Buffer for circuit breaker

Abstract

The invention relates to a bumper for a breaker. A support is arranged at one end of a mounting base, one end of a buffer bearing plate is arranged on the support through a pin, the other end of the mounting base is provided with a connecting rod, the other end of the buffer bearing plate is provided with a through hole and movably connected with the connecting rod through the through hole, an upper limit block for limiting moving range of the buffer bearing plate is arranged on the connecting rod, a pressure spring and a pressure head are arranged between the support and the connecting rod, the lower end of the pressure spring presses on the mounting base, the upper end of the pressure spring is connected with the pressure head which is connected on the buffer bearing plate, and a limit groove matched with a driving rod on the breaker is arranged on the upper surface of the middle portion of the buffer bearing plate. The bumper is simple in structure; via buffering and positioning during opening of the circuit breaker, the opening of the breaker is simply and effectively controlled to rebound within a safety range through, so that mechanical property parameters of the breaker are guaranteed, 'reignition' phenomenon is avoided, service life of the breaker is prolonged, reliable power supply is guaranteed.

Description

technical field [0001] The invention relates to a buffer for a circuit breaker, in particular to a buffer installed on an outdoor high-voltage vacuum circuit breaker, and belongs to the technical field of electric equipment. Background technique [0002] The realization of the opening and closing action of the circuit breaker comes from the operating mechanism. When the circuit breaker is opened, in order to meet the needs of the vacuum interrupter to extinguish the arc, the corresponding opening speed is relatively high. However, when the opening speed is high, the opening process It is extremely difficult to control the overshoot rebound in the middle. Excessive overshoot and rebound during opening will cause the circuit breaker to "reignition" the contacts of the arc extinguishing chamber when it is opening, which will seriously affect the life of the arc extinguishing chamber and the life of the circuit breaker, and even cause serious electrical accidents. Hidden danger...

AI Technical Summary

Problems solved by technology

[0002] The realization of the opening and closing action of the circuit breaker comes from the operating mechanism. When the circuit breaker is opened, in order to meet the needs of the vacuum interrupter to extinguish the arc, the corresponding opening speed is relatively high. However, when the opening speed is high, the opening process Medium overshoot rebound control is extremely difficult

Excessive overshoot and rebound during opening will cause the circuit breaker to "reignition" the contacts of the arc extinguishing chamber when it is opening, which will seriously affect the life of the arc extinguishing chamber and the life of the circuit breaker, and even cause serious electrical accidents. Hidden dangers for the reliability of power supply

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