Power supply for ground fault circuit interrupter

Details Power supply for ground fault circuit interrupter Power supply for ground fault circuit interrupter

1994-01-31

1996-04-23

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

361 18, 361 42, H02H 300

Patent

active

055109454

ABSTRACT:
A ground fault interruption circuit detects a ground condition associated with a load in an electrical distribution system and disconnects the load in response to a ground fault condition. The circuit includes a ground fault detector connected to receive a ground fault imbalance signal and operative in response to a power signal, having specified voltage and current levels, to provide a trigger signal to disconnect the load from the system when the imbalance exceeds a certain level. A regulated power supply circuit a substantially constant current and voltage signal to the detector to minimize excess power to the detector and heat loss. The power supply includes a start up and storage portion and a constant current supply portion.

REFERENCES:
patent: 4342974 (1982-08-01), Nakano et al.
patent: 4428019 (1984-01-01), Howell
patent: 4568899 (1986-02-01), May et al.
patent: 4609898 (1986-09-01), Seymour et al.
patent: 4641217 (1987-02-01), Morris et al.
patent: 5258732 (1993-11-01), Marquardt
patent: 5260676 (1993-11-01), Patel et al.

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