Series multiple nozzles for gas blast circuit interrupter

Details Series multiple nozzles for gas blast circuit interrupter Series multiple nozzles for gas blast circuit interrupter

1982-01-04

1984-09-11

Macon, Robert S.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200148D, 200148C, H01H 3370

Patent

active

044711859

ABSTRACT:
A flow nozzle for a circuit interrupter includes a plurality of at least two throat regions which permit at least two transitions from subsonic to supersonic flow in the main nozzle flow channel. Very high speed photographs made of the operation of arc interruption devices of the type considered herein have shown that the greatest amount of arc cooling occurs in transition regions between subsonic and supersonic gas blast flow. Accordingly, the ability of arc interruption devices to quickly extinguish resulting arcs between electrodes in the main flow channel is significantly enhanced by the presence of a plurality of throat regions. These throat regions may be provided by shaped constructions or by bypass collars disposed in the downstream position of the main flow channel. The instant invention is applicable both to conventional single-flow and dual-flow interrupter nozzle designs.

REFERENCES:
patent: 3842226 (1974-10-01), Yoon

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