Protective device for series capacitor

Details Protective device for series capacitor Protective device for series capacitor

1975-06-30

1977-03-15

Miller, J D

Electricity: electrical systems and devices

Safety and protection of systems and devices

Capacitor protection

361 15, H02H 716

Patent

active

040126676

ABSTRACT:
An overvoltage across each of N series capacitors is sensed by an individual overvoltage sensor through an associated current transformer and applied to a central control apparatus. Each capacitor is connected across an electric valve with a trigger electrode and also across a normally open circuit breaker. Another current transformer includes a secondary winding connected to the trigger valve electrode and a primary winding connected across a discharge circuit controlled by the central control apparatus. With an overvoltage developed across any capacitor, the discharge circuit discharges the electric valve and then closes the circuit breaker.

REFERENCES:
patent: 2207577 (1940-07-01), Buell
patent: 2664525 (1953-12-01), Diebold
patent: 3619721 (1971-11-01), Westendorp
patent: 3816800 (1974-06-01), Ringler et al.

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