Gas insulated interrupter

Details Gas insulated interrupter Gas insulated interrupter

1997-02-07

1998-07-21

Dang, Khanh

High-voltage switches with arc preventing or extinguishing devic

Arc preventing or extinguishing devices

Air-current blowout

218 59, 218 60, H01H 3388

Patent

active

057837910

ABSTRACT:
A puffer-type gas insulated interrupter has stationary and moving main contacts, stationary and moving arc contacts for discharging an arc, and a puffer cylinder for electric arc suppression. At the time of current interruption, the puffer cylinder moves together with the moving arc contact to blow electric insulation gas to the arc between the stationary and moving arc contacts. The blown gas flows between the arc contacts and is then discharged through a gas discharge passage. A duplex puffer chamber is provided in the gas discharge passage near the moving arc contact. The duplex puffer chamber holds or confines the insulation gas, and causes the same to be heated and pressurized by the arc and to blow out toward the stationary arc contact. A gas flow from the duplex puffer chamber cooperates with a gas flow from the puffer cylinder to effectively suppress the arc, and therefore the gas pressure in the puffer cylinder can be reduced, so that an operating force for the interrupter can be reduced.

REFERENCES:
patent: 3991292 (1976-11-01), Perkins
patent: 4665289 (1987-05-01), Yanabu et al.
patent: 5229561 (1993-07-01), Seki et al.
patent: 5543597 (1996-08-01), Watanabe et al.

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