Puffer type gas circuit breaker

Details Puffer type gas circuit breaker Puffer type gas circuit breaker

H - Electricity

01

H

306/230

H01H 33/74 (2006.01) H01H 33/24 (2006.01) H01H 33/57 (2006.01)

Patent

CA 1100164

ABSTRACT OF THE DISCLOSURE A puffer type gas circuit breaker in which a stationary arcing contact constituting the stationary part of a breaking unit is surrounded by an envelope including an annular shield element acting to relieve the electric field around the free end of the stationary arcing con- tact, and a gas passage extending in the axial direction of the stationary arcing contact is formed in the side portion of the envelope so that the greater portion of an arc extinguishing gas puffed toward the stationary arcing contact can be discharged through the gas passage. In the circuit breaker, a gas-shielding hood is disposed around the envelope for preventing the gas stream dis- charged from the gas passage from flowing directly straight.

310236

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