Switchgear

Details Switchgear Switchgear

1987-06-08

1988-11-22

Macon, Robert S.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200147A, 200148B, H01H 3318

Patent

active

047867701

ABSTRACT:
A switchgear comprises in a housing containing an arc extinguishing gas, a pair of separable contacts defining therebetween an arcing region in which an electric arc is generated when the contacts are separated. A cylindrical wall and an insulating nozzle are provided for defining a gas storage chamber around the stationary contact communicated with the arcing region for storing the arc extinguishing gas increased in pressure by heat from the arc. The insulating nozzle defines an opening through which the movable contact movably extends and through which the pressurized arc extinguishing gas flows. Around the arcing region a magnet is disposed for generating a magnetic field in the opening of the gas storage chamber for rotating and elongating the electric arc generated in the arcing region upon current interruption.

REFERENCES:
patent: 3892461 (1975-07-01), Keto
patent: 4273977 (1981-06-01), Kii
patent: 4500762 (1985-02-01), Yoshizumi
patent: 4652708 (1987-03-01), Okuno et al.
patent: 4687890 (1987-08-01), Yamamoto et al.
patent: 4688136 (1987-08-01), Yamauchi

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