Gas-blast electrical circuit breaker

Details Gas-blast electrical circuit breaker Gas-blast electrical circuit breaker

1989-12-27

1992-03-10

Scott, J. R.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200148R, H01H 3388

Patent

active

050951831

ABSTRACT:
A pole-unit of a gas-blast electrical circuit breaker comprises a tranverse partition made of injected insulating plastic material which at the same time performs guiding of the movable contact which passes through it. The injected material part bears an O-ring ensuring tightness with the casing and a one-way check valve of gas flow orifices arranged in the transverse partition. The gas-blast piston securedly united to the movable contact is also made of injected material and it comprises housing and clipping means of the puffer nozzle securedly fixed to the piston. A scraper seal in the form of a split segment is housed in a circumferential groove arranged in the injected part of the piston. The electrical connection between the movable contact rod and a flexible current supply insert is achieved by a braided strip extending in the form of a half-loop in a transverse plane to the pole-unit.

REFERENCES:
patent: 3988554 (1976-10-01), Graf et al.

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