Circuit interrupter arrangement

Details Circuit interrupter arrangement Circuit interrupter arrangement

1996-04-22

1998-11-10

Friedhofer, Michael A.

High-voltage switches with arc preventing or extinguishing devic

Arc preventing or extinguishing devices

Vacuum

218154, 218 12, H01H 3366

Patent

active

058347259

ABSTRACT:
A vacuum recloser in which an isolator switch is incorporated in series with the vacuum interrupter and is driven by the same actuator. The isolator must only be operated when the vacuum switch is open and no arc current remains. This is ensured in one of two ways (a) by providing a significant lost motion in the isolator drive, giving, say, 20 milliseconds between opening of the vacuum contacts and opening of the isolator contacts, and (b) by latching the isolator drive against opening, compressing a spring against the latch by the actuator attempting to open the isolator, and tripping the latch by a solenoid responsive to lock-out conditions.

REFERENCES:
patent: 3769478 (1973-10-01), Weston et al.
patent: 4458119 (1984-07-01), Hashimoto et al.
patent: 4484044 (1984-11-01), Yoshigae
patent: 4484046 (1984-11-01), Neuhouser
patent: 4727229 (1988-02-01), Hodkin
patent: 4814559 (1989-03-01), Stegmuller

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