Electricity: electrical systems and devices – Safety and protection of systems and devices – Capacitor protection
Patent
1982-06-11
1984-11-13
Salce, Patrick R.
Electricity: electrical systems and devices
Safety and protection of systems and devices
Capacitor protection
361 94, 361 96, H02H 716
Patent
active
044829302
ABSTRACT:
A non-linear resistor assembly protecting equipment such as series capacitors is itself protected by a bypass spark gap, the firing of which is produced by a digitized pulse train, each pulse of which indicates a known increment of energy input to the varistors and is processed by counters and logic gates to achieve an initiating firing pulse upon the occurrence of a predetermined number of pulses indicating the energy input has reached predetermined limits within a given time period. The initial firing pulse is further processed through stages including semiconductor device switching, trigger spark gap firing and energy dumping from an energy storage capacitor into the elements of the main bypass spark gap.
REFERENCES:
patent: 4174496 (1979-11-01), McFall et al.
patent: 4174529 (1979-11-01), Hamann
patent: 4219860 (1980-08-01), DePuy
patent: 4257004 (1981-03-01), Miller
patent: 4259704 (1981-03-01), Hamann
patent: 4327391 (1982-04-01), Grzebielski
patent: 4379986 (1983-04-01), Baxter et al.
IEEE Paper 80 SM 694-0; 1980, by Hamann et al.; pp. 1-9, "A Zinc Oxide Varistor Protective System for Series Capacitors".
Grove, Jr. Louis C.
Miller Robert C.
Oates Robert M.
Peterson Charles A.
Salce Patrick R.
Telfer G. H.
Westinghouse Electric Corp.
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