Method and special tool for replacing circuit breaker contacts

Abstract

The invention provides a method and a special tool for replacing circuit breaker contacts and belongs to the power transformer and distribution equipment field. The method comprises integrally assembling a plurality of copper contact blades, a contact support and a fixed spring and enabling the assembly to sleeve the head part of a circuit breaker contact arm; by split assembling and overall installation in place and by virtue of a conical special tool, the fixed spring is evenly stressed in the assembling and placing process of a contact assembly and prevented from local deformation due to uneven stress on the spring, and therefore, even stress on each copper contact blade is guaranteed, and the contact assembly is convenient to assemble and the quality and speed of assembly can be guaranteed; the contact assembly can be assembled and replaced as a whole conveniently and quickly; potential accidents caused by poor contact and heating of the contacts can be avoided, the time for stopping a circuit breaker switchgear for inspection can be greatly shortened, and moreover, the operation labor intensity of a maintenance worker can be reduced and the personal safety of the maintenance worker also can be ensured. The method and the special tool can be widely applied to the repair and maintenance fields of the vacuum circuit breakers.

Description

technical field [0001] The invention belongs to the field of power transformation and distribution equipment, and in particular relates to a maintenance method and a maintenance tool for circuit breaker contacts. Background technique [0002] High-voltage circuit breakers are the most important control and protection equipment in power plants, substations and power systems. [0003] The existing VB series vacuum circuit breaker is a trolley circuit breaker, which is equipped with upper and lower moving contacts (this "moving" is relative to the corresponding fixed contacts in the switch cabinet, that is, the "static contact" described later) In terms of "contact", it means that the upper and lower moving contacts can "move" with the movement of the circuit breaker trolley), between the upper and lower moving contacts there is a The vacuum bubble of the circuit (commonly known as the vacuum interrupter) is equipped with upper and lower static contacts in the switch cabinet. ...

AI Technical Summary

Problems solved by technology

[0014] Due to the huge compression force of the fixed spring, when the installation operation requires personnel to cross positions, the operator's hands are often caught, and even bleeding accidents occur; at the same time, using a screwdriver to fiddle with and move the spring often results in local deformation of the spring. The multi-piece copper contact pieces on the contact frame are unevenly stressed, resulting in uneven conduction of the contact assembly as a whole, poor contact and heat generation of the contacts, and forming potential accident hazards

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