Circuit breaker action speed detection method and device, and circuit breaker

Abstract

The invention discloses a method for detecting the action speed of a circuit breaker. The switching-on and / or switching-off process of the circuit breaker is linearly mapped into the process that an anti-dazzling screen moves along a preset track through the anti-dazzling screen which is mechanically coupled with a contact system of the circuit breaker; pulse signals generated by the shading sheetthrough the photoelectric switches in the closing and / or opening process of the circuit breaker are obtained through the photoelectric switches arranged at different positions on the preset track; and the pulse signals are processed to obtain the speed information when the anti-dazzling screen passes through a plurality of different segmentation intervals, and finally fitting of the speed information is carried out to obtain the speed change condition of the closing and / or opening process of the circuit breaker. The invention further discloses a circuit breaker action speed detection device and a circuit breaker. Compared with the prior art, The method is advantaged in that real-time monitoring can be carried out on the speed change conditions of different stages in the switching-on and switching-off process of the circuit breaker, implementation is easy, and cost is low.

Description

technical field [0001] The invention relates to a method for detecting the operating speed of a circuit breaker. Background technique [0002] At present, the operating mechanism of the circuit breaker mostly adopts the spring energy storage type, and there is a relatively complicated mechanical structure to drive the main contact to perform closing and opening movements. The speed when the circuit breaker closes and opens cannot reach the expected value, resulting in deterioration or degradation of the performance of the circuit breaker, which cannot meet the requirements for use and protection. At this time, it is necessary to detect the closing and opening speed of the circuit breaker. When the closing and opening speed of the circuit breaker does not reach the preset range, it is understood that the health of the circuit breaker is poor, and the circuit breaker needs to be repaired or maintained. and so on. The existing circuit breaker action speed detection technology...

AI Technical Summary

Problems solved by technology

However, this detection scheme can only obtain a rough overall speed of closing and opening, and cannot obtain more detailed speed change information at different stages in the closing and opening process, and cannot provide a more detailed and accurate basis for health monitoring

Images