Full automatic electric shock protector apparatus

Details Full automatic electric shock protector apparatus Full automatic electric shock protector apparatus

1987-03-06

1988-11-08

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

361 44, 361 45, 361 50, H02H 512, H02H 352

Patent

active

047837136

ABSTRACT:
An electric shock protector apparatus includes a circuit for detecting an electric shock current signal which has a frequency substantially higher than the line frequency of a power distribution system. The current of the power system is passed through a filter which eliminates the power supply frequency and produces a signal indicative of an electric shock current. The electric shock current signal is passed to positive and negative half-cycle operation signal circuits which transmit signals to a logic gate for operating a relay to disconnect the power source from the line conductors.

REFERENCES:
patent: 3700966 (1972-10-01), Morrow
patent: 3891895 (1975-06-01), Wittlinger
patent: 3938006 (1976-02-01), Gadwal et al.
patent: 4080640 (1978-03-01), Elms et al.
patent: 4114089 (1978-09-01), Ahmed
patent: 4200897 (1980-04-01), Dawley
patent: 4203142 (1980-05-01), Lee
patent: 4247879 (1981-01-01), Elms et al.
patent: 4441134 (1984-04-01), Lewiner

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