Operating device for a contact device for a pre-insertion resist

Details Operating device for a contact device for a pre-insertion resist Operating device for a contact device for a pre-insertion resist

1975-09-08

1977-08-09

Macon, Robert S.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200 82B, H01H 3354

Patent

active

040412644

ABSTRACT:
For rapid on-off operation of a contact device for a pre-insertion resistor in a high voltage compressed gas circuit breaker, the operating device includes a piston movable in a cylinder and connected to a movable contact. The piston forms two spaces in the cylinder. A quick operating valve connects the first cylinder space alternately to a source of high pressure or to a low pressure space. The space on the other side of the cylinder can be connected through openings to a delay space which surrounds the cylinder in the form of a ring. A spring-mounted slide is provided in the cylinder for normally closing these openings but allowing them to open when the piston moves. The delay space is connected to the source of pressure fluid through a line containing a check valve which prevents outflow from the delay space.

REFERENCES:
patent: 2964605 (1960-12-01), Schulz
patent: 3715542 (1973-02-01), Grune et al.
patent: 3748418 (1973-07-01), Kawasaki

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