Gas-blast switch

Details Gas-blast switch Gas-blast switch

1978-11-20

1980-10-28

Macon, Robert S.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200150G, H01H 3388

Patent

active

042309204

ABSTRACT:
Within a gas tight insulating housing of a gas-blast switch there are arranged a fixed contact surrounded by a blast chamber, a movable contact and a blast nozzle movable together with said movable contact. The blast nozzle is connected to a pump device containing a pump cylinder movable along with the movable contact. The pump cylinder is displaceable upon a stationary piston. Means are coupled with the pump cylinder and which means, during the course of the cut-off stroke of the gas-blast switch, are impinged by the extinguishing or quenching gas heated by the arc and augment the operation of the pump device, and thus, the cut-off movement. The means coupled with the pump cylinder incorporate an impact plate which bridges the substantially jacket or shell-shaped blast chamber between the pump cylinder and the inner wall of the insulating housing preferably up to the region of a ring-shaped or annular gap. The pressure wave emanating from the expanding, heated extinguishing gas which is preferably deflected by deflection blades impinges the impact plate which, in turn, augments the cut-off movement by means of the pump cylinder.

REFERENCES:
patent: 2459599 (1949-01-01), Strom
patent: 3524958 (1970-08-01), Frink
patent: 3739125 (1973-06-01), Noeske
patent: 3987261 (1976-10-01), McConnell
patent: 4182942 (1980-01-01), Koyanagi et al.

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