CN117253753B

CN117253753B - Leakage protection module

Info

Publication number: CN117253753B
Application number: CN202210654774.0A
Authority: CN
Inventors: 朱俊; 邵江华; 陈杨杰
Original assignee: Zhejiang Chint Electrics Co Ltd
Current assignee: Zhejiang Chint Electrics Co Ltd
Priority date: 2022-06-10
Filing date: 2022-06-10
Publication date: 2026-01-02
Anticipated expiration: 2042-06-10
Also published as: CN117253753A

Abstract

The utility model provides a leakage protection module, includes the second casing be equipped with leakage detection circuit and by the electric leakage tripping device of electric leakage detection circuit driven in the second casing, leakage detection circuit includes two binding post and zero sequence transformer, leakage detection circuit still includes at least one lug, and one end and the binding post of at least one lug are connected, and the other end passes zero sequence transformer's through wires hole and forms the inserted sheet that connects, connects the inserted sheet and the second wiring mouth of second casing lateral wall to set up relatively. The invention adopts the modularized leakage protection module, the lug connected on the wiring terminal forms the plug-in piece, so that the leakage protection module can be connected with the circuit breaker pole in a plug-in mode and power is taken from the main loop of the circuit breaker pole, the leakage protection module and the circuit breaker pole are connected by the lead instead of the prior art, the automatic assembly of the leakage protection module and the circuit breaker pole is facilitated, and the modularized development of the circuit breaker is met.

Description

Leakage protection module

Technical Field

The invention relates to the field of piezoelectric devices, in particular to a leakage protection module.

Background

The low-voltage circuit breaker can be used for distributing electric energy, protecting overload and short circuit of a circuit and power supply equipment, and can also be used for infrequent switching of the circuit and infrequent starting of a motor. With the continuous development of the Internet of things technology and the artificial intelligence technology, the small-size and modularized low-voltage circuit breakers are a trend.

The existing low-voltage circuit breaker generally has a leakage protection function, but the circuit breaker with the leakage protection function generally adopts an integrated structure, namely, the circuit breaker pole and the leakage protection module are integrated in the same installation cavity of the shell, the structure cannot meet the modularized development trend of the existing circuit breaker, and the wiring process of the leakage protection module and the circuit breaker pole is complex, so that the automatic production is not facilitated.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide the leakage protection module which is convenient to wire and meets the modularization development.

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

The utility model provides a leakage protection module, includes the second casing be equipped with leakage detection circuit and by the electric leakage tripping device of electric leakage detection circuit driven in the second casing, leakage detection circuit includes two binding post and zero sequence transformer, leakage detection circuit still includes at least one lug, and one end and the binding post of at least one lug are connected, and the other end passes zero sequence transformer's through wires hole and forms the inserted sheet that connects, connects the inserted sheet and the second wiring mouth of second casing lateral wall to set up relatively.

Further, the second wiring port is located at a position on the side wall of the second shell, which is opposite to the threading hole of the zero sequence transformer.

Further, the electric leakage detection circuit comprises two wiring lugs, one ends of the two wiring lugs are connected with the two wiring terminals respectively, and the other ends of the two wiring lugs all penetrate through the threading holes of the zero sequence transformer to form two side-by-side connecting inserting pieces.

Further, the zero sequence transformer is provided with an electric isolation plate in the threading hole, the electric isolation plate divides the threading hole into a first threading hole and a second threading hole, and the two wiring lugs respectively penetrate through the first threading hole and the second threading hole.

Further, the two wiring terminals are an L-pole outgoing terminal and an N-pole outgoing terminal respectively,

The wiring lug connected with the L pole wire outlet terminal is a first wiring lug which is positioned at one side of the zero sequence transformer and does not pass through the threading hole of the zero sequence transformer or passes through the threading hole of the zero sequence transformer,

The wiring lug connected to the N pole wire outlet terminal is a second wiring lug, and the second wiring lug penetrates through the threading hole of the zero sequence transformer.

Further, the first wiring lug penetrates through the threading hole of the zero sequence transformer, the first wiring lug comprises a first conductive plate, a second conductive plate and an extension plate,

One end of the first conductive plate is used as a first end of the first wiring lug to be connected with the L-pole wire outlet terminal, the other end of the first conductive plate is bent towards one side deviating from the L-pole wire outlet terminal,

One end of the extension plate is connected with the side of the other end of the first conductive plate, the other end of the extension plate is bent in a direction away from the first conductive plate,

The second conducting plate is used as the second end of the first lug, one end of the second conducting plate is connected to the side, far away from the first conducting plate, of the extension plate, and the other end of the second conducting plate penetrates through the threading hole of the zero sequence transformer.

Further, a first abutting groove is arranged at the side of the extension plate, a leakage test loop is also arranged in the second shell,

The electric leakage testing circuit comprises a testing button, a first elastic piece and a second elastic piece, and the first elastic piece and the second elastic piece are matched to form a breakpoint of the electric leakage testing circuit;

the leakage detection circuit comprises a circuit board connected with the zero sequence transformer;

One end of the second elastic piece is elastically abutted with the first abutting groove, and the other end of the second elastic piece is connected with the circuit board.

Further, the first wiring lug does not pass through the threading hole of the zero sequence transformer, the first wiring lug comprises a first conductive plate and a second conductive plate,

One end of the first conductive plate is used as a first end of the first wiring lug to be connected with the L-pole wire outlet terminal, the other end of the first conductive plate is bent towards one side far away from the L-pole wire outlet terminal,

The second conducting plate serves as the second end of the first wiring lug, one end of the second conducting plate is connected with the other end side of the first conducting plate, and the second conducting plate extends along the direction away from the first conducting plate and is close to the threading hole of the zero sequence transformer.

Further, a first abutting groove is formed in the side of the other end of the second conductive plate, and the first abutting groove corresponds to the threading hole of the zero sequence transformer.

Further, the second wiring piece is integrally in a plate-shaped structure, the second wiring piece is electrically connected with the N-pole outgoing terminal, and the second end of the second wiring piece penetrates through the threading hole of the zero sequence transformer to form an inserting piece.

Further, a second abutting groove is arranged at the side of the first end edge of the second lug,

The electric leakage detection circuit comprises a third elastic piece and a circuit board connected with the zero sequence transformer;

One end of the third elastic piece is elastically abutted with the second abutting groove, and the other end of the third elastic piece is connected with the circuit board.

The leakage protection module adopts the modularized leakage protection module, the wiring lugs connected to the wiring terminals form the plug-in pieces, so that the leakage protection module can be connected with the circuit breaker electrode in a plug-in mode and power is taken from the main circuit of the circuit breaker electrode, the leakage protection module and the circuit breaker electrode are connected through wires instead of the prior art, the automatic assembly of the leakage protection module and the circuit breaker electrode is facilitated, and the modularized development of the circuit breaker is met.

In addition, the wiring lug corresponds to the threading hole of the zero sequence transformer, so that the length of the wiring lug is shortened, wiring is facilitated, and the size is reduced.

In addition, the threading hole of the zero sequence transformer is provided with an electric isolation plate, so that electric isolation is facilitated for the first wiring lug and the second wiring lug.

In addition, the first lug can pass through or not pass through the threading hole of the zero sequence transformer, so that different use requirements can be met.

Drawings

FIG. 1 is a top view of a circuit breaker pole in the present invention;

FIG. 2 is a schematic view of the structure of the first housing in the present invention;

FIG. 3 is a schematic view of a leakage protection module according to the present invention;

FIG. 4 is a schematic view of the structure of the second housing of the present invention;

FIG. 5 is a schematic diagram showing an internal structure of the leakage protection module according to the present invention;

Fig. 6 is a schematic structural diagram (first structure) of the zero sequence transformer, the first lug and the second lug in the invention;

fig. 7 is a schematic view of the internal structure of the earth leakage protection module of the present invention (the first terminal of the coil serves as the lead-out conductor);

Fig. 8 is a schematic structural diagram of the zero sequence transformer, the first connecting piece and the second connecting piece (second structure) in the invention;

fig. 9 is a schematic view of the structure of the coil in the present invention (the first terminal of the coil serves as the lead-out conductor).

Detailed Description

Specific embodiments of the leakage protection module of the present invention are further described below with reference to the examples shown in fig. 1-9. The earth leakage protection module of the present invention is not limited to the description of the following embodiments.

The utility model provides a leakage protection module, includes second casing 12 the second casing 12 is equipped with electric leakage detection circuit and by electric leakage tripping device of electric leakage detection circuit drive, electric leakage detection circuit includes two binding post and zero sequence transformer 34, electric leakage detection circuit still includes at least one lug, and one end and binding post of at least one lug are connected, and the other end passes zero sequence transformer 34's through wires hole and forms and connect inserted sheet 44, connects inserted sheet 44 and the second wiring mouth 121 relative setting of second casing 12 lateral wall.

According to the leakage protection module 3, the modularized leakage protection module 3 is adopted, the connecting lugs connected to the connecting terminals form the plug-in pieces 44, so that the leakage protection module 3 can be connected with the circuit breaker electrode 2 in a plug-in mode and power is taken from the main circuit of the circuit breaker electrode 2, the leakage protection module 3 and the circuit breaker electrode 2 are connected through wires instead of the prior art, automatic assembly of the leakage protection module 3 and the circuit breaker electrode 2 is facilitated, and the modularized development of a circuit breaker is met.

As shown in fig. 1 to 9, the circuit breaker includes a housing in which at least one circuit breaker pole 2 is provided, the housing includes at least one installation cavity for assembling the circuit breaker pole 2, when a plurality of installation cavities are provided in the housing, the housing may include a plurality of partitions fixedly provided inside the housing, the installation cavity is formed by a space between two adjacent partitions, or the housing includes an upper cover, a base and partitions assembled between the upper cover and the base, wherein the upper cover and one partition are covered to form one installation cavity, the base and the other partition form another installation cavity, and the other partitions are respectively two-to-two formed into a plurality of independent installation cavities, which may be used as the first housings 11, and the adjacent two first housings 11 may be assembled together, so that the housing of the circuit breaker includes a plurality of assembled first housings 11.

A phase main line is arranged in each breaker pole 2, that is, an N-phase main line or a phase L-phase main line is arranged in each breaker pole 2, for example, four breaker poles are arranged in the breaker, wherein three breaker poles are all L poles and are respectively provided with a phase L-phase main line and an operating mechanism, one breaker pole is provided with an N-phase main line and an operating mechanism, or two breaker poles are arranged in the breaker, and the two breaker poles are all L poles, or are respectively L poles and N poles. Of course, two-phase main lines may be provided simultaneously in the same breaker pole 2, for example, an L-phase main line and an N-phase main line may be provided simultaneously in one breaker pole, or two-phase L-phase main lines may be provided simultaneously in one breaker pole, and only one operation mechanism may be provided in the same breaker pole.

In this embodiment, two breaker poles 2 are taken as an example, only one phase main circuit is set in each breaker pole 2, that is, one breaker pole 2 is taken as an L pole to be provided with an L phase main circuit, the other breaker pole 2 is taken as an N pole to be provided with an N phase main circuit, the L phase main circuit and the N phase main circuit jointly form a main circuit of the breaker, and the L pole and the N pole are jointly assembled in the same mounting cavity, that is, the L pole and the N pole are jointly arranged in the same first housing 11.

Each breaker pole 2 comprises a pair of wiring terminals connected to a phase main circuit, a handle mechanism, an operating mechanism and a contact mechanism, wherein the handle mechanism, the operating mechanism and the contact mechanism are sequentially connected in a linkage mode, the pair of wiring terminals comprise an incoming line terminal and an outgoing line terminal, the contact mechanism is connected between the pair of wiring terminals and used for controlling the on-off of the phase main circuit, the contact mechanism comprises a moving contact and a fixed contact which are matched with each other, the moving contact is connected with the operating mechanism in a linkage mode, the fixed contact is fixedly assembled on one side opposite to the moving contact, the operating mechanism is driven through the manual operation handle mechanism, and the moving contact and the fixed contact are enabled to be contacted or separated so as to realize the on-off control of the main circuit in the breaker pole 2. In addition, each breaker pole 2 can be further provided with an arc extinguishing system and a short-circuit protection mechanism and/or an overload protection mechanism matched with the operation mechanism, wherein the arc extinguishing system is matched with one side of the contact mechanism and used for extinguishing an arc generated in the switching-on and switching-off process of the moving contact and the fixed contact, and the operation mechanism is triggered to trip when a main loop is in short circuit or overload fault.

As shown in fig. 1-2, the terminal of the breaker pole 2 is disposed at least one end of the housing, the incoming terminals (outgoing terminals) of two adjacent breaker poles 2 are disposed at the same end of the housing, the handle mechanism is rotatably assembled at the upper portion of the housing (the first housing 11), the operating mechanism is disposed at one side of the handle mechanism, the handle mechanism and the operating mechanism are connected in linkage through a connecting rod, the moving contact is connected at the lower portion of the operating mechanism, the operating mechanism and the handle mechanism of two adjacent breaker poles 2 are respectively connected in linkage, the arc extinguishing chamber and the fixed contact of the arc extinguishing system are fixed at the middle portion of the housing (the first housing 11), wherein the fixed contact is opposite to the moving contact.

The operating mechanism of each breaker pole 2 comprises a lever rotationally assembled in a shell, the lever can be rotationally connected with one side wall of the shell or a partition plate in the shell or the side wall of a first shell 11, a jump button and a lock catch are rotationally assembled on the lever, a moving contact is rotationally installed through contact support and is linked with the lever, the jump button is in snap fit with one end of the lock catch, the other end of the jump button is linked with a connecting rod, the lock catch is provided with a linkage part which is integrally in a rod-shaped structure, an avoidance hole is formed in one side wall of the shell or the partition plate in the shell or the side wall of the first shell 11 corresponding to the linkage part, one end of the linkage part can penetrate through the avoidance hole, an energy storage spring is assembled between the lever and the contact support, and two elastic arms of the energy storage spring are respectively in butt joint with the contact support and the lever, and preferably the energy storage spring is a torsion spring coaxially rotationally assembled with the contact support.

The L pole is provided with a short-circuit protection mechanism and an overload protection mechanism, wherein the short-circuit protection mechanism is arranged between the handle mechanism and the arc extinguish chamber of the arc extinguish system, one end of the short-circuit protection mechanism is opposite to the operating mechanism of the L pole, the overload protection mechanism and the short-circuit protection mechanism are respectively arranged at two sides of the operating mechanism of the L pole, one end of the overload protection mechanism is matched with the operating mechanism, and the short-circuit protection mechanism, the arc extinguish system and the overload protection mechanism are not required to be arranged in the N pole. Of course, the short-circuit protection mechanism, the arc extinguishing system and the overload protection mechanism 26 may be disposed in the N pole, i.e. a structure similar to the L pole is adopted as the N pole. In addition, the operating mechanism 22 of the adjacent breaker pole 2 may share part of the components such as a lever, contact support, trip, etc., and the handle mechanism 21 and the latch are interlocked.

The accessory module is further arranged on one side of one circuit breaker electrode 2, namely, the accessory module is arranged on one side of the first shell, the accessory module in the embodiment takes the leakage protection module 3 as an example, as shown in fig. 3-9, preferably, the leakage protection module 3 comprises a second shell 12, the second shell 12 is spliced with one first shell 11 to form a circuit breaker with a leakage protection function, the shell comprises a second shell 12 and at least one first shell 11 at this time, a leakage detection circuit and a leakage tripping mechanism are assembled in the second shell 12, the leakage tripping mechanism comprises a tripping device 37 driven by the leakage detection circuit, the leakage detection circuit comprises a circuit board 35 and a zero sequence transformer 34 connected with the circuit board 35, the circuit board 35 is provided with a controller for driving the leakage tripping device, the zero sequence transformer 34 is connected with an L-phase main circuit and an N-phase main circuit, after the ejector rod is spliced with the first shell 11 to form a circuit breaker with the leakage protection function, a push rod 39 and an indicator 38 are correspondingly arranged on one side of the ejector rod of the tripping device 37, the push rod 37 is correspondingly provided with a push plate 39 and an indicator piece 39, the push plate 39 is correspondingly arranged on one side of the ejector rod 37, the ejector rod is correspondingly provided with a push plate 39 and an indicator piece 39, and the push plate 39 is correspondingly arranged on the second shell 12 to be matched with the side wall of the circuit breaker to the push plate, and the current breaker is rotatably provided with the leakage indicator piece 39, and the current indicator device is rotatably matched with the current indicator device, and the current device is rotated, and the current indicator device is rotated, when the push plate 39 is matched with the push plate and the push plate has a current indicator device is rotated, and the indicator device is correspondingly a current device.

The leakage protection module 3 is further provided with a leakage testing mechanism, the leakage testing mechanism comprises a leakage testing loop for taking electricity from the main loop, the leakage testing loop comprises a test button 36, a first elastic piece 31 and a second elastic piece 32, the test button 36 is slidably assembled on the second shell 12, the first elastic piece 31 and the second elastic piece 32 are matched to form a breakpoint of the leakage testing loop, the test button 36 is pressed to enable the first elastic piece 31 to be elastically deformed to be connected with the breakpoint of the leakage testing loop, preferably, a leakage testing loop winding of the zero sequence transformer 34 is further connected in series in the leakage testing loop, and a leakage current detection winding of the zero sequence transformer 34 is connected with the circuit board 35.

The application has an improvement that the accessory module and the breaker pole 2 are respectively in a modularized structure, the accessory module and the breaker pole 2 are assembled together by adopting two module structures, namely, the leakage protection module 3 in the embodiment adopts a modularized structure, the second shell 12 of the leakage protection module 3 is assembled with the first shell 11 of the breaker pole 2, the first shell 11 and the second shell 12 are assembled to form a shell of the breaker, meanwhile, the leakage protection module 3 is assembled on one side of the breaker pole 2 to realize the power taking from the main circuit of the breaker pole 2, and preferably, the leakage protection module 3 is connected into the main circuit of the breaker by adopting a plug connection mode, namely, the leakage protection module 3 is connected into an L-phase main circuit and an N-phase main circuit of the breaker pole 2 by adopting a plug connection mode. It should be noted that, in other embodiments, the power taking of the L-phase main line and the N-phase main line of the leakage protection module 3 and the breaker pole 2 may be contact power taking, but the contact power taking mode is not as stable as the plug connection.

Specifically, a wiring port is formed on the side wall of the first housing 11 adjacent to the second housing 12, at least one lead-out conductive piece 45 is connected to the L-phase main circuit or the N-phase main circuit of the breaker pole, a wiring lug is connected to the wiring terminal of the leakage protection module 3, the lead-out conductive piece 45 and/or the wiring lug form a plug connection structure for connecting to the main circuit through the wiring port, and the lead-out conductive piece 45 and/or the wiring lug of the plug connection structure pass through the threading hole of the zero sequence transformer 34. Preferably, at least one of the lead-out conductive members 45 is provided with a plug-in portion 451, the plug-in portion 451 corresponds to the first wiring opening 111 on the side wall of the first housing 11, one end of the plug-in portion forms a plug-in piece 44, the plug-in piece 44 passes through the threading hole of the zero sequence transformer 34, the plug-in piece 44 corresponds to the second wiring opening 121 on the side wall of the second housing 12, the plug-in piece 44 is preferably in a sheet-shaped structure, the plug-in portion 451 is a slot extending into the first wiring opening 111, and the plug-in piece 44 extends out of the second housing 12 to be plugged into the plug-in portion 451. Of course, as other embodiments, the plug portion 451 may extend from the first housing 11 and extend into the second housing 12 for insertion engagement. As another embodiment, the connector tab may be provided with a connector 451, and the connector 44 is formed at one end of the lead-out conductive member, and the connector 44 is inserted into the connector 451 for mating. The plug connection structure formed by the cooperation of the wiring lug and the lead-out conducting piece enables the main loop to pass through the threading hole of the zero sequence transformer 34 while realizing the connection and electricity taking of the leakage protection module 3 and the circuit breaker pole 2, omits wires, is beneficial to reducing the volume of the circuit breaker, enables the leakage protection module 3 and the circuit breaker pole 2 to be two independent modules, and meets the modularized development of the circuit breaker.

Preferably, the main circuit of the circuit breaker is connected with leading-out conductive pieces, namely, the N-phase main circuit and one of the L-phase main circuits of the circuit breaker pole 2 are respectively connected with leading-out conductive pieces, the side walls of the first shell 11 and the second shell 12, which are close to each other, are respectively provided with corresponding wiring ports for leading-out conductive pieces, namely, the wiring ports are arranged on the side wall of the shell in the thickness direction of the circuit breaker pole 2, wherein the wiring ports are opposite to the wiring ports of the zero sequence transformer 34, specifically, the wiring ports comprise a first wiring port 111 respectively arranged in the middle part of the side wall of the first shell 11 and a second wiring port 121 arranged in the middle part of the side wall of the second shell 12, wherein the number of the first wiring ports 111 can be corresponding to the number of leading-out conductive pieces, the number of the second wiring ports 121 is one-to-one, or only one first wiring port 111 and one second wiring port 121 are arranged on one side of the first shell 11 and the second shell 12, the two lead-out conductive pieces are corresponding to the same first wiring port 111, the two wiring lugs are corresponding to the same second wiring port of the second shell 12, in addition, the two lead-out conductive pieces can extend into the second shell 12 to be respectively spliced with the two wiring lugs, or the two wiring lugs extend out of the second shell 12 to be respectively spliced with the two lead-out conductive pieces, or one lead-out conductive piece extends into the second shell 12 to be spliced with one wiring lug, the other wiring lug extends out of the second shell 12 to be spliced with the other lead-out conductive piece, the wiring ports can be in one-to-one correspondence with the numbers of the lead-out conductive pieces and the wiring lugs, only one wiring port can be arranged on one side of the first shell 11 and one side of the second shell 12, so that the two lead-out conductive pieces extend out from the same wiring port of the first shell 11, the leakage protection module 3 comprises two wiring terminals, each wiring terminal is connected with a wiring lug which extends out of the leakage protection module 3, and the wiring lugs are connected with the leading-out conductive piece in a plugging manner, so that when the leakage protection module 3 is plugged into the circuit breaker electrode 2, the two wiring lugs can be plugged into the L-phase main circuit and the N-phase main circuit respectively to take electricity. Of course, other accessory modules of the circuit breaker can also be connected with the main circuit of the circuit breaker pole 2 in a wiring manner to take out electricity.

Preferably, each breaker pole 2 comprises a wire inlet terminal and a wire outlet terminal which are respectively arranged at two ends of the first shell 11, a phase main circuit is connected between the wire inlet terminal and the wire outlet terminal, two wire connecting terminals of the leakage protection module 3 are an L-pole wire outlet terminal 41-1b and an N-pole wire outlet terminal 41-2b respectively, and in such a structure, the electricity taking of the leakage protection module 3 from a main circuit of the breaker pole 2 is not influenced, the normal wire connection of the breaker pole 2 can not be influenced when the leakage protection module 3 is not spliced, the wire outlet terminal of the breaker pole 2 can not be used after the leakage protection module 3 is spliced, and the wire outlet terminal can be shielded by a shielding plate.

Of course, only the incoming line terminal or the outgoing line terminal may be disposed in the breaker pole 2, in this embodiment, the incoming line terminal is disposed in the breaker pole 2, and the outgoing line terminal is correspondingly disposed in the leakage protection module 3, that is, the L-pole incoming line terminal 41-1a and the N-pole incoming line terminal 41-1b are disposed in parallel at one end of the first housing 11, the leakage protection module 3 includes two connection terminals disposed at the same end of the second housing 12, the two connection terminals are respectively the L-pole outgoing line terminal 41-1b and the N-pole outgoing line terminal 41-2b, the L-phase main line of the L-pole is connected between the L-pole incoming line terminal 41-1a and the L-pole outgoing line terminal 41-1b, and the N-phase main line of the N-pole is connected between the N-pole incoming line terminal 41-2a and the N-pole outgoing line terminal 41-2b, so that after the leakage protection module 3 is spliced with the breaker pole 2, the breaker can be normally connected, and the internal space of the breaker can be saved.

Further, the lead-out conductive member is provided with an elastic plug-in portion 451, a connection terminal is provided at least one end of the first housing 11, two first connection ports 111 are provided at a side wall of one side of the first housing 11, each plug-in portion 451 is correspondingly provided with a slot and corresponds to one first connection port 111, at this time, each plug-in portion 451 is provided with a slot, each plug-in portion 451 is matched with the first connection port 111, two second connection ports 121 are provided at a side wall of the second housing 12, two connection lugs respectively correspond to the second connection ports 121 to form a plug-in piece 44 and correspondingly connect with one connection port 451 in a plug-in connection manner, preferably, the slots can sequentially pass through the first connection ports 111 and the second connection ports 121 to plug-in connection with the connection lugs, and of course, the connection lugs sequentially pass through the second connection ports 121 and the first connection ports 111 to plug-in connection ports can also plug in connection with the slots.

Further, the connection piece and/or the lead-out conductive piece correspondingly pass through the threading hole of the zero sequence transformer 34, preferably, the first connection port 111 and the second connection port 121 correspond to the threading hole of the zero sequence transformer 34, at this time, the first connection port 111 and the second connection port 121 are respectively located at the middle parts of the side walls of the first shell 11 and the second shell 12, so that the lengths of the connection piece and the lead-out conductive piece can be shortened, the occupied space of the connection piece and the lead-out conductive piece can be reduced, the lead-out conductive piece is preferably nearby and connected to parts arranged at the middle parts of the L pole and the N pole, such as a static contact and a short circuit protection mechanism of the contact mechanism, in this embodiment, the short circuit protection mechanism is located at the middle part of the first shell 11, the zero sequence transformer 34 is located at the middle part of the second shell 12, preferably, the lead-out conductive piece of the L pole is preferably connected to the short circuit protection mechanism, the lead-out conductive piece of the N pole is connected to the contact mechanism of the N pole, that is located at the position of the side wall of the shell corresponding to the short circuit protection mechanism, or the position corresponding to the static contact, the second connection port 121 is located at the side wall of the second shell 12 and the position corresponding to the zero sequence transformer 34, and the corresponding to the position of the zero sequence transformer 34 is also corresponding to the zero sequence transformer 34, so that the length of the connection piece and the zero sequence transformer can be matched with the zero sequence transformer is easy to be shortened.

Correspondingly, the leakage test circuit of the leakage protection module 3 takes electricity from the main circuit, preferably, the second elastic piece 32 is used as one electricity taking end of the leakage test circuit to be electrically connected with the L-electrode wire outlet terminal 41-1b, so that the leakage test circuit can take electricity from the L-phase main circuit, the other electricity taking end of the leakage test circuit is directly or indirectly electrically connected with the N-electrode wire outlet terminal 41-2b, the first end of the first elastic piece 31 is connected with the zero sequence transformer 34, and the second end of the first elastic piece 31 is matched with the second end of the first elastic piece 31 to form a breakpoint, and therefore, the second elastic piece 32 can form a breakpoint of the leakage test circuit and can also be used for taking electricity for the leakage test circuit, and the use quantity of wires is reduced. In addition, the circuit board 35 in the leakage detection circuit is also powered through the second elastic member 32, the third elastic member 33 is further connected to the circuit board 35, and the second end of the third elastic member 33 is used as a power taking end of the circuit board 35 to be connected with the second lug 43, so that the circuit board 35 can reduce the number of power taking wires while achieving power taking from the main circuit, the space utilization rate is improved, and the volume is reduced.

Furthermore, the wiring terminal of the zero sequence transformer 34 in the leakage protection module 3 adopts a contact pin, so that the wiring of the zero sequence transformer 34 can be realized through plug connection, and compared with the existing mode of taking electricity by adopting a wire, the zero sequence transformer has the advantages of convenience in wiring and less number of wires.

A first embodiment is provided in connection with fig. 3-6, in which the circuit breaker pole 2 is in plug-in engagement with the earth leakage protection module 3, with two lugs being located in the second housing 12. As shown in fig. 1 to 3, in the L pole, an L pole incoming line terminal 41-1a is provided at one end of the L pole, that is, an L pole incoming line terminal 41-1a is provided at one end of the first housing 11, the L pole contact mechanism includes an L pole moving contact and an L pole stationary contact 231, the L pole moving contact is electrically connected with the L pole incoming line terminal 41-1a, the L pole stationary contact 231 is fixed at one side of the arc extinguishing chamber, the short circuit protection mechanism is provided between the arc extinguishing chamber and the handle mechanism, the short circuit protection mechanism includes a coil assembly including a coil bobbin and a coil 25 wound outside the coil bobbin, a second terminal of the coil 25 is connected with the L pole stationary contact 231, a first terminal 251 of the coil 25 is connected with a connection board, the connection board is provided as an outgoing conductive member of the L pole extending outwardly in a direction perpendicular to a plane of the arc extinguishing chamber, the connection board is provided along a thickness direction of the breaker pole 2, the connection board is provided along a gap between the short circuit protection mechanism and the arc extinguishing chamber, and one end of the connection board remote from the first terminal 251 is provided with a plug 451.

The N pole and the L pole are arranged in the same first shell 11 in parallel, an N pole incoming line terminal 41-2a is arranged at one end of the N pole, namely, the L pole incoming line terminal 41-1a and the N pole incoming line terminal 41-2a are arranged at one end of the first shell 11 in parallel, the N pole contact mechanism comprises an N pole moving contact and an N pole static contact, wherein the N pole static contact and the L pole static contact 231 are arranged in parallel, the static contact plate of the N pole static contact is arranged along the horizontal direction, namely, the static contact plate of the N pole static contact corresponds to a gap between the coil component of the L pole and the arc extinguishing chamber, an outgoing conductive piece is formed by extending outwards from the middle side of the static contact plate of the N pole static contact, the outgoing conductive pieces of the N pole and the L pole extend towards one side of the first shell 11 side, namely, the outgoing conductive piece of the N pole extends towards one side of the second shell 12 along the plane perpendicular to the arc extinguishing chamber, namely, the outgoing conductive piece of the N pole extends along the thickness direction of the breaker pole 2, each lead-out conductive piece corresponds to one first wiring port 111 respectively, the plug-in portion 451 of each lead-out conductive piece is matched with the first wiring port 111, the plug-in portion 451 is provided with a slot extending out of the first wiring port 111, of course, the slot is positioned in the first shell 11 or positioned in the first wiring port 111, the shell side wall of the first wiring port 111 is also preferably arranged, that is, one side wall of the first shell 11 comprises a first cover body 13 and a second cover body 14 which are spliced with each other, one first wiring port 111 is positioned at the splicing position of the first cover body 13 and the second cover body 14, the splicing structure is beneficial to ensuring the electric gap and insulation between the two first wiring ports 111, further, the lower side edge of each first wiring port 111 is convexly provided with an insulation portion 112, the insulation portion 112 plays an insulation role, the adjacent leading-out conductive pieces are prevented from being short-circuited, and can be matched with the second wiring port 121 to play a role of plugging and guiding. The insulating portion 112 is disposed corresponding to the first connection port 111 and protrudes from the side wall of the housing, and the insulating portion 112 may be disposed only on the lower side edge of the first connection port 111 or may be disposed around the first connection port 111.

In this embodiment, as shown in fig. 2, the connector 451 includes a first contact piece and a second contact piece, where one end of the second contact piece is bent and connected to the first contact piece, and the other end of the second contact piece is spaced from the first contact piece, so that a slot is formed by a gap between the first contact piece and the second contact piece, the first contact piece is in a straight plate structure, and the first contact piece is formed by a static contact plate of an N-pole static contact, or by a connecting plate connected to the first terminal 251 of the coil 25, so that space occupied by the slot can be saved, cost is reduced, the middle part of the second contact piece is bent and approaches to the first contact piece, so that a middle gap of the slot is narrowest, and the connector 451 is similar to a hairpin shape as a whole, so that elastic plug-in fit with the connector pieces 44 of the first and second connector pieces 42, 43 is facilitated to keep the connection stable.

In the leakage protection module 3, a button slot is provided at the upper portion of the second housing 12, two connection terminals are provided in parallel at one end of the second housing 12, one connection terminal is connected to each connection terminal as an L-pole wire outgoing terminal 41-1b, one connection terminal connected to the L-pole wire outgoing terminal 41-1b is a first connection terminal 42, the other connection terminal is an N-pole wire outgoing terminal 41-2b, the connection terminal connected to the N-pole wire outgoing terminal 41-2b is a second connection terminal 43, the first connection terminal 42 is connected to an L-pole lead-out conductive member, the second connection terminal 43 is connected to an N-pole lead-out conductive member, at this time, one end of the housing of the whole circuit breaker is provided with one L-pole wire incoming terminal 41-1a, one N-pole wire incoming terminal 41-2a, and the other end of the housing is provided with one L-pole wire outgoing terminal 41-1b and one N-pole wire outgoing terminal 41-2b.

Two second wiring ports 121 are arranged on the side wall of the second shell 12 facing the first shell 11, a zero sequence transformer 34 is assembled at the position corresponding to the second wiring ports 121, a circuit board 35 is arranged on one side of the zero sequence transformer 34 far away from the wiring terminals, an arc-shaped concave area is arranged on one side edge of the circuit board 35, the zero sequence transformer 34 is correspondingly assembled in the arc-shaped concave area, a jack is arranged on the circuit board 35 adjacent to the arc-shaped concave area, a test button 36 is slidingly assembled in a button groove, a first elastic piece 31 is positioned between the test button 36 and the zero sequence transformer 34, a second elastic piece 32 is matched and arranged on one side of the first elastic piece 31 and above the zero sequence transformer 34, a breakpoint is formed between the second end of the first elastic piece 31 and the second end of the second elastic piece 32 relatively, the test button 36 is abutted to the middle part of the first elastic piece 31, the first end of the second elastic piece 32 is spliced with the circuit board 35, the second end of the second elastic piece 32 is connected with the first wiring piece 42 in fig. 5, the middle part of the second elastic piece 32 is electrically disconnected with the first wiring piece 42 relatively, the first end of the first elastic piece 31 relatively forms a breakpoint, the first end of the second elastic piece 31 relatively is connected with the first end of the fourth elastic piece 31 relatively, and the first end of the fourth elastic piece 31 is connected with the first end of the first elastic piece 31 relatively, and the first end of the first needle 31 is relatively connected with the first end of the fourth elastic piece 31 relatively, and the first needle is preferably connected with the first needle 31. A third elastic member 33 is connected to the wiring board 35, and the third elastic member 33 is used for electrically connecting the wiring board 35 to the N-pole outlet terminal 41-2 b.

The zero sequence transformer 34 comprises an iron core, and an electric leakage testing loop winding and an electric leakage detecting winding which are wound outside the iron core, a threading hole is formed in the middle of the iron core, an electric isolation plate 345 is arranged in the threading hole, the threading hole is divided into a first threading hole and a second threading hole which are parallel to each other by the electric isolation plate 345, preferably, the first threading hole and the second threading hole are respectively in one-to-one correspondence with the two second wiring openings 121, the first wiring lugs 42 and the second wiring lugs 43 correspondingly penetrate through the two second wiring openings 121 to form two parallel inserting pieces 44, the two inserting pieces 44 are inserted into the inserting portions 451 of the two leading-out conducting pieces, and electric isolation between the first wiring lugs 42 and the second wiring lugs 43 is realized by the electric isolation plate 345.

The leakage current testing loop winding comprises a third pin and a fourth pin, the fourth pin is abutted with the first elastic component 31, the third pin is spliced with the circuit board 35, the leakage current testing loop winding comprises a first pin and a second pin, the first pin and the second pin are respectively connected with the circuit board 35, the first pin, the second pin and the third pin are located on the same side of the iron core, the fourth pin is located on the other side of the iron core, namely, the first pin, the second pin and the third pin are all extended side by side along the radial direction of the iron core, the fourth pin is extended outwards along the tangential direction of the iron core, the fourth pin is located on one side close to the first elastic component 31, jacks for splicing the first pin, the second pin and the third pin are arranged on the edge of the arc-shaped concave area of the circuit board 35, namely, the first jack, the second jack and the third jack are arranged, and the first pin, the second pin and the third pin of the zero sequence transformer 34 can be connected with the circuit board 35 in a soldering mode.

As shown in fig. 5 and 6, the first connection piece 42 includes a first conductive plate 42a, an extension plate 42c and a second conductive plate 42b that are integrally formed, at this time, one end of the first conductive plate 42a is used as a first end of the first connection piece 42 and connected to one of the N-pole wire outgoing terminals 41-2b or the L-pole wire outgoing terminal 41-1b, in which the first end of the first connection piece 42 is connected to the L-pole wire outgoing terminal 41-1b, the other end of the first conductive plate 42a is bent to a side facing away from the L-pole wire outgoing terminal 41-1b, so that the first conductive plate 42a is integrally L-shaped, one end of the extension plate 42c is connected to the other end of the first conductive plate 42a, the other end of the extension plate 42c is bent in a direction away from the first conductive plate 42a, the other end of the extension plate 42c is upwards bent, so that the extension plate 42c is integrally in an L-shaped structure, a plate surface of the extension plate 42c is perpendicular to the plate surface of the first conductive plate 42a, a first abutting groove 421 is formed on a side of the extension plate 42c, a second abutting piece 421 is formed on the side of the extension plate 42c, the second elastic piece 421 is abutted to the first end of the first conductive plate 32b is omitted, and the second conductive plate is abutted to the second conductive plate is led out of the second conductive plate 34, and is separated from the first conductive plate 34, and the second conductive plate is separated from the first end 34, and the second conductive plate is separated from the first conductive plate 34, and the middle portion is separated from the first conductive plate and the second conductive plate, and the middle portion is separated from the first conductive plate and the middle portion is separated from the first conductive plate and the second conductive plate and the middle conductive plate and the second conductive plate and has a mutual inductor and the mutual inductor.

As shown in fig. 5 and 6, the second lug 43 is in an L-shaped plate structure, the second lug 43 is disposed between the connection terminal and the circuit board 35 along the vertical direction in the drawing and is disposed near a side of the zero sequence transformer 34 opposite to the second connection port 121, a second abutting groove 431 is formed at a first end side of the second lug 43, a second end of the third elastic member 33 abuts against the second abutting groove 431, the third elastic member 33 in fig. 5 is preferably a torsion spring, in addition, a first end of the second lug 43 is connected with the N-pole outlet terminal 41-2b through a wire, preferably a connection conductive plate is further connected between the wire and the N-pole outlet terminal 41-2b, and the second end of the second lug 43 sequentially passes through the second threading hole of the zero sequence transformer 34 and one second connection port 121 of the second housing 12 to form the connection plug 44.

In the present embodiment, during the process of plugging and unplugging the leakage protection module 3 to and from the circuit breaker pole 2, the first lug 42 and the second lug 43 are fixed by the side wall of the second housing 12 in a matching manner, so as to prevent shaking.

A second embodiment is provided in connection with fig. 6-9, in which one tab extends outside the second housing 12 to mate with one outgoing conductor, and the other outgoing conductor extends to the second housing 12 to mate with the other tab, i.e., the mating portion 451 of one outgoing conductor extends outside the first housing 11 through the first mating opening 111 to mate with the other tab in the second housing 12.

Unlike the above-described L pole, which is assembled together in the same first housing 11 as the first embodiment, in which the L pole is arranged in parallel with the N pole, in which the N pole includes the same N pole incoming line terminal 41-2a as the above-described N pole, the N pole contact mechanism, and the outgoing conductor connected to the N pole stationary contact, the L pole includes the same L pole incoming line terminal 41-1a as the above-described L pole, the arc extinguishing chamber, the L pole contact mechanism, the short circuit protection mechanism, and the overload protection mechanism, in which the first terminal 251 of the coil 25 is used as the outgoing conductor of the L pole, preferably the first terminal 251 of the coil 25 also extends outwardly in the direction perpendicular to the plane of the arc extinguishing chamber, that is, the first terminal 251 of the coil 25 extends outwardly in the thickness direction of the breaker pole 2, and correspondingly extends into the second housing 12, a conductive region is formed at the end of the first terminal 251 of the coil 25, which can be used as the plug-in contact portion 451 and the protection tab 3, and which preferably passes through the first terminal region 111 of the first terminal module 11, after the plug-in the first terminal region 451 of the coil 25 is formed by the first terminal contact tab layer of the first terminal module 11.

The leakage protection module 3 is assembled in the second housing 12 with the same structure as the first embodiment, the leakage protection module 3 includes the same L-pole wire outlet terminal 41-1b, the same N-pole wire outlet terminal 41-2b, the zero sequence transformer 34 and the circuit board 35, wherein the second lug 43 connected to the N-pole wire outlet terminal 41-2b is the same as the second lug 43 with the first embodiment, the third elastic member 33 is connected between the circuit board 35 and the second lug 43, the second end of the third elastic member 33 is abutted against the second abutting groove 431 of the second lug 43, and unlike the leakage protection module 3, the first lug 42 connected to the L-pole wire outlet terminal 41-1b no longer passes through the threading hole of the zero sequence transformer 34, the first terminal 251 of the coil 25 passes through the first threading hole of the zero sequence transformer 34, and the first lug 42 is spliced with the conductive area of the first terminal 251. In addition, a test button 36, a first elastic member 31 and a second elastic member 32 are also disposed above the zero sequence transformer 34, wherein the first elastic member 31 is connected with the zero sequence transformer 34, one end of the second elastic member 32 is connected with the circuit board 35, and the second elastic member 32 is connected with a conductive area of the first terminal 251 to obtain electricity.

As shown in fig. 8, the first connection piece 42 includes a first conductive plate 42a and a second conductive plate 42b that are integrally formed, one end of the first conductive plate 42a is connected to one connection terminal (L-pole outlet terminal 41-1 b) as a first end of the first connection piece 42, the other end of the first conductive plate 42a is bent to a side far away from the L-pole outlet terminal 41-1b, the first conductive plate 42a is integrally formed in an L-shaped structure, one end of the second conductive plate 42b is connected to an edge side of the first conductive plate 42a, the second conductive plate 42b extends along a direction far away from the first conductive plate 42a and is close to a threading hole of the zero-sequence transformer 34, the first connection piece 42 does not pass through the threading hole of the zero-sequence transformer 34, which is beneficial to shorten the length of the first connection piece 42, reduce the space occupied by the first connection piece 42, the plate surface of the second conductive plate 42b is disposed along a side of the second connection piece 121 in fig. 8, the second conductive plate 42b is used as the second end of the first connecting piece 42, the plate surface of the second conductive plate 42b is perpendicular to the plate surface of the first conductive plate 42a, a first abutting groove 421 is formed at the side of the second conductive plate 42b, preferably the first abutting groove 421 is located at the lower edge of the second conductive plate 42b, the first abutting groove 421 corresponds to the threading hole of the zero sequence transformer 34, the first terminal 251 of the coil 25 can be correspondingly inserted into the first abutting groove 421, the conductive area of the first terminal 251 is matched with the abutting of the first abutting groove 421, so that the L-phase main circuit between the leakage protection module 3 and the L-pole can be connected, the first terminal 251 can be regarded as an abutting plug part 451 extending into the second housing 12, the second elastic piece 32 abuts against the conductive area of the first terminal 251, the first terminal 251 is matched with the abutting groove 421 by the conductive area, the wiring is convenient, the wire is omitted and the occupied space is small.

As a third embodiment, when the two connection tabs penetrate the second housing 12, the two connection tabs sequentially penetrate the second connection opening 121 and the first connection opening 111 and extend into the first housing 11, that is, the two connection tabs respectively correspond to the first threading holes and the second threading holes of the zero sequence transformer 34 and then are respectively in plug-in fit with the two lead-out conductive pieces, preferably, in this embodiment, the plug-in portion 451 is disposed on the two connection tabs, the plug-in piece 44 is disposed at one end of the lead-out conductive pieces, the plug-in portion 451 can be selected from the same slots as the above embodiment, and of course, the plug-in portion 451 includes two first contact pieces and second contact pieces disposed at intervals, and the structure of the plug-in portion 451 and the plug-in piece 44 is a concave-convex structure matched with each other.

In addition, when the circuit breaker includes three L poles, one N pole and the earth leakage protection module 3, one of the L poles and one N pole may be assembled together in one first housing 11 adjacent to the earth leakage protection module 3, and the earth leakage protection module 3 and the L poles and the N pole adopt the connection modes of the three embodiments, or three L poles and one N pole are assembled in four first housings 11 respectively, one of the lead-out conductive members may pass through the adjacent first housing 11, so that the two lead-out conductive members extend to the middle of the same side wall of the same first housing 11 side by side, preferably, the lead-out conductive members and the connection lugs correspond to the threading holes of the zero sequence transformer 34, and the earth leakage protection module 3 may adopt the structures of the three embodiments.

It should be noted that, in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate an orientation or a positional relationship based on that shown in the drawings or an orientation or a positional relationship conventionally put in use, and are merely for convenience of description, and do not indicate that the apparatus or element to be referred to must have a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating relative importance.

The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.

Claims

1. The leakage protection module comprises a second shell (12), wherein a leakage detection circuit and a leakage tripping mechanism driven by the leakage detection circuit are assembled in the second shell (12), the leakage detection circuit comprises two wiring terminals and a zero sequence transformer (34), the leakage protection module is characterized in that the leakage protection module (3) is assembled on one side of a circuit breaker pole (2), a second wiring port (121) is formed in the side wall of the second shell (12) adjacent to the circuit breaker pole (2), the zero sequence transformer (34) is located in the middle of the second shell (12), the second wiring port (121) is located at a position on the side wall of the second shell (12) opposite to a threading hole of the zero sequence transformer (34), two wiring terminals are arranged at the same end of the second shell (12), the two wiring terminals are an L-pole outgoing terminal (41-1 b) and an N-pole outgoing terminal (41-2 b) respectively, one end of the at least one wiring terminal is connected with the wiring terminal, the other end of the at least one wiring terminal penetrates through the zero sequence transformer (34) to form a second wiring port (44) opposite to the second wiring port (44) of the second shell (12).

2. The leakage protection module according to claim 1, wherein a circuit board (35) is arranged on one side of the zero sequence transformer (34) far away from the wiring terminal, an arc-shaped concave area is formed in one side edge of the circuit board (35), the zero sequence transformer (34) is correspondingly assembled in the arc-shaped concave area, the circuit board (35) is connected with the zero sequence transformer (34), a controller for driving a leakage tripping mechanism is arranged on the circuit board (35), the leakage tripping mechanism comprises a tripper (37) driven by a leakage detection circuit, a push plate (39) and an indicator (38) are correspondingly arranged on one side of a push rod of the tripper (37), and a avoidance hole is formed in the side wall of the second shell (12) corresponding to the push plate (39).

3. The leakage protection module according to claim 1, wherein the leakage detection circuit comprises two connection lugs, one ends of the two connection lugs are respectively connected with the two connection terminals, and the other ends of the two connection lugs pass through threading holes of the zero sequence transformer (34) to form two connection lugs (44) which are arranged side by side.

4. The earth leakage protection module according to claim 3, wherein the zero sequence transformer (34) is provided with an electrical isolation plate (345) in the threading hole, the electrical isolation plate (345) divides the threading hole into a first threading hole and a second threading hole, and the two wiring lugs respectively penetrate through the first threading hole and the second threading hole.

5. The earth leakage protection module of claim 1, wherein:

The wiring lug connected with the L pole wire outlet terminal (41-1 b) is a first wiring lug (42), the first wiring lug (42) is positioned at one side of the zero sequence transformer (34) and does not pass through a threading hole of the zero sequence transformer (34) or the first wiring lug (42) passes through the threading hole of the zero sequence transformer (34),

The wiring piece connected to the N pole wire outlet terminal (41-2 b) is a second wiring piece (43), and the second wiring piece (43) penetrates through the threading hole of the zero sequence transformer (34).

6. The earth leakage protection module of claim 5, wherein the first tab (42) passes through the threading hole of the zero sequence transformer (34), the first tab (42) comprises a first conductive plate (42 a), a second conductive plate (42 b) and an extension plate (42 c),

One end of the first conductive plate (42 a) is used as a first end of the first wiring lug (42) to be connected with the L-pole wire outlet terminal (41-1 b), the other end of the first conductive plate (42 a) is bent towards one side away from the L-pole wire outlet terminal (41-1 b),

One end of the extension plate (42 c) is connected with the other end side of the first conductive plate (42 a), the other end of the extension plate (42 c) is bent in a direction away from the first conductive plate (42 a),

The second conducting plate (42 b) is used as the second end of the first lug plate (42), one end of the second conducting plate (42 b) is connected to the side, far away from the first conducting plate (42 a), of the extension plate (42 c), and the other end of the second conducting plate (42 b) penetrates through the threading hole of the zero sequence transformer (34).

7. The leakage protection module according to claim 6, wherein a first abutting groove (421) is formed on the side of the extension plate (42 c), a leakage test circuit is further installed in the second housing (12),

The electric leakage testing circuit comprises a testing button (36), a first elastic piece (31) and a second elastic piece (32), wherein the first elastic piece (31) and the second elastic piece (32) are matched to form a breakpoint of the electric leakage testing circuit;

the leakage detection circuit comprises a circuit board (35) connected with the zero sequence transformer (34);

One end of the second elastic member (32) is elastically abutted against the first abutting groove (421), and the other end is connected with the circuit board (35).

8. The earth leakage protection module of claim 5, wherein the first tab (42) does not pass through the threading hole of the zero sequence transformer (34), the first tab (42) comprises a first conductive plate (42 a) and a second conductive plate (42 b),

One end of the first conductive plate (42 a) is used as a first end of the first wiring lug (42) to be connected with the L-pole wire outlet terminal (41-1 b), the other end of the first conductive plate (42 a) is bent towards one side far away from the L-pole wire outlet terminal (41-1 b),

The second conductive plate (42 b) is used as a second end of the first wiring lug (42), one end of the second conductive plate (42 b) is connected with the other end side of the first conductive plate (42 a), and the second conductive plate (42 b) extends along the direction away from the first conductive plate (42 a) and is close to the threading hole of the zero sequence transformer (34).

9. The earth leakage protection module according to claim 8, characterized in that a first abutting groove (421) is formed on the other end side of the second conductive plate (42 b), and the first abutting groove (421) corresponds to the threading hole of the zero sequence transformer (34).

10. The earth leakage protection module according to claim 5, wherein the second connection piece (43) is integrally in a plate-shaped structure, the second connection piece (43) is electrically connected with the N-pole wire outlet terminal (41-2 b), and the second end of the second connection piece (43) passes through the threading hole of the zero sequence transformer (34) to form a connection plug piece (44).

11. The earth leakage protection module of claim 10, wherein the second terminal (43) has a second contact groove (431) formed on a first end side thereof,

The electric leakage detection circuit comprises a third elastic piece (33) and a circuit board (35) connected with the zero sequence transformer (34);

one end of the third elastic member (33) is elastically abutted against the second abutting groove (431), and the other end is connected with the circuit board (35).