Multipole ground fault circuit interrupter with trip level adjus

Details Multipole ground fault circuit interrupter with trip level adjus Multipole ground fault circuit interrupter with trip level adjus

1978-09-13

1980-06-17

Moose, Jr., Harry E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

H02H 328

Patent

active

042086884

ABSTRACT:
Multipole ground fault circuit interrupter apparatus with a compensation network for maintaining a constant trip level despite less than all power poles being energized. The compensation network has matched resistors respectively connected to each power pole and an additional resistor connected to the common point of the matched resistors in a branch passing through the differential current transformer core from the load side to the supply side and connected to the neutral conductor, producing a desensitizing current when less than all poles are energized.

REFERENCES:
patent: 3604982 (1971-09-01), McDonald
patent: 3676737 (1972-07-01), Garzon
patent: 3852642 (1974-12-01), Engel et al.
patent: 3999103 (1976-12-01), Misencik et al.
patent: 4015169 (1977-03-01), Misencik
patent: 4056837 (1977-11-01), Misencik et al.
patent: 4080640 (1978-03-01), Elms et al.

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