Abstract:

In order to improve the electrical endurance of AC contactor,combined with the arc extinguishing principle and arc extinguishing method,three different structures of arc extinguishing systems are proposed.The experimental results show that the setting of arc channel on the cover plate of the arc extinguishing chamber,the upward inclination angle of the arc striking plate and the bending angle of the last arc-extinguishing grid can have an important impact on the electrical endurance of AC contactor.This has a certain reference significance for the arc extinguishing system design of AC contactor.

Key words: AC contactor, electrical endurance, arc extinguishing chamber, arc channel