Ground fault circuit interrupting device with improved thyristor

Electricity: electrical systems and devices – Safety and protection of systems and devices – Ground fault protection

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361113, H02H 333

Patent

active

043452892

ABSTRACT:
A fault signal integrating capacitor and a comparator responsive to an integrated fault signal voltage are connected in feedback circuit fashion such as to provide for the generation of a succession of thyristor gate triggering pulses to insure reliable current activation of a trip solenoid acting to effect separation of circuit interrupting contacts.

REFERENCES:
patent: 2953738 (1960-09-01), Bright
patent: 3852642 (1974-12-01), Engel
patent: 3973171 (1976-08-01), Howell
patent: 4180841 (1979-12-01), Engel
patent: 4216516 (1980-08-01), Howell
patent: 4290004 (1981-09-01), Smith

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