Mechanical interlock device for three-phase phase-change switch

Abstract

The invention relates to a mechanical interlock device for a three-phase phase-change switch. The mechanical interlock device comprises three phase moving core brackets, two small levers and a large lever, wherein the three phase moving core brackets are sequentially arranged; the front ends of three phase moving core rocker arm brackets are hinged with the top ends of the three phase moving core brackets correspondingly; the rear ends of the three phase moving core rocker arm brackets are jointly hinged with a moving core rocker arm bracket spindle; the centers of the two small levers are hinged with a bracket of the mechanical interlock device for the three-phase phase-change switch; the left end and the right end of one small lever are located on the surfaces of the first phase moving core rocker arm bracket and the second phase moving core rocker arm bracket correspondingly; the left end and the right end of the other small lever are located on the surfaces of the second phase moving core rocker arm bracket and the third phase moving core rocker arm bracket correspondingly; the left end and the right end of the large lever are located on the surfaces of the first phase moving core rocker arm bracket and the third phase moving core rocker arm bracket correspondingly; and when any phase moving core rocker arm bracket in the three phase moving core rocker arm brackets is lifted to be closed, the other two phase moving core rocker arm brackets are pressed to be opened by the small levers or the large lever. The mechanical interlock device is simple in structure, good in action reliability, low in cost and convenient to maintain.

Description

technical field [0001] The invention relates to a voltage electrical switch, in particular to a mechanical interlock device for a three-phase commutation switch. Background technique [0002] At present, some low-voltage contactor-type commutation switches at home and abroad use electrical interlocks, which have poor operational reliability. There are also some three-phase reversing switches that use mechanical interlock, but the structure of the mechanical interlock is relatively complicated and the cost is high. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a mechanical interlocking device for a three-phase reversing switch with simple structure, good operation reliability, low cost and convenient maintenance. [0004] The mechanical interlocking device of the three-phase reversing switch of the present invention comprises the first phase moving core support, the second phase moving core support and the thir...

AI Technical Summary

Problems solved by technology

[0002] At present, some low-voltage contactor type commutation switches at home and abroad adopt electrical interlocking, which has poor operation reliability.

There are also some three-phase reversing switches that use mechanical interlocks, but the structure of the mechanical interlocks is relatively complicated and the cost is high

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