Protection circuit for capacitive ballast

Details Protection circuit for capacitive ballast Protection circuit for capacitive ballast

1982-09-27

1984-12-11

Moose, Jr., Harry E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

361101, H02H 308

Patent

active

044881991

ABSTRACT:
A protection circuit for a capacitively ballasted load provides decreased load current in the event of a circuit arc. The A.C. load current is measured at a time shortly after a load current zero crossing; if a non-zero load current is present, the load is operating normally and no action is taken, whereas if the load current remains at an essentially zero magnitude, indicative of circuit arcing conditions, normal load operation is inhibited.

REFERENCES:
"Zero-Crossing Detector Circuits"-Armstrong Mullard Technical Communications, No. 132, 10/1976.

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