A mechanical interlocking device for a low-voltage circuit breaker

Abstract

The invention relates to a mechanical interlocking apparatus for low-voltage circuit breakers. The mechanical interlocking apparatus is characterized by comprising a first interlinking mechanism, a second interlinking mechanism and a third interlinking mechanism that are correspondingly mounted on side plates of a first circuit breaker, a second circuit breaker and a third circuit breaker respectively; a first upper bracket, a second upper bracket, a third upper bracket, a first lower bracket, a second lower bracket and a third lower bracket are fixedly connected with the respective first interlinking mechanism, the second interlinking mechanism and the third interlinking mechanism correspondingly; the two ends of the corresponding guide sleeves on six soft steel wire ropes are fixed on the upper and lower brackets of the three interlinking mechanisms in a crossed manner; the steel wire ropes can pull upper and lower levers; therefore, when three circuit breakers are in operating, the last circuit breaker cannot be switched on after the other two circuit breakers are switched on; the mechanical interlocking apparatus is relatively less in required parts, simple in structure, convenient to detach and adjust, accurate in actions, high in reliability and high in universality; and the shortcomings of large error range, inaccurate travel, unreliable actions and the like existing in the prior art for realizing the same functions are effectively overcome, so that the mechanical interlocking apparatus is high in industrial use value.

Description

technical field [0001] The invention belongs to an additional device of a circuit breaker, in particular to a mechanical interlock device of a low-voltage circuit breaker. Background technique [0002] In the market research, the customer proposed that three circuit breakers can be interlocked to achieve any two-in-one-off, that is, any two circuit breakers can be closed at the same time, but the third circuit breaker cannot be closed. However, the function of the mechanical interlock device of the existing DW45 circuit breaker does not cover this two-in-one-point function. There are two-in-one points on the market, the soft steel wire rope travels half a stroke, the stroke is inaccurate, and the action is unreliable. Contents of the invention [0003] In order to solve the technical problems in the known technology, the present invention provides a mechanical interlock device of a low-voltage circuit breaker that can guarantee two-in-one-off among three circuit breakers....

AI Technical Summary

Problems solved by technology

However, the existing DW45 circuit breaker's mechanical interlock function does not cover this two-in-one-point function

There are two-in-one points on the market, the soft steel wire rope travels half a stroke, the stroke is not accurate, and the action is unreliable

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