High-voltage crowbar circuit with cascade-triggered series ignit

Details High-voltage crowbar circuit with cascade-triggered series ignit High-voltage crowbar circuit with cascade-triggered series ignit

1979-01-03

1980-11-04

Moose, Jr., Harry E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

315 36, H02H 904

Patent

active

042323517

ABSTRACT:
A series string of ignitrons for switching a large current at high voltage to ground. Switching is initiated by means of a negative trigger pulse applied to the cathode of the lowest voltage level ignitron next to ground to draw ground current through diodes in the ignitor circuit. The trigger pulse is applied thereby to the next higher ignitron cathode and sequentially to the remainder of the ignitrons in the string through diodes in respective ignitor circuits. Full line voltage is held off of nonconducting diodes and ignitrons by means of varistors.

REFERENCES:
patent: 2575232 (1951-11-01), Parker
patent: 2928956 (1960-03-01), Jones
patent: 3087091 (1963-04-01), McFarland
patent: 3267331 (1966-08-01), Melhart
patent: 3339111 (1967-08-01), Possner
patent: 3418530 (1968-12-01), Cheever
patent: 3723820 (1973-03-01), Brown
patent: 3943427 (1976-03-01), Tolsov et al.
patent: 4023071 (1977-05-01), Fussell
patent: 4040000 (1977-08-01), Dwivedi
patent: 4054933 (1977-10-01), Praeg

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