CN113643941A

CN113643941A - Leakage protector

Info

Publication number: CN113643941A
Application number: CN202111105938.6A
Authority: CN
Inventors: 渠晓敏; 刘凯峰; 王松涛; 洪景鹏; 刘晓芝
Original assignee: Zhejiang Huakai Electric Co ltd
Current assignee: Zhejiang Huakai Electric Co ltd
Priority date: 2021-09-22
Filing date: 2021-09-22
Publication date: 2021-11-12

Abstract

The application relates to a leakage protector, including: the shell is provided with a first lead through hole and a second lead through hole; the circuit board, the tripping mechanism and the operating mechanism are arranged in the shell; the zero sequence transformer is arranged on the circuit board; the first incoming line terminal is arranged on one side in the shell; the first outgoing line terminal is arranged on the other side in the shell; the operating mechanism is connected with the first incoming line terminal; the first lead is connected with the tripping mechanism and penetrates through the zero sequence transformer, one end of the first lead is connected with the first wire outlet terminal, and the second lead penetrates through the first lead through hole or the second lead through hole and penetrates through the zero sequence transformer; the operating mechanism has a first state and a second state, and when the operating mechanism is in the first state, the operating mechanism is connected with the tripping mechanism to enable the other end of the first lead to be communicated with the first incoming line terminal; when the operating mechanism is in the second state, the operating mechanism and the tripping mechanism are disconnected, so that the other end of the first lead is disconnected with the first incoming terminal. This application designs different wiring modes, and factor of safety is high.

Description

Leakage protector

Technical Field

The application relates to the technical field of low-voltage electricity, in particular to a leakage protector.

Background

The existing two-pole leakage circuit breaker is usually 72mm in width, and two poles are opened by 36mm in space and matched with a leakage module by 36 mm. The zero sequence transformer and the circuit board are separately designed, the installation process is complex, and the zero sequence transformer and the circuit board are easy to damage.

The existing two-pole residual current circuit breaker also has integral residual current within the width range of 18mm, but the current wiring capacity is only 10mm²And 25A or 32A can only be achieved, the high-current connector cannot be applied to large-current specification products, and meanwhile, because the wiring terminal is designed side by side at the width of 18mm, the electrical clearance and the creepage distance are small, the power utilization safety coefficient is low, and the short-circuit capacity is low due to the space problem.

In addition, the current level of the circuit breaker needs to be greater than the current of the indoor distribution box after the ammeter box is measured, and most ammeter boxes are limited by space and cannot be provided with large-size leakage protectors.

Disclosure of Invention

The utility model aims at providing a earth-leakage protector, through electric clearance and the creepage distance that increases the N utmost point and the L utmost point, optimized the product mode of connection, improve power consumption factor of safety, realize heavy current protection in conventional 1 utmost point space, with circuit board and zero sequence transformer integrated design simultaneously, make inner structure compacter, not fragile, the equipment is simpler.

The embodiment of the application is realized as follows:

the application provides a leakage protector, includes: the circuit breaker comprises a shell, a tripping mechanism, an operating mechanism, a circuit board, a zero sequence transformer, a first wire inlet terminal, a first wire outlet terminal, a first lead and a second lead; the shell is provided with a first lead through hole and a second lead through hole; the circuit board is arranged in the shell; the zero sequence transformer is arranged on the circuit board; the tripping mechanism is arranged in the shell and positioned on one side of the circuit board; the first incoming line terminal is arranged on one side in the shell and used for L-pole incoming line; the first outgoing line terminal is arranged on the other side in the shell and used for L-pole outgoing line; the operating mechanism is arranged in the shell and is connected with the first incoming line terminal; one end of the first lead is connected with the first outgoing line terminal, penetrates through the zero sequence transformer and is connected with the tripping mechanism, and the second lead penetrates through the first lead through hole or the second lead through hole and penetrates through the zero sequence transformer and is used for leading in the N pole and leading out the N pole; the operating mechanism has a first state and a second state, and when the operating mechanism is in the first state, the operating mechanism is connected with the tripping mechanism to enable the other end of the first lead to be communicated with the first incoming line terminal; when the operating mechanism is in the second state, the operating mechanism and the tripping mechanism are disconnected, so that the other end of the first lead is disconnected with the first incoming terminal.

In an embodiment, the shell is further provided with a third lead through hole, and an N-pole incoming line end of the second lead passes through the first lead through hole, extends into the shell and passes through the zero sequence transformer;

the N pole outlet end of the second lead penetrates through the third lead through hole and extends out of the shell.

In one embodiment, the N-pole incoming line end of the second wire penetrates through the first wire through hole, extends into the shell, and penetrates through the zero sequence transformer;

the N pole outlet end of the second lead penetrates through the third lead through hole and extends out of the shell;

and the N-pole wire inlet end and the N-pole wire outlet end of the second wire are both provided with wire clamps.

the N pole outlet end of the second lead penetrates through the second lead through hole and extends out of the shell;

and the N-pole wire inlet end of the second wire is provided with a wire clamp.

wherein, the N pole leading-out terminal of the second lead is provided with a lead clamp.

In one embodiment, the leakage protector further includes:

the second connecting terminal is arranged on one side in the shell and is positioned on one side of the first wire outlet terminal, and the first wire outlet terminal and the second connecting terminal are arranged in a staggered manner;

the N-pole wire inlet end of the second wire penetrates through the first wire through hole, extends into the shell and penetrates through the zero sequence transformer;

and the N-pole wire outlet end of the second lead is connected with the second wiring terminal.

In one embodiment, the N-pole wire inlet end of the second wire is provided with a wire clamp.

In one embodiment, the trip mechanism includes: the tripper comprises a tripper body, a bracket, a coil, an ejector rod structure and a static contact;

one end of the coil is connected with the first lead, and the coil is wound on the bracket; the ejector rod structure is arranged in the bracket; the static contact is arranged on the bracket.

In one embodiment, the operating mechanism includes: the mechanism comprises a mechanism action component, a driving piece and a handle; wherein the content of the first and second substances,

a moving contact is arranged on the mechanism action component; the driving piece is connected with the mechanism action component; the handle is connected with the driving piece; the moving contact and the static contact are electrically conducted through the driving piece and the handle.

In one embodiment, the leakage protector further includes: and the arc extinguishing mechanism is arranged in the shell.

Compared with the prior art, the beneficial effect of this application is: this application is through designing different wiring modes, increases the electric clearance and the creepage distance of the N utmost point and the L utmost point, improves power consumption factor of safety, makes earth-leakage protector product compactness more. Meanwhile, the circuit board and the zero sequence transformer are integrally designed, so that the internal structure is more compact, the circuit board and the zero sequence transformer are not easy to damage, and the assembly is simpler. The electric leakage protector is highly integrated, and provides electric leakage protection, overload protection, short-circuit protection and isolation functions. High rated current can be realized, and the high-voltage power supply has high current carrying capacity and wiring capacity.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 shows a first wiring manner of a leakage protector according to an embodiment of the present application;

fig. 2 is a schematic diagram of a connection structure of a circuit board and a zero sequence transformer according to an embodiment of the present application;

fig. 3 shows a second wiring manner of the earth leakage protector according to an embodiment of the present application;

fig. 4 shows a third wiring manner of the earth leakage protector according to an embodiment of the present application;

fig. 5 shows a fourth connection mode of the earth leakage protector according to an embodiment of the present application;

fig. 6 shows a fifth connection mode of the earth leakage protector according to an embodiment of the present application;

fig. 7 shows a sixth wiring manner of the earth leakage protector according to an embodiment of the present application.

Icon:

1-a leakage protector; 11-a housing; 111-first wire perforation; 112-second wire perforation; 113-third wire perforation; 12-a circuit board; 13-a zero sequence transformer; 14-a trip mechanism; 141-a release; 142-a scaffold; 143-coils; 144-a top bar structure; 145-static contact; 15-an operating mechanism; 151-mechanism action assembly; 1511-moving contact; 152-a drive member; 153-a handle; 16-an arc extinguishing mechanism; 100-a first incoming terminal; 200-a first outlet terminal; 300-a first wire; 400-a second conductive line; 410-N pole incoming line end; 420-N pole outlet terminal; 500-a wire clamp; 600-second connection terminal.

Detailed Description

The terms "first," "second," "third," and the like are used for descriptive purposes only and not for purposes of indicating or implying relative importance, and do not denote any order or order.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it should be noted that the terms "inside", "outside", "left", "right", "upper", "lower", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally arranged when products of the application are used, and are used only for convenience in describing the application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the application.

In the description of the present application, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements.

The technical solution of the present application will be clearly and completely described below with reference to the accompanying drawings.

Referring to fig. 1 and fig. 2, a leakage protector 1 includes: the circuit breaker comprises a shell 11, a circuit board 12, a zero sequence transformer 13, a tripping mechanism 14, an operating mechanism 15, an arc extinguishing mechanism 16, a first incoming terminal 100, a first outgoing terminal 200, a first lead 300 and a second lead 400; the housing 11 is provided with a first wire through hole 111 and a second wire through hole 112, and the first wire through hole 111 and the second wire through hole 112 may be disposed on the same sidewall of the housing 11. The first incoming terminal 100 is arranged at one side in the shell 11 and used for L-pole incoming; the first outgoing line terminal 200 is disposed at the other side in the housing 11 for L-pole outgoing line. One end of the first wire 300 is electrically connected to the first outlet terminal 200, passes through the zero sequence transformer 13, and is connected to the trip mechanism 14. The second wire 400 is inserted into the first wire through hole 111 or the second wire through hole 112, and passes through the zero sequence transformer 13, for N-pole incoming wire and N-pole outgoing wire.

The circuit board is arranged in the casing 11 and is positioned at one side of the tripping mechanism 14 (please refer to fig. 1), and the zero sequence transformer 13 is arranged on the circuit board 12, so that the circuit board 12 and the zero sequence transformer 13 are integrally arranged, the installation process is simple, and the circuit board is not easy to damage. The leakage protection of the leakage protector 1 is realized by inducing leakage current through the zero sequence transformer 13 and unlocking the driving mechanism through the circuit board 12.

The earth leakage protector 1 further includes: and the arc extinguishing mechanism 16, the arc extinguishing mechanism 16 is arranged in the shell 11. The arc extinguishing mechanism 16 facilitates rapid extinguishing of the arc.

The trip mechanism 14 is disposed in the housing 11 and located on one side of the circuit board 12. Operating mechanism 15 is located inside housing 11 and connected to first wire terminal 100, and specifically, electrical connection between operating mechanism 15 and first wire terminal 100 can be achieved through a circuit.

Specifically, the trip mechanism 14 includes: the tripping device 141 comprises an iron core, one end of the coil 143 is electrically connected with the first conducting wire 300, the coil 143 is wound on the bracket 142, the push rod structure 144 is arranged in the bracket 142, the static contact 145 is arranged on the bracket 142, and the end of the coil 143 is welded with the static contact 145.

The operating mechanism 15 includes: a mechanism action assembly 151, a driving member 152 and a handle 153; wherein, the mechanism action component 151 is provided with a moving contact 1511, the moving contact 1511 is a part of the mechanism action component 151, and the driving component 152 is connected with the mechanism action component 151; the handle 153 is connected with the driving member 152; the movable contact 1511 and the fixed contact 145 are linked by the driving member 152 and the handle 153.

The operating mechanism 15 has a first state and a second state, and when the operating mechanism 15 is in the first state, the operating mechanism 15 and the trip mechanism 14 are electrically connected, so that the first wire 300 is electrically connected to the first wire inlet terminal 100. When operating mechanism 15 is in the second state, operating mechanism 15 and trip mechanism 14 are disengaged, disconnecting the other end of first conductor 300 from first inlet terminal 100.

In an operation process, when the power voltage is normal, the handle 153 is pulled, the handle 153 rotates to the right side, under the action of the driving element 152, the moving contact 1511 on the operating mechanism 15 and the static contact 145 on the tripping mechanism 14 are closed, so that two ends of the first conducting wire 300 connected with the coil 143 are respectively and electrically communicated with the first incoming wire terminal 100 and the first outgoing wire terminal 200, the electrical conduction is realized, at this time, when the tripping mechanism 14 has a first state, the operating mechanism 15 is matched to work, the current loop is switched on, current is generated according to the electromagnetic induction principle, and the earth leakage protector 1 is put into operation.

When electric leakage occurs, the electrical leakage signal is received by the electrical release 141, according to the electromagnetic induction principle, the push rod structure 144 in the electrical release 141 acts to push the mechanism action assembly 151 to act, a latch is arranged in the mechanism action assembly 151 to unlock the latch in the mechanism action assembly 151, the movable contact 1511 is separated from the fixed contact 145, the action of the mechanism action assembly 151 further drives the handle 153 to turn to the left, when the fixed contact 145 is disconnected from the movable contact 1511, one end of the first conducting wire 300 connected with the coil 143 is still connected with the first outgoing line terminal 200, but at the first incoming line terminal 100, due to the disconnection of the movable contact 1511 and the fixed contact 145, the circuit formed at the first incoming line terminal 100 of the first conducting wire 300 is disconnected, so that the whole circuit loop is disconnected, that when the operating mechanism 15 has the second state, the tripping mechanism 14 works to realize the disconnection of the current loop for power-off protection, the power supply circuit can be effectively protected.

Six different wiring modes in the earth-leakage protector 1 will be described in detail below. Referring to fig. 1, in an embodiment, from the direction shown in fig. 1, the first incoming terminal 100 may be disposed on the right side of the housing 11, and the first outgoing terminal 200 may be disposed on the left side of the housing 11.

As mentioned above, when the operating mechanism 15 is in the first state, the operating mechanism 15 is electrically connected to the trip mechanism 14, so that the first conducting wire 300 is electrically connected to the first incoming terminal 100, and the current loop is connected; when operating mechanism 15 is in the second state, operating mechanism 15 and tripping mechanism 14 are disconnected, so that the other end of first conductor 300 is disconnected from first incoming terminal 100, and the current loop is open.

The shell 11 is provided with a third wire through hole 113, an N-pole wire inlet end 410 of the second wire 400 passes through the first wire through hole 111 and extends into the shell 11 and passes through the zero sequence transformer 13, and an N-pole wire outlet end 420 of the second wire 400 passes through the third wire through hole 113 and extends out of the shell 11.

In this embodiment, the first wire 300 is used for the L-pole wire inlet end and adopts the wire connection mode of the first wire inlet terminal 100, the first wire 300 is used for the L-pole wire outlet end and adopts the wire connection mode of the first wire outlet terminal 200, and the N-pole wire inlet end 410 and the N-pole wire outlet end 420 of the second wire 400 both adopt the wire connection mode.

Fig. 3 shows a second wiring manner of the earth leakage protector 1 according to an embodiment of the present application. The positions of the first incoming terminal 100 and the first outgoing terminal 200 are not changed, and the operating mechanism 15 cooperates with the tripping mechanism 14 to make the current loop of the first conductor 300 on and off.

The N-pole wire inlet end 410 of the second wire 400 passes through the first wire through hole 111, extends into the housing 11, and passes through the zero sequence transformer 13, and the N-pole wire outlet end 420 of the second wire 400 passes through the third wire through hole 113, and extends out of the housing 11, wherein the N-pole wire inlet end 410 and the N-pole wire outlet end 420 of the second wire 400 are both provided with wire clamps 500. Copper bars may be connected to the wire clamp 500 instead of the second wires 400 by means of screws.

In this embodiment, the connection manner of the first conductive wire 300 is not changed, and the N-pole wire inlet end 410 and the N-pole wire outlet end 420 of the second conductive wire 400 are both connected by the wire connecting clip 500.

Fig. 4 shows a third wiring manner of the earth leakage protector 1 according to an embodiment of the present application. The positions of the first incoming terminal 100 and the first outgoing terminal 200 are not changed, and the operating mechanism 15 cooperates with the tripping mechanism 14 to make the current loop of the first conductor 300 on and off.

The N-pole wire inlet end 410 of the second wire 400 passes through the first wire through hole 111, extends into the housing 11, and passes through the zero sequence transformer 13, and the N-pole wire outlet end 420 of the second wire 400 passes through the second wire through hole 112, and extends out of the housing 11. The wire clamp 500 is disposed at the N-pole wire inlet end 410 of the second wire 400. Copper bars may be connected to the wire clamp 500 instead of the second wires 400 by means of screws.

In this embodiment, the connection mode of the first conductive wire 300 is not changed, and the connection mode of the wire connecting clip 500 is adopted for the N-pole wire inlet end 410 of the second conductive wire 400.

Fig. 5 shows a fourth connection mode of the earth leakage protector 1 according to an embodiment of the present application. The positions of the first incoming terminal 100 and the first outgoing terminal 200 are not changed, and the operating mechanism 15 cooperates with the tripping mechanism 14 to make the current loop of the first conductor 300 on and off.

The N-pole wire inlet end 410 of the second wire 400 passes through the first wire through hole 111, extends into the housing 11, and passes through the zero sequence transformer 13, and the N-pole wire outlet end 420 of the second wire 400 passes through the second wire through hole 112, and extends out of the housing 11. The N-pole outlet 420 of the second conductive wire 400 is provided with a conductive wire clamp 500. Copper bars may be connected to the wire clamp 500 instead of the second wires 400 by means of screws.

In this embodiment, the connection manner of the first conductive wire 300 is not changed, and the connection manner of the wire clip 500 is adopted for the N-pole outlet end 420 of the second conductive wire 400.

In the four wiring modes, only the first incoming terminal 100 and the first outgoing terminal 200 are arranged in the housing 11 of the earth leakage protector 1, and are respectively used for L-pole incoming line and L-pole outgoing line, and the operating mechanism 15 cooperates with the tripping mechanism 14 to make the current loop of the first conducting wire 300 be switched on and off. The wire clamp 500 is arranged at the N-pole wire inlet end 410 or the N-pole wire outlet end 420 of the second wire 400 to form different wire connection modes, so that the N-pole wire inlet end 410 or the N-pole wire outlet end 420 is led out in a wire connecting terminal or a conductive clamp or a direct wire mode, different application place requirements can be met, and the wire connection capacity is improved. In addition, the four wiring modes can increase the electric gap and the creepage distance between the N pole and the L pole.

Fig. 6 shows a fifth connection mode of the earth leakage protector 1 according to an embodiment of the present application. The positions of the first incoming terminal 100 and the first outgoing terminal 200 are not changed, and the operating mechanism 15 cooperates with the tripping mechanism 14 to make the current loop of the first conductor 300 on and off.

A second connection terminal 600 is further disposed on one side of the housing 11, the second connection terminal 600 is disposed on one side of the first outlet terminal 200, and the first outlet terminal 200 and the second connection terminal 600 are alternately disposedSpecifically, the first wire outgoing terminal 200 and the second wire outgoing terminal 600 are arranged in tandem, that is, the first wire outgoing terminal 200 is arranged in front of the second wire outgoing terminal 600, so that the wire connection capacity can be increased to the maximum extent, and the maximum wire outgoing capacity can reach 35mm²。

The N-pole wire inlet end 410 of the second wire 400 passes through the first wire through hole 111, extends into the housing 11, and passes through the zero sequence transformer 13, when passing through the zero sequence transformer 13, the N-pole wire inlet end 410 of the second wire 400 passes around the lower portion of the end of the first wire 300 connected with the first wire outlet terminal 200, and after passing through the zero sequence transformer 13, the N-pole wire outlet end 420 of the second wire 400 is connected with the second wire connecting terminal 600.

In this embodiment, the wiring manner of the first wire 300 is not changed, the second wiring terminal 600 is added, and the second wiring terminal 600 and the first outlet terminal 200 are staggered back and forth, so that the wiring capability is increased to the maximum. The N-pole outlet 420 of the second conductive wire 400 is directly electrically connected to the second connection terminal 600.

Fig. 7 shows a sixth wiring manner of the earth leakage protector 1 according to an embodiment of the present application. The positions of the first incoming terminal 100 and the first outgoing terminal 200 are not changed, and the operating mechanism 15 cooperates with the tripping mechanism 14 to make the current loop of the first conductor 300 on and off.

The second connecting terminal 600 is disposed on one side of the first outlet terminal 200, and the first outlet terminal 200 and the second connecting terminal 600 are disposed in a staggered manner in tandem.

The N-pole incoming line end 410 of the second wire 400 passes through the first wire through hole 111, extends into the housing 11, and passes through the zero sequence transformer 13, and the N-pole incoming line end 410 of the second wire 400 is provided with a wire clamp 500. Copper bars may be connected to the wire clamp 500 instead of the second wires 400 by means of screws.

In this embodiment, the wiring manner of the first wire 300 is not changed, the second wiring terminal 600 is added, and the second wiring terminal 600 and the first outlet terminal 200 are staggered back and forth, so that the wiring capability is increased to the maximum. The N-pole wire outlet 420 of the second wire 400 is directly electrically connected to the second wire terminal 600, and the N-pole wire inlet 410 of the second wire 400 is provided with the wire clamp 500. Copper bars may be connected to the wire clamp 500 instead of the second wires 400 by means of screws.

In the two wiring modes, only the first incoming terminal 100 and the first outgoing terminal 200 are arranged in the shell 11 of the earth leakage protector 1 and are respectively used for L-pole incoming line and L-pole outgoing line, and the tripping mechanism 14 is matched with the operating mechanism 15 to switch on and off a circuit loop. The second wiring terminal 600 is further arranged in the shell 11, and the second wiring terminal 600 and the first outlet terminal 200 are arranged in a front-back staggered mode, so that the wiring capacity is increased to the maximum extent. Meanwhile, the N-pole wire inlet end of the second wire 400 is directly connected with the second wiring terminal 600, or the N-pole wire outlet end 420 of the second wire 400 is provided with the wire clamp 500, so that the N-pole wire inlet end 410 or the N-pole wire outlet end 420 is led out in a wiring terminal or a conductive clamp or a direct wire manner, the requirements of different application places can be met, and the wiring capacity is improved. In addition, the two wiring modes can increase the electric gap and the creepage distance between the N pole and the L pole.

In both embodiments shown in fig. 6 and fig. 7, the first outlet terminal 200 and the second outlet terminal 600 are staggered in tandem, which can improve the wiring capability, so that the wiring capability of the earth leakage protector 1 reaches 35mm²The maximum current of the housing can reach 80A, and the current exceeds 63A of a conventional household main distribution box, so that the leakage protector 1 is used for a meter box as a backup protection and cannot influence electrical equipment in a home.

The N-pole wire inlet end 410 and the N-pole wire outlet end 420 of the second wire 400 are arranged on one side of the housing 11, so that temperature rise can be reduced, and the circuit board 12, the zero sequence transformer 13 and the tripping mechanism 14 are integrally designed, so that the structure is compact, safe and reliable. And the large-current leakage protection is realized in the space of a conventional monopole product.

By adopting the wiring mode provided by the six embodiments, the leakage protector 1 is more compact, and the leakage protection of large current in the conventional 1-pole space can be realized. Secondly, the selectivity of different wiring modes can be provided for users; adopt different wiring modes can increase the electric clearance and the creepage distance of N utmost point and L utmost point, improve power consumption factor of safety. The electric leakage protector 1 is highly integrated, and provides electric leakage protection, overload protection, short-circuit protection and isolation functions. High rated current can be realized, and the high-voltage power supply has high current carrying capacity and wiring capacity.

It should be noted that the features of the embodiments in the present application may be combined with each other without conflict.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A earth-leakage protector, comprising:

the shell is provided with a first lead through hole and a second lead through hole;

the circuit board is arranged in the shell;

the zero sequence transformer is arranged on the circuit board;

the tripping mechanism is arranged in the shell and positioned on one side of the circuit board;

the first incoming line terminal is arranged on one side in the shell and used for L-pole incoming line;

the first wire outlet terminal is arranged on the other side in the shell and used for L-pole wire outlet;

the operating mechanism is arranged in the shell and is connected with the first incoming line terminal;

a first lead with one end connected to the first outlet terminal, penetrating through the zero sequence transformer and connected to the tripping mechanism, and

the second lead penetrates through the first lead through hole or the second lead through hole, penetrates through the zero sequence transformer and is used for leading in and leading out the N pole;

when the operating mechanism is in the first state, the operating mechanism is connected with the tripping mechanism, so that the other end of the first lead is communicated with the first incoming line terminal;

when the operating mechanism is in a second state, the operating mechanism and the tripping mechanism are disconnected, so that the other end of the first lead is disconnected with the first incoming terminal.

2. A leakage protector according to claim 1, wherein the housing is further provided with a third wire through hole;

an N-pole wire inlet end of the second lead penetrates through the first lead through hole, extends into the shell and penetrates through the zero sequence transformer;

and the N-pole wire outlet end of the second lead penetrates out of the third lead through hole and extends out of the shell.

3. The earth leakage protector according to claim 2, wherein the N-pole incoming line end of the second lead passes through the first lead through hole, extends into the casing, and passes through the zero sequence transformer;

an N-pole outlet end of the second lead penetrates through the third lead through hole and extends out of the shell;

and the N-pole wire inlet end and the N-pole wire outlet end of the second lead are both provided with lead clamps.

4. The earth leakage protector according to claim 1, wherein an N-pole incoming line end of the second lead passes through the first lead through hole, extends into the housing, and passes through the zero sequence transformer;

an N-pole outlet end of the second lead penetrates through the second lead through hole and extends out of the shell;

and the N-pole wire inlet end of the second wire is provided with a wire clamp.

5. The earth leakage protector according to claim 1, wherein an N-pole incoming line end of the second lead passes through the first lead through hole, extends into the housing, and passes through the zero sequence transformer;

and the N-pole leading-out end of the second lead is provided with a lead clamp.

6. A earth-leakage protector according to claim 1, further comprising:

the second wiring terminal is arranged on one side in the shell and is positioned on one side of the first wire outlet terminal, and the first wire outlet terminal and the second wiring terminal are arranged in a staggered mode;

7. A leakage protector according to claim 6, characterized in that the N-pole incoming line end of the second wire is provided with a wire clamp.

8. A earth-leakage protector according to claim 1, characterized in that the trip mechanism comprises:

a release;

one end of the coil is connected with the first lead, and the coil is wound on the bracket;

the ejector rod structure is arranged in the bracket; and

and the static contact is arranged on the bracket.

9. A earth-leakage protector according to claim 8, characterized in that the operating mechanism comprises:

the mechanism action component is provided with a moving contact;

the driving piece is connected with the mechanism action component; and

a handle connected with the driving member;

the moving contact and the static contact are electrically conducted through the driving piece and the handle.

10. A earth-leakage protector according to claim 1, further comprising:

and the arc extinguishing mechanism is arranged in the shell.