Ballasts with built-in ground-fault protection

Details Ballasts with built-in ground-fault protection Ballasts with built-in ground-fault protection

1984-08-13

1986-01-07

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

361 42, 315307, H02H 333

Patent

active

045637199

ABSTRACT:
An inverter-type ballast has built-in differential current transformer operative to sense any substantive difference in the currents flowing from each of its two output terminals. If a substantive difference exists for more than just a brief period, a trigger circuit operates to disable the inverter, thereby to remove voltage from the output terminals.

REFERENCES:
patent: 3641393 (1972-02-01), Florance et al.
patent: 3662216 (1972-05-01), Hildebrant
patent: 3683923 (1972-08-01), Anderson
patent: 4053813 (1977-10-01), Kornrumpf et al.

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