CN214378311U

CN214378311U - Main loop structure of residual current circuit breaker and residual current circuit breaker

Info

Publication number: CN214378311U
Application number: CN202120869315.5U
Authority: CN
Inventors: 薛炜梁; 李超
Original assignee: Delixi Electric Co Ltd
Current assignee: Delixi Electric Co Ltd
Priority date: 2021-04-25
Filing date: 2021-04-25
Publication date: 2021-10-08
Anticipated expiration: 2031-04-25

Abstract

The utility model relates to the technical field of circuit breakers, in particular to a main loop structure of an electric leakage circuit breaker and the electric leakage circuit breaker, wherein the main loop structure comprises a phase line loop and a neutral line loop; one end of the phase line is welded with the electromagnetic trip coil, and the other end of the phase line is clamped and welded with a clamping structure arranged on the phase line wiring board to form a phase line loop; one end of the neutral wire is welded with the neutral wire wiring board, and the other end of the neutral wire is welded with the fixed contact to form a neutral wire loop. The phase line loop and the neutral line loop are arranged in the same shell, so that the lengths of the phase line and the neutral line are greatly reduced, and the problem that the conductor is too long due to the independent arrangement of the existing miniature circuit breaker and the electric leakage module is solved; meanwhile, the phase line and the phase line wiring board, the phase line and the electromagnetic trip coil, the neutral line and the neutral line wiring board, and the neutral line and the static contact are welded and fixed, the structure is simpler, the manufacture is easy, in addition, the phase line and the phase line wiring board are clamped and welded and fixed through a clamping structure, and the contact is firmer.

Description

Main loop structure of residual current circuit breaker and residual current circuit breaker

Technical Field

The utility model relates to a circuit breaker technical field especially relates to a main loop structure and electric leakage circuit breaker of electric leakage circuit breaker.

Background

An earth leakage circuit breaker, also called Residual Current Device (RCD), is an air circuit breaker with earth leakage protection function. The protection device is used for detecting the magnitude of phase line-to-earth leakage or electric shock current generated in a protected power grid to serve as a protection electric appliance which sends a tripping signal and completes a tripping task. It is currently used primarily to provide protection in the event of a leakage fault in the equipment. And also has overload and short-circuit protection functions.

The existing leakage circuit breaker with phase lines and neutral lines is mostly formed by assembling a miniature circuit breaker and a leakage module, the miniature circuit breaker and the leakage module are two independent elements, wherein the miniature circuit breaker is used for connecting and disconnecting circuits, and the leakage module is used for monitoring leakage current and sending a leakage tripping instruction. And the leads of the phase line inlet end and the neutral line inlet end of the electric leakage module are respectively connected to the wiring terminals of the outlet end of the miniature circuit breaker, and then the phase line inlet end and the neutral line inlet end are fixed through screws or rivets to form two main loops of a phase line loop and a neutral line loop. The main circuit structure of the leakage circuit breaker with the structure is complex, and the electric circuit is long.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the binding post that the inlet wire end wire of the electric leakage module of the electric leakage circuit breaker of phase line and neutral conductor among the prior art is connected to miniature circuit breaker's leading-out terminal, then will both fix through screw or rivet, lead to the problem that the structure is complicated, and the main loop structure of the electric leakage circuit breaker who provides a simple structure, contact are reliable and have the electric leakage circuit breaker of this main loop structure.

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

an object of the utility model is to provide a main loop structure of electric leakage circuit breaker, electric leakage circuit breaker includes a casing, locate zero sequence current transformer and electromagnetism trip coil, static contact in the casing and wear to locate phase line and neutral conductor in the zero sequence current transformer, main loop structure includes a phase line return circuit and a neutral conductor return circuit all the way;

one end of the phase line is welded with the electromagnetic trip coil, and the other end of the phase line is clamped and welded with a clamping structure arranged on a phase line wiring board to form a phase line loop;

one end of the neutral wire is welded with the neutral wire wiring board, and the other end of the neutral wire is welded with the fixed contact to form a neutral wire loop.

Optionally, the main loop structure of electric leakage circuit breaker, the joint structure is for seting up the phase line wiring board with one of the terminal draw-in groove that the phase line meets.

Optionally, the major loop structure of electric leakage circuit breaker, the draw-in groove for set up in the phase line wiring board with the sunken open slot in the outside-in of the one end that the phase line meets, the phase line is suitable for the joint to be in the open slot and with the inner wall of open slot welds firmly mutually.

Optionally, residual-current circuit breaker's major loop structure, the draw-in groove including set up in phase line wiring board with the sunken open slot of the outside-in of the one end that the phase line meets and by one of them inside wall of the notch of open slot extends to another inside wall direction and reserves gapped boss with another inside wall and encloses jointly and close and form, the phase line is suitable for the butt and is being equipped with the lateral wall of boss and weld admittedly on the inside wall of boss.

Optionally, the main loop structure of residual-current circuit breaker, the phase line terminal block includes:

the first transverse part is inserted into the wiring frame of the wiring terminal;

a vertical portion having one end vertically connected to one end of the first lateral portion;

the one end of the second transverse part is connected with the other end of the vertical part, the second transverse part is perpendicular to the first transverse part, and the clamping structure is arranged at one end, far away from the vertical part, of the second transverse part.

Optionally, the main circuit structure of the residual current circuit breaker, the first transverse portion, the vertical portion and the second transverse portion are integrally formed by bending.

Optionally, in the main circuit structure of the residual current circuit breaker, a first installation cavity for installing the zero sequence current transformer, the phase line, the neutral line, the electromagnetic trip coil and the static contact, and a second installation cavity for installing the wiring terminal are provided in the housing;

the first installation cavity comprises a phase line installation space and a neutral line installation space which are separated from each other;

the electromagnetic trip coil is arranged in a phase line installation space, one end of the phase line wiring board, which is connected with the phase line, penetrates into the neutral line installation space through the phase line installation space, is clamped with the phase line and is welded and fixed, and the electromagnetic trip coil penetrates into the neutral line installation space through the phase line installation space and is welded and fixed with the phase line;

the zero sequence current transformer and the static contact are both arranged in the neutral line installation space, and the neutral line wiring board and the static contact are distributed on two sides of the zero sequence current transformer.

Optionally, the major loop structure of electric leakage circuit breaker, be equipped with a baffle in the first installation cavity, the baffle will the casing is separated into phase line installation space and neutral conductor installation space, seted up the confession on the baffle phase line wiring board and electromagnetic trip coil penetrate respectively the hole of dodging in the neutral conductor installation space.

Another object of the present invention is to provide a residual current circuit breaker, including any of the above main circuit structures.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model discloses a main loop structure of electric leakage circuit breaker, through setting up phase line return circuit and neutral line return circuit in same casing, make the length of phase line and neutral line obtain reducing greatly, solved the problem that miniature circuit breaker and electric leakage module independent setting lead to the wire overlength among the prior art; meanwhile, the phase line and the phase line wiring board, the phase line and the electromagnetic trip coil, the neutral line and the neutral line wiring board, and the neutral line and the static contact are welded and fixed, the structure is simpler, the manufacture is easy, in addition, the phase line and the phase line wiring board are clamped and welded and fixed through a clamping structure, and the contact is firmer.

2. The utility model discloses a main loop structure of residual current circuit breaker, joint structure include the open slot and set up the boss at the notch position of open slot, through the setting of boss, can prevent that the phase line from following roll-off in the open slot, the subsequent welded fastening of being convenient for.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of the residual current circuit breaker of the present invention;

fig. 2 is a schematic structural view of a neutral line installation space of a case of the residual current circuit breaker of the present invention;

fig. 3 is a schematic structural view of a phase line installation space of a case of the residual-current circuit breaker of the present invention;

fig. 4 is a schematic structural view of another angle of the case of the residual current circuit breaker of the present invention;

fig. 5 is a schematic structural view of the phase line terminal block of the residual-current circuit breaker of the present invention.

Description of reference numerals:

1. a housing; 11. a partition plate; 12. a phase line installation space; 13. a neutral line installation space; 14. a neutral wire terminal mounting cavity; 15. a phase line wiring terminal mounting cavity; 2. a zero sequence current transformer; 3. an electromagnetic trip coil; 4. a phase line; 5. a neutral line; 6. a neutral wiring board; 7. a phase wire terminal block; 71. a first lateral portion; 72. a vertical portion; 73. a second transverse portion; 74. an open slot; 75. a boss; 8. and (7) carrying out static contact.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

As shown in fig. 1 to 2, the main circuit structure of the residual current circuit breaker includes a casing 1, and a zero sequence current transformer 2, an electromagnetic trip coil 3, a stationary contact 8, and a phase line 4 and a neutral line 5 penetrating through the zero sequence current transformer 2 are disposed in the casing 1. The casing 1 is provided with a first installation cavity for installing a zero sequence current transformer 2, a phase line 4, a neutral line 5, an electromagnetic trip coil 3 and a static contact 8 and a second installation cavity for installing a wiring terminal, wherein the wiring terminal comprises the phase line wiring terminal and the neutral line wiring terminal, and the corresponding second installation cavity also comprises a phase line wiring terminal installation cavity 15 and a neutral line wiring terminal installation cavity 14. One end of the phase line 4 is welded with the electromagnetic trip coil 3, and the other end is clamped and welded with a clamping structure arranged on the phase line wiring board 7 to form a phase line 4 loop. One end of the neutral wire 5 is welded to the neutral wire terminal plate 6, and the other end is welded to the stationary contact 8 to form a neutral wire 5 circuit. That is to say, the main circuit of the residual current circuit breaker comprises a phase line 4 circuit and a neutral line 5 circuit. Electromagnetic trip coil 3 is used for detecting leakage current and sends the electric leakage tripping command, two way return circuits are in same casing 1, the length of phase line 4 and neutral conductor 5 is reduced greatly, phase line 4 and neutral conductor 5 adopt welded fastening and pass through joint structure joint and welded fastening between phase line 4 and the binding post simultaneously, compare the current mode that adopts screw or fix with rivet, the structure is simpler, miniature circuit breaker and electric leakage module independent design among the prior art have been solved, lead to the inlet wire end of electric leakage module to be connected to miniature circuit breaker's outlet terminal binding post's wire overlength problem.

As for the snap-in structure, the snap-in structure is a snap-in groove opened on an end of the phase wiring board 7 to which the phase wires 4 are connected. Specifically, as shown in fig. 5, the card slot includes an open slot 74 that is disposed at an end of the phase wire connection board 7 connected to the phase wire 4 and is recessed from outside to inside, and a boss 75 that is formed by extending one of inner side walls of a notch of the open slot 74 to the other inner side wall direction and has a gap with the other inner side wall, and the phase wire 4 is adapted to abut against the inner side wall provided with the boss 75 and the inner wall of the boss 75 and is welded. The boss 75 can play the limiting effect to the tip of phase line 4, prevents roll-off when 4 joints of phase line are in the draw-in groove, makes things convenient for subsequent welding operation. As an alternative embodiment, the slot is an open slot 74 that is directly disposed at the end of the phase wire connection board 7 connected to the phase wire 4 and is recessed from the outside to the inside, that is, there is no need to dispose a boss 75 at the notch position of the open slot 74, and when connecting, the phase wire 4 is directly clamped in the open slot 74 and welded to the inner wall of the open slot 74.

As shown in fig. 5, the phase wiring block 7 includes a first lateral portion 71, a vertical portion 72, and a second lateral portion 73. The first and the

vertical portions

71, 72 are substantially L-shaped, and the vertical portion 72 and the second horizontal portion 73 are L-shaped, i.e. the second horizontal portion 73 is perpendicular to the first horizontal portion 71. More specifically, first horizontal portion 71 is inserted and is located phase line binding post's wire frame, and vertical portion 72 is connected and is located phase line binding post's wire frame with the one end of first horizontal portion 71, and the one end of second horizontal portion 73 also is kept away from the one end of welding with phase line 4 and is connected with vertical portion 72, and the draw-in groove structure is seted up in the one end of keeping away from with vertical portion 72 and being connected of second horizontal portion 73. Preferably, the first transverse portion 71, the vertical portion 72 and the second transverse portion 73 are integrally formed by bending, so as to facilitate the processing. That is, one end of the first horizontal portion 71 is vertically bent to form a vertical portion 72, and one end of the vertical portion 72 is horizontally and vertically bent to form a second horizontal portion 73. As an alternative embodiment, the first transverse portion 71, the vertical portion 72 and the second transverse portion 73 may be designed as separate bodies, and the first transverse portion 71, the vertical portion 72 and the second transverse portion 73 may be connected by welding.

As shown in fig. 4, the housing 1 is provided with a partition 11 in the middle of the housing 1 to separate a first installation cavity in the housing 1 into a phase installation space 12 and a neutral installation space 13. The electromagnetic trip coil 3 is disposed in the phase line installation space 12, the zero sequence current transformer 2 and the static contact 8, and the phase line 4 and the neutral line 5 are disposed in the neutral line installation space 13, and the neutral wiring board 6 and the static contact 8 are respectively disposed on two sides of the zero sequence current transformer 2, that is, on the left and right sides as shown in fig. 2. One end of the electromagnetic trip coil 3 welded to the phase line 4 penetrates into the neutral wire installation space 13 through an avoiding hole (for convenience of distinction and description, herein described as a first avoiding hole) formed in the partition plate 11 and is welded to the phase line 4. The end of the phase wire terminal block 7, which is clamped and welded to the phase wire 4, is also inserted into the neutral wire installation space 13 through an avoiding hole (herein described as a second avoiding hole for convenience of distinction and description) formed in the partition 11, and is clamped and welded to the phase wire 4. As an alternative embodiment, the partition 11 may not be disposed in the housing 1, and only the zero-sequence current transformer 2 and the electromagnetic trip coil 3 need to be disposed in the first installation cavity of the housing 1 at a proper distance, and those skilled in the art may set the distance according to the related design specifications, which will not be described and limited in detail.

The neutral wire terminal plate 6 is substantially L-shaped, and the specific structure thereof will not be described or limited in detail.

Resistance welding is adopted for welding the phase line 4 and the electromagnetic release in the embodiment. The phase line 4 and the phase line terminal block 7 are soldered by soldering. Resistance welding is used for welding the neutral wire 5 and the neutral wire terminal plate 6.

Example 2

An electrical leakage breaker of the present embodiment, referring to fig. 1 to 5, includes the main circuit structure of embodiment 1. Due to the adoption of the main loop structure, the main loop structure at least has the beneficial effects of simple structure, easy manufacture, clamping and welding between the phase line 4 and the phase line wiring board 7, and more reliable contact.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A main loop structure of a residual current circuit breaker is characterized by comprising a shell (1), a zero sequence current transformer (2) and an electromagnetic trip coil (3) which are arranged in the shell (1), a static contact (8), a phase line (4) and a neutral line (5) which are arranged in the zero sequence current transformer (2) in a penetrating mode, wherein the main loop structure comprises a phase line (4) loop and a neutral line (5) loop;

one end of the phase line (4) is welded with the electromagnetic trip coil (3), and the other end of the phase line is clamped and welded with a clamping structure arranged on a phase line wiring board (7) to form a phase line (4) loop;

one end of the neutral wire (5) is welded with the neutral wire wiring board (6), and the other end of the neutral wire (5) is welded with the static contact (8) to form a neutral wire (5) loop.

2. A main circuit structure of residual-current circuit breaker according to claim 1, characterized in that said clamping structure is a clamping groove opened at one end of said phase line terminal block (7) connected to said phase line (4).

3. The main circuit structure of residual current circuit breaker according to claim 2, characterized in that said slot is an open slot (74) recessed from outside to inside provided at the end of said phase line wiring board (7) connected to said phase line (4), said phase line (4) is adapted to be clamped in said open slot (74) and welded to the inner wall of said open slot (74).

4. The main circuit structure of residual-current circuit breaker according to claim 2, characterized in that, the slot comprises an outside-in recessed open slot (74) disposed at one end of the phase line wiring board (7) connected to the phase line (4) and a boss (75) which is extended to another inner side wall direction and has a gap reserved with another inner side wall to enclose together, wherein the slot of the open slot (74) is adapted to abut against the inner side wall of the boss (75) and the inner wall of the boss (75) and is welded firmly.

5. A main circuit structure of residual-current circuit breaker, as claimed in claim 1, characterized in that said phase wiring board (7) comprises:

a first lateral portion (71) inserted into a wire connection frame of the wire connection terminal;

a vertical portion (72) having one end vertically connected to one end of the first lateral portion (71);

the one end of second horizontal portion (73) is connected the other end of vertical portion (72), just second horizontal portion (73) with first horizontal portion (71) is mutually perpendicular, the joint structure sets up keeping away from of second horizontal portion (73) the one end of vertical portion (72).

6. A main circuit structure of residual-current circuit breaker, according to claim 5, characterized in that said first transversal portion (71), said vertical portion (72) and said second transversal portion (73) are integrally bent.

7. The main circuit structure of the residual current circuit breaker according to claim 1, wherein the housing (1) has a first mounting cavity for mounting the zero sequence current transformer (2), the phase line (4), the neutral line (5), the electromagnetic trip coil (3) and the static contact (8), and a second mounting cavity for mounting the connection terminal;

the first installation cavity comprises a phase line installation space (12) and a neutral line installation space (13) which are separated from each other;

the electromagnetic trip coil (3) is arranged in a phase line installation space (12), one end, connected with the phase line (4), of the phase line wiring board (7) penetrates into the neutral line installation space (13) through the phase line installation space (12) and is clamped and welded with the phase line (4), and the electromagnetic trip coil (3) penetrates into the neutral line installation space (13) through the phase line installation space (12) and is welded and fixed with the phase line (4);

the zero sequence current transformer (2) and the static contact (8) are arranged in the neutral line installation space (13), and the neutral line wiring board (6) and the static contact (8) are distributed on two sides of the zero sequence current transformer (2).

8. The main circuit structure of the residual current circuit breaker according to claim 7, wherein a partition plate (11) is disposed in the first mounting cavity, the partition plate (11) separates the housing (1) into the phase line mounting space (12) and the neutral line mounting space (13), and a avoiding hole is disposed on the partition plate (11) for the phase line wiring board (7) and the electromagnetic trip coil (3) to penetrate into the neutral line mounting space (13) respectively.

9. An earth leakage circuit breaker, characterized in that it comprises a main circuit structure according to any one of claims 1-8.