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Low voltage circuit breaker with quick actuating function

A low-voltage circuit and circuit breaker technology, which is applied to circuit breaker components, electromagnetic release switches, protection switch operation/release mechanisms, etc., can solve problems that have not yet been perfected

Active Publication Date: 2010-06-09
ZHEJIANG CHINT ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technical solution effectively improves the disconnection performance in miniature circuit breakers, but it has not yet reached perfection

Method used

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  • Low voltage circuit breaker with quick actuating function
  • Low voltage circuit breaker with quick actuating function
  • Low voltage circuit breaker with quick actuating function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] see figure 1 , the low-voltage circuit breaker 1 with air pressure tripping function (the circuit breaker is in the closing position) has a housing 12, the handle 3 is installed on the pivot 2 of the housing 12, and the handle 3 can rotate around the pivot 2 in the closing position and the breaking position. Rotate between open positions. The operating mechanism 7 is installed on the pivot 6 in the casing 12, and rotates around the pivot 6 between the closing position and the disconnecting position, so that the moving contact 10 assembled on the operating mechanism 7 is in the closing position and the breaking position. Rotate between open positions. The connecting rod 4 is used to connect the handle 3 and the operating mechanism 7 to make the circuit breaker 1 move in a four-bar linkage mechanism. The trip lever 8 is installed on the operating mechanism 7, and its function is obvious, which can speed up the movement of the movable contact 10. The static contact 13 i...

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PUM

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Abstract

The circuit breaker in low voltage includes shell body and handle. Following parts are setup inside the shell body: operating mechanism, at least an arc extinguishing system, electromagnetic trippingsystem, actuator, and at least a pair of static contactor and a pair of moving contactor configured oppositely. Characters are that a piston device is setup between the actuator and the extinguishingsystem. The piston device includes parts: piston cavity body connected to the extinguishing system; being setup inside the piston cavity body, piston rod with its end portion being configured to the first rod of the actuator oppositely; and a reset spring. Features are that when short circuit in large current occurs, the disclosed breaker acts before electromagnetic tripping system acts, which isto say it acts within shorter time so as to cut off circuit more safely.

Description

technical field [0001] The invention relates to a low-voltage electrical appliance, in particular to a low-voltage circuit breaker with a quick actuation function, in particular to a low-voltage miniature circuit breaker with an air pressure tripping function. Background technique [0002] As we all know, low-voltage electrical systems require the use of appropriate protective devices, which are generally circuit breakers and miniature circuit breakers. The width of the miniature circuit breaker is the width of the standard module or a multiple of the width of the standard module. In the relevant international standards, the miniature circuit breaker is generally installed on the standard DIN rail (that is, the rail conforming to the German Industrial Standard). The main requirement for miniature circuit breakers is the ability to ensure an adequate level of protection against any fault occurring in the low voltage electrical system with fast opening times while occupying as...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H71/12H01H71/24H01H73/38H01H73/18
Inventor 敖登贵汪泰宇鲁骞
Owner ZHEJIANG CHINT ELECTRIC CO LTD