CN203607344U

CN203607344U - Large-current plastic shell leakage circuit breaker

Info

Publication number: CN203607344U
Application number: CN201320576408.4U
Authority: CN
Inventors: 朱明龙; 吴立珠
Original assignee: CHANG'AN GROUP Co Ltd
Current assignee: CHANG'AN GROUP Co Ltd
Priority date: 2013-09-13
Filing date: 2013-09-13
Publication date: 2014-05-21
Anticipated expiration: 2023-09-13

Abstract

The utility model provides a large-current plastic shell leakage circuit breaker. The leakage circuit breaker comprises a mould-pressed plastic upper cover, a mould-presses base, a wire inlet element, wire outlet elements, moving contacts, an arc extinguish chamber, an operating mechanism, an electromagnetic mechanism and a leakage protector. The leakage protector comprises a zero-sequence current transformer, an electronic component plate and a leakage tripping device; the zero-sequence current transformer is arranged in an aisle between the electromagnetic mechanism and the wire outlet elements, the electronic component plate is arranged on the left side of the zero-sequence current transformer, the leakage tripping device is arranged in a space which is on the right side of the an action handle of the operating mechanism and above the upper part of the C-phase moving contact, an insulation baffle plate is arranged between the B-phase element and the C-phase element, and insulation sleeves are arranged on the A-phase and zero-line N elements and at adjacent position of the B-phase and C-phase elements. Main parts of the large-current plastic shell leakage circuit breaker are completely universal with main parts of a plastic shell circuit breaker having the same specification with the large-current plastic shell leakage circuit breaker, and double insulation are arranged between the wire outlet elements at the same time so that insulation strength of the wire outlet elements when the wire outlet elements pass through the zero-sequence current transformer is guaranteed.

Description

A kind of large electric current is moulded shell residual current circuit breaker

Technical field

The utility model relates to a kind of residual current circuit breaker, relates in particular to a kind of large electric current and moulds shell residual current circuit breaker.

Background technology

Residual current circuit breaker is a kind of conventional protective device, be usually used in the indirect protection of person electric shock and prevent the electrical fire that electrical equipment grounding fault causes, also there is the overload of general circuit breaker simultaneously, short-circuit protection function, this residual current circuit breaker often converts on the circuit breaker of same model, some manufacturers change the shell structure of circuit breaker or change the structure of circuit breaker components, to the circuit breaker of residual current circuit breaker and same specification can be shared to a housing, often increase a large amount of equipment investments, in addition, four of residual current circuit breaker go out kind of thread elements all will pass zero sequence current mutual inductor, because installing space is very little, four interelement insulation of outlet are difficult to control, generally adopt and on element, be wound around insulating tape, although this structure is simple, but give residual current circuit breaker particularly the main circuit insulation of large current leakage circuit breaker bring hidden danger.

Summary of the invention

The purpose of this utility model is to overcome the deficiency of conventional art, provide one can be with same specification breaker of plastic casing common-base, go out kind of thread elements and adopt the large electric current of double insulated one to mould shell residual current circuit breaker.

In order to realize above-mentioned order ground, this large electric current plastic enclosure leakage circuit breaker comprises upper plastic cover and the base of mold pressing, with the inlet wire element of fixed contact, go out kind of thread elements, moving contact, be installed in the arc control device of dynamic/static contact deciliter portion, comprise and move the operating mechanism of handle, electromagnetic mechanism and earth leakage protective device, described earth leakage protective device comprises zero sequence current mutual inductor, electric sub-member plate and leakage tripping device, described zero sequence current mutual inductor is arranged on electromagnetic mechanism and goes out in the passageway between kind of thread elements, described electric sub-member plate is arranged on the left side of zero sequence current mutual inductor, described leakage tripping device is arranged on action handle right side, in the space on C phase moving contact top, the described kind of thread elements that goes out comprises A phase, B phase, C phase, the kind of thread elements that goes out that tetra-of zero line N contain binding post, four go out kind of thread elements when the zero sequence current mutual inductor by A phase, B phase, C phase, zero line N phase sequence is arranged, especially, be tied with the B phase of insulating tape, between C phase element, be provided with insulating barrier, be tied with the A phase of insulating tape, on zero line N element with B phase, the place of pressing close to of C phase element is provided with insulating case, like this in A phase, B phase, C phase, tetra-of zero line N go out between kind of thread elements, to be provided with double insulation, guarantee A phase, B phase, C phase, dielectric strength when tetra-of zero line N go out kind of thread elements through zero sequence current mutual inductor.

The beneficial effect that the utility model brings is: zero sequence current mutual inductor, electric sub-member plate and the leakage tripping device of moulding shell residual current circuit breaker are all arranged in the base of same specification breaker of plastic casing, moulding like this shell residual current circuit breaker just can be completely general with the critical piece of same specification breaker of plastic casing, simultaneously owing to going out kind of thread elements to be provided with double insulation through four of zero sequence current mutual inductor, effectively guarantee that large electric current moulds the dielectric strength of shell residual current circuit breaker.

accompanying drawing explanation

Fig. 1 is the utility model embodiment Facad structure schematic diagram.

Fig. 2 is the cross-sectional view of the utility model embodiment.

Fig. 3 is the utility model embodiment outlet element mounting structure schematic diagram.

Fig. 4 is the front view of the utility model embodiment insulating case.

Fig. 5 is the cutaway view of the utility model embodiment insulating case.

Fig. 6 is the cutaway view of the utility model embodiment insulating barrier.

Fig. 7 is the front view of the utility model embodiment insulating barrier.

embodiment

As shown in Fig. 1-7, a kind of large electric current is moulded shell residual current circuit breaker, comprises upper plastic cover 1 and the base 2 of mold pressing, with the inlet wire element 3 of fixed contact, go out kind of thread elements 7, moving contact 5, be installed in the arc control device 4 of dynamic/static contact deciliter portion, comprise and move the operating mechanism 10 of handle, electromagnetic mechanism 9 and earth leakage protective device, described earth leakage protective device comprises zero sequence current mutual inductor 11, electric sub-member plate 12 and leakage tripping device 6, described zero sequence current mutual inductor 11 is arranged on electromagnetic mechanism 9 and goes out in the passageway between kind of thread elements 7, described electric sub-member plate 12 is arranged on the left side of zero sequence current mutual inductor 11, and described leakage tripping device 6 is arranged on the right side of action handle 10, in the space on C phase moving contact 5 tops, the described kind of thread elements that goes out comprises 71, 72, 73, 74 is A phase, B phase, C phase, the kind of thread elements that goes out that tetra-of zero line N contain binding post, four go out kind of thread elements when the zero sequence current mutual inductor by A phase, B phase, C phase, zero line N phase sequence is arranged, and is being tied with the B phase of insulating tape, between C phase element, be provided with insulating barrier 8, described insulating barrier is I-shaped, is manufactured by anti-flaming ABS material, is being tied with the A phase of insulating tape, on zero line N element with B phase, the place of pressing close to of C phase element is provided with insulating case, and described insulating case 14 is syphon shape, manufactures, like this in A phase by strengthening fire-retardant nylon PA66 material, B phase, C phase, tetra-of N go out between kind of thread elements to be provided with double insulation, have guaranteed A phase, B phase, C phase, dielectric strength when tetra-of N go out kind of thread elements through zero sequence current mutual inductor.

The beneficial effect that above structure is brought is: because zero sequence current mutual inductor 11 and electric sub-member plate 12 are arranged on electromagnetic mechanism 9 and go out between kind of thread elements 7, as breaker of plastic casing, this position is the passageway that A phase, B phase, C phase, tetra-of zero line N go out kind of thread elements, leakage tripping device 6 is arranged on the right side of action handle 10, the top of C phase moving contact 5, as breaker of plastic casing

Shi Ge space, this position; the setting of earth leakage protective device three large parts does not all have to increase space on breaker of plastic casing base like this; moulding like this shell residual current circuit breaker just can be completely general with the critical piece of the breaker of plastic casing of same specification; realize the standardized production of parts; go out between kind of thread elements to be provided with double insulation at A phase, B phase, C phase, tetra-of zero line N, guaranteed dielectric strength when A phase, B phase, C phase, tetra-of zero line N go out kind of thread elements through zero sequence current mutual inductor.

Claims

1. a large electric current is moulded shell residual current circuit breaker, comprise upper plastic cover and the base of mold pressing, with the inlet wire element of fixed contact, go out kind of thread elements, moving contact, be installed in the arc control device of dynamic/static contact deciliter portion, comprise and move the operating mechanism of handle, electromagnetic mechanism and earth leakage protective device, described earth leakage protective device comprises zero sequence current mutual inductor, electric sub-member plate and leakage tripping device, described zero sequence current mutual inductor is arranged on electromagnetic mechanism and goes out in the passageway between kind of thread elements, described electric sub-member plate is arranged on the left side of zero sequence current mutual inductor, described leakage tripping device is arranged on action handle right side, in the space on C phase moving contact top.

2. large electric current according to claim 1 is moulded shell residual current circuit breaker, it is characterized in that: described arrange by A phase, B phase, C phase, zero line N order while going out kind of thread elements through zero sequence current mutual inductor, between B phase, C phase element, be provided with insulating barrier, on A phase, zero line N element, be provided with insulating case with the place of pressing close to of B phase, C phase element.