Grounding switch gear device

Details Grounding switch gear device Grounding switch gear device

1994-04-12

1996-08-06

Kincaid, Kristine L.

High-voltage switches with arc preventing or extinguishing devic

Arc preventing or extinguishing devices

Air-current blowout

218 59, 218 57, H01H 3388

Patent

active

055435971

ABSTRACT:
A first puffer chamber is formed by a puffer cylinder having a substantially cylindrical flange portion and a shaft portion, and a fixedly disposed piston. The piston is formed in a cylindrical shape sealed with respect to an external space, and is constituted to be accommodated in the flange portion of the puffer cylinder at the circuit breaking position of the circuit breaking unit. The internal space of the piston is constituted as a second puffer chamber which is designed to communicate with the first puffer chamber. The gas accumulated in the second puffer chamber is continuously blown out toward between the electrodes, thereby prolonging an effective interruptable arc time span without increasing the size of the circuit interrupting unit and operating unit.

REFERENCES:
patent: 4440997 (1984-04-01), Garzon
patent: 4598188 (1986-07-01), Schotzau et al.
patent: 4992634 (1991-02-01), Thuries et al.
patent: 5001314 (1991-03-01), Thuries et al
patent: 5155314 (1992-10-01), Dufournet et al.

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