Gas circuit breaker

Details Gas circuit breaker Gas circuit breaker

1991-01-07

1992-10-27

Scott, J. R.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200148B, 200148R, H01H 3388

Patent

active

051591642

ABSTRACT:
A gas circuit breaker comprising a pair of contactors separable from each other, an insulating nozzle surrounding the contact portions of the contactors so as to guide a flow of gas, and a puffer chamber for compressing the gas in conjunction with a separating operation of the contact portions so as to supply the gas, guided by the insulating nozzle from the puffer chamber through exhaust passage passing through a hollow portion of the movable one of the contactors located within the insulating nozzle. The exhaust passages are formed between the puffer chamber and one of the contactors. An exhaust gas guide opens through an end of an exhaust gas guide between the contact closing time and the time about which a movable contactor and a fixed contactor are to be separated at an initial stage, close during the initial stage of the separating operation and open afterward exhaust ports formed at ends of the exhaust passages located on a downstream side of the gas flow, there by making it possible to reduce the flow resistance to the gas flow used for arc extinguishment in cooperation with an arc-extinguishing gas flow passing through a throat portion of the insulating nozzle, to reduce a force required for operation and to reduce the size of the gas circuit breaker.

REFERENCES:
patent: 3839613 (1974-10-01), Tsubaki et al.
patent: 4048456 (1977-09-01), Noeske
patent: 4070558 (1978-01-01), Stewart et al.
patent: 4163131 (1979-07-01), Perkins
patent: 5072084 (1991-12-01), Seki et al.
patent: 5079392 (1992-01-01), Tsukushi et al.
European Search Report EP 90 12 5737.

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