Insulation monitoring system of a direct current power supply sy

Details Insulation monitoring system of a direct current power supply sy Insulation monitoring system of a direct current power supply sy

1990-04-04

1991-12-24

Wieder, Kenneth A.

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of ground fault indication

324509, 324551, 324117H, G01R 314

Patent

active

050756281

ABSTRACT:
Insulation monitoring of a direct current power supply system is achieved by application of an alternating current and the detector is constituted by a current transformer and a Hall-effect current sensor. This Hall-effect sensor controls a direct current generator, which supplies a compensation winding of the current transformer, so as to prevent saturation of the toroid of this current transformer. When a ground fault occurs, the alternating current generator generates a fault current detected by the transformer.

REFERENCES:
patent: 4118597 (1978-10-01), Proctor et al.
patent: 4188574 (1980-02-01), Allington
patent: 4278940 (1981-07-01), Milkovic
patent: 4280162 (1981-07-01), Tanka et al.
patent: 4546309 (1985-10-01), Kang et al.
patent: 4682101 (1987-07-01), Cattaneo
patent: 4929903 (1990-05-01), Saigo et al.
Patent Abstract of Japan, vol. 7, No. 113 (P-197) [1258] May 18, 1983.

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