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Because of the contact material's evaporation and ejection of some metal particles out of the contact gap during the flow of the vacuum arc, the contact surface may exhibit some erosion after each operation of vacuum circuit breakers. In this study, the insulation properties were investigated for vacuum interrupters with the rated voltage about 10 kV operating voltage after short circuit current interruption...
The diagnosis was investigated by using the acceleration measurement for mechanical failure and degradation of a SF6 gas circuit breaker (GCB). The mechanical model GCB was fabricated to produce similar acceleration characteristics to a real GCB. The MEMS (micro electro-mechanical system) sensor was adopted for the purpose of confirming its applicability with the well-established piezoelectric accelerometer...
With an aim of applying a MEMS (micro electrical mechanical system) acceleration sensor as a diagnosis tool for a mechanical degradation of a SF6 gas circuit breaker, we investigated the fundamental characteristics. It is confirmed that the MEMS acceleration sensor with a maximum acceleration number of 250 G and a frequency band width up to 400 Hz can be applied to measure an acceleration number of...
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