Permanent magnet vacuum circuit breaker capable of monitoring contact abrasion in vacuum arc-extinguishing chamber on line

Abstract

The invention discloses a permanent magnet vacuum circuit breaker capable of monitoring contact abrasion in a vacuum arc-extinguishing chamber on line, and relates to the field of permanent magnet vacuum circuit breakers, and the permanent magnet vacuum circuit breaker can directly indicate the abrasion thickness of a contact, is visual in expression mode and accurate in monitoring result, and also has the technical effects of being simple in structure, low in price, convenient to install and use and the like. A display window device is provided with a pointer fixed at the outer ring of the display shaft, and the pointer is connected with the insulating pull rod through a connecting structure between main body transmission and indirect transmission, so that the pointer can synchronously move along with the insulating pull rod, and the scale at the panel is changed along with the increase of the abrasion of the contact of the arc extinguishing chamber of the circuit breaker; whether theabrasion condition of the contact of the vacuum circuit breaker reaches a critical value or not is judged through the scale position of the pointer on the display window device; and compared with similar products, the circuit breaker has the characteristics of simple structure, direct and convenient viewing, strong application expansibility, high cost performance and the like.

Description

technical field [0001] The invention relates to the field of permanent magnet vacuum circuit breakers, in particular to a permanent magnet vacuum circuit breaker with on-line monitoring of contact wear in a vacuum interrupter chamber. Background technique [0002] The vacuum circuit breaker adopts the indoor permanent magnet high-voltage vacuum circuit breaker, and the unique permanent magnet operating mechanism with a life of 100,000 times makes the vacuum circuit breaker more suitable for frequent operation; its unique design of the insulating rod and the operating mechanism enables it to be online Detect the wear thickness of the contacts in the three-phase vacuum interrupter, so as to determine the service life of the vacuum interrupter, and change the "regular maintenance" of the existing circuit breaker into "condition maintenance". [0003] The circuit breaker is one of the key equipment of the power system, and its operating status has a great influence on the reliab...

AI Technical Summary

Problems solved by technology

According to statistics, 10% of circuit breaker failures are caused by incorrect maintenance, and the overhaul of the circuit breaker completely disintegrates, which is a waste of time and expensive

Moreover, disassembly and reassembly will cause many new defects. In the current relatively conservative planned maintenance, the maintenance lacks certain pertinence

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