Current-limiting type liquid-magnet type miniature circuit breaker

A miniature circuit breaker and current-limiting technology, applied in the direction of protection switch operation/release mechanism, etc., can solve the problem of low short-circuit breaking capacity and so on

Inactive Publication Date: 2013-07-24
陈洪元 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a liquid magnetic miniature circuit breaker using electric repulsion short-circuit current limiting technology, which can overcome som

Method used

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  • Current-limiting type liquid-magnet type miniature circuit breaker
  • Current-limiting type liquid-magnet type miniature circuit breaker
  • Current-limiting type liquid-magnet type miniature circuit breaker

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0016] The figure numbers in the drawings and descriptions of the present invention are as follows: 1—handle 2—jumper 3—locker 4—connection plate 5—contact support 6—contact pivot 7—contact pressure spring 8—the first A wiring board 9—static contact 10—moving contact 11—arc partition 12—first soft connection 13—repulsion unlocking machine 14—repulsion unlocking machine push rod 15—arc guide plate 16—arc extinguishing cover 17—damper 18—deflector 19—second terminal plate 20—insulation shell 21—second soft connection 22—excitation coil 23—pole shoe 24—armature 25—yoke

[0017] The present invention mainly includes a housing 20 and an oil damping overcurrent tripping mechanism, an operating mechanism, a conductive system and an arc extinguishing system arranged in the housing. The current tripping mechanism and the repulsion force quick unlocking mechanis...

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PUM

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Abstract

The invention provides an electro-dynamic repulsion force short circuit current-limiting releasing technology of a liquid-magnet type miniature circuit breaker which is used for the over-current protection and the short-circuit protection in power transmission and distribution process, and particularly relates to the liquid-magnet type miniature circuit breaker which is used for the over-current protection and the short-circuit protection in the power transmission and distribution. The liquid-magnet type miniature circuit breaker thoroughly solves the problems that an existing liquid-magnet type miniature circuit breaker has no short-circuit current-limiting function and is not high in breaking capacity. The electro-dynamic repulsion force short circuit current-limiting releasing technology is that an electro-dynamic repulsion force short circuit current-limiting releasing mechanism is arranged between a movable contact and a fixed contact, when a short-circuit current appears, the movable contact and the fixed contact are rapidly separated under the action of electro-dynamic repulsion force, the current in a circuit is rapidly cut off, a voltaic arc is drawn long and thin in the process of cutting off the current, a large arc resistor is formed, an arc voltage is instantly improved, therefore, an expected short-circuit current can not be completely formed, and a role of limiting a current is played. Meanwhile, a movement pushing repulsion unlocking machine of the movable contact rapidly unlocks an unlocking control mechanism to enable the movable contact not to return and to turn on a return circuit.

Description

technical field [0001] The invention relates to the technical field of circuit protection, in particular to a liquid magnetic miniature circuit breaker with the function of short-circuit current-limiting quick release and used for over-current protection and short-circuit protection in power transmission and distribution. Background technique [0002] Existing thermal magnetic miniature circuit breakers are widely used in power transmission and distribution as overcurrent protection and short circuit protection. Thermal magnetic miniature circuit breakers have two tripping devices: a thermal time-delay tripping device and a magnetic instantaneous tripping device. The thermal time-delay tripping device responds to the current overload, and the current overload automatically activates the operating mechanism to open the circuit; the thermal time-delay tripping device is controlled by a bimetallic strip, one end of the bimetallic strip is kept fixed, and the other end is free t...

Claims

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Application Information

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IPC IPC(8): H01H71/24
Inventor 王华王海波
Owner 陈洪元
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