Differential current detection

Details Differential current detection Differential current detection

2007-05-29

2007-05-29

Sircus, Brian (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

C361S045000

Reexamination Certificate

active

10850769

ABSTRACT:
A detection circuit detects a difference between a source current and a return current. The detection circuit includes a constantly biased magnetic core through which conductors of the source and return currents extend, and a sense winding around the core. The sense winding carries an AC signal. A sensing circuit connected with the sense winding senses a change in small signal impedance of the sense winding relative to the core. This detection circuit can be used to protect people and equipment against accidental contact with high-voltage DC systems.

REFERENCES:
patent: 3609458 (1971-09-01), Penn
patent: 3699442 (1972-10-01), Riley
patent: 4118597 (1978-10-01), Proctor et al.
patent: 4278939 (1981-07-01), Henry
patent: 4280162 (1981-07-01), Tanka et al.
patent: 4542432 (1985-09-01), Nichols et al.
“LM1851 Ground Fault Interrupter”, 1995 National Semicondcutor Corporation, Jun. 1992, pp. 1-8.
A.S. Kislovski, Ascom Hasler Ltd, Berne, Switzerland, “Linear Variable Inductor In D.C. Current Sensors Utilized In Telecom Solar Battery Chargers”, IEEE Telecommunications and Energy Conference, INTELEC, Oct. 18, 1989, pp. 23.2/1-23.2/3, vol. 2.

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