Cable shield resistance test set

Details Cable shield resistance test set Cable shield resistance test set

1993-09-29

1995-02-21

Regan, Maura K.

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

For fault location

324537, 324127, 324718, G01R 2714

Patent

active

053919912

ABSTRACT:
A technique and apparatus for measurement of resistances of 0.025 ohm and ss without disconnection from the circuit. The invention is used for measurement of degradation in cable shields. The method can also be used for measurement of junction resistances in high current circuits such as auto starters. The invention allows measurements to be made with the circuits connected so that the faults are present in the measurement setup. The method includes inductive coupling of long duration repetitive current pulses onto the circuit under test, measurement and display of induced current and voltage pulses, and display of induced current and voltage pulses on an oscilloscope.

REFERENCES:
patent: 2677100 (1954-04-01), Hayhurst
patent: 3702966 (1972-11-01), Schweitzer, Jr.
patent: 3839672 (1974-10-01), Anderson
patent: 4283678 (1981-08-01), Halter
patent: 4973911 (1990-11-01), Marshall
patent: 5189375 (1993-02-01), Tuttle

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