Contactor device for circuit breaker and circuit breaker using same contactor device

摘要

[Problem] To obtain a configuration having an effect of increasing the external force working on an arc to achieve a shortening of commutation time through a simple configuration and without increasing the size of the device. [Solution] An arc-generation chamber is configured from main contactors provided on a stationary side and a mobile side, arc contactors provided on the stationary side and the mobile side, and side walls of an arc-extinction chamber. At least the side surface and the bottom surface of the arc-generation chamber are surrounded by insulation walls, leaving an opening in the direction of the arc-extinguishing chamber.