Encapsulated high voltage switching device

Details Encapsulated high voltage switching device Encapsulated high voltage switching device

1976-02-23

1979-04-17

Macon, Robert S.

Electricity: circuit makers and breakers

Liquid contact

Time delay

H01H 3366

Patent

active

041502701

ABSTRACT:
An interrupter includes a vacuum enclosure for a set of high voltage contacts and end contact assemblies are secured to the end walls. High voltage terminals are connected to the contact assemblies. A solid insulating shell intimately attaches to the vacuum enclosure and extends axially therefrom to enclose the contact assemblies, with a contact shaft passageway in one end of the shell. One of the contact assemblies includes a movable contact shaft extending through the passageway in the insulating shell to an operating mechanism for rapid opening of the contacts. The passageway is sealed at the outer end to the shaft with a rolling diaphragm and defines a chamber encompassing the contact assembly. A deaerated insulating oil fills the chamber and significantly increases the impulse voltage rating of the interrupter. The chamber may alternatively be filled with a non-pressurized sulfur hexafluoride or other suitable gaseous medium to prevent contamination. A pressurized gaseous medium may also be used and increases the impulse voltage capability of the unit. If a pressurized medium is employed, the diaphragm is spring loaded to prevent ballooning.

REFERENCES:
patent: 3123698 (1964-03-01), Waterton
patent: 3471669 (1969-10-01), Curtis
patent: 3855435 (1974-12-01), Himi
patent: 3956721 (1976-05-01), Link

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