Disconnector switch for disconnecting a high-voltage arrester fr

Details Disconnector switch for disconnecting a high-voltage arrester fr Disconnector switch for disconnecting a high-voltage arrester fr

1996-04-16

1997-09-02

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Transformer protection

361 35, 324547, H02H 704

Patent

active

056638590

ABSTRACT:
An electric device, such as a transformer, has a tank and an arrester for protection against high voltage surges, the arrester being grounded to a wall of the tank. A switch is mounted in the tank wall for enabling the ground connection to be disconnected from outside the tank. The switch includes a shaft extending slidably through an opening in the tank wall. A gripping handle is mounted on an outer end of the shaft, and a spring washer is mounted on an inner end of the shaft. The spring washer is electrically connected to a discharge side of the arrester and is movable toward the wall and into electrically conductive relationship therewith in response to sliding of the shaft. By sliding the shaft in a direction moving the washer away from the wall, the electrical connection is broken. The handle is threadedly mounted to the shaft to be reversible between a first position holding the shaft in its switch closed position, and a second position for enabling the shaft to be slid to its switch open position.

REFERENCES:
patent: 3313983 (1967-04-01), Mallett et al.
patent: 4063298 (1977-12-01), Tornetta et al.
patent: 4743996 (1988-05-01), Book
patent: 4975797 (1990-12-01), Veverka et al.

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