GAS CIRCUIT INTERRUPTERS

摘要

A gas circuit breaker of the puffer type provided with a puffer cylinder with one or more apertures that relieve the back-pressure created by the rapid expansion of the puffer chamber during the contact-closing-stroke. The pressure-relieving apertures are shaped and located so that they automatically open and close at predetermined positions of the movement of the puffer cylinder and the movable contact relative to the stationary piston, without the need of check valves.