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Back-up protection device for frame type circuit breaker

A technology of backup protection device and frame type circuit breaker, which is applied in the direction of protection switch operation/release mechanism, etc., can solve the problems of failure of protection characteristics and slow operation speed of circuit breaker, and achieve improved reliability, small size, stable and reliable operation Effect

Active Publication Date: 2015-06-10
CHANGSHU GUORUI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantages of the smart release are: electronic components are prone to failure of protection characteristics due to the influence of electromagnetic interference; the main chip of the smart release needs to go through an initialization time of about 20ms at the initial stage of power-on, once a short circuit occurs during the initialization process, the circuit breaks The action speed of the device is slow

Method used

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  • Back-up protection device for frame type circuit breaker
  • Back-up protection device for frame type circuit breaker
  • Back-up protection device for frame type circuit breaker

Examples

Experimental program
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Embodiment Construction

[0020] See attached figure 1 , a backup protection device for a frame type circuit breaker, which includes: an electromagnetic release, an action mechanism 2 and a trip lever 3;

[0021] There are three electromagnetic releases in total, which are two first electromagnetic releases 1 and one second electromagnetic release. The two first electromagnetic releases 1 are arranged on one side of the action mechanism, and the second electromagnetic release The release is arranged on the other side of the action mechanism;

[0022] See attached figure 2 , the first electromagnetic release 1 includes: iron core 1-1, yoke 1-2, spring 1-3, armature 1-4, bushing 1-5 and connecting rod 1-6; yoke 1-2 adopts Combination structure, the lower part is a convex structure with an opening, the upper part is two square structures on the left and right, the left square structure is provided with a T-shaped through hole along the axis, and the right square structure is provided with a counterbore...

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Abstract

The invention belongs to the technical field of low-voltage electric appliances, and specifically relates to a back-up protection device for a frame type circuit breaker. According to the technical scheme provided by the invention, the back-up protection device for the frame type circuit breaker comprises electromagnetic trips, an acting mechanism and a tripping rod; when large short-circuit current occurs in the circuit, the current induces an electromagnetic field in a magnetic loop consisting of an iron core, a magnetic yoke and an armature and the armature is pushed outwards under the action of electromagnetic force; the respective movements of two first electromagnetic trips and one second electromagnetic trip under the action of the electromagnetic force are converted from the translation of a push rod into the movement that an S-shaped rod rotates to press the front push rod, the front push rod squeezes a top plate of an L-shaped push rod downwards and the L-shaped push rod turns the tripping rod to break the tripping rod; when the short-circuit current disappears, each part is restored to be in an initial state under the action of a spring; and as the back-up protection of an intelligent trip, the back-up protection device can work timely when the intelligent trip of the breaker fails, so that reliable work of the fuse is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of low-voltage electrical appliances, and in particular relates to a backup protection device for a frame type circuit breaker. Background technique [0002] The frame circuit breaker is used for the main switch and generator protection of the power system, and its reliability requirement is very high. At present, all frame circuit breakers use intelligent releases to realize their protection functions, which have the advantages of high protection accuracy and convenient feature setting. However, the disadvantages of the smart release are: electronic components are prone to failure of protection characteristics due to the influence of electromagnetic interference; the main chip of the smart release needs to go through an initialization time of about 20ms at the initial stage of power-on, once a short circuit occurs during the initialization process, the circuit breaks The action speed of the device is relat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H71/24
Inventor 龚瑞良杨东升陈铭杰姚宇杰
Owner CHANGSHU GUORUI TECH CO LTD
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