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Bipolar circuit breaker

A circuit breaker and current relay technology, applied in the field of double-pole circuit breakers, can solve the problems of easy failure, complex coordination relationship, and insufficient response, and achieve the effects of low cost, wide versatility, and convenient installation

Active Publication Date: 2011-08-24
KEDU ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The above-mentioned type of circuit breaker mainly focuses on the linkage and cooperation relationship between the circuit protection mechanism and the tripping mechanism, as well as the structure of the snapping and disengaging of the tripping mechanism itself. Is the response is not sensitive enough, prone to failure, etc.

Method used

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Examples

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Embodiment Construction

[0023] Such as figure 1 — Figure 10 As shown, a double-pole circuit breaker includes a housing 1, an operating handle 2 disposed in the housing 1, a static contact 3, a moving contact 4, an arc extinguishing device 5, a current relay device 6 and a tripping mechanism 7. The moving contact 4 is set on the tripping mechanism 7. In this embodiment, the operating handle 2, the static contact 3, the moving contact 4, the arc extinguishing device 5, and the current relay device 6 are all It is a conventional technology, and it can also be seen in ordinary circuit breakers, so we will not describe it in detail here. In the embodiment of the present invention, the tripping mechanism 7 includes a runner 71 and a tripping frame 72 , sudden jump frame 74, sudden jump frame rotating shaft 78, tripping frame spring 73, limit rotating shaft 75, tripping plate 76 and torsion spring 77, wherein the operating handle 2 is hinged on the housing 1, and one side thereof passes through the connec...

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Abstract

The invention relates to a circuit breaker used for providing overload and short-circuit protection for electric circuits and electrical appliances, in particular relating to a bipolar circuit breaker. The technical scheme provided by the invention is as follows: the bipolar circuit breaker is characterized in that a tripping mechanism comprises a rotating wheel, a tripping frame, a sudden jump frame, a rotating shaft of the sudden jump frame, a spring of the tripping frame, a position-limiting rotating shaft, a tripping plate and a torsion spring, wherein a tension spring is arranged in the rotating wheel and a housing of the tripping mechanism, convex columns are arranged on two sides of the rotating wheel, moving contacts are sheathed on the convex columns, one end of the torsion spring is clamped on the moving contact, and the other end of the torsion spring is clamped on the rotating wheel. By adopting the scheme, the invention provides the novel bipolar circuit breaker which is simple in structure and can enable the pressure between contact points to meet the requirements of the circuit breaker in circuit environments with different current intensities; and furthermore, the tripping force of the tripping mechanism does not change, the sensitivity of the circuit breaker is not affected, and the universality is wide.

Description

technical field [0001] The invention relates to a circuit breaker which provides overload and short-circuit protection for electrical circuits and electrical equipment, in particular to a double-pole circuit breaker. Background technique [0002] At present, there are many types of circuit breakers, and their working principles are also different. One type of circuit breaker uses circuit protection mechanisms such as short-circuit current relays and bimetal sheets inside and a tripping mechanism that cooperates with these protection mechanisms, and the action triggers The point is set on the tripping mechanism, and through the corresponding action of the circuit protection mechanism on overload, short circuit, etc. in the circuit, the tripping mechanism is driven to move and then the moving contact is separated from the static contact to realize the disconnection protection of the circuit. [0003] The above-mentioned type of circuit breaker mainly focuses on the linkage and...

Claims

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Application Information

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IPC IPC(8): H01H71/12
Inventor 郑春开
Owner KEDU ELECTRIC CO LTD
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