the lower part of the N-phase pole module 2. The main lines of the N-phase pole module 2 and the L-phase pole module 1 pass through the zero-sequence transformer 41. The leakage release 42 is arranged between the N-pole handle structure 22 and the zero-sequence transformer 41. The push rod 43 is rotatably installed between the linkage lever 231 and the leakage release 42. The zero-sequence transformer 41 senses the leakage current to the reclosing gate module 3. The circuit board 35 provides feedback, and the controller of the circuit board 35 controls the leakage release 42 to operate. The top rod of the leakage release 42 pushes the actuating portion 43d of the push rod 43 to rotate the push rod 43. The actuating portion 43e of the push rod 43 cooperates with the triggering portion 131e of the lock 131 of the L-pole operating mechanism 13, so that the tripping portion 132 and the lock 131 in the L-pole operating mechanism 13 are unlocked, and the L-pole contact mechanism is opened. At the same time, under the action of the linkage lever 231, the N-pole contact mechanism is opened.

[0050] like Fig.12As shown, the push rod 43 includes a push rod shaft 43a, which is used to rotatably install the push rod 43 on the partition 5. A first limiting boss 43b for cooperating with the return spring 44 is protruded from the upper part of the push rod shaft 43a. The first limiting boss 43b is T-shaped. A step-shaped push rod plate 43c is extended from one 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. A touch portion 43e is extended downward along the axial direction of the push rod shaft 43a at another end corner of the push rod plate 43c away from the push rod shaft 43a. The return spring 44 is a torsion spring. The return spring 44 is sleeved on the push rod shaft 43a of the push rod 43. One end of the return spring 44 is connected to the first limiting boss 43b on the push rod 43, and the other end of the return spring 44 is matched with the second limiting boss provided on the partition 5.

[0051] The leakage protection module also includes a test button 45 and a residual current action test circuit, the residual current action test circuit is used to generate a simulated leakage current to actuate the leakage release 42 to drive the N-pole contact mechanism to open, and the residual current action test circuit has two on-off points, one of which is controlled to be opened or closed by the test button 45 as the first on-off point, and the other on-off point is controlled to be opened or closed by the linkage lever 231 as the second on-off point, and the residual current action test circuit cannot be turned on if either the first on-off point or the second on-off point is disconnected. This effectively solves the risk of electric shock caused by long pressing the test button 45 when the circuit breaker is disconnected and the problem of failure of the leakage protection function caused by long pressing the test button 45 in the case of reverse wiring.

[0052] The residual current action test circuit includes a first torsion spring 46, a second torsion spring 47 and a contact piece 48. The first torsion spring 46 is installed on one side of the test button 45. The first elastic arm 461 of the first torsion spring 46 cooperates with one end of the contact piece 48 to form a first on-off point. The test button 45 cooperates with the first elastic arm 461 of the first torsion spring 46. The first on-off point is opened and closed 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 reclosing gate module 3 through a wire; 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 cooperates with the other end of the contact piece 48 to form a second on-off point. When the N-pole contact mechanism is opened and closed, the middle part of the first elastic arm 471 of the second torsion spring 47 is pressed by the swinging action of the linkage lever 231 to open and close the second on-off point. The second elastic arm 472 of the second torsion spring 47 is connected to the N-pole incoming terminal 211 in the N-phase pole module 2 through a wire.

[0053] Combination Figure 2 , 67 provides an embodiment of a residual current operation test circuit, wherein the test button 45 is arranged on the upper part of the N-phase pole module 2, and the test button 45 and the N-pole handle structure 22 are respectively on both sides of the N-phase pole module 2; the residual current operation test circuit is arranged around the upper part of the leakage release mechanism and the N-pole operating mechanism, and the residual current operation test circuit is arranged along the space between the leakage release 42 and the N-pole handle structure 22, and in the space between the linkage lever 231 and the test button 45, and the side wall of the phase pole module housing, thereby improving the internal space utilization. The first torsion spring 46 is installed on the partition 5 and is located between the N-pole handle structure 22 and the test button 45. The contact piece 48 is arranged on the other side of the test button 45. Preferably, the contact piece 48 is L-shaped, one end of which extends toward the test button 45, and the other end is arranged close to the inner wall of one side of the phase pole module housing. The contact piece 48 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 limitedly matched with the test button 45. Preferably, a slot for the first elastic arm 461 of the first torsion spring 46 to pass through is provided at the lower part of the test button 45. By pressing the test button 45, the first elastic arm 461 of the first torsion spring 46 is in contact with or separated from one end of the contact piece 48. The second elastic arm 462 of the first torsion spring 46 is connected to the circuit board 35 of the reclosing gate module 3 through a wire. The wire connected to the second elastic arm 462 of the first torsion spring 46 is arranged around the side of the leakage release 42 away from the push rod 43. Preferably, the second elastic 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 incoming terminal 211. The first elastic arm 471 of the second torsion spring 47 is arranged toward the other end of the contact piece 48 to form a second on-off point. The second elastic arm 472 of the second torsion spring 47 is connected to the N-pole incoming terminal 211. Preferably, a bending portion 473 is provided in the middle of the first elastic arm 471 of the second torsion spring 47. The bending portion 473 is used to cooperate with the linkage lever 231. Figure 6 As shown in FIG. 2 , when the linkage lever 231 drives the N-pole moving contact 241 to open, the linkage lever 231 swings to the left in the figure, and the linkage lever 231 no longer presses the bent portion 473 to close the second on-off point. At this time, pressing the test button 45 cannot turn on the residual current action test circuit, and the leakage tripping mechanism does not act. Figure 7 As shown, when the linkage lever 231 drives the N-pole moving contact 241 to close, the linkage lever 231 moves to Figure 7The right side of the swing presses the bent portion 473, so that the end of the first elastic arm 471 of the second torsion spring 47 contacts the other end of the contact piece 48, and the second on-off point is closed. At this time, pressing the test button 45 closes the first on-off point, the residual current action test circuit is turned on, and the leakage trip mechanism is activated. Of course, a corresponding action portion can also be protruded on the linkage lever 231 to press the second elastic arm 472 of the second torsion spring 47 to achieve the conduction of the second on-off point; and the contact piece 48 can also be set at other positions of the linkage lever 231.

[0054] See also Figure 6 , 7 A partition 5 is arranged between the L-phase pole module 1 and the N-phase pole module 2, and a rotating shaft for rotatably mounting the push rod 43 and a second limiting boss for connecting with the reset spring 44 are arranged on the partition 5. A first linkage hole 51 is arranged on the partition 5, and the first linkage hole 51 is used for the L-pole operating mechanism 13 to cooperate with the touch portion 43e of the push rod 43. A second linkage hole 52 is arranged on the partition 5, and the second linkage hole 52 is used for the linkage between the linkage lever 231 and the L-pole operating mechanism 13. A limiting structure for installing the contact piece 48 can also be arranged on the partition 5.

[0055] The reclosing gate module 3 is used to drive the automatic opening and closing of the phase pole module. The reclosing gate module 3 can be set on the side close to the L phase pole module 1, or on the side close to the N phase pole module 2. In this embodiment, the reclosing gate module 3 is set on the side of the L phase pole module 1 as an example.

[0056] The reclosing gate module 3 includes a reclosing gate module 3 housing, and a driving handle 31, a gear transmission device 32, a tripping drive structure (not shown), a motor 33 and a circuit board 35 are arranged inside the reclosing gate module 3 housing. The circuit board 35 is arranged inside the reclosing gate module 3 housing, and the circuit board 35 is respectively connected to the L-pole incoming terminal 111 and the N-pole incoming terminal 211, and is used to control the power supply of the circuit board 35 or the incoming terminal temperature rise data feedback; the driving handle 31, the gear transmission device 32 and the motor 33 are arranged on the surface of the circuit board 35, and are arranged in a stacked manner. The driving handle 31 is arranged on the upper part of the reclosing module housing, and the driving handle 31 and the gear transmission device 32 are rotated in coordination with each other through a driving connecting rod 34, and the gear transmission device 32 is connected to the motor 33 in transmission, and 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. After the controller of the circuit board 35 receives the closing action signal, the motor 33 is driven to rotate, and the gear transmission device 32 and the driving connecting rod 34 cooperate with each other to make the L-pole operating mechanism 13 and the N-pole operating mechanism actuated to realize automatic closing; the tripping drive structure is arranged on the side of the gear transmission device 32 facing the circuit board 35, and after the controller of the circuit board 35 receives the opening action signal, the motor 33 is driven to rotate, and under the cooperation of the gear transmission device 32 and the tripping drive structure, the L-pole operating mechanism 13 and the N-pole operating mechanism are tripped to realize automatic opening; the reclosing gate module 3 is also provided with a wireless communication module for connecting with an external device, and sending control tasks to the controller of the circuit board 35 through the external device, such as automatic closing, automatic opening, anti-closing, etc. At the same time, the communication module feeds back the normal working state of the circuit breaker, leakage fault, short circuit fault, overload fault, over-voltage and under-voltage to the external device.

[0057] The driving handle 31 is arranged at the upper part of the reclosing gate module 3, the motor 33 is arranged at the lower part of the reclosing gate module 3, the gear transmission device 32 is arranged in the middle part of the housing of the reclosing gate module 3, one end of the gear transmission device 32 is connected to the motor 33, and the other end of the gear transmission device 32 is connected to the driving handle 31 through a driving connecting rod 34. A tripping driving structure is provided on the side of the gear transmission device 32 facing the circuit board 35. The tripping driving structure is used to cooperate with the locking linkage shaft of the L-pole operating mechanism 13. The tripping driving structure drives the locking linkage shaft of the L-pole operating mechanism 13 and enables the L-phase pole module 1 and the N-phase pole module 2 to be opened under the linkage action.

[0058] like Fig.11As shown, the gear transmission device 32 includes three sequentially meshed first gears 321, second gears 322 and third gears 323, wherein the first gear 321 meshes with the motor 33 through a worm, and a driving connecting rod 34 is provided on the third gear 323 on a side away from the circuit board 35, one end of the driving connecting rod 34 is connected to one side of the third gear 323 as a connecting end, and the other end of the driving connecting rod 34 is used as a driving end to cooperate with the third gear 323 to drive the driving handle 31 to rotate, and a driving connecting rod 34 is provided on the side of the third gear 323 facing the circuit board 35. There is a tripping drive structure, which includes a tripping drive member and a driving protrusion. One end of the tripping drive member is rotatably mounted on the housing of the reclosing gate module 3, and the other end of the tripping drive member is arranged corresponding to the lock linkage shaft of the L-pole operating mechanism 13. The driving protrusion is arranged on the side of the third gear 323 facing the circuit board 35 and is connected to the tripping drive member by rotation, thereby driving the tripping drive member to push the lock linkage shaft of the L-pole operating mechanism 13 to unlock the lock 131 and the jumper 132 in the L-pole operating mechanism 13, completing the tripping action. Such a tripping drive structure has the advantages of simple and reliable structure and easy reset after tripping.

[0059] Combination Fig.11 , an embodiment of the cooperation between a driving handle 31 and a gear transmission device 32 is provided, wherein the driving handle 31 has a protruding handle portion 311, and a track groove 36 for cooperating with a driving end of a driving connecting rod 34 is provided below the driving handle 31. As the third gear 323 is opened and closed, the driving connecting rod 34 slides along the track groove 36, and the driving end rotates the driving handle 31 by pushing the handle portion 311; when the motor 33 drives the gear transmission device 32 to close and rotate, the rotation direction of the third gear 323 in the figure is clockwise, and at this time, the driving end of the driving connecting rod 34 slides from the inner end of the track groove 36 to the outer end of the track groove 36, and the driving end and the handle are connected. After the contact of the part 311, the driving handle 31 is driven to rotate in closing by pushing the handle part 311, and the closing rotation direction of the driving handle 31 is counterclockwise; when the motor 33 drives the gear transmission device 32 to rotate in opening, the rotation direction of the third gear 323 in the figure is counterclockwise, at this time, the gear transmission device 32 makes the tripping drive structure drive the lock linkage shaft of the L-pole operating mechanism 13 to move, and under the linkage action, the L-phase pole module 1 and the N-phase pole module 2 complete the tripping action, and at the same time, 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 part 311 is removed from the driving end. The push action is rotated clockwise. It should be noted that an avoidance groove for the driving protrusion of the third gear 323 to move is provided on the circuit board 35, and a through hole for the lock linkage shaft to realize linkage and rotation is provided on the housing of the reclosing gate module 3 and the housing of the L-phase pole module 1.

[0060] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A circuit breaker, comprising phase pole modules arranged in parallel and a reclosing gate pole module (3) for driving the phase pole modules to automatically open and close, 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 (5); the L phase pole module (1) comprises an L pole operating mechanism (13), and an L pole moving contact (141) of an L pole contact mechanism is connected to 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 (5) and is linked to the L pole operating mechanism (13); the other end of the linkage lever (231) is connected to an N pole moving contact (241) of the N pole contact mechanism; under the action of the linkage lever (231), the opening and closing of the N phase pole module (2) is achieved by the L pole operating mechanism (13) driving the N pole operating mechanism to drive the N pole contact mechanism; The leakage protection module comprises a zero-sequence transformer (41) and a leakage tripping mechanism. When the zero-sequence transformer (41) detects leakage current, the reclosing gate module (3) drives the leakage tripping mechanism to open the phase pole module. The leakage protection module also includes a test button (45) and a residual current action test circuit, wherein the residual current action test circuit has two on-off points, wherein one on-off point is used as a first on-off point and is controlled to be opened or closed by the test button (45), and the other on-off point is used as a second on-off point, wherein the second on-off point is located between the N-pole operating mechanism and the N-pole incoming line terminal (211) in the N-phase pole module, and is controlled to be opened or closed by the swing of a linkage lever (231), and the residual current action test circuit cannot be turned on if either the first on-off point or the second on-off point is disconnected.

2. A circuit breaker according to claim 1, characterized in that: The residual current action test circuit comprises a first torsion spring (46), a second torsion spring (47) and a contact piece (48); the first torsion spring (46) is installed on one side of the test button (45); the first elastic arm (461) of the first torsion spring (46) cooperates with one end of the contact piece (48) to form a first on-off point; the test button (45) cooperates with the first elastic arm (461) of the first torsion spring (46); the first on-off point is opened and closed by pressing the test button (45); the second elastic arm (462) of the first torsion spring (46) is connected to the reclosing gate module through a wire (3) is connected to the circuit board (35); the second torsion spring (47) is installed on one side of the N-pole operating mechanism, and the end of the first elastic arm (471) of the second torsion spring (47) cooperates with the other end of the contact piece (48) to form a second on-off point. When the N-pole contact mechanism is opened or closed, the middle part of the first elastic arm (471) of the second torsion spring (47) is pressed by the swinging action of the linkage lever (231) to open and close the second on-off point, and the second elastic arm (472) of the second torsion spring (47) is connected to the N-pole incoming terminal (211) in the N-phase pole module (2) through a wire.

3. A circuit breaker according to claim 2, characterized in that: A bending portion (473) is provided in the middle of the first elastic arm (471) of the second torsion spring (47), and the bending portion (473) is used to cooperate with the linkage lever (231) to realize the closing or opening of the second on-off point.

4. A circuit breaker according to claim 1, characterized in that: 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 both sides of the N-phase pole module (2); the N-pole handle structure (22) and the test button (45) are arranged on the upper part of the N-phase pole module (2); the zero-sequence mutual inductor (41) is arranged on a side close to the N-pole outgoing line terminal (212), and the zero-sequence mutual inductor (41) is located at the lower part of the N-phase pole module (2); and the leakage tripping mechanism is arranged on the N-phase pole module The invention relates to a circuit block (2) in the middle of the circuit block (2) and 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 leakage tripping mechanism and the N-pole incoming terminal (211). The N-pole moving contact (241) of the N-pole contact mechanism is connected to the linkage lever (231) of the N-pole operating mechanism. The N-pole static contact (242) of the N-pole contact mechanism is fixed on one side of the zero-sequence transformer (41) and arranged opposite to the N-pole moving contact (241). The residual current action circuit loop is arranged around the leakage tripping mechanism and the upper part of the N-pole operating mechanism.

5. A circuit breaker according to claim 4, characterized in that: The N-pole operating mechanism also includes a tension spring (232), one end of which is connected to the N-pole moving contact (241), and the other end of which is fixedly installed and connected to the circuit board (35) of the reclosing gate module (3) via a wire.

6. A circuit breaker according to any one of claims 1 to 5, characterized in that: The leakage tripping mechanism comprises a leakage tripping device (42), a push rod (43) and a reset spring (44) for driving the push rod (43). The leakage tripping device (42) is mounted on a partition (5) and connected to a circuit board (35) of a reclosing gate module (3). The push rod (43) is rotatably mounted on the partition (5). An actuating portion (43d) matched with a top rod of the leakage tripping device (42) and a contact portion (43e) passing through the partition (5) and matched with an L-pole operating mechanism (13) are arranged on the push rod (43). When leakage occurs, the top rod of the leakage tripping device (42) drives the push rod (43) to rotate to overcome the elastic force of the reset spring (44), so that the contact portion (43e) pushes the L-pole operating mechanism (13) to operate and, under the linkage action of a linkage lever (231), the phase pole module is opened.

7. A circuit breaker according to claim 6, characterized in that: The partition plate (5) is provided with a rotating shaft for rotatably mounting the push rod (43) and a second limiting boss for connecting with the reset spring (44); the partition plate (5) is provided with a first linkage hole (51), the first linkage hole (51) is used for the L-pole operating mechanism (13) to cooperate with the touch portion (43e); the partition plate (5) is provided with a second linkage hole (52), the second linkage hole (52) is used for the linkage of the linkage lever (231) with the L-pole operating mechanism (13).

8. A circuit breaker according to claim 6, characterized in that: The push rod (43) includes a push rod shaft (43a) rotatably mounted on the partition (5), a first limiting boss (43b) protruding above the push rod shaft (43a) for cooperating with a reset spring (44), a step-shaped push rod plate (43c) extending from a side wall of one side of the push rod shaft (43a), an actuating portion (43d) extending upward along the axial direction of the push rod shaft (43a) at an end corner of the push rod plate (43c) away from the push rod shaft (43a), and a touch portion (43e) extending downward along the axial direction of the push rod shaft (43a) at another end corner of the push rod plate (43c) away from the push rod shaft (43a).

9. A circuit breaker according to claim 1, characterized in that: The L-phase pole module (1) comprises an L-pole incoming terminal (111) and an L-pole outgoing terminal (112) respectively arranged on both sides of the L-phase pole module (1); 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 extinguishing chamber (15) and an overload release device (17) are arranged 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 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), and the L-pole handle structure (12) and the L-pole operating mechanism (13) are connected via a connecting rod ( 133), the L-pole operating mechanism (13) and the arc extinguishing chamber (15) are arranged at the lower part of the L-phase pole module (1), the short-circuit protection mechanism (16) is arranged between the L-pole handle structure (12) and the arc extinguishing chamber (15), and the short-circuit protection mechanism (16) is opposite to the L-pole operating mechanism (13), the L-pole moving contact (141) of the L-pole contact mechanism is connected to the L-pole operating mechanism (13), the L-pole static contact (142) of the L-pole contact mechanism is fixedly arranged on one side of the arc extinguishing chamber (15) and arranged opposite to the L-pole moving contact (141), and the overload release device (17) is arranged between the L-pole incoming line terminal (111) and the L-pole operating mechanism (13).

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

11. A circuit breaker according to claim 10, characterized in that: A rotating pair (131a) is provided at the upper part of the lock buckle (131), and the rotating pair (131a) is used to rotate the lock buckle (131) on the contact support. A lock buckle part (131b) is provided on one side of the rotating pair (131a), and the lock buckle part (131b) is used to cooperate with the jump buckle (132) to form a buckle connection. A linkage shaft hole (131c) is provided on the other side of the rotating pair (131a), and a lock buckle linkage shaft is installed in the linkage shaft hole (131c). A striking part (131d) and a contact support are provided at the lower part of the lock buckle (131). The triggering part (131e) is used to cooperate with the short-circuit protection mechanism (16); the triggering part (131e) passes through the partition (5) and is used to cooperate with the leakage tripping mechanism; a tripping hook (134) is also provided at the lower part of the lock buckle (131); the tripping hook (134) is used to cooperate with the overload tripping device (17); and a avoidance notch (131f) for avoiding the main shaft (135) is provided on the lock buckle (131); the avoidance notch (131f) is located between the lock buckle part (131b) and the impact part (131d).

12. A circuit breaker according to claim 1, characterized in that: The reclosing gate module (3) comprises a driving handle (31), a gear transmission device (32), a release 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 coordination with each other through a driving connecting rod (34); the gear transmission device (32) and the motor (33) are connected in transmission; 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 release driving structure is arranged on a side of the gear transmission device (32) facing the circuit board (35); the release driving structure comprises a driving boss arranged on the gear transmission device (32) and a release driving member rotatably mounted on the housing of the reclosing gate module (3); one end of the release driving member is rotatably mounted on the housing of the reclosing gate module (3); and the other end of the release driving member is arranged corresponding to the locking linkage shaft of the L-pole operating mechanism (13).

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