Live circuit resistance measurement system and method

Details Live circuit resistance measurement system and method Live circuit resistance measurement system and method

1995-11-20

1997-02-04

Wieder, Kenneth A.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

324537, 324705, 324713, 324718, 361 86, G01R 2708, G01R 3100

Patent

active

056002556

ABSTRACT:
A method and apparatus for measuring the electrical resistance of a circuit energized with AC power. The invention imposes a known DC current in the circuit under test and senses a resulting DC voltage drop that corresponds to the resistance of the circuit. The invention senses AC overvoltage conditions in the circuit under test and electrically isolates the measuring circuit from the circuit under test.

REFERENCES:
patent: 4278931 (1981-07-01), Huggins
patent: 4808914 (1989-02-01), Talmor
patent: 4963830 (1990-10-01), Roth et al.
patent: 5006809 (1991-04-01), Mang et al.
patent: 5057772 (1991-10-01), Bruno et al.
patent: 5424894 (1995-06-01), Briscall et al.
patent: 5495178 (1996-02-01), Cheng

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