Puffer interrupter with main and auxiliary pistons and common cy

Details Puffer interrupter with main and auxiliary pistons and common cy Puffer interrupter with main and auxiliary pistons and common cy

1976-09-20

1978-07-25

Macon, Robert S.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200148F, H01H 3388

Patent

active

041031318

ABSTRACT:
A puffer-type interrupter for a circuit breaker has a stationary piston received in a movable cylinder which is connected to the movable contact of the interrupter, and which also carries a nozzle for producing a blast of gas through the separating contacts of the interrupter when the cylinder is moved over the piston. An auxiliary piston is slidably mounted relative to the main piston, and mechanism is provided to connect the two pistons together when the interrupter contacts are closed, and to connect the auxiliary piston to the movable cylinder after the contacts have separated. The main pressure chamber within the cylinder and the fixed piston is connected to an auxiliary pressure chamber disposed between the main piston and the auxiliary piston in such a manner that, as the separating contacts reach an optimum separation for contact interruption, the pressure within the main cylinder can drop to a preselected value by pressure flow into the intermediate chamber between the main piston and auxiliary piston, thereby to control the force characteristic required for the operation of the interrupter.

REFERENCES:
patent: 2913559 (1959-11-01), Cromer
patent: 3955057 (1976-05-01), Dabringhausen

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