Nozzle for a puffer-type circuit breaker

Details Nozzle for a puffer-type circuit breaker Nozzle for a puffer-type circuit breaker

H - Electricity

01

H

306/230

H01H 33/91 (2006.01) H01H 33/04 (2006.01) H01H 33/70 (2006.01)

Patent

CA 1161480

RD-11524 ABSTRACT OF THE DISCLOSURE A puffer-type circuit breaker is provided with a nozzle of insulating material having a section downstream of the nozzle throat designed to optimize arc cooling by a high speed flow of insulating gas passing over the arc. The nozzle design prevents excessive ablation of nozzle material by the arc and reduces blocking of the nozzle by the moving electrode during circuit interruption. The nozzle includes a generally conically-shaped upstream section, a throat section and a generally bell-shaped downstream section.

378129

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