Electricity: electrical systems and devices – Safety and protection of systems and devices – Ground fault protection
Patent
1979-11-07
1982-01-19
Salce, Patrick R.
Electricity: electrical systems and devices
Safety and protection of systems and devices
Ground fault protection
361 42, H02H 333
Patent
active
043120229
ABSTRACT:
Protection against a high voltage apparatus becoming inadvertently grounded and thereby presenting a shock hazard is provided by introducing a ground fault interrupter in the power supply to the electrical control device which controls the supply of high voltage power. The two-wire power supply line between the ground fault interrupter and the control device has one wire grounded ahead of the interrupter and the other wire connected to the high voltage apparatus through a rectifier and a D.C. filter. Thus if the high voltage apparatus becomes accidentally grounded there is a drain to ground from the ground fault interrupter through the rectifier connection, which drain causes the interrupter to cut off the power supply to the control device thereby shutting down the high voltage apparatus.
REFERENCES:
patent: 4044395 (1977-08-01), Eckart
patent: 4156884 (1979-05-01), Eckart et al.
patent: 4159501 (1979-06-01), White
patent: 4233639 (1980-11-01), Klein et al.
patent: 4233640 (1980-11-01), Klein et al.
Omeco-St. John Co.
Salce Patrick R.
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