Ground fault circuit interrupting device with improved coordinat

Details Ground fault circuit interrupting device with improved coordinat Ground fault circuit interrupting device with improved coordinat

1981-05-04

1982-09-07

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

361113, 361 86, H02H 333

Patent

active

043487084

ABSTRACT:
In an integrated circuit for a ground fault circuit interrupting device, a power supply voltage regulator is utilized to turn on a double grounded neutral excitation oscillator and to inhibit trip initiating thyristor triggering while the half-wave rectified supply voltage is in regulation and, as the supply voltage goes into regulation near the beginning of each alternate half-cycle, condition a comparator to issue a thyristor triggering pulse if an integrated fault signal voltage has achieved an established trip threshold level.

REFERENCES:
patent: 3936699 (1976-02-01), Adams
patent: 3973171 (1976-08-01), Howell
patent: 4027240 (1977-05-01), Meade
patent: 4216516 (1980-08-01), Howell

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