Electrical fault detecting device

Details Electrical fault detecting device Electrical fault detecting device

G - Physics

01

R

324/4, 324/50, 3

G01R 35/04 (2006.01) G01R 11/24 (2006.01)

Patent

CA 2004890

ABSTRACT ELECTRICAL FAULT DETECTING DEVICE An apparatus for determining incorrect usage of an alternating current electricity supply to a metering device, has first signal generating means, disposed at a first location in the supply, for generating a first signal which varies with a property of the electricity supply in the vicinity of the first location, second signal generating means, disposed at a second location in the supply, for generating a second signal which varies with a property of the electricity supply in the vicinity of the second location and monitoring and actuator means adapted to monitor the two signals and to produce a third, actuating signal when the first and second signals are inconsistent with a correct electricity supply. The signal generatime means may, for example, comprise a coiled portion (26,28) of one or more cables forming part of the supply to produce a magnetic flux signal. Alternatively, or in additon, the signal generating means may comprise a coil positioned around a cable forming part of the electricity supply. The signal generating means may also take the form of a device for producing a signal which varies with the rotation of a meter disc.

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