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Method for Detecting Arc Reignition of Circuit Breaker Breaking Process Based on Radiated Electromagnetic Wave

Aiming at the deficiencies of the circuit breaker arc reignition detection method, a method based on the electromagnetic wave signal radiated during the breaking process of the circuit breaker is proposed to detect whether it is re-ignited. The detection system used in this method is introduced. The laboratory detection platform of this method is built. The difference of the radiated electromagnetic wave signal during the arc reignition of the circuit breaker is studied, and the arc reignition instant shooting is performed by the high-speed camera. The research results show that the radiated electromagnetic wave is generated at the moment of reignition of the circuit breaker, and the electromagnetic wave is not radiated during the subsequent arc stable combustion process; when the distance between the contacts is short, the arc re-ignites and radiates the electromagnetic wave at the same time each current zero crossing point, and when the distance increases, the arc extinguishes when the current crosses zero and does not reignite.