Means for protecting hazardous areas against electrical faults

Details Means for protecting hazardous areas against electrical faults Means for protecting hazardous areas against electrical faults

1977-12-13

1980-03-25

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

361 91, 361111, H02H 320, H02H 720

Patent

active

041953258

ABSTRACT:
A silicon controlled rectifier is provided to short circuit rapid surges or overloads in a power supply. The silicon controlled rectifier is turned off in normal use with two equal and opposite biases applied to the control terminal. Signals from overload or rapid surge detecting circuits cancel the bias which tends to turn off the silicon controlled rectifier whereby the opposite bias causes the silicon controlled rectifier to short circuit.

REFERENCES:
patent: 3449634 (1969-06-01), Hung
patent: 3496415 (1970-02-01), Ruthenberg et al.
patent: 3727105 (1973-04-01), Hochheiser
patent: 3729652 (1973-04-01), St. Clair

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