Puffer circuit breaker with an overpressure valve
Puffer circuit-breaker having a pneumatically-locked semi-moving
Puffer switch having a two-volume break chamber
Puffer type circuit breaker with arcing chamber, auxiliary shunt
Puffer type circuit interrupter with improved blast valve and pe
Puffer type gas circuit breaker
Puffer type gas circuit breaker
Puffer-type circuit breaker and nozzle emitting gas with coaxial