Electricity: circuit makers and breakers – Liquid contact – Time delay
Patent
1976-10-12
1980-08-26
Macon, Robert S.
Electricity: circuit makers and breakers
Liquid contact
Time delay
H01H 3388
Patent
active
042197112
ABSTRACT:
A puffer interrupter has two axially spaced movable pistons fixed to the movable contact. A fixed barrier is disposed between the two pistons and a further fixed barrier is positioned at the end of the cylinder chamber. The two fixed barriers form three variable volume chambers with the two movable pistons. As the interrupter is opened, the central chamber formed between the end movable piston and fixed barrier between the two pistons reduces in volume to generate an increasing pressure while the two volumes on either side of the central volume increase in volume to produce a decrease in pressure. Gas then flows axially through the separating contact from the decreased volume central chamber to the outer reduced-pressure chambers. An auxiliary piston is formed within the central chamber and can increase the central chamber volume when the pressure within the central chamber exceeds a given value due to blockage of the nozzle by high arc-generated pressures.
REFERENCES:
patent: 3588407 (1971-06-01), Frink
patent: 3786215 (1974-01-01), Mauthe
patent: 3987261 (1976-10-01), McConnell
patent: 3991292 (1976-11-01), Perkins
I-T-E Imperial Corporation
Macon Robert S.
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