CN218215158U - Leakage protection module - Google Patents

Abstract

The utility model provides an earth leakage protection module, includes the second casing be equipped with leakage detection circuitry and by leakage detection circuitry driven electric leakage tripping device in the second casing, leakage detection circuitry includes two binding post and zero sequence transformer, leakage detection circuitry still includes at least one lug, and the 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 and connect the inserted sheet, connects the second wiring mouth of inserted sheet and second casing lateral wall to set up relatively. The utility model discloses a modular earth leakage protection module, the terminal strip of connection on binding post forms and connects the inserted sheet, makes earth leakage protection module be connected with the circuit breaker utmost point through the grafting mode to get the electricity from the major loop of the circuit breaker utmost point, connect earth leakage protection module and circuit breaker utmost point through the wire with replacing prior art, be favorable to realizing the automatic assembly of earth leakage protection module and circuit breaker utmost point, accord with the modularization development of circuit breaker.

Description

Leakage protection module

Technical Field

The utility model relates to a low-voltage apparatus field, concretely relates to earth leakage protection module.

Background

The low-voltage circuit breaker can be used for distributing electric energy and protecting overload and short circuit of lines and power supply equipment, and can also be used for infrequent line switching and infrequent motor starting. With the continuous development of the internet of things technology and the artificial intelligence technology, the low-voltage circuit breaker is small in size and modularized.

The existing low-voltage circuit breaker usually has an electric leakage protection function, but the circuit breaker with the electric leakage protection function usually adopts an integrated structure, namely, the circuit breaker pole and the electric leakage protection module are integrated in the same installation cavity of the shell, the structure can not meet the modular development trend of the existing circuit breaker, and the wiring process of the electric leakage protection module and the circuit breaker pole is more tedious and is not beneficial to automatic production.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's defect, provide a wiring convenience and satisfy the earth-leakage protection module of modularization development.

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

the utility model provides an earth leakage protection module, includes the second casing be equipped with leakage detection circuitry and by leakage detection circuitry driven electric leakage tripping device in the second casing, leakage detection circuitry includes two binding post and zero sequence transformer, leakage detection circuitry still includes at least one lug, and the 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 and connect the inserted sheet, connects the second wiring mouth of inserted sheet and second casing lateral wall to set up relatively.

Furthermore, the second wiring port is located on the side wall of the second shell and is opposite to the threading hole of the zero sequence transformer.

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

Furthermore, the zero sequence transformer is provided with an electrical isolation plate in the threading hole, the electrical isolation plate divides the threading hole into a first threading hole and a second threading hole, and the two lugs pass through the first threading hole and the second threading hole respectively.

Furthermore, the two connection terminals are an L-pole outlet terminal and an N-pole outlet terminal respectively,

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

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

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

one end of the first conductive plate is used as the first end of the first lug plate and is connected with the L-pole outgoing line terminal, the other end of the first conductive plate is bent to the side departing from the L-pole outgoing line terminal,

one end of the extending plate is connected with the side of the other end of the first current-conducting plate, the other end of the extending plate is bent towards the direction far away from the first current-conducting plate,

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

Furthermore, a first abutting groove is arranged on the side of the extension plate, a leakage test loop is also assembled in the second shell,

the electric leakage test loop comprises a test 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 test loop;

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

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

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

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

the second current conducting plate is used as the second end of the first lug plate, one end of the second current conducting plate is connected with the side of the other end of the first current conducting plate, and the second current conducting plate extends in the direction far away from the first current conducting plate and is close to the threading hole of the zero sequence transformer.

Furthermore, a first butt joint groove is formed in the side of the other end of the second current conducting plate, and the first butt joint groove corresponds to the threading hole of the zero sequence transformer.

Furthermore, the second lug plate is integrally of a plate-shaped structure and is electrically connected with the N-pole outgoing line terminal, and the second end of the second lug plate penetrates through a threading hole of the zero sequence transformer to form a plug-in sheet.

Furthermore, a second abutting groove is arranged at the side of the first end of the second lug plate,

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

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

The utility model discloses an earth leakage protection module adopts modular earth leakage protection module, and the lug plate of connection on binding post forms and connects the inserted sheet, makes earth leakage protection module be connected with the circuit breaker utmost point through the grafting mode to get the electricity from the major loop of the circuit breaker utmost point, connect earth leakage protection module and circuit breaker utmost point through the wire with replacing prior art, be favorable to realizing the automatic assembly of earth leakage protection module and circuit breaker utmost point, accord with the modularization development of circuit breaker.

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

In addition, the threading hole of the zero sequence transformer is provided with an electrical isolation plate, so that the first lug plate and the second lug plate are electrically isolated.

In addition, the first lug can pass through or not pass through the threading hole of the zero sequence transformer, and 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 structural diagram of a first housing in the present invention;

fig. 3 is a schematic structural diagram of the middle leakage protection module of the present invention;

fig. 4 is a schematic structural diagram of a second housing in the present invention;

fig. 5 is a schematic diagram of the internal structure of the middle leakage protection module of the present invention;

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

fig. 7 is a schematic diagram of the internal structure of the earth leakage protection module of the present invention (the first terminal of the coil is used as the lead-out conductive member);

fig. 8 is a schematic structural diagram (a second structure) of the zero sequence transformer, the first lug plate and the second lug plate in the present invention;

fig. 9 is a schematic diagram of the structure of the coil of the present invention (the first terminal of the coil is used as the lead-out conductive member).

Detailed Description

The following describes a specific embodiment of the earth leakage protection module according to the present invention with reference to the embodiments shown in fig. 1 to 9. The earth leakage protection module of the present invention is not limited to the description of the following embodiments.

The utility model provides an earth leakage protection module, includes second casing 12 be equipped with the electric leakage detection circuit in the second casing 12 and by electric leakage detection circuit driven electric leakage tripping device, the electric leakage detection circuit includes two binding post and zero sequence transformer 34, the electric leakage detection circuit still includes at least one lug, and the one end and the 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 the inserted sheet 44, connects the second wiring mouth 121 relative setting of inserted sheet 44 and second casing 12 lateral wall.

The utility model discloses an earth leakage protection module 3 adopts modular earth leakage protection module 3, and the lug plate of connection on binding post forms and connects inserted sheet 44, makes earth leakage protection module 3 be connected with circuit breaker utmost point 2 through the grafting mode to get the electricity from the major loop of circuit breaker utmost point 2, connect earth leakage protection module 3 and circuit breaker utmost point 2 through the wire in order to replace prior art, be favorable to realizing the automatic assembly of earth leakage protection module 3 and circuit breaker utmost point 2, accord with the modular development of circuit breaker.

As shown in fig. 1 to 9, the circuit breaker includes a housing, at least one circuit breaker pole 2 is disposed in the housing, the housing includes at least one installation cavity for assembling the circuit breaker pole 2, when a plurality of installation cavities are disposed in the housing, the housing may include a plurality of fixed partitions disposed inside the housing, the installation cavity is formed by an interval between two adjacent partitions, or the housing includes an upper cover, a base and a partition assembled between the upper cover and the base, wherein the installation cavity is formed by the upper cover and a partition cover, the base and another partition form another installation cavity, the other partitions respectively form a plurality of independent installation cavities in two-by-two opposite directions, such independent installation cavities may serve as first housings 11, two adjacent first housings 11 may be assembled together, and thus, the housing of the circuit breaker includes a plurality of assembled first housings 11.

A phase main line is provided in each breaker pole 2, that is, an N-phase main line or an L-phase main line is provided in each breaker pole 2, for example, four breaker poles are provided in the breaker, wherein three breaker poles are L poles and are respectively provided with an L-phase main line and an operating mechanism, and one breaker pole is provided with an N-phase main line and an operating mechanism, or two breaker poles are provided in the breaker, and both breaker poles are L poles, or L pole and N pole, respectively. Naturally, it is also possible to provide two-phase main lines simultaneously in the same breaker pole 2, for example, to provide an L-phase main line and an N-phase main line simultaneously in one breaker pole, or to provide two-phase L-phase main lines simultaneously in one breaker pole, and preferably to provide only one operating mechanism in the same breaker pole.

This embodiment uses two circuit breaker utmost point 2 as an example, only sets up a looks main line in every circuit breaker utmost point 2, and one of them circuit breaker utmost point 2 is equipped with L looks main line as the L utmost point that is exactly, and another circuit breaker utmost point 2 is equipped with N looks main line as the N utmost point, forms the main loop of circuit breaker jointly by L looks main line and N looks main line, and the L utmost point and N utmost point assemble in same installation cavity jointly, and the L utmost point, N extremely set up in same first casing 11 jointly promptly.

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

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

The operating mechanism of each circuit breaker pole 2 comprises a lever which is rotatably assembled in the shell, the lever can be rotatably connected with the side wall of one side of the shell or a partition plate in the shell or the side wall of the first shell 11, a jump buckle and a lock catch are rotatably assembled on the lever, a moving contact is rotatably installed through a contact support and is linked with the lever, the jump buckle is in hasp fit with one end of the lock catch, the other end of the jump buckle 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 the side wall of one side of the shell corresponding to the linkage part or the partition plate in the shell or the side wall of the first shell 11, and 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, two elastic arms of the energy storage spring are respectively abutted against the contact support and the lever, and the energy storage spring is preferably a torsion spring which is coaxially and rotatably 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 on 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 can not be arranged in the N pole. Of course, the N pole may also be provided with a short-circuit protection mechanism, an arc extinguishing system and an overload protection mechanism 26, i.e. a structure similar to an L pole is adopted as the N pole. In addition, the operating mechanisms 22 of adjacent circuit breaker poles 2 may share part of the parts, such as levers, contact supports, jumpers, etc., and the handle mechanisms 21 and latches are linked.

An accessory module is further disposed on one side of one of the breaker poles 2, that is, the accessory module is disposed on one side of the first casing, the accessory module of this embodiment takes the earth leakage protection module 3 as an example, as shown in fig. 3-9, preferably, the earth leakage protection module 3 includes a second casing 12, the second casing 12 is spliced with a first casing 11 to form a breaker with an earth leakage protection function, in this case, the casing includes a second casing 12 and at least one first casing 11, an earth leakage detection circuit and an earth leakage tripping mechanism are assembled in the second casing 12, wherein the earth leakage tripping mechanism includes a tripping device 37 driven by the earth leakage detection circuit, the earth leakage detection circuit includes a circuit board 35 and a zero sequence transformer 34 connected with the circuit board 35, be provided with the controller that is used for driving electric leakage tripping device at circuit board 35, zero sequence mutual inductor 34 is connected with L looks main line, N looks main line and is used for detecting the leakage signal, can drive the ejector pin action of tripper 37 when electric leakage detection circuit detects the leakage fault, after the ejector pin is accomplished and is moved, ejector pin one side correspondence at tripper 37 is provided with push pedal 39 and indicator 38, be equipped with the hole of dodging at the second casing 12 lateral wall that corresponds with push pedal 39, the linkage portion of adjacent circuit breaker utmost point 2 passes the hole of dodging and push pedal 39 cooperation, when the leakage fault takes place, tripper 37 triggers push pedal 39 and rotates, thereby make linkage portion drive the hasp rotation and make operating device dropout, indicator 38 moves and indicates the electric leakage, the electric leakage tripping device of this embodiment can adopt prior art.

The leakage protection module 3 is further provided with a leakage test mechanism, the leakage test mechanism comprises a leakage test loop which gets electricity from a main loop, the leakage test loop comprises a test button 36, a first elastic piece 31 and a second elastic piece 32, the test button 36 is assembled on the second shell 12 in a sliding mode, the first elastic piece 31 and the second elastic piece 32 are matched to form a breakpoint of the leakage test loop, the test button 36 is pressed to enable the first elastic piece 31 to generate elastic deformation so as to connect the breakpoint of the leakage test loop, preferably, a leakage test loop winding of a zero sequence transformer 34 is further connected in series in the leakage test loop, and the leakage detection winding of the zero sequence transformer 34 is connected with the circuit board 35.

An improvement point of this application lies in, accessory module and circuit breaker utmost point 2 are modular structure respectively, accessory module also adopts two modular structure to assemble with the assembly of circuit breaker utmost point 2, the earth leakage protection module 3 that also is this embodiment adopts modular structure, the second casing 12 of earth leakage protection module 3 and the first casing 11 of circuit breaker utmost point 2 assemble, assemble the shell that forms the circuit breaker by first casing 11 and second casing 12, and simultaneously, earth leakage protection module 3 assembles and can realize simultaneously getting from the main loop of circuit breaker utmost point 2 in one side of circuit breaker utmost point 2, it inserts in the main loop of circuit breaker to prefer earth leakage protection module 3 to adopt the mode of plug connection, that is, earth leakage protection module 3 adopts the mode of plug connection to insert in the L looks main line of circuit breaker utmost point 2, in the N looks main line. It should be noted that, as another embodiment, the power taking of the L-phase main line and the N-phase main line of the earth 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 plug-in connection.

Specifically, a wiring port is formed in a side wall of the first casing 11 adjacent to the second casing 12, at least one leading-out conductive member 45 is connected to an L-phase main line or an N-phase main line of the breaker pole, a terminal of the earth leakage protection module 3 is connected to a lug, the leading-out conductive member 45 and/or the lug form a plug-in connection structure connected to the main circuit through the wiring port, and the leading-out conductive member 45 and/or the lug of the plug-in connection structure penetrate through a threading hole of the zero sequence transformer 34. Preferably, at least one of the lead-out conductive members 45 is provided with a patch portion 451, the patch portion 451 corresponding to the first wiring port 111 of the side wall of the first housing 11; a plug-in sheet 44 is formed at one end of the lug sheet, the plug-in sheet 44 passes through the threading hole of the zero sequence transformer 34, and the plug-in sheet 44 corresponds to the second wiring port 121 on the side wall of the second shell 12; preferably, the plug 44 is a sheet-like structure, the plug portion 451 is a slot extending into the first connection port 111, and the plug 44 extends out of the second housing 12 and is inserted into the plug portion 451 to be plugged and matched with the plug portion 451. Of course, as another embodiment, the connection portion 451 may extend from the first housing 11 and extend into the second housing 12 to be inserted and engaged. As another embodiment, the patch panel may be provided with a plug portion 451, one end of the leading-out conductive member may be formed with a plug piece 44, and the plug piece 44 may be inserted into the plug portion 451 for plug-in engagement. By the lug with draw the plug connection structure that electrically conductive cooperation formed, make the major loop pass zero sequence transformer 34's through wires hole when realizing that earth leakage protection module 3 is connected the electricity with circuit breaker utmost point 3, left out the wire, do benefit to and reduce the volume of circuit breaker, make earth leakage protection module 3 and circuit breaker utmost point 2 be two independent modules, satisfy the modularization development of circuit breaker.

Preferably, the leading-out conductive pieces are connected with the main circuit of the circuit breaker, namely, the leading-out conductive pieces are respectively connected with the N-phase main circuit and one L-phase main circuit of the circuit breaker pole 2, the side walls of the first shell 11 and the second shell 12 adjacent to each other are respectively provided with a wiring port corresponding to the lead-out conductive member, namely, the wiring ports are arranged on the side wall of the shell in the thickness direction of the 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 arranged in the middle of the side wall of the first shell 11 and a second wiring port 121 arranged in the middle of the side wall of the second shell 12, wherein the number of the first wire connection ports 111 may correspond to the number of the leading-out conductive members, the number of the second wire connection ports 121 corresponds to the number of the wire connection pieces one by one, or only one first wire connection port 111 and one second wire connection port 121 may be disposed at one side of the first housing 11 and one side of the second housing 12, so that two leading-out conductive members correspond to the same first wire connection port 111, two wire connection pieces correspond to the same second wire connection port of the second housing 12, in addition, the two leading-out conductive members can extend into the second shell 12 to be respectively spliced with the two lugs, or, the two lugs extend out of the second housing 12 and are respectively inserted into the two leading-out conductive members, or, one leading-out conductive piece extends into the second housing 12 to be inserted into one lug, the other lug extends out of the second housing 12 to be inserted into the other leading-out conductive piece, the wiring ports can correspond to the leading-out conductive pieces and the number of the lugs one by one, or only one wiring port can be arranged on one side of the first housing 11 and one side of the second housing 12, so that the two leading-out conductive pieces extend out from the same wiring port of the first housing 11, and the two lugs extend out from the same wiring port of the second housing 12; earth leakage protection module 3 includes two binding post, and every binding post is connected with a lug that stretches out outside earth leakage protection module 3, and the lug adopts the plug to be connected with drawing electrically conductive piece, so, when making earth leakage protection module 3 peg graft with circuit breaker 2 extremely, make two lugs can be respectively with L looks main line, N looks main line grafting get the electricity. Of course, other accessory modules of the circuit breaker can be connected with the main loop of the circuit breaker pole 2 in such a wiring mode to take power.

Preferably, each breaker pole 2 comprises an incoming line terminal and an outgoing line terminal which are respectively arranged at two ends of the first shell 11, a phase main line is connected between the incoming line terminal and the outgoing line terminal, and the two connecting terminals of the leakage protection module 3 are an L pole outgoing line terminal 41-1b and an N pole outgoing line terminal 41-2b respectively, so that the structure does not influence the electricity taking of the leakage protection module 3 from a main loop of the breaker pole 2, and can also ensure that the normal wiring use of the breaker pole 2 is not influenced when the leakage protection module 3 is not spliced; the outlet terminal of the circuit breaker pole 2 can be omitted after the earth leakage protection module 3 is spliced, and the outlet terminal can be shielded by the shielding plate.

Certainly, only an incoming line terminal or an 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 at one end of the first housing 11 in parallel, the leakage protection module 3 includes two connection terminals disposed at the same end of the second housing 12, the two connection terminals are 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 and the breaker pole 2 are spliced, the breaker can be normally connected, and used, and this structure can save an internal space of the breaker.

Furthermore, the leading-out conductive member is provided with an elastic patch part 451, at least one end of the first housing 11 is provided with a wiring terminal, one side wall of the first housing 11 is provided with two first wiring ports 111, each patch part 451 is correspondingly provided with a slot and corresponds to one first wiring port 111, at this time, each patch part 451 is provided with a slot, each contact part 451 is matched with one first wiring port 111, one side wall of the second housing 12 is provided with two second wiring ports 121, the two wiring tabs respectively correspond to the second wiring ports 121 to form a patch 44 and correspondingly connect with one patch part 451 in a plug-in manner, preferably, the slots can sequentially pass through the first wiring ports 111 and the second wiring ports 121 to be plugged with the wiring tabs, and certainly, the wiring tabs sequentially pass through the second wiring ports 121 and the first wiring ports 111 to be plugged with the slots.

Further, the terminal strip and/or the lead-out conductive member correspondingly penetrate through the threading hole of the zero sequence transformer 34, preferably, the first terminal strip 111 and the second terminal strip 121 correspond to the threading hole of the zero sequence transformer 34, at this time, the first terminal strip 111 and the second terminal strip 121 are respectively located in the middle of the side walls of the first casing 11 and the second casing 12, so that the length of the terminal strip and the lead-out conductive member can be shortened and the occupied space of the terminal strip can be reduced, so that the lead-out conductive member is preferably connected to a component arranged in the middle of the L pole and the N pole, such as a fixed contact of a contact mechanism, a short-circuit protection mechanism and the like, in this embodiment, the short-circuit protection mechanism is located in the middle of the first casing 11, the zero sequence transformer 34 is located in the middle of the second casing 12, the short-circuit protection mechanism corresponds to the zero sequence transformer 34, preferably, the lead-out conductive member of the L pole is connected to the short-circuit protection mechanism, the contact mechanism of the N pole is connected to the N pole, that the first terminal strip 111 is located in the position of the side wall of the casing corresponding to the short-circuit protection mechanism, or the position of the side wall of the second casing 12, the zero sequence transformer, and the threading hole of the second terminal strip is correspondingly arranged in the position corresponding to the terminal strip, and the position of the first terminal strip 111, and the second terminal strip is also suitable for shortening the connection of the first terminal strip, and the connection port, and the connection of the second terminal strip is also suitable for shortening the connection of the first terminal strip.

Correspondingly, the electric leakage test loop of the electric leakage protection module 3 takes electricity from the main loop, preferably, the second elastic element 32 is used as one electricity taking end of the electric leakage test loop to be electrically connected with the L-pole outgoing line terminal 41-1b, so that the electric leakage test loop can take electricity from the L-phase main line, the other electricity taking end of the electric leakage test loop is directly or indirectly electrically connected with the N-pole outgoing line terminal 41-2b, the first end of the first elastic element 31 is connected with the zero sequence transformer 34, and the second end of the first elastic element 31 is matched with the second end of the first elastic element 31 to form a breakpoint. In addition, the circuit board 35 in the leakage detection circuit also gets electricity through the second elastic piece 32, the third elastic piece 33 is further connected to the circuit board 35, and the second end of the third elastic piece 33 is connected with the second lug 43 as an electricity getting end of the circuit board 35, so that the circuit board 35 can reduce the number of electricity getting wires while getting electricity from the main loop, improve the space utilization rate and facilitate the reduction of the volume.

Furthermore, the terminal of the zero sequence transformer 34 in the earth leakage protection module 3 is a contact pin, so that the zero sequence transformer 34 can be connected through plugging, 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 small number of used wires.

A first embodiment is provided in connection with fig. 3-6, in which the breaker pole 2 is in plug-in engagement with the earth leakage protection module 3, and two lugs are located in the second housing 12. As shown in fig. 1-3, in the L pole, an L pole inlet terminal 41-1a is disposed at one end of the L pole, that is, an L pole inlet terminal 41-1a is disposed at one end of the first housing 11, the contact mechanism of the L pole includes an L pole moving contact and an L pole stationary contact 231, the L pole moving contact is electrically connected to the L pole inlet terminal 41-1a, the L pole stationary contact 231 is fixed at one side of the arc extinguish chamber, the short-circuit protection mechanism is disposed between the arc extinguish chamber and the handle mechanism, the short-circuit protection mechanism includes a coil assembly, the coil assembly includes a coil frame and a coil 25 wound outside the coil frame, a second terminal of the coil 25 is connected to the L pole stationary contact 231, a connection plate is connected to a first terminal 251 of the coil 25, the connection plate serves as an led-out conductive member of the L pole and extends outward in a direction perpendicular to a plane of the arc extinguish chamber, the connection plate is disposed along a thickness direction of the circuit breaker pole 2, the connection plate is disposed along a gap between the short-circuit protection mechanism and the arc extinguish chamber, and a connection portion 451 is disposed at an end of the connection plate far from the first terminal 251.

An N pole and an L pole are arranged in parallel in the same first shell 11, an N pole inlet terminal 41-2a is arranged at one end of the N pole, namely the L pole inlet terminal 41-1a and the N pole inlet terminal 41-2a are arranged in parallel at one end of the first shell 11, a contact mechanism of the N pole 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, a 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 a coil assembly of the L pole and an arc extinguish chamber, a middle edge side of the static contact plate of the N pole static contact extends outwards to form a leading-out conductive piece, the leading-out conductive pieces of the N pole and the L pole extend towards one side of the first shell 11 in parallel, namely the leading-out conductive piece of the N pole extends towards one side of the second shell 12 along the plane vertical to the arc extinguish chamber, namely the leading-out conductive piece of the N pole extends along the thickness direction of the circuit breaker pole 2, each leading-out conductive member corresponds to one first wiring port 111, each plugging portion 451 leading-out conductive member is matched with the first wiring port 111, the plugging portion 451 is provided with a slot extending out of the first wiring port 111, of course, the slot is also located in the first housing 11 or in the first wiring port 111, preferably, the housing side wall of the first wiring port 111, that is, one side wall of the first housing 11 includes the first cover 13 and the second cover 14 spliced with each other, one of the first wiring ports 111 is located at the splicing position of the first cover 13 and the second cover 14, the splicing structure is favorable for ensuring the electric gap and insulation between the two first wiring ports 111, further, an insulating portion 112 is convexly arranged on the lower side edge of each first wiring port 111, and the insulating portion 112 plays an insulating role, the adjacent leading-out conductive pieces are prevented from being short-circuited, and meanwhile, the short-circuit protection device can be matched with the second wiring port 121 to play a role in inserting and guiding. The insulation portion 112 is disposed corresponding to the first wire connection opening 111 and protrudes out of the side wall of the housing, and the insulation portion 112 may be disposed only at the lower edge of the first wire connection opening 111 or disposed around the first wire connection opening 111.

In this embodiment, as shown in fig. 2, the connection portion 451 includes a first contact piece and a second contact piece, one end of the second contact piece is bent to be connected with 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 in a gap between the first contact piece and the second contact piece, the first contact piece is a straight plate structure, the first contact piece is formed by a stationary contact plate of an N-pole stationary contact, or a first contact piece is formed by a connection plate connected to the first terminal 251 of the coil 25, so that a space occupied by the slot can be saved, and cost can be reduced, the middle portion of the second contact piece is bent and approaches the first contact piece, so that a middle gap of the slot is narrowest, the connection portion 451 is similar to a hairpin shape as a whole, and is convenient for elastic insertion and engagement with the connection pieces 44 of the first lug 42 and the second lug 43, and is favorable for keeping stable connection.

In the earth leakage protection module 3, a button groove is arranged at the upper part of the second casing 12, two connection terminals are arranged in parallel at one end of the second casing 12, each connection terminal is connected with a lug, one connection terminal is used as an L-pole outgoing terminal 41-1b, the lug connected to the L-pole outgoing terminal 41-1b is a first lug 42, the other connection terminal is used as an N-pole outgoing terminal 41-2b, the lug connected to the N-pole outgoing terminal 41-2b is a second lug 43, the first lug 42 is connected with an outgoing conductive piece of an L pole, the second lug 43 is connected with an outgoing conductive piece of an N pole, at this time, one end of the casing of the whole circuit breaker is provided with an L-pole incoming terminal 41-1a and an N-pole incoming terminal 41-2a, and the other end of the casing is provided with an L-pole outgoing terminal 41-1b and an N-pole outgoing terminal 41-2b.

Two second wiring ports 121 are disposed on a side wall of the second housing 12 facing the first housing 11, a zero-sequence transformer 34 is mounted at a position corresponding to the second wiring ports 121, a circuit board 35 is disposed on a side of the zero-sequence transformer 34 away from the wiring terminals, preferably, an arc-shaped recessed area is disposed on an edge of one side of the circuit board 35, the zero-sequence transformer 34 is mounted in the arc-shaped recessed area, a jack is disposed on the circuit board 35 adjacent to the arc-shaped recessed area, a test button 36 is slidably mounted in the button slot, the first elastic member 31 is disposed between the test button 36 and the zero-sequence transformer 34, the second elastic member 32 is disposed on one side of the first elastic member 31 and above the zero-sequence transformer 34 in a matching manner, a second end of the first elastic member 31 and a second end of the second elastic member 32 are spaced and relatively formed a break point, the test button 36 abuts against a middle portion of the first elastic member 31, a first end of the second elastic member 32 is inserted into the circuit board 35, in fig. 5, the second end of the second elastic member 32 is connected with the first wiring tab 42, the middle portion of the second elastic member 32 and the second elastic member are spaced and relatively formed a break point, the first end of the first elastic member 31, the first elastic member is connected with a fourth elastic member, preferably, the first pin 34, and the first elastic member is connected with a fourth elastic member 31, and a fourth elastic pin of the first elastic member 31, and a fourth elastic member is connected with a fourth elastic member. The third elastic member 33 is connected to the wiring board 35, and the third elastic member 33 is used to electrically connect the wiring board 35 to the N-pole outlet terminal 41-2b.

Zero sequence transformer 34 includes the iron core and twines in electric leakage test loop winding, the leakage current detection winding in the iron core outside, is equipped with the through wires hole at the middle part of iron core, is provided with electrical isolation board 345 in the through wires hole, electrical isolation board 345 separates the through wires hole for first through wires hole and the second through wires hole that is parallel to each other, and is preferred, first through wires hole, second through wires hole respectively with two second wiring mouths 121 one-to-one, first lug 42, the corresponding two second wiring mouths 121 of passing of second lug 43 form two parallel connection plate 44, two connect the grafting of inserted sheet 44 and two plug portion 451 of drawing electrically conductive piece, realize by electrical isolation board 345 that first lug 42 connects the electrical isolation between the grafting of inserting piece 43.

Electric leakage test loop winding includes third contact pin and fourth contact pin, fourth contact pin and 31 butt of first elastic component, the third contact pin is pegged graft with circuit board 35, the leakage current detects the winding and includes first contact pin, the second contact pin, first contact pin, the second contact pin is connected with circuit board 35 respectively, wherein, first contact pin, second contact pin and third contact pin are located the same one side of iron core, the fourth contact pin is located the opposite side of iron core, also be first contact pin, second contact pin and third contact pin all extend side by side along the radial of iron core, the outside extension of tangential of iron core is followed to the fourth contact pin, make the fourth contact pin be located the one side that is close to first elastic component 31, arc depressed area edge at circuit board 35 is provided with and is used for pegging graft first contact pin, the jack of second contact pin and third contact pin, also be first jack, second jack and third jack, the first contact pin of zero sequence mutual-inductor 34, second contact pin and third contact pin can be connected with circuit board 35 tin soldering.

As shown in fig. 5 and 6, the first tab 42 includes a first conductive plate 42a, an extension plate 42c and a second conductive plate 42b, which are integrally formed, one end of the first conductive plate 42a is connected to one N-pole outgoing terminal 41-2b or L-pole outgoing terminal 41-1b as a first end of the first tab 42, in the figure, the first end of the first tab 42 is connected to the L-pole outgoing terminal 41-1b, the other end of the first conductive plate 42a is bent to a side away from the L-pole outgoing terminal 41-1b, so that the first conductive plate 42a is L-shaped as a whole, 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 bent upward, so that the extension plate 42c is L-shaped as a whole, a plate surface of the extension plate 42c is perpendicular to a plate surface of the first conductive plate 42a, first butt groove 421 has been seted up at the avris of extension board 42c, the first end and the first butt groove 421 elastic butt of second elastic component 32, by second elastic component 32 and the elastic butt of first butt groove 421, it possesses the wiring convenience, omit wire and advantage that occupation space is little, second conductive plate 42b is as the second end of first lug 42, the one end of second conductive plate 42b is connected with the middle part avris of extension board 42c, the other end of second conductive plate 42b passes the through wires hole of mutual-inductor 34, fig. 5, 6 extension board 42c, the one end face of second conductive plate 42b is close to one side that zero sequence transformer 34 kept away from second wiring mouth 121, first lug 42, second lug 43 pass the through wires hole of zero sequence transformer 34 side by side this moment, help realizing leading out the stable grafting with conducting piece.

As shown in fig. 5 and 6, the second tab 43 is integrally formed in an L-shaped plate structure, the second tab 43 is disposed between the connection terminal and the circuit board 35 along a 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 on a side of a first end of the second tab 43, a second end of the third elastic member 33 abuts against the second abutting groove 431, the third elastic member 33 is preferably a torsion spring in fig. 5, in addition, the first end of the second tab 43 is connected to the N-pole outgoing terminal 41-2b through a conducting wire, preferably, a connection conducting plate is further connected between the conducting wire and the N-pole outgoing terminal 41-2b, and the second end of the second tab 43 sequentially passes through the second threading hole of the zero sequence transformer 34 and a second connection port 121 of the second housing 12 to form the connection insertion piece 44.

In this embodiment, in the process of plug-in connection between the earth leakage protection module 3 and 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 conjunction with fig. 6-9, in which one terminal strip extends out of the second housing 12 to be connected to a lead-out conductive member, and the other lead-out conductive member extends out of the second housing 12 to be connected to another terminal strip, that is, a connection portion 451 leading out of the conductive member extends out of the first housing 11 through the first connection opening 111, and is connected to another terminal strip in the second housing 12.

The L pole and the N pole are assembled together in the same first housing 11 as the first embodiment, wherein the L pole and the N pole are arranged in parallel, wherein the N pole includes the same N pole inlet terminal 41-2a as the N pole, an N pole contact mechanism, and a lead-out conductive member connected to a stationary contact of the N pole, the L pole includes the same L pole inlet terminal 41-1a as the L pole, an arc extinguishing chamber, an L pole contact mechanism, a short-circuit protection mechanism, and an overload protection mechanism, and unlike the L pole, the first terminal 251 of the coil 25 is used as the lead-out conductive member of the L pole, preferably, the first terminal 251 of the coil 25 also extends outward in a direction perpendicular to a plane in which the arc extinguishing chamber is located, that is, the first terminal 251 extends outward in a thickness direction of the circuit breaker pole 2, the first terminal of the coil 25 protrudes from one first wiring port 111 of the first housing 11 and correspondingly protrudes into the second housing 12, a conductive region is formed at an end of the first terminal 251 of the coil 25, the conductive region may be used as a conductive region 451 of the plug portion 3, and the conductive region is formed by stripping the first wiring portion 451 of the plug-in the first wiring section 11, and then the conductive region is formed by the plug-in which the first housing 11.

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

As shown in fig. 8, the first tab 42 includes a first conductive plate 42a and a second conductive plate 42b which are integrally formed, one end of the first conductive plate 42a is connected to one terminal (L-pole outgoing terminal 41-1 b) as a first end of the first tab 42, the other end of the first conductive plate 42a is bent to a side far from the L-pole outgoing terminal 41-1b, the first conductive plate 42a is integrally L-shaped in the drawing, one end of the second conductive plate 42b is connected to a side of the first conductive plate 42a, the second conductive plate 42b extends in a direction far from the first conductive plate 42a and is close to a threading hole of the zero sequence transformer 34, the first tab 42 does not pass through the threading hole of the zero sequence transformer 34, which is beneficial to shortening the length of the first tab 42 and reducing a space occupied by the first tab 42, a plate face of the second conductive plate 42b in fig. 8 is disposed along a side of the attached zero sequence transformer 34 facing away from the second wiring port 121, the second conductive plate 42b is used as the second end of the first tab 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 opened at the edge of the second conductive plate 42b, preferably, the first abutting groove 421 is located at the lower side 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 region of the first terminal 251 is in abutting fit with the first abutting groove 421, so that the L-phase main circuit between the leakage protection module 3 and the L-pole is connected, the first terminal 251 can be regarded as a plug part 451 extending into the second housing 12, the conductive region of the second elastic element 32 and the first terminal 251 is in abutting fit with the first abutting groove 421 by the conductive region, the novel wire connector has the advantages of convenience in wiring, omission of wires and small occupied space.

As a third embodiment, when both the two connection tabs penetrate through the second housing 12, the two connection tabs sequentially penetrate through the second connection port 121 and the first connection port 111 and extend into the first housing 11, that is, the two connection tabs respectively penetrate through the first threading hole and the second threading hole of the zero sequence transformer 34 and then are respectively in inserting fit with the two leading-out conductive members, preferably, in this embodiment, the inserting portion 451 is disposed on the two connection tabs, the inserting piece 44 is disposed at one end of the leading-out conductive member, the inserting portion 451 may select the same slot as the above embodiment, and the contact portion 451 includes two first contact tabs and two second contact tabs disposed at intervals, of course, the structures of the inserting portion 451 and the inserting piece 44 are concave-convex structures that are matched with each other, and the specific structures are not limited to the above-described structures.

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 of the N poles may be assembled together in a first housing 11 adjacent to the earth leakage protection module 3, and at this time, the earth leakage protection module 3, the L poles and the N poles adopt the connection mode of the three embodiments; or, three L poles and one N pole are respectively assembled in the four first shells 11, one of the leading-out conductive members may pass through the adjacent first shells 11, so that the two leading-out conductive members finally extend side by side to the middle part of the same side wall of the same first shell 11, preferably, the leading-out conductive members and the terminal pieces correspond to the threading holes of the zero sequence transformer 34, and the 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", etc. indicate the directions or positional relationships based on the directions or positional relationships shown in the drawings or the directions or positional relationships that are usually placed when used, and are only for convenience of description, but do not indicate that the device or element to be referred to must have a specific direction, and therefore, should not be construed as limiting the present invention. Moreover, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating relative importance.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims (11)

1. The utility model provides a leakage protection module, includes second casing (12) be equipped with electric leakage detection circuit and by electric leakage detection circuit driven electric leakage tripping device in second casing (12), electric leakage detection circuit includes two binding post and zero sequence transformer (34), its characterized in that: the electric leakage detection circuit further comprises at least one lug plate, one end of the at least one lug plate is connected with the wiring terminal, the other end of the at least one lug plate penetrates through a threading hole of the zero sequence transformer (34) to form a plug-in piece (44), and the plug-in piece (44) and a second wiring port (121) of the side wall of the second shell (12) are arranged oppositely.

2. A residual current protection module as claimed in claim 1, characterized in that: the second wiring port (121) is located on the side wall of the second shell (12) and is opposite to the threading hole of the zero sequence transformer (34).

3. A residual current protection module according to claim 1, characterized in that: the electric leakage detection circuit comprises two lugs, one ends of the two lugs are respectively connected with the two wiring terminals, and the other ends of the two lugs penetrate through the threading holes of the zero sequence transformer (34) to form two side-by-side inserting lugs (44).

4. A residual current protection module according to claim 3, characterized in that: an electric isolation plate (345) is arranged in the threading hole of the zero sequence transformer (34), the threading hole is divided into a first threading hole and a second threading hole by the electric isolation plate (345), and two lugs respectively penetrate through the first threading hole and the second threading hole.

5. A residual current protection module according to claim 1, characterized in that: the two connecting terminals are respectively an L-pole outlet terminal (41-1 b) and an N-pole outlet terminal (41-2 b),

the lug plate connected with the L-pole outgoing line terminal (41-1 b) is a first lug plate (42), the first lug plate (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 lug plate (42) passes through the threading hole of the zero sequence transformer (34),

the lug plate connected to the N-pole outgoing line terminal (41-2 b) is a second lug plate (43), and the second lug plate (43) penetrates through a threading hole of the zero sequence transformer (34).

6. A residual current protection module according to claim 5, characterized in that: the first lug (42) penetrates through a threading hole of the zero sequence transformer (34), the first lug (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 the first end of the first lug plate (42) to be connected with the L-pole outlet terminal (41-1 b), the other end of the first conductive plate (42 a) is bent to the side departing from the L-pole outlet terminal (41-1 b),

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

7. A residual current protection module according to claim 6, characterized in that: a first abutting groove (421) is arranged at the side of the extension plate (42 c), a leakage test circuit is also assembled in the second shell (12),

the electric leakage test circuit comprises a test 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 break point of the electric leakage test circuit;

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

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

8. The earth leakage protection module according to claim 5, wherein the first lug (42) does not pass through a threading hole of the zero sequence transformer (34), the first lug (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 the first end of the first lug plate (42) and is connected with the L-pole outgoing terminal (41-1 b), the other end of the first conductive plate (42 a) is bent to one side far away from the L-pole outgoing terminal (41-1 b),

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

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

10. A residual current protection module according to claim 5, characterized in that: the second lug plate (43) is integrally of a plate-shaped structure, the second lug plate (43) is electrically connected with the N-pole outgoing line terminal (41-2 b), and the second end of the second lug plate (43) penetrates through a threading hole of the zero sequence transformer (34) to form a connecting and inserting piece (44).

11. A residual current protection module according to claim 10, characterized in that: a second abutting groove (431) is arranged at the side of the first end of the second lug plate (43),

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

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

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