CN202167434U

CN202167434U - Circuit breaker

Info

Publication number: CN202167434U
Application number: CN201120236223XU
Authority: CN
Inventors: 迟长春; 郭环球
Original assignee: Shanghai Dianji University
Current assignee: Shanghai Dianji University
Priority date: 2011-07-06
Filing date: 2011-07-06
Publication date: 2012-03-14
Anticipated expiration: 2021-07-06

Abstract

The utility model discloses a circuit breaker, comprising a tripping device, an electromagnet system and a conductive busbar, wherein the tripping device comprises a keeper; the electromagnet system comprises an integrated iron core shaped as a letter U; the conductive busbar is fixed in the integrated iron core; and the integrated iron core has a simple structure and low magneto-resistance, so that the electromagnetic force of the keeper and the integrated iron core is strengthened.

Description

Circuit breaker

Technical field

The utility model relates to the breaker technical field of low-voltage electrical apparatus, relates in particular to circuit breaker.

Background technology

The circuit breaker of DW15-1000 of the prior art～1600A band overcurrent release device; Shown in accompanying drawing 1, accompanying drawing 2, it comprises tripping system 11 and electromagnet system, comprises armature 12 and two connecting plates, indication piece, spring, pointer, adjusting bolt etc. on the tripping system 11; Electromagnet system is made up of three iron leg cores; Be respectively first iron core 13, second iron core 14, the 3rd iron core 15, fixing with screw 18 through screw 17, conductive bus bar 16 passes electromagnet system.The electromagnet system magnetic resistance of this structure circuit breaker is big, installs complicated.

In the DW15-1000 Series Circuit Breakers; When the electric current of the circuit breaker conductive bus bar of rated current 630A and two kinds of specifications of rated current 800A surpasses rated current; The electromagnetic attraction that electromagnet system produces is less, can not overcome the counter-force of being made up of spring and switch tripping force, and switch can't break off.And the current value of circuit breaker has surpassed permissible variation at this moment, makes the skew of switch protection value.And prior art is optimized the spring that this improvement also only rests on tripping system.Therefore, the problem that prior art exists is: the magnetic resistance of circuit breaker electric magnet system is big, can not produce enough electromagnetic forces killer switch is broken off, and install complicated.

The utility model content

The purpose of the utility model is in order to address the above problem, to provide a kind of simple in structure, the circuit breaker that the magnetic resistance of electromagnet system is little.

The technical scheme that the utility model is taked is:

A kind of circuit breaker comprises trip gear, electromagnet system and conductive bus bar, and said trip gear comprises armature; Said electromagnet system comprises iron core, it is characterized in that, said iron core is the one iron core; Be the U font, said conductive bus bar passes said one iron core and is fixed in the one iron core.

Further, be respectively equipped with the magnetic boots at the two ends, top of said one iron core, the width of magnetic boots is two times of one iron core thickness.

Further, said one iron core is two times of one iron core thickness along the axial width of conductive bus bar, the size of said armature and one iron core upper top measure-alike.

The beneficial effect of the utility model circuit breaker is:

The structure of integral type iron core has reduced magnetic resistance, and simple in structure; The increase of magnetic boots structure and iron core width has strengthened the bonded area with armature, has improved electromagnetic attraction.

Description of drawings

Accompanying drawing 1 is the structural representation of circuit breaker in the prior art;

Accompanying drawing 2 is A-A cutaway views of accompanying drawing 1.

Label in the accompanying drawing is respectively:

11. tripping system; 12. armature; 13. first iron core;

14. second iron core; 15. the 3rd iron core; 16. conductive bus bar;

17. screw; 18. screw.

Accompanying drawing 3 is structural representations of the utility model circuit breaker;

Accompanying drawing 4 is B-B cutaway views of accompanying drawing 3.

Label in the accompanying drawing is respectively:

21. tripping system; 22. armature; 23. one iron core;

24. magnetic boots; 25. conductive bus bar; 26. screw;

27. screw.

Embodiment

Elaborate below in conjunction with the embodiment of accompanying drawing to the utility model circuit breaker.

Referring to accompanying drawing 3 and 4, a kind of circuit breaker comprises trip gear 21, electromagnet system and conductive bus bar 25; Said trip gear 21 can adopt existing, comprises armature 22, and said electromagnet system comprises one iron core 23; One iron core 23 is a U font structure; Conductive bus bar 25 also can be selected current version for use, and it passes one iron core 23 and is arranged in the U font structure, and is fixed in the one iron core 23 with screw 16 and screw 27.

Two ends, top at one iron core 23 are respectively equipped with magnetic boots 24; The width of magnetic boots 24 can be made as two times of thickness of one iron core 23; Being provided with of magnetic boots 24 increased the contact area of armature 22 with one magnetic core 23; Thereby increased electromagnetic force, in addition at one iron core 23 along increasing size on the axial width of conductive bus bar 25, the armature 22 and the contact area of one magnetic core 23 are further increased; One iron core 23 can be made as two times of one iron core 23 thickness along the axial width of conductive bus bar 25, and at this moment the size of armature 22 also is made as measure-alike with the upper top of one iron core 23.

The above only is the preferred implementation of the utility model; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; Can also make some improvement and retouching, these improvement and retouching also should be regarded as the protection range of the utility model.

Claims

1. a circuit breaker comprises trip gear, electromagnet system and conductive bus bar, and said trip gear comprises armature; Said electromagnet system comprises iron core; It is characterized in that: said iron core is the one iron core, is the U font, and said conductive bus bar passes said one iron core and is fixed in the one iron core.

2. circuit breaker according to claim 1 is characterized in that: the two ends, top at said one iron core are respectively equipped with the magnetic boots, and the width of magnetic boots is two times of one iron core thickness.

3. circuit breaker according to claim 1 and 2 is characterized in that: said one iron core is two times of one iron core thickness along the axial width of conductive bus bar, the size of said armature and one iron core upper top measure-alike.