Gas-blast circuit breaker

Details Gas-blast circuit breaker Gas-blast circuit breaker

1984-05-29

1985-12-03

Macon, Robert S.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200148R, H01H 3388

Patent

active

045567670

ABSTRACT:
A gas-blast breaker with two contact members which are movable relative to one another. Each contact member is provided with a respective sparking contact. The contacts communicate with a cylindrical compression chamber whose volume varies as a function of the movement of the contact members and which is filled pressurized gas. A channel leading into a quenching zone between the sparking contacts extends into a first one of the two end faces of the compression chamber. A second one of the two end faces is bounded by a piston which is displaceable along the cylinder axis of the compression chamber and which is subjected to the action of a tensioned spring. The circuit breaker is suited for reliably interrupting both small and large currents, with a comparatively weak and simple drive mechanism for the movable contact member. The piston interacts with a fixed stop which is arranged such that the movement of the piston which is subjected to the action of the tensioned spring is blocked, below a predetermined first gas pressure in the compression chamber, against the movement of one of the contact members which is moved upon the occurrence of a breaking operation in the circuit breaker.

REFERENCES:
patent: 2913559 (1959-11-01), Cromer
patent: 3331935 (1967-07-01), Milianowicz
patent: 3914569 (1975-10-01), McConnell et al.
patent: 4103131 (1978-07-01), Graf et al.
patent: 4445018 (1984-04-01), Holmgren

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