Electricity: electrical systems and devices – Safety and protection of systems and devices – Ground fault protection
Patent
1990-03-30
1992-06-09
DeBoer, Todd E.
Electricity: electrical systems and devices
Safety and protection of systems and devices
Ground fault protection
361 45, 361 49, 361 79, 361111, H02H 338
Patent
active
051212820
ABSTRACT:
An arcing fault detector is set up to identify arcing faults and to distinguish them from other disturbances in a circuit. A plurality of electrical conditions are monitored and the conditions are tested against predetermined parameters for establishing a series of logical conditions relating to the presence of an arcing fault. A logic circuit combines the logical conditions for deciding on the presence of an arcing fault. An output signal of the logic circuit is used to activate a relay for interrupting the supply of electrical power to the circuit.
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Industrial Power Systems Data Book, "Fundamentals of A-c Short-Circuit Currents", published by General Electric, Section .10, pp. 7-11, and Section .102, pp. 1-7.
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