Electricity: electrical systems and devices – Safety and protection of systems and devices – Ground fault protection
Patent
1981-05-11
1982-11-09
Eisenzopf, Reinhard J.
Electricity: electrical systems and devices
Safety and protection of systems and devices
Ground fault protection
361 42, 361 50, H02H 316
Patent
active
043588093
ABSTRACT:
A personnel protection circuit for electrical supply systems comprises a normally closed switch connected between a source of electric power and a load. Two parallel conductors are connected between the switch and the load, and include a control circuit having a current unbalance detector for detecting current unbalance between the two conductors. Upon detection of such current unbalance, the normally closed switch is opened thereby disconnecting the electrical supply. Such control circuit devices may be included in both lines of the electrical supply system between the source and the load, or alternatively, further control circuit devices may be provided at both the source end and the load end of the parallel conductors.
REFERENCES:
patent: 3579037 (1971-05-01), Hackman
Briody Thomas A.
Eisenzopf Reinhard J.
Haken Jack
Miller Paul R.
U.S. Philips Corporation
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