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Kerr-Mcgee Nuclear Corporation

Orval C White

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.

Arcing fault detector

The present invention contemplates an improved method and control apparatus for indicating the leakage resistance in an electrical system wherein the electrical system generally includes an alternating current power source connected to a load via a conductor assembly, and wherein the control apparatus generally includes: a direct current power source connected to the electrical system for impressing a direct current control signal on the electrical system, and a portion providing an output indication of the leakage resistance in the electrical system.

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Spencer, OK, United States of America

Orval C White