CN216624149U

CN216624149U - Residual current operated circuit breaker

Info

Publication number: CN216624149U
Application number: CN202122673340.9U
Authority: CN
Inventors: 潘超; 王以盾; 郭德鑫; 李俐
Original assignee: Zhejiang Chint Electrics Co Ltd
Current assignee: Zhejiang Chint Electrics Co Ltd
Priority date: 2021-11-03
Filing date: 2021-11-03
Publication date: 2022-05-27
Anticipated expiration: 2031-11-03

Abstract

A residual current operated circuit breaker comprises a multi-pole conductive system, a mutual inductor and an insulating cover shell which are arranged in a base, wherein the insulating cover shell comprises a first cover shell and a second cover shell which are matched in an inserting mode, the first cover shell comprises a first cover shell side plate, a first insulating structure is arranged on one side of the first cover shell side plate in a protruding mode, the first insulating structure is inserted into a through hole of the mutual inductor to separate penetrating connecting pieces of the conductive systems, the first insulating structure comprises a first cross plate and a first vertical plate which are cross-shaped, and the residual current operated circuit breaker further comprises an inner side arc-shaped baffle plate connected with the lower side edge of the first vertical plate; the second housing comprises a second housing side plate, an outer side arc-shaped baffle plate is arranged on one side of the second housing side plate in a protruding mode, a horizontal supporting plate is arranged above the outer side arc-shaped baffle plate, the second housing side plate can be assembled conveniently under the condition that the penetrating connecting piece of each pole conducting system is installed firstly, and the mutual inductor is protected while enough phase insulation performance is guaranteed.

Description

Residual current operated circuit breaker

Technical Field

The utility model belongs to the field of low-voltage electric appliances, and relates to a residual current operated circuit breaker.

Background

At present, each phase of conducting systems of a tripolar or quadrupole (with N phases) residual current operated circuit breaker prevent interphase short circuit by winding an insulating tape (or sleeving a heat-shrinkable tube); however, the phenomenon of insulation damage or falling off is inevitable in the production, assembly and transportation processes of winding the insulating tape (or sleeving the heat-shrinkable tube), so that interphase short circuit can occur under the influence of environmental factors in the use process of the product, the internal part of the product is burnt, and the personal or property safety is threatened. Although some products also consider adding a phase partition plate, the existing phase partition plate has no protection function on the mutual inductor, or the phase partition plate and a protective casing of the mutual inductor are separated, or the assembly difficulty is large.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provides a residual current operated circuit breaker which is simple in structure and assembly.

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

a residual current operated circuit breaker comprises a base, a multi-pole conductive system, a mutual inductor and an insulating housing, wherein the multi-pole conductive system, the mutual inductor and the insulating housing are arranged in the base, the mutual inductor is arranged in the base, each pole of conductive system comprises a piercing connecting piece which penetrates through a mutual inductor through hole of the mutual inductor, the insulating housing comprises a first housing and a second housing which are in splicing fit, the first housing comprises a first housing side plate, a first insulating structure is arranged on one side of the first housing side plate in a protruding mode, the first insulating structure is inserted into the mutual inductor through hole to separate the piercing connecting pieces of the conductive systems, the first insulating structure comprises a first cross plate and a first vertical plate which are in a cross shape, the first insulating structure further comprises an inner side arc-shaped baffle which is connected with the lower side of the first vertical plate, and the inner side arc-shaped baffle corresponds to the lower portion of the inner side wall of the mutual inductor through hole; the second housing comprises a second housing side plate, an outer side arc-shaped baffle is arranged on one side of the second housing side plate in a protruding mode, a horizontal supporting plate is arranged above the outer side arc-shaped baffle of the second housing side plate, and the outer side arc-shaped baffle corresponds to the outer side wall above the mutual inductor.

Preferably, a mutual inductor assembling groove for accommodating the mutual inductor and the insulating housing is formed in the base, a first fixing structure is arranged between the side wall of one side of the first housing and the mutual inductor assembling groove, and a second fixing structure is arranged between the side wall of the other side of the second housing and the mutual inductor assembling groove.

Preferably, a transformer supporting bottom structure for fixing the transformer is arranged at the bottom of the transformer assembling groove.

Preferably, be equipped with first grafting structure on first insulation structure, after the feedthrough connecting piece passed the mutual-inductor through-hole of mutual-inductor, first housing separated the feedthrough connecting piece in inserting first insulation structure in the mutual-inductor through-hole from mutual-inductor one side, and first insulation structure stretches to the mutual-inductor opposite side, be equipped with second grafting structure on the second housing, the second housing is from mutual-inductor opposite side top down assembly, make outside cowl correspond with the lateral wall of mutual-inductor top, and second grafting structure is pegged graft with first grafting structure and is cooperated.

Preferably, the piercing connection piece comprises a piercing section penetrating through the through hole of the mutual inductor, and a first connection section and a second connection section which are respectively connected with two ends of the piercing section, the first connection section and the second connection section are respectively used for being electrically connected with the first wiring end and the contact system, and the first connection section and the second connection section are perpendicularly connected with the piercing section in a bending mode.

Preferably, a first positioning protrusion is further arranged on a first housing side plate of the first housing and used for separating a first connection section of the through connection pieces of the plurality of through connection pieces, the first positioning protrusion corresponds to the outer arc baffle so that a first gap for avoiding the first connection section of the through connection pieces is formed between the first housing side plate and the outer arc baffle, first notches corresponding to the first wiring ends are respectively arranged on two sides of the lower side of the first housing side plate, the first wiring ends extend into the first housing through the first notches and are connected with the first connection section of the through connection pieces, the first connection section is connected with the first wiring ends on the inner side of the first housing side plate facing the second housing, and the first housing side plate is placed on the first wiring ends.

Preferably, the second housing still includes the third curb plate with second housing curb plate parallel arrangement, the side is connected perpendicularly on horizontal support board and the second housing curb plate, the third curb plate is connected with the horizontal support board downside, the third curb plate corresponds with second housing curb plate top region, and form the second clearance of dodging the second linkage segment of wearing the connecting piece between third curb plate and the second housing curb plate, and the below and the horizontal both sides in second clearance are the opening, offer the second that is used for dodging the second linkage segment of wearing the connecting piece at the downside limit of second housing curb plate and dodge the groove, the second linkage segment dodges the groove from the opening in second clearance or second and wears out to be connected with the contact system electricity behind one side that first housing curb plate was kept away from to the second housing curb plate.

Preferably, the second plug structure comprises a third slot formed on the second housing side plate, and the first plug structure comprises a side edge of the corresponding first vertical plate facing the second housing side plate.

Preferably, the end part of the first transverse plate facing the second housing side plate is provided with a limiting convex plate in an upward protruding mode, and the limiting convex plate extends to one side, far away from the first housing side plate, of the second housing side plate to limit the second housing side plate.

Preferably, the four feed-through connecting pieces comprise four feed-through connecting pieces of a quadrupole conducting system, two feed-through connecting pieces respectively penetrate through the upper part and the lower part of one side of the through hole of the mutual inductor, and the other two feed-through connecting pieces respectively penetrate through the upper part and the lower part of the other side of the through hole of the mutual inductor.

The core-through connecting piece of each conductive system is reasonable in layout, the first insulating structure of the insulating protective housing is inserted into the through hole of the transformer to separate the core-through connecting pieces of each conductive system, the creepage distance of the conductive systems can be effectively ensured, the reliability of the conductive systems is improved, the insulating protective housing is assembled by inserting the first housing and the second housing in a matching manner, the assembly of the insulating protective housing can be conveniently realized under the condition that the core-through connecting pieces of each conductive system are installed firstly, the operation is simple, the time consumption of the working procedure is short, the transformer can be protected while the sufficient phase-to-phase insulating performance is ensured, and the insulating protective housing can be used for supporting other components.

In addition, after the mutual inductor is assembled with the piercing connector, the first housing is assembled from one side of the mutual inductor, the second housing is assembled from the upper side of the mutual inductor, the mutual inductor piercing module is formed and then assembled into the base, and the assembly efficiency is high. The transformer support base structure for fixing the transformer, the first fixing structure for fixing the first housing and the second fixing structure for fixing the second housing are arranged in the base, so that the assembled transformer core penetrating module can be reliably and conveniently fixed in the base.

Drawings

Fig. 1 is a schematic view of a part of a residual current operated circuit breaker according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an embodiment of a transformer feedthrough module according to an embodiment of the utility model;

FIG. 3 is a schematic structural diagram of a base according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of a first housing of the embodiment of the present invention;

FIG. 5 is a schematic structural view of a second housing of the embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a transformer in accordance with an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a feedthrough connection for a conductive system of each pole of an embodiment of the present invention.

Detailed Description

The following embodiments are provided in connection with the accompanying drawings to further illustrate the embodiments of the residual current operated circuit breaker of the present invention. The residual current operated circuit breaker of the present invention is not limited to the description of the following embodiments.

As shown in fig. 1, the residual current operated circuit breaker includes a base 1 and each pole conductive system disposed in the base 1, each pole conductive system includes a first terminal 6, a second terminal and a contact system disposed at two ends of the base 1, the contact system includes a moving contact and a static contact connected with the first terminal 6 and the second terminal, the moving contact is mounted on a contact support rotating shaft, the static contact is fixedly mounted in the base 1, a moving contact on the moving contact is disposed corresponding to a static contact on the static contact, an arc extinguish chamber is disposed on the static contact, and an operating mechanism of the circuit breaker drives the contact support rotating shaft to rotate so as to enable the moving contact of the moving contact to contact with and separate from the static contact of the static contact, thereby realizing switching on and switching off of the circuit breaker. The first wiring terminal 6 is connected with the contact system through a piercing connector 5, a mutual inductor 2 is arranged between the first wiring terminal 6 and the contact system, and the piercing connector 5 of each pole conducting system penetrates through the mutual inductor 2 and then is connected with the contact system of the corresponding pole; when the fault current or the personal electric shock occurs in the circuit connected with the circuit breaker, as long as the fault current reaches the setting action current value, the output signal of the secondary winding of the mutual inductor is triggered, and the residual current operated circuit breaker is operated through the electric leakage release, so that the power supply is cut off to play the roles of fault current and electric shock protection.

As shown in fig. 1 to 3, the residual current operated circuit breaker of this embodiment is a four-pole circuit breaker, and includes a four-pole conductive system, which is an a-pole conductive system, a B-pole conductive system, a C-pole conductive system, and an N-pole conductive system, wherein the first terminal 6 of each pole conductive system is connected to the contact system through a feedthrough connector 5, and the feedthrough connector 5 of each pole conductive system is connected to a moving contact or a stationary contact of the contact system of the corresponding pole after passing through the transformer 2. Each pole conducting system of the embodiment comprises four penetrating connecting pieces 5, wherein the four penetrating connecting pieces 5 respectively comprise a first connecting piece 5A, a second connecting piece 5B, a third connecting piece 5C and a fourth connecting piece 5N which penetrate through a mutual inductor 2, and first terminals of each pole conducting system respectively comprise an A-phase first terminal 6A connected with A of a power supply, a B-phase first terminal 6B connected with B, a C-phase first terminal 6C connected with C and an N-phase first terminal 6N connected with N; the a-phase first terminal 6A, B-phase first terminal 6B, C-phase first terminal 6C and the N-phase first terminal 6N are connected to the contact system of the corresponding pole through the first connection piece 5A, the second connection piece 5B, the third connection piece 5C and the fourth connection piece 5N, respectively. Of course, the present invention may be a three-pole circuit breaker or a circuit breaker with other number of poles, and if the present invention is a three-pole circuit breaker, the N-phase first terminal 6N and the fourth connecting member 5N may not be provided.

As shown in fig. 4-5, the insulation protection housing comprises a first housing 3 and a second housing 4 which are in plug-in fit, the first housing 3 comprises a first housing side plate 31, a first insulation structure is convexly arranged on one side of the first housing side plate 31, the first insulation structure is inserted into the mutual inductor through hole 21 to separate the through connectors 5 of each conductive system, the first insulation structure comprises a cross-shaped first transverse plate 32 and a first vertical plate 33, and further comprises an inner arc-shaped baffle 34 connected with the lower side of the first vertical plate 33, and the inner arc-shaped baffle 34 corresponds to the lower part of the inner side wall of the mutual inductor through hole 21 of the mutual inductor 5; the second housing 4 includes a second housing side plate 41, an outer arc-shaped baffle 42 is convexly arranged on one side of the second housing side plate 41, the second housing side plate 41 is provided with a horizontal support plate 43 above the outer arc-shaped baffle 42, and the outer arc-shaped baffle 42 corresponds to the outer side wall above the transformer 2.

The penetrating connecting piece 5 of each pole conducting system is reasonable in layout, the first insulating structure of the insulating protective housing is inserted into the through hole 21 of the mutual inductor to separate the penetrating connecting pieces 5 of each conducting system, the creepage distance of the conducting systems can be effectively ensured, the reliability of the conducting systems is improved, the insulating protective housing is assembled by inserting and matching the first housing 3 and the second housing 4, the first housing 3 is assembled from one side of the mutual inductor 2, the second housing 4 is assembled from the upper part of the mutual inductor 2, the assembly of the insulating protective housing can be conveniently realized under the condition that the penetrating connecting pieces 5 of each pole conducting system are installed in advance, the operation is simple, the time consumption is short, the sufficient interphase insulating performance can be ensured, meanwhile, the protection effect on the mutual inductor 2 is realized, and the penetrating connecting pieces can be used for supporting other components.

Preferably, be equipped with first grafting structure on first insulation system, be equipped with second grafting structure on second housing 4, after feedthrough connecting piece 5 passed mutual-inductor 2's mutual-inductor through-hole 21, first housing 3 separates feedthrough connecting piece 5 in inserting mutual-inductor through-hole 21 with first insulation system from mutual-inductor 2 one side, and first insulation system stretches to mutual-inductor 2 opposite side, be equipped with second grafting structure on second housing 4, second housing 4 is from mutual-inductor 2 opposite side top down assembly, make outside cowl 42 correspond with the lateral wall of mutual-inductor 2 top, and second grafting structure and first grafting structure grafting cooperation.

As shown in fig. 2-3, the mutual inductor 2, the feedthrough connecting piece 5 of each pole conducting system, the first housing 3, the second housing 4 and the first terminal 6 are assembled into a mutual inductor feedthrough module and then integrally mounted in the base 1, a mutual inductor assembly slot 10 for accommodating the mutual inductor 2 and the insulating housing is arranged in the base 1, a first fixing structure is arranged between the first housing 3 and one side wall of the mutual inductor assembly slot 10, and a second fixing structure is arranged between the second housing 4 and the other side wall of the mutual inductor assembly slot 10. Be equipped with a plurality of parallel looks space bars in the base 1 and separate into a plurality of installation each utmost point conducting system's utmost point mounting groove with base 1, mutual-inductor assembly groove 10 is perpendicular and runs through a plurality of utmost point mounting grooves. The first fixing structure of the present embodiment includes a fixing groove 101 provided on a side wall of the transformer mounting groove 10 and a fixing rib 37 provided on a side of the first enclosure 3 away from the second enclosure 4; the second fixing structure includes a fixing groove 101 formed on the other side wall of the transformer assembling groove 10 and a fixing rib (not shown in the figure) formed on the side of the second housing 4 far from the first housing 3, and when the transformer piercing module is assembled, the fixing rib 37 is inserted into the fixing groove 101 to be guided and fixed. Obviously, the fixing grooves 101 and the fixing ribs 37 may be provided in plural sets, the fixing ribs 37 may be provided on the side walls of the transformer mounting groove 10, the fixing grooves 101 are provided on the first enclosure 3 and the second enclosure 4, and other similar structures may be adopted for the first fixing structure and the second fixing structure.

Preferably, a transformer bottom supporting structure 102 for fixing the transformer 2 is arranged at the bottom of the transformer assembling groove 10. The mutual inductor bottom supporting structure 102 of this embodiment includes a bottom supporting protrusion disposed at the bottom of the mutual inductor assembling groove 10, a bottom supporting groove is disposed in the bottom supporting protrusion, and the lower portion of the mutual inductor 2 is inserted into the bottom supporting groove.

During assembly, firstly, after the four penetrating connectors 5 of the conductive system penetrate through the mutual inductor through hole 21 of the mutual inductor 2, the first insulating structure of the first housing 3 is taken to insert into the gap between each penetrating connector 5 and the mutual inductor through hole 21, the end part of each penetrating connector penetrates to the other side of the mutual inductor 2, the cross-shaped first transverse plate 32 and the first vertical plate 33 divide the mutual inductor through hole 21 into four quadrants, the four penetrating connectors 5 are divided, the inner side arc-shaped baffle 34 is correspondingly supported with the inner side wall of the mutual inductor through hole 21, the lower side edge of the side plate 31 of the first housing is supported through the first wiring end 6, then the second housing 4 is taken to be assembled from the upper part of the other side of the mutual inductor 2, the outer side arc-shaped baffle 42 is made to correspond to the outer side wall above the mutual inductor 2, the second plug-in structure is plugged in place with the first plug-in structure to form a mutual inductor penetrating module, and then the mutual inductor penetrating module is assembled along the mutual inductor assembly groove 10 and the mutual inductor support bottom structure 102, the fixed slot 101 and the fixed convex rib 37 are matched to play roles of guiding and fixing, the outer side wall below the mutual inductor 2 is inserted into the bottom supporting slot, and after the assembly is completed, the horizontal supporting plate 43 at the upper end of the second housing 4 can support other parts such as a circuit board, so that the stability is better.

As shown in fig. 2 and 7, the quadrupole conductive system of the present embodiment includes four feedthrough connectors 5, two feedthrough connectors 5 respectively pass through the upper and lower sides of one side of the transformer through hole 21, and the other two feedthrough connectors 5 respectively pass through the upper and lower sides of the other side of the transformer through hole 21, in the present embodiment, the first connector 5A and the second connector 5B respectively pass through the upper and lower sides of one side of the transformer through hole 21 1, and the fourth connector 5N and the third connector 5C respectively pass through the upper and lower sides of the other side of the transformer through hole 21.

Preferably, the feedthrough connection piece 5 comprises a feedthrough section 51 penetrating through the transformer through hole 21, and a first connection section 52 and a second connection section 53 respectively connected with two ends of the feedthrough section 51, the first connection section 52 and the second connection section 53 are respectively used for electrically connecting with the first terminal 6 and the contact system, the first connection section 52 and the second connection section 53 are perpendicularly connected with the feedthrough section 51 in a bent manner, and the plane of the first connection section 51 and the plane of the second connection section 53 are substantially perpendicular to the plane of the feedthrough section 51. In the embodiment, the first connecting piece 5A and the fourth connecting piece 5N are similar in structure, the second connecting piece 5B is similar in structure to the third connecting piece 5C, and the first connecting section 51 and the second connecting section 53 of the first connecting piece 5A and the fourth connecting piece 5N are longer than the second connecting piece 5B and the third connecting piece 5C because the first connecting piece 5A and the fourth connecting piece 5N are positioned on the outer sides; the first link 5A and the second link 5B are substantially axisymmetric to the third link 5C and the fourth link 5N with the first riser 33 as an axis.

Preferably, as shown in fig. 4 to 5, the first housing side plate 31 of the first housing 3 is further provided with a first positioning protrusion 35, the first positioning protrusion 35 is used for partitioning the first connection segment 52 of the feedthrough connector 5 of the plurality of feedthrough connectors 5, the first positioning protrusion 35 corresponds to the outer arc-shaped baffle 42 to form a first gap 38 between the first housing side plate 31 and the outer arc-shaped baffle 42 to avoid the first connection section 52 of the feedthrough connection piece 5, first notches 39 corresponding to the first terminals 6 are respectively arranged on two sides of the lower side edge of the first housing side plate 31, the first terminals 6 extend into the first housing 3 through the first notches 39 to be connected with the first connection section 52 of the feedthrough connection piece 5, the first connection section 52 is connected with the first terminals 6 on the inner side of the first housing side plate 31 facing the second housing 4, and the first housing side plate 31 is placed on the first terminals 6. In this embodiment, the first housing side plate 31 is placed on the B-phase first terminal 6B and the C-phase first terminal 6C, the first connecting sections 52 of the second connecting member 5B and the third connecting member 5C are directly connected to the first terminals 6B and the C-phase first terminal 6C, and the second connecting sections 53 of the first connecting member 5A and the fourth connecting member 5N are opened from both sides of the first gap 38 to be connected to the a-phase first terminals 6A and the N-phase first terminal 6N.

Preferably, the second housing 4 further includes a third side plate 45 disposed in parallel with the second housing side plate 41, the horizontal support plate 43 is vertically connected with an upper side of the second housing side plate 41, the third side plate 45 is connected with a lower side surface of the horizontal support plate 43, the third side plate 45 corresponds to an area above the second housing side plate 41, a second gap 44 for avoiding the second connection segment 53 of the feedthrough connecting piece 5 is formed between the third side plate 45 and the second housing side plate 41, and both the lower side and the horizontal side of the second gap 44 are open, a second avoiding groove 47 for avoiding the second connection segment 53 of the feedthrough connecting piece 5 is opened on the lower side of the second housing side plate 41, and the second connection segment 53 penetrates out of the second opening or the second avoiding groove 47 of the second gap 44 to one side of the second housing side plate 41 far away from the first housing side plate 31 and then is electrically connected with the contact system. In this embodiment, the second connecting sections 53 of the second connecting piece 5B and the third connecting piece 5C pass through the second avoiding groove 47, and the second connecting sections 53 of the first connecting piece 5A and the fourth connecting piece 5N pass through openings on both sides of the second gap 44.

Preferably, the first housing 3 and the second housing 4 are fixed in an inserting and matching manner, the first insulating structure is provided with a first inserting structure, the second housing 4 is provided with a second inserting structure, and the first inserting structure and the second inserting structure are in inserting and matching. In this embodiment, the first inserting structure includes a first inserting groove 361 disposed on the upper side of the first vertical plate 33, and a second inserting groove 362 disposed on the two sides of the first horizontal plate 32; the second inserting structure includes a lower side of the corresponding third side plate 45 and both side sides of the second avoiding groove 47 of the second housing side plate 41.

Preferably, the second plug structure includes a third insertion slot 463 formed in the second housing side plate 41, and the first plug structure includes a side edge of the corresponding first vertical plate 33 facing the second housing side plate 41. In this embodiment, two ribs are protruded from the second cover side plate 41 at intervals in parallel to form the third insertion groove 463. Preferably, a limiting convex plate 364 is provided at the end of the first horizontal plate 32 facing the second housing side plate 41 in a protruding manner, and the limiting convex plate 364 extends to the side of the second housing side plate 41 away from the first housing side plate 31 to limit the second housing side plate 41.

During insertion, the lower side of the third side plate 45 is inserted into the first insertion groove 361, the two sides of the second avoiding groove 47 of the second housing side plate 41 are inserted into the second insertion groove 362, the side of the first vertical plate 33 is inserted into the third insertion groove 463, the upper side of the second avoiding groove 47 is arranged on the first transverse plate 32, and the limiting convex plate 364 extends to one side of the second housing side plate 41 far away from the first housing side plate 31 and limits the second housing side plate 41.

Preferably, the insulation protection housing is made of a thermoplastic material with high temperature resistance and good insulation performance, so that an insulation tape does not need to be wound on the piercing connector 5, and the problem that in the prior art, the insulation damage or falling-off problem caused by the fact that interphase short circuit is easily caused in the production, assembly and transportation processes is solved by winding the insulation tape (or sleeving a heat-shrinkable tube).

The foregoing is a more detailed description of the utility model in connection with specific preferred embodiments and it is not intended that the utility model be limited to these specific details. For those skilled in the art to which the utility model pertains, numerous simple deductions or substitutions may be made without departing from the spirit of the utility model, which shall be deemed to belong to the scope of the utility model.

Claims

1. The utility model provides a residual current operated circuit breaker, includes base (1), sets up multipolar conductive system, mutual-inductor (2) and the insulating housing in base (1), and mutual-inductor (2) set up in base (1), and every utmost point conductive system is including piercing through connecting piece (5) of mutual-inductor through-hole (21) that pass mutual-inductor (2), its characterized in that:

the insulation housing comprises a first housing (3) and a second housing (4) which are matched in an inserting mode, the first housing (3) comprises a first housing side plate (31), a first insulation structure is arranged on one side of the first housing side plate (31) in a protruding mode and is inserted into a mutual inductor through hole (21) to separate the through connecting pieces (5) of all the conductive systems, the first insulation structure comprises a first cross plate (32) and a first vertical plate (33) which are crossed, the insulation housing further comprises an inner side arc-shaped baffle (34) connected with the lower side edge of the first vertical plate (33), and the inner side arc-shaped baffle (34) corresponds to the lower portion of the inner side wall of the mutual inductor through hole (21);

the second housing (4) comprises a second housing side plate (41), an outer side arc-shaped baffle plate (42) is arranged on one side of the second housing side plate (41) in a protruding mode, a horizontal supporting plate (43) is arranged above the outer side arc-shaped baffle plate (42) of the second housing side plate (41), and the outer side arc-shaped baffle plate (42) corresponds to the outer side wall above the mutual inductor (2).

2. The residual current operated circuit breaker according to claim 1, characterized in that: the transformer assembling groove (10) for accommodating the transformer (2) and the insulating housing is arranged in the base (1), a first fixing structure is arranged between the side wall of one side of the first housing (3) and the side wall of one side of the transformer assembling groove (10), and a second fixing structure is arranged between the side wall of the other side of the second housing (4) and the side wall of the other side of the transformer assembling groove (10).

3. The residual current operated circuit breaker according to claim 2, characterized in that: and a mutual inductor support bottom structure for fixing the mutual inductor (2) is arranged at the bottom of the mutual inductor assembling groove (10).

4. The residual current operated circuit breaker according to claim 1, characterized in that: be equipped with first grafting structure on first insulation structure, cross-core connecting piece (5) pass mutual-inductor through-hole (21) back of mutual-inductor (2), first housing (3) are from mutual-inductor (2) one side with first insulation structure insert mutual-inductor through-hole (21) interior separation cross-core connecting piece (5), and first insulation structure stretches mutual-inductor (2) opposite side, be equipped with second grafting structure on second housing (4), second housing (4) are from mutual-inductor (2) opposite side top down assembly, make outside cowl (42) correspond with the lateral wall of mutual-inductor (2) top, and the cooperation of pegging graft of second grafting structure and first grafting structure.

5. The residual current operated circuit breaker according to claim 4, characterized in that: the feed-through connecting piece (5) comprises a feed-through section (51) penetrating through the mutual inductor through hole (21), and a first connecting section (52) and a second connecting section (53) which are respectively connected with two ends of the feed-through section (51), wherein the first connecting section (52) and the second connecting section (53) are respectively used for being electrically connected with a first wiring terminal (6) and a contact system, and the first connecting section (52) and the second connecting section (53) are perpendicularly connected with the feed-through section (51) in a bending mode.

6. The residual current operated circuit breaker according to claim 5, characterized in that: the first housing side plate (31) of the first housing (3) is further provided with a first positioning protrusion (35), the first positioning protrusion (35) is used for separating a first connecting section (52) of the through connecting pieces (5), the first positioning protrusion (35) corresponds to the outer side arc baffle (42) to enable a first gap (38) which avoids the first connecting section (52) of the through connecting piece (5) to be formed between the first housing side plate (31) and the outer side arc baffle (42), two sides of the lower side edge of the first housing side plate (31) are respectively provided with a first notch (39) corresponding to the first wiring end (6), the first wiring end (6) extends into the first housing (3) through the first notch (39) and is connected with the first connecting section (52) of the through connecting piece (5), and the first connecting section (52) is connected with the first wiring end (6) on the inner side of the first housing (31) facing the second housing (4), a first housing side plate (31) is placed on the first terminal (6).

7. The residual current operated circuit breaker according to claim 6, characterized in that: the second housing (4) further comprises a third side plate (45) arranged in parallel with the second housing side plate (41), the horizontal support plate (43) is vertically connected with the upper side of the second housing side plate (41), the third side plate (45) is connected with the lower side surface of the horizontal support plate (43), the third side plate (45) corresponds to the upper area of the second housing side plate (41), a second gap (44) avoiding a second connecting section (53) of the piercing connecting piece (5) is formed between the third side plate (45) and the second housing side plate (41), the lower side and the horizontal two sides of the second gap (44) are both openings, a second avoiding groove (47) used for avoiding the second connecting section (53) of the piercing connecting piece (5) is arranged on the lower side of the second housing side plate (41), and the second connecting section (53) penetrates out of the opening or the second avoiding groove (47) of the second housing side plate (44) to the side of the second housing side plate (41), which is far away from the first housing side plate (31), and the contact system And the system is electrically connected.

8. The residual current operated circuit breaker according to claim 7, characterized in that: the second plug structure comprises a third insertion groove (463) formed on the second housing side plate (41), and the first plug structure comprises a corresponding first vertical plate (33) facing to the side edge of the second housing side plate (41).

9. The residual current operated circuit breaker according to claim 7, characterized in that: a limiting convex plate (364) is arranged at the end part of the first transverse plate (32) facing the second housing side plate (41) in an upward protruding mode, and the limiting convex plate (364) extends to one side, away from the first housing side plate (31), of the second housing side plate (41) to limit the second housing side plate (41).

10. The residual current operated circuit breaker according to claim 1, characterized in that: the four-pole four-through connecting piece transformer comprises four through connecting pieces (5) of a four-pole conducting system, wherein two through connecting pieces (5) respectively penetrate through the upper part and the lower part of one side of a transformer through hole (21), and the other two through connecting pieces (5) respectively penetrate through the upper part and the lower part of the other side of the transformer through hole (21).