Electrical circuit breaker with self-extinguishing expansion and

Details Electrical circuit breaker with self-extinguishing expansion and Electrical circuit breaker with self-extinguishing expansion and

1990-03-15

1991-10-15

Scott, J. R.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200147R, 200148R, H01H 33915, H01H 944, H01H 3318

Patent

active

050576550

ABSTRACT:
An inside of tubular contacts of a self-extinguishing expansion SF.sub.6 -gas circuit breaker including guiding ribs arranged to oppose any vortex-effect swirling gas flow between a first extinguishing chamber and a second expansion chamber. The presence of these ribs improves the dielectric withstand of the circuit breaker, and prevents any arc restriking inside the contacts.

REFERENCES:
patent: 4697055 (1987-09-01), Walter et al.
patent: 4900882 (1990-02-01), Bernard et al.

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