Electricity: electrical systems and devices – Safety and protection of systems and devices – Capacitor protection
Patent
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.
Ishida Yotsuo
Kuwahara Hiroshi
Adams Bruce L.
Burns Robert E.
Lobato Emmanuel J.
Miller J D
Mitsubishi Denki & Kabushiki Kaisha
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