Hydraulic or pneumatic drive for actuating the movable switch co

Electricity: circuit makers and breakers – Liquid contact – Time delay

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200 82B, H01H 3328

Patent

active

047883910

ABSTRACT:
A hydraulic or pneumatic drive for actuation of a movable switch contact of a medium and/or high-voltage power switch, especially an SF6-gas-insulated high-voltage power switch, includes a drive piston coupled to the movable switch contact. Fluid is delivered under pressure to the drive piston from a fluid reservoir configuration in order to perform one switching cycle having a given number of required switching operations. The fluid reservoir configuration has the given number of mutually separate independently acting storage chambers each having an energy content sufficient for a required switching operation.

REFERENCES:
patent: 4251701 (1981-02-01), Meyer
patent: 4348565 (1982-09-01), Yeckley et al.
patent: 4581510 (1986-04-01), Bischofberger et al.
patent: 4730092 (1988-03-01), Eggert et al.

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