An electrical leakage circuit breaker

Abstract

The application discloses a leakage circuit breaker, which comprises an L-phase pole module, an N-phase pole module, a reclosing pole module and a leakage protection module. The leakage protection module is arranged in the N-phase pole module and the reclosing pole module. A test button circuit is arranged in the leakage protection module. The on-off of the test button circuit is controlled by a test button arranged in the reclosing pole module. An indicator lamp is arranged on a circuit board of the reclosing pole module. The indicator lamp comprises a test button arranged on the reclosing pole module and a light-emitting element arranged in the reclosing pole module. The test button is arranged near the light-emitting element. The test button is used as a light guide column to guide the working state of the light-emitting element out of the reclosing pole module, and the working state of the circuit breaker is displayed. The test button of the application is used as the light guide column of the indicator lamp. When the test button is pressed, the indicator lamp will not pop out, and the size of the circuit breaker can be reduced.

Description

Technical Field

[0001] The present invention relates to a circuit breaker, in particular to a leakage circuit breaker. Background Art

[0002] Leakage circuit breakers are mainly used as protective devices to prevent electric shock and electrical fires when the insulation of circuits or electrical appliances is damaged and a short circuit to the ground occurs. Existing leakage circuit breakers are equipped with a test device for generating simulated leakage action. However, since this test device occupies a large space in the circuit breaker, it is not conducive to the miniaturization of the product and has defects such as unreliable contact. In addition, existing leakage circuit breakers also have leakage indication devices, usually two buttons are set on the circuit breaker, one is a leakage test button, and the other is a leakage indication button; the traditional leakage indication button uses a mechanical interlocking device. When the circuit breaker trips due to a leakage fault, the indicator is actuated to indicate that the circuit breaker has tripped due to leakage. This method of setting the indicator and the test button separately is not conducive to the miniaturization of the circuit breaker. Summary of the Invention

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

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

[0005] A leakage circuit breaker comprises an L-phase pole module, an N-phase pole module, a reclosing gate module and a leakage protection module, wherein the leakage protection modules are dispersedly arranged in the N-phase pole module and the reclosing gate module, a test button circuit is provided in the leakage protection module, the on and off of the test button circuit is controlled by a test button arranged in the reclosing gate module, an indicator light is provided on the circuit board of the reclosing gate module, the indicator light comprises a test button passed through the reclosing gate module and a light-emitting element arranged inside the reclosing gate module, the test button is arranged near the light-emitting element, and the test button serves as a light-guiding column to export the working status of the light-emitting element to the outside of the reclosing gate module for displaying the working status of the circuit breaker.

[0006] Furthermore, the light emitting element is a light emitting diode, which is arranged on the circuit board near a test button, and the test button is a translucent part made of PC material.

[0007] Furthermore, the leakage protection module includes a zero-sequence mutual inductor, a leakage release and a test button circuit. The zero-sequence mutual inductor and the leakage release are arranged in the N-phase pole module, the test button circuit is arranged in the reclosing pole module, and the leakage release and the test button circuit are connected to the circuit board of the reclosing pole module.

[0008] After the zero-sequence transformer detects the leakage current, the controller on the circuit board of the reclosing gate module drives the leakage release to operate and open the circuit breaker;

[0009] Or when the test button circuit is turned on, the zero-sequence transformer detects the simulated leakage current generated by the test button circuit, and the controller of the circuit board of the reclosing gate module drives the leakage release to operate and open the circuit breaker.

[0010] Furthermore, the conduction and disconnection of the test button circuit is controlled by a micro switch, and the micro switch is arranged on the circuit board of the reclosing gate module. The leakage test button is arranged on the reclosing gate module to cooperate with the micro switch to make the test button circuit conduction or disconnection.

[0011] Furthermore, the reclosing gate module includes a reclosing gate module housing, and the test button is penetrated through the upper part of the reclosing gate module housing. The test button has two pressing parts, one of which serves as a first pressing part and is slidably penetrated through an installation slot provided on the reclosing gate module housing, and the other pressing part serves as a second pressing part and is used to press the micro switch of the circuit board located inside the reclosing gate module housing.

[0012] Furthermore, a mutually cooperating limiting structure is provided between the test button and the reclosing gate module housing, and the limiting structure is used to limit the stroke of the test button extending out of the reclosing gate module housing. The limiting structure includes a first limiting boss provided inside the reclosing gate module housing and a second limiting boss provided on the test button. The first limiting boss is opposite to the first pressing portion, and the second limiting boss protrudes on one side of the test button for cooperating with the inner wall of the reclosing gate module housing.

[0013] Furthermore, a return spring is provided between the first limiting boss and the first pressing portion.

[0014] Furthermore, the reclosing gate module includes a reclosing gate module housing, and a driving handle, a gear transmission device, a tripping driving structure, a motor, a circuit board and a test button are provided inside the reclosing gate module housing. The circuit board is arranged inside the reclosing gate module housing, and the driving handle, the gear transmission device and the motor are arranged on the surface of the circuit board. The driving handle and the test button are respectively arranged on both sides of the upper part of the reclosing gate module housing, the motor is arranged at the lower part of the reclosing gate module, and the gear transmission device is arranged in the middle part of the reclosing gate module housing. One end of the gear transmission device is connected to the motor, and the other end of the gear transmission device is connected to the driving handle through a driving connecting rod; the tripping driving structure is arranged on the side of the gear transmission device facing the circuit board, and the tripper driving structure includes a driving boss arranged on the gear transmission device and a tripping driving member rotatably mounted on the reclosing gate module housing.

[0015] Furthermore, a toggle switch is provided in the reclosing gate module. The toggle switch is located between the driving handle and the test button. The toggle switch is driven to set the circuit breaker module to manual mode or automatic mode. The toggle switch includes a toggle switch and a push plate. The toggle switch is provided on the circuit board. The push plate is provided on the surface of the toggle switch for pushing the toggle switch. An opening corresponding to the push plate is provided on the reclosing gate module for pushing the push plate.

[0016] Furthermore, the N-phase pole module includes an N-phase pole module shell, and an N-pole handle structure, an N-pole operating mechanism, an N-pole contact mechanism and a pair of N-pole wiring terminals are arranged inside the N-phase pole module shell; the pair of N-pole wiring terminals are respectively arranged on both sides of the N-phase pole module shell as the N-pole input terminal and the N-pole output terminal, the N-pole handle structure and the N-pole operating mechanism are arranged on the upper part of the N-phase pole module shell, the N-pole moving contact in the N-pole contact mechanism is connected to the N-pole operating mechanism, the N-pole moving contact is located in the middle of the N-phase pole module shell, and the N-pole static contact of the N-pole contact mechanism is fixedly installed in the middle of the N-phase pole module shell and is arranged opposite to the N-pole moving contact; a zero-sequence transformer and a leakage release are provided between the N-pole output terminal and the N-pole static contact, and the leakage release is arranged between the zero-sequence transformer and the N-pole handle structure.

[0017] A leakage circuit breaker of the present invention is provided with a test button circuit operated by a test button in the reclosing gate module, and an indicator light for indicating the working status of the circuit breaker is provided in the reclosing gate module. The light-emitting element of the indicator light is arranged near the test button, and the test button serves as a light guide column to guide the light of the light-emitting element out of the reclosing gate module to display the working status of the circuit breaker. Compared with the prior art, this structure in which the test button also serves as the light guide column of the indicator light does not pop out when the test button is pressed. In addition, this structure is conducive to reducing the size of the circuit breaker, while avoiding the need for too many mounting holes on the circuit breaker and can intuitively display the working status of the circuit breaker.

[0018] In addition, the on-off of the test button circuit is controlled by a microswitch, which is arranged on the circuit board. The test button realizes the on-off of the test button circuit by pressing the microswitch, which is conducive to reducing the size of the circuit breaker; a mutually cooperating limiting structure is provided between the test button and the housing of the reclosing gate module. The limiting structure is used to limit the stroke of the test button extending out of the housing of the reclosing gate module. Under the action of the limiting structure, the test button can be prevented from popping out too much when pressing the test button. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of a leakage circuit breaker of the present invention;

[0020] Figure 2 yes Figure 1 sectional view of

[0021] Figure 3 This is a schematic diagram of the internal structure of a leakage circuit breaker of the present invention;

[0022] Figure 4 This is a structural diagram of an L-phase pole module of a leakage circuit breaker of the present invention;

[0023] Figure 5 This is a structural schematic diagram of an L-phase pole cover of a leakage circuit breaker of the present invention;

[0024] Figure 6-7 This is a structural diagram of an N-phase pole module of a leakage circuit breaker of the present invention;

[0025] Figure 8 This is a structural schematic diagram of an N-phase pole cover of a leakage circuit breaker of the present invention;

[0026] Figure 9 It is a structural schematic diagram of a reclosing gate module of a leakage circuit breaker of the present invention;

[0027] Figure 10 yes Figure 9 A magnified view of part A;

[0028] Figure 11 It is a structural schematic diagram of a reclosing gate module of a leakage circuit breaker of the present invention;

[0029] Figure 12 The present invention is a schematic structural diagram of a circuit board of a leakage circuit breaker. DETAILED DESCRIPTION

[0030] The following is combined with Figures 1 to 12 The following embodiments are provided to further illustrate the specific implementation of a leakage circuit breaker of the present invention. The leakage circuit breaker of the present invention is not limited to the description of the following embodiments.

[0031] A leakage circuit breaker, such as Figure 1-3As shown, it includes an L-phase pole module 1, an N-phase pole module 2, a reclosing gate module 3, and a leakage protection module. The N-phase pole module 2 is arranged between the L-phase pole module 1 and the reclosing gate module 3, and the leakage protection module is dispersed in the N-phase pole module 2 and the reclosing gate module 3. This shortens the length of the wire connection between the leakage protection module and the reclosing gate module 3, improves assembly and welding efficiency, and facilitates overall miniaturization. The L-phase pole module 1 includes an L-pole handle structure 14, an L-pole operating mechanism 15, and an L-pole contact mechanism 16. The N-phase pole module 2 includes an N-pole handle structure 24, an N-pole operating mechanism 25, and an N-pole contact mechanism 26. The reclosing gate module 3 includes a driving handle 31. The driving handle 31 is linked to the L-pole handle structure 14 and the N-pole handle structure 24 via a handle linkage shaft. After receiving the closing action command, the reclosing gate module 3, under the action of the handle linkage shaft, enables the L-phase pole module 1 and the N-phase pole module 2 to realize the automatic closing function. Of course, the L-phase pole module may also be arranged between the N-phase pole module and the reclosing gate pole module to achieve the same function.

[0032] like Figure 3 、 8 -11 A driving handle 31, a circuit board 35, a gear transmission device 32, a tripping drive structure and a motor 33 are installed in the reclosing pole module 3. The driving handle 31 is linked with the L-pole handle structure 14 and the N-pole handle structure 24. The L-pole operating mechanism 15 is linked with the N-pole operating mechanism 25 and is also linked with the tripping drive structure. The driving handle 31 is driven and connected to the gear transmission device 32 through a driving connecting rod 34. When the controller of the circuit board 35 receives a closing action signal, the motor 33 and the gear transmission device 32 rotate and drive the driving connecting rod 34 to rotate. The driving connecting rod 34 rotates the driving handle 31. The driving handle 31 drives the L-pole handle structure 14 and the N-pole handle structure 24 to rotate and activate the L-pole operating mechanism 15 and the N-pole operating mechanism 25 to achieve automatic closing. When the controller of the circuit board 35 receives an opening action signal, the motor 33 and the gear transmission device 32 cause the L-pole operating mechanism 15 and the N-pole operating mechanism 25 to operate synchronously through the tripping drive structure to achieve automatic opening.

[0033] The leakage protection module realizes the automatic tripping function through the reclosing gate module 3. After the leakage protection module detects the leakage signal, the leakage protection module trips the circuit breaker through the reclosing gate module 3. The leakage protection module also includes a test button circuit. When the test button circuit is turned on, the leakage protection module can also drive the circuit breaker to trip through the reclosing gate module 3.

[0034] like Figure 6 、 9As shown in Figure 10, the leakage protection module includes a zero-sequence transformer 41, a leakage release 42 and a test button circuit. The zero-sequence transformer 41 and the leakage release 42 are arranged in the N-phase pole module 2, and the test button circuit is arranged in the reclosing pole module 3. The leakage release 42 and the test button circuit are connected to the circuit board 35 of the reclosing pole module 3. The conduction and disconnection of the test button circuit are controlled by a micro switch 44. The micro switch 44 is arranged on the circuit board 35 in the reclosing pole module 3. A test button 43 is provided in the reclosing pole module 3. The test button 43 is used to cooperate with the micro switch 44 to make the test button circuit conductive or disconnected. After the zero-sequence transformer 41 detects the leakage current, the controller of the circuit board 35 of the reclosing gate module 3 drives the leakage release 42 to operate and open the circuit breaker; when the test button circuit is turned on, the zero-sequence transformer 41 detects the simulated leakage current generated by the test button circuit, and the controller of the circuit board 35 of the reclosing gate module 3 drives the leakage release 42 to operate and open the circuit breaker.

[0035] An improvement of the present application is that a dual-metal component for implementing overload protection is not provided in the L-phase pole module 1. Instead, a current transformer 19 is provided to collect current signals to determine whether an overload occurs in the main line of the circuit breaker. The current transformer 19 is connected to the circuit board 35 of the reclosing pole module 3 to feedback the current signal of the main line, and the controller on the circuit board 35 can feedback the power consumption of the main line to the user end. When an overcurrent occurs in the main line of the circuit breaker, the current transformer 19 feeds back the main line current magnitude signal to the controller of the circuit board 45. After the controller determines that an overload occurs, the controller of the circuit board 35 drives the reclosing pole module 3 to operate within a specified time to realize automatic opening of the circuit breaker. The controller is provided with a control module, which is used to determine whether the current feedback current of the current transformer is an overload current and to control the motor 3 of the reclosing pole module 3. Preferably, the control module of the controller can trigger the reclosing pole module 3 to operate within a specified time according to a set program. This overload protection has higher stability and accuracy than the existing dual-metal component. The controller of the reclosing gate module 3 may be a microprocessor MCU, or a control circuit composed of electronic components, preferably a microprocessor MCU.

[0036] like Figure 4 、 5As shown, the L-phase pole module 1 includes a pair of L-pole incoming terminals 12 and L-pole outgoing terminals 13 arranged on both sides of the L-phase pole module 1, an L-pole handle structure 14 and an L-pole operating mechanism 15 are provided between the L-pole incoming terminal 12 and the L-pole outgoing terminal 13, an L-pole moving contact of an L-pole contact mechanism 16 is connected to the L-pole operating mechanism 15, a current transformer 19 is provided between the L-pole moving contact and the L-pole incoming terminal 12, a connecting wire 1a connected between the L-pole moving contact and the L-pole incoming terminal 12 passes through the current transformer 19, and the current transformer 19 is connected to the circuit board 35 of the reclosing gate module 3 for feeding back the current signal of the main line to the controller of the circuit board 35.

[0037] Specific as Figure 4 As shown, the L-phase pole module 1 includes an L-phase pole module housing, and a pair of L-pole terminals, an L-pole operating mechanism 15, an L-pole contact mechanism 16, a short-circuit protection mechanism 17, an arc extinguishing chamber 18 and a current transformer 19 are arranged inside the phase pole module housing. A pair of L-pole terminals are respectively arranged on both sides of the L-phase pole module 1 as the L-pole incoming terminal 12 and the L-pole outgoing terminal 13, respectively. The L-pole operating mechanism 15 is arranged at the upper part of the interior of the L-phase pole module housing and is located between the L-pole incoming terminal 12 and the L-pole outgoing terminal 13. The short-circuit protection mechanism 17 and the arc extinguishing chamber 18 are arranged on one side of the L-pole operating mechanism 15, and the arc extinguishing chamber 18 is located below the short-circuit protection mechanism 17 and on one side of the arc extinguishing chamber 18. An L-pole contact mechanism 16 is provided, wherein the L-pole static contact of the L-pole contact mechanism 16 is fixed on one side of the arc extinguishing chamber 18, the L-pole moving contact in the L-pole contact mechanism 16 is connected to the L-pole operating mechanism 15, and the L-pole moving contact and the L-pole static contact are arranged opposite to each other, and the current transformer 19 is arranged on the other side of the L-pole moving contact, and the connecting wire 1a connected between the L-pole moving contact and the L-pole incoming terminal 12 passes through the current transformer 19, and the current transformer 19 is connected to the circuit board 35 of the reclosing gate module 3 through the wire, and a first arc-starting plate 1b is provided below the current transformer 19, one end of the first arc-starting plate 1b is connected to the L-pole incoming terminal 12 through a wire, and the other end of the first arc-starting plate 1b extends into the arc extinguishing chamber 18.

[0038] The L-pole operating mechanism 15 includes a support, a lever, a tripper, a lock and a contact support. The support is rotatably installed in the L-phase pole module housing, the tripper and the lock are rotatably installed on the support, the contact support is connected to the support, one end of the lever is connected to the L-pole handle structure 141, and the other end is connected to the tripper, the tripper is snap-connected to one end arm of the lock, one end of the contact support is connected to the L-pole moving contact of the L-pole contact mechanism 16, and the L-pole moving contact is arranged opposite to the L-pole static contact fixed in the L-phase pole module housing; one side of the other end arm of the lock is arranged opposite to the electromagnetic release in the short-circuit protection mechanism 17, and an assembly hole is provided in the middle of the lock, and an L-pole lock linkage shaft 151 is installed in the assembly hole, and the L-pole lock linkage shaft 151 connects the L-pole operating mechanism 15 and the N-pole lock linkage 251 of the N-pole operating mechanism 25.

[0039] The short-circuit protection mechanism 17 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 one end arm of the lock. When a short circuit occurs in the main line, the movement of the striker causes the lock to rotate, and the hasp connection between the lock and the tripping buckle is unlocked, and the circuit breaker module is opened.

[0040] like Figure 4 、 5 As shown, an arc isolation structure is provided in the middle of the L-phase module housing, and the arc isolation structure includes a first partition 111 and a plurality of second partitions 112. The first partition 111 is arranged between the L-pole moving contact and the current transformer 19, and is used to prevent the arc or high-temperature gas from flowing into the space where the current transformer 19 is located, so as to prevent the arc or high-temperature gas from affecting the current transformer 19; the plurality of second partitions 112 are arranged at intervals to form an unclosed buffer chamber 113, and the buffer chamber 113 is located between the L-pole output terminal 13 and the arc extinguishing chamber 18. The arc discharged from the arc extinguishing chamber 18 by the plurality of second partitions 112 arranged at intervals is cut into multiple sections, wherein part of the arc flows into the buffer chamber 113 for cooling the arc exhaust gas. Preferably, the buffer chamber 113 formed by the plurality of second partitions 112 arranged at intervals has multiple arc exhaust gas inlets, Figure 4 、 5 The buffer chamber 113 has two entrances, one of which is opposite to the arc extinguishing chamber 18, which is conducive to the arc exhaust gas discharged from the arc extinguishing chamber 18 to flow smoothly into the buffer chamber 113 and be buffered by the cold zone, and the other entrance corresponds to the exhaust hole of the L-phase pole module shell.

[0041] Preferably, the L-phase pole module housing is composed of an L-phase pole cover 11b and an L-phase pole base 11a. A first partition 111 is provided on each of the L-phase pole cover 11b and the L-phase pole base 11a. A plurality of second partitions 112 are provided on each of the L-phase pole cover 11b and the L-phase pole base 11a. When the L-phase pole cover 11b and the L-phase pole base 11a are combined to form the L-phase pole module housing, the first partitions 111 provided on the L-phase pole cover 11b and the L-phase pole base 11a are butted together to block arcs or high-temperature gases, and the plurality of second partitions 112 provided on the L-phase pole cover 11b and the L-phase pole base 11a are butted together to form a buffer chamber. Of course, the first partition 111 and the second partition 112 may be provided only on the L-phase pole base 11a. When the L-phase pole cover 11b is combined with the L-phase pole base 11a, the first partition 111 and the second partition 112 are in contact with the L-phase pole cover 11b. It should be noted that at least two through holes are provided on the L-phase pole cover 11 b , one of which is used for the L-pole locking linkage shaft 151 to pass through, and the other is used to realize the linkage of the L-pole handle structure 14 and the N-pole handle structure 24 .

[0042] like Figure 3 、 6 As shown in Figures 7 and 8, the N-phase pole module 2 includes an N-phase pole module shell, inside of which are arranged an N-pole handle structure 24, an N-pole operating mechanism 25, an N-pole contact mechanism 26 and a pair of N-pole wiring terminals, and the structures and arrangement positions of the four are the same as the L-pole handle structure 14, the L-pole operating mechanism 15, the L-pole contact mechanism 16 and the L-pole wiring terminals in the L-phase pole module 1.

[0043] like Figure 6 、 7 As shown, the N-pole handle structure 24 is linked with the L-pole handle structure 14, the N-pole operating mechanism 25 is the same as the L-pole operating mechanism 15 and is linked through the L-pole lock linkage shaft 151 set on the L-pole operating mechanism 15. The N-pole lock linkage shaft 251 in the N-pole operating mechanism 25 is used to cooperate with the tripping drive structure in the reclosing gate module 3. The tripping drive structure drives the N-pole lock linkage shaft 251 of the N-pole operating mechanism 25 to rotate. Under the linkage action of the L-pole lock linkage shaft 151 of the L-pole operating mechanism 15, the L-pole operating mechanism 15 and the N-pole operating mechanism 25 are synchronously tripped, thereby realizing synchronous opening of the L-phase pole module 1 and the N-phase pole module 2.

[0044] The pair of N-pole terminals are respectively arranged on both sides of the N-phase pole module housing, wherein one N-pole terminal serves as the N-pole outlet terminal 23, and the other N-pole terminal serves as the N-pole input terminal 22. The N-pole handle structure 24 and the N-pole operating mechanism 25 are arranged on the upper part of the N-phase pole module housing, and the N-pole moving contact in the N-pole contact mechanism 26 is connected to the N-pole operating mechanism 25, and the N-pole moving contact is connected to the N-pole input terminal 22 through a wire. The N-pole moving contact is located in the middle of the N-phase pole module housing, and the N-pole static contact of the N-pole contact mechanism 26 is fixedly installed in the middle of the N-phase pole module housing and is arranged opposite to the N-pole moving contact, and the N-pole static contact is connected to the N-pole outlet terminal 23 through a wire; a second arc-starting plate 2b is also provided in the N-phase pole module housing, and one end of the second arc-starting plate 2b is connected to the N-pole input terminal 22 through a wire.

[0045] The zero-sequence mutual inductor 41 and the leakage release 42 of the leakage protection module are provided in the N-phase pole module 2. The zero-sequence mutual inductor 41 and the leakage release 42 are provided between the N-pole outlet terminal 23 and the N-pole static contact. The main circuit wire of the L-phase pole module 1 and the main circuit wire in the N-phase pole module 2 need to pass through the zero-sequence mutual inductor 41. The zero-sequence mutual inductor 41 and the leakage release 42 are connected to the circuit board 35 in the reclosing gate module 3 through a wire. The leakage release 42 is provided between the zero-sequence mutual inductor 41 and the N-pole handle structure 24. The tripping core of the tripping device 42 is opposite to the lock of the N-pole operating mechanism 25. When the tripping core of the leakage release 42 is actuated, the lock and tripping of the N-pole operating mechanism 25 can be triggered to unlock, and synchronous opening is achieved under the linkage of the N-pole operating mechanism 25 and the L-pole operating mechanism 15. Preferably, a magnetic yoke 421 is covered on the leakage release 42, and the magnetic yoke 421 covers the leakage release 42 to enhance the electromagnetic force of the leakage release 42, so that the leakage release 42 can be miniaturized or can still operate reliably at low voltage (for example, 12V).

[0046] like Figure 6 、 7As shown, a third partition 211 is further provided in the N-phase pole module housing, and the third partition 211 is provided between the N-pole moving contact and the N-pole incoming terminal 22, and is used to prevent the arc back-spray that occurs during the disconnection process of the N-pole contact mechanism 26; preferably, an arc extinguishing cavity 212a is provided between the third partition 211 and the zero-sequence mutual inductor 41, and one end of the second arc-starting plate 2b extends into the arc extinguishing cavity 212a, and an arc running channel 212b is provided at the end of the arc extinguishing cavity 212a, and the arc running channel 212b is connected to the exhaust hole provided on one side of the N-phase pole module housing, and the arc extinguishing cavity 212a includes a first chamber wall 212 and a second chamber wall 212. Chamber wall 213, the first chamber wall 212 is located in the middle of the N-phase pole module housing, the head end of the first chamber wall 212 is located in the middle of the N-phase pole module housing, the middle of the first chamber wall 212 is arranged around one side of the zero-sequence transformer 41, and a gap is left between the part of the first chamber wall 212 close to the tail end and the inner wall of the N-phase pole module housing as an arc running channel 212b, the tail end of the first chamber wall 212 is opposite to the exhaust hole of the N-phase pole module housing, the head end of the second chamber wall 213 is connected to the third partition plate 211, and the tail end of the second chamber wall 213 is connected to the inner wall of one side of the N-phase pole module housing with the exhaust hole.

[0047] Preferably, the N-phase pole module housing is composed of an N-phase pole cover 21b and an N-phase pole base 21a, and a third partition 211 is provided on both the N-phase pole cover 21b and the N-phase pole base 21a, and a first chamber wall 212 and a second chamber wall 213 are provided on both the N-phase pole cover 21b and the N-phase pole base 21a. When the N-phase pole cover 21b and the N-phase pole base 21a are covered to form the N-phase pole module housing, the third partition 211 provided on the N-phase pole cover 21b and the N-phase pole base 21a are docked to form a structure for preventing arc backspray, and the first chamber wall 212 and the second chamber wall 213 provided on the L-phase pole cover 11b and the L-phase pole base 11a are respectively docked to form an arc extinguishing chamber 212a. Of course, the third partition plate 211, the first chamber wall 212, and the second chamber wall 213 can be provided only on the N-phase pole base 21a. When the N-phase pole cover 21b is attached to the N-phase pole base 21a, the third partition plate 211, the first chamber wall 212, and the second chamber wall 213 are in contact with the N-phase pole cover 21b. It should be noted that the N-phase pole cover 21b is provided with a through hole for the N-pole handle structure 24 to be linked to the driving handle 31 of the reclosing gate module 3.

[0048] like Figure 3 、 9 As shown in FIG. 12 , the reclosing gate module 3 includes a reclosing gate module housing, inside which are provided a driving handle 31, a gear transmission device 32, a tripping driving structure, a motor 33, a circuit board 35, and a test button 43 (the circuit board 35 can be specifically referred to in FIG. Figure 12), the circuit board 35 is arranged inside the housing of the reclosing module, and the circuit board 35 is respectively connected to the L-pole incoming terminal 12 and the N-pole incoming terminal 22, and is used to control the power supply of the circuit board 35 or the temperature rise data feedback of the incoming terminal; 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 stacked. The driving handle 31 and the test button 43 are respectively arranged on both sides of the upper part of the reclosing module housing, and the driving handle 31 and the gear transmission device 32 are rotated together through a driving connecting rod 34, and the gear transmission device 32 is connected to the motor 33 for 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. When the controller of the circuit board 35 receives the closing action After the signal is received, the driving motor 33 rotates, and the gear transmission device 32 and the driving connecting rod 34 cooperate with each other to activate the L-pole operating mechanism 15 and the N-pole operating mechanism 25 to realize automatic closing; the tripping driving structure is arranged on the side of the gear transmission device 32 facing the circuit board 35, and the driving motor 33 rotates after the controller of the circuit board 35 receives the tripping action signal. With the cooperation of the gear transmission device 32 and the tripping driving structure, the L-pole operating mechanism 15 and the N-pole operating mechanism 25 are tripped to realize automatic opening; the test button 43 can be set on any side of the line to operate the on and off of the test button circuit in the leakage protection module. When the test button circuit is turned on, the zero-sequence mutual inductor 41 detects the leakage signal and the leakage release 42 triggers the opening of the circuit breaker.

[0049] 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, and the gear transmission device 32 is arranged in the middle of the reclosing gate module housing. 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 N-pole locking linkage shaft 251 of the N-pole operating mechanism 25. The tripping driving structure pushes the N-pole locking linkage shaft 251 of the N-pole operating mechanism 25 to move and realizes synchronous opening of the N-phase pole module 2 and the L-phase pole module 1 under the linkage action.

[0050] like Figure 11As shown, the gear transmission device 32 includes three first gears 321, second gears 322 and third gears 323 that are meshed in sequence, wherein the first gear 321 is meshed with the motor 33 through a worm, and a driving connecting rod 34 is provided on the third gear 323 on the side facing 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 cooperates with the third gear 323 as a driving end to drive the driving handle 31 to rotate. A tripping driving structure is provided on the side of the third gear 323 facing the circuit board 35. The trip drive structure includes a trip drive member 36 and a drive protrusion (not shown). One end of the trip drive member 36 is rotatably mounted on the reclosing gate module housing, and the other end of the trip drive member 36 is arranged corresponding to the N-pole lock linkage shaft 251 of the N-pole operating mechanism 25. The drive protrusion is arranged on the side of the third gear 323 facing the circuit board 35 and is in contact with the trip drive member 36 through rotation, thereby driving the trip drive member 36 to push the N-pole lock linkage shaft 251 of the N-pole operating mechanism 25 to unlock the lock and tripping in the N-pole operating mechanism 25, completing the tripping action. Such a trip drive structure has the advantages of being simple and reliable in structure and facilitating reset after tripping.

[0051] Combine Figure 9-11 An embodiment of the cooperation between a driving handle 31 and a gear transmission device 32 is provided. The driving handle 31 has a protruding handle portion 311. A track groove 371 for cooperating with the driving end of the driving connecting rod 34 is provided below the driving handle 31. As the third gear 323 opens and closes the switch, the driving connecting rod 34 slides along the track groove 371. The driving end pushes the handle portion 311 to rotate the driving handle 31. When the motor 33 drives the gear transmission device 32 to close the switch, Figure 11 The rotation direction of the third gear 323 is counterclockwise. At this time, the driving end of the driving connecting rod 34 slides from the inner end of the track groove 371 to the outer end of the track groove 371. After the driving end contacts the handle part 311, the handle part 311 is pushed to realize the closing rotation of the driving handle 31. The closing rotation direction of the driving handle 31 is clockwise. When the motor 33 drives the gear transmission device 32 to open the switch, Figure 11The third gear 323 rotates clockwise. At this time, the gear transmission device 32 causes the trip drive structure to drive the N-pole locking linkage shaft 251 of the N-pole operating mechanism 25. This linkage action causes the L-phase pole module 1 and the N-phase pole module 2 to synchronously complete the tripping action. Simultaneously, the gear transmission device 32 drives the driving end of the connecting rod 34 to slide from the outer end of the track groove 371 to the inner end of the track groove 371. After the driving end releases its pushing force, the handle portion 311 rotates counterclockwise to open the gate. It should be noted that the circuit board 35 is provided with an escape groove 352 for the driving protrusion of the third gear 323 to move. The housings of the reclosing gate module, the N-phase pole module, and the L-phase pole module are provided with through holes for the respective locking linkage shafts to achieve linkage and rotation.

[0052] The difference from the existing test button 43 installation position is that Figure 1 、 2 As shown in Figures 9-11, the test button 43 of the present application is provided on the reclosing gate module 3. The test button 43 is provided on the upper part of the reclosing gate module 3 and is located on the side opposite to the driving handle 31. The test button circuit of the leakage protection module is connected to the circuit board 35, wherein the micro switch 44 for controlling the on and off of the test button circuit is also provided on the circuit board 35. The end of the test button 43 extending into the interior of the reclosing module is used to press the micro switch 44 on the circuit board 35.

[0053] The test button 43 has two pressing portions, one of which, serving as a first pressing portion, slides through a mounting slot provided on the reclosing module housing. The other, serving as a second pressing portion, is used to press a microswitch 44 located within the reclosing module housing on the circuit board 35. A cooperating limiting structure is preferably provided between the test button 43 and the reclosing module housing. The limiting structure is used to limit the travel of the test button 43 beyond the reclosing module housing. This limiting structure prevents the test button 43 from being ejected excessively when pressed.

[0054] like Figure 2 、 10As shown in Figure 11, the limiting structure includes a first limiting boss 372 arranged inside the housing of the reclosing gate module and a second limiting boss 431 arranged on the test button 43. The first limiting boss 372 is opposite to the first pressing portion. Preferably, a return spring 373 is arranged between the first limiting boss 372 and the first pressing portion. The second limiting boss 431 protrudes and is arranged on one side of the test button 43 for limiting cooperation with the inner wall of the housing of the reclosing gate module. The structure for limiting cooperation with the second limiting boss 431 can be a protruding structure, a groove structure or other structure capable of achieving limiting cooperation arranged inside the housing of the reclosing gate module. In the present application, the limiting cooperation is achieved with the help of the shape of the housing of the reclosing gate module and the second limiting boss 431, and the upper side wall of the housing of the reclosing gate module protrudes outward. The arrangement makes the overall housing of the reclosing gate module present a "convex" shape, and the upper side wall of the reclosing gate module 3 is a stepped surface with a high middle and low sides. The reclosing gate module housing is composed of a base 37 and an upper cover 38. A first limiting boss 372 is provided on the base 37, and a reset spring 373 is provided between the first limiting boss 372 and the first pressing portion. The test button 43 is passed through the upper part of the base, and preferably a second limiting boss 431 is provided on one side of the second pressing portion. The second limiting boss 431 is engaged with the stepped surface of the upper cover 38 to limit the stroke of the test button 43 extending out of the housing of the reclosing gate module. This first limiting boss 372 and the structure for limiting cooperation with the second limiting boss 431 are respectively provided in the structure of the base 37 and the test button 43, which facilitates the installation of the test button 43. Of course, the second limiting boss 431 may also be provided at other positions of the test button 43 , and the second limiting boss 431 may also cooperate with other structures of the reclosing gate module housing to limit the movement stroke of the test button 43 .

[0055] The reclosing gate module 3 is provided with an indicator light, which is used to display the working status of the circuit breaker. The indicator light includes a test button 43 provided on the reclosing gate module 3 and a light emitting element 351 provided inside the reclosing gate module 3 (see Figure 10 ), the test button 43 is positioned near the light-emitting element 351. This button 43 acts as a light guide, directing the operating status of the light-emitting element 351 to the exterior of the reclosing gate module 3 for display of the circuit breaker's operating status. This structure, in which the test button 43 also serves as a light guide, prevents the indicator light from popping out when the test button 43 is pressed, compared to placing the indicator light within the test button 43. This structure also reduces the size of the circuit breaker and avoids requiring excessive mounting holes.

[0056] The light emitting element 351 in the indicator light is preferably a light emitting diode, and the test button 43 is a translucent part made of PC material. Of course, other translucent materials can also be used to make the test button 43. The light emitting diode is set at a position near the test button 43 on the circuit board 35. Figure 10 In the embodiment, the light emitting diode is arranged on the upper part of the circuit board 35, and the test button 43 transmits the lighting condition of the light emitting diode to the outside of the reclosing gate module 3 to indicate the state of the circuit breaker. Preferably, different colors or different brightness or flashing frequencies of the light emitting diode are used to display different states of the circuit breaker, that is, the indicator light can indicate that the circuit breaker is in normal working state, leakage state, overload state, short circuit or over / under voltage state, and can also display the state of arrears or normal fees. Of course, the number of light emitting elements 351 can be multiple, corresponding to different working states of the circuit breaker.

[0057] like Figure 1 、 9 As shown, the reclosing gate module 3 is also provided with a switching switch 39. The switching switch 39 is located between the driving handle 31 and the test button 43. The switching switch 39 is driven to set the circuit breaker module to manual mode or automatic mode. In manual mode, the product cannot close automatically and needs to be closed manually. The switching switch 39 includes a toggle switch 391 and a push plate 392. The toggle switch 391 is set on the circuit board 35. The push plate 392 is set on the surface of the toggle switch 391 and is used to push the toggle switch 391. Preferably, the push plate 392 is located between the toggle switch 391 and the housing of the reclosing gate module and can slide between the toggle switch 391 and the reclosing gate module. An opening corresponding to the push plate 392 is provided on the housing of the reclosing gate module for pushing the push plate 392. By pushing the push plate 392, the manual mode or the automatic mode is switched. The toggle switch 391 is connected to the power supply circuit of the motor 33, or to the control circuit of the automatic opening control circuit, or is connected to the controller in the reclosing gate module 3 as a parameter signal.

[0058] The above is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A leakage circuit breaker, comprising an L-phase pole module (1), an N-phase pole module (2), a reclosing gate module (3) and a leakage protection module, wherein the L-phase pole module (1) comprises an L-pole handle structure (14), the N-phase pole module (2) comprises an N-pole handle structure (24), the reclosing gate module (3) comprises a driving handle (31), and the driving handle (31) is linked with the L-pole handle structure (14) and the N-pole handle structure (24) via a handle linkage shaft to realize automatic closing, characterized in that: The N-phase pole module (2) is arranged between the L-phase pole module (1) and the reclosing gate pole module (3); the leakage protection module is dispersedly arranged in the N-phase pole module (2) and the reclosing gate pole module (3); the leakage protection module comprises a zero-sequence mutual inductor (41), a leakage tripper (42) and a test button circuit; the zero-sequence mutual inductor (41) and the leakage tripper (42) are arranged in the N-phase pole module (2); the test button circuit is arranged in the reclosing gate pole module (3); the leakage tripper (42) and the test button circuit are connected to the circuit board (35) of the reclosing gate pole module (3); The on / off of the test button circuit is controlled by a test button (43) provided on the reclosing gate module (3); an indicator light is provided on the circuit board (35) of the reclosing gate module (3); the indicator light comprises a test button (43) passing through the reclosing gate module (3) and a light emitting element (351) provided inside the reclosing gate module (3); the test button (43) is provided near the light emitting element (351); the test button (43) serves as a light guide column to guide the working state of the light emitting element (351) to the outside of the reclosing gate module (3) for displaying the working state of the circuit breaker.

2. A leakage circuit breaker according to claim 1, characterized in that: The light emitting element (351) is a light emitting diode, which is arranged on the circuit board (35) at a position close to the test button (43), and the test button (43) is a translucent part made of PC material.

3. The leakage circuit breaker according to claim 1, characterized in that: After the zero-sequence mutual inductor (41) detects the leakage current, the controller on the circuit board (35) of the reclosing gate module (3) drives the leakage release (42) to operate and open the circuit breaker; Alternatively, when the test button circuit is turned on, the zero-sequence mutual inductor (41) detects the simulated leakage current generated by the test button circuit, and the controller of the circuit board (35) of the reclosing gate module (3) drives the leakage release (42) to operate and open the circuit breaker; The L-phase pole module (1) comprises a pair of L-pole incoming terminals (12) and L-pole outgoing terminals (13) arranged on both sides of the L-phase pole module (1); an L-pole handle structure (14) and an L-pole operating mechanism (15) are arranged between the L-pole incoming terminals (12) and the L-pole outgoing terminals (13); an L-pole moving contact of an L-pole contact mechanism (16) is connected to the L-pole operating mechanism (15); and a L-pole moving contact is arranged between the L-pole moving contact and the L-pole incoming terminal (12). A current transformer (19) is provided, and a connecting wire (1a) connected between the L-pole moving contact and the L-pole incoming terminal (12) passes through the current transformer (19). The current transformer (19) is connected to a circuit board (35) of the reclosing gate module (3) and is used to feed back a current signal of the main line to a controller of the circuit board (35). After the controller of the circuit board (35) determines that an overload has occurred, it drives the reclosing gate module (3) to operate and realize automatic opening of the circuit breaker.

4. A leakage circuit breaker according to any one of claims 1 to 3, characterized in that: The conduction and disconnection of the test button circuit are controlled by a micro switch (44), and the micro switch (44) is arranged on the circuit board (35) of the reclosing gate module (3). The test button (43) is arranged on the reclosing gate module (3) and is used to cooperate with the micro switch (44) to make the test button circuit conduction or disconnection.

5. The leakage circuit breaker according to claim 4, characterized in that: The reclosing gate module (3) includes a reclosing gate module housing, the test button (43) is arranged on the upper part of the reclosing gate module housing, and the test button (43) has two pressing parts, one of which is a first pressing part and is slidably arranged through a mounting groove provided on the reclosing gate module housing, and the other pressing part is a second pressing part and is used to press the micro switch (44) of the circuit board (35) located inside the reclosing gate module housing.

6. The leakage circuit breaker according to claim 5, characterized in that: A mutually cooperating limiting structure is provided between the test button (43) and the housing of the reclosing gate module. The limiting structure is used to limit the stroke of the test button (43) extending out of the housing of the reclosing gate module. The limiting structure includes a first limiting boss (372) provided inside the housing of the reclosing gate module and a second limiting boss (431) provided on the test button (43). The first limiting boss (372) is opposite to the first pressing portion, and the second limiting boss (431) is protruding from one side of the test button (43) and is used to cooperate with the inner wall of the housing of the reclosing gate module.

7. The leakage circuit breaker according to claim 6, characterized in that: A return spring (373) is provided between the first limiting boss (372) and the first pressing portion.

8. The leakage circuit breaker according to claim 1, characterized in that: The reclosing gate module (3) comprises a reclosing gate module housing, wherein a driving handle (31), a gear transmission device (32), a tripping driving structure, a motor (33), a circuit board (35) and a test button (43) are provided inside the reclosing gate module housing, wherein the circuit board (35) is provided inside the reclosing gate module housing, the driving handle (31), the gear transmission device (32) and the motor (33) are provided on the surface of the circuit board (35), the driving handle (31) and the test button (43) are respectively provided on both sides of the upper part of the reclosing gate module housing, and the motor (33) is provided on the upper part of the circuit board (35). (33) is arranged at the lower part of the reclosing gate module (3), the gear transmission device (32) is arranged in the middle of the reclosing gate module housing, 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 the driving connecting rod (34); the tripping drive structure is arranged on the side of the gear transmission device (32) facing the circuit board, and the tripping drive structure includes a driving boss arranged on the gear transmission device (32) and a tripping drive member (36) rotatably mounted on the reclosing gate module housing.

9. The leakage circuit breaker according to claim 8, characterized in that: The reclosing gate module (3) is further provided with a switching switch (39), the switching switch (39) being located between the driving handle (31) and the test button (43), and the switching switch (39) being driven to set the circuit breaker module to a manual mode or an automatic mode, the switching switch (39) comprising a toggle switch (391) and a push plate (392), the toggle switch (391) being provided on a circuit board (35), the push plate (392) being provided on the surface of the toggle switch (391) for pushing the toggle switch (391), and an opening corresponding to the push plate (392) being provided on the reclosing gate module (3) for pushing the push plate (392).

10. The leakage circuit breaker according to claim 3, characterized in that: The N-phase pole module (2) comprises an N-phase pole module housing, wherein an N-pole handle structure (24), an N-pole operating mechanism (25), an N-pole contact mechanism (26) and a pair of N-pole wiring terminals are arranged inside the N-phase pole module housing; the pair of N-pole wiring terminals are respectively arranged on both sides of the N-phase pole module housing as an N-pole incoming terminal (22) and an N-pole outgoing terminal (23), the N-pole handle structure (24) and the N-pole operating mechanism (25) are arranged on the upper part of the N-phase pole module housing, and the N-pole contact mechanism (26) is arranged on the upper part of the N-pole module housing. The N-pole moving contact in the mechanism (26) is connected to the N-pole operating mechanism (25), the N-pole moving contact is located in the middle of the N-phase pole module housing, the N-pole static contact of the N-pole contact mechanism (26) is fixedly installed in the middle of the N-phase pole module housing and is arranged opposite to the N-pole moving contact; a zero-sequence mutual inductor (41) and a leakage release (42) are provided between the N-pole outlet terminal (23) and the N-pole static contact, and the leakage release (42) is arranged between the zero-sequence mutual inductor (41) and the N-pole handle structure (24).

11. The leakage circuit breaker according to claim 3, characterized in that: The light emitting element (351) is a light emitting diode, used to indicate whether the circuit breaker is in a normal working state, a leakage state, an overload state, a short circuit or an over / under voltage state.

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