Gas blast circuit breaker

Details Gas blast circuit breaker Gas blast circuit breaker

1973-11-29

1976-03-02

Macon, Robert S.

Electricity: circuit makers and breakers

Liquid contact

Time delay

H01H 3370

Patent

active

039419622

ABSTRACT:
A gas blast circuit breaker has fixed and movable contact sets, the latter mounted on a cylinder slidable on a fixed piston to generate a gas blast on separation of the contact sets. Each contact set consists of radially inner and outer contacts, the inner contacts separating later than the outer. A gas blast nozzle mounted on the cylinder and between the radially inner and outer movable contacts has a throat downstream of the inner contact, communicating with the interior of the cylinder by way of an inner duct containing the inner contact, and an annular outer duct, so arranged that on separation of the contacts relatively cool fresh quenching gas is directed through the inner duct over the inner contact and arc.

REFERENCES:
patent: 3679851 (1972-07-01), Latour et al.
patent: 3786215 (1974-01-01), Mauthe

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