Apparatus and method for field testing MOV arresters

Details Apparatus and method for field testing MOV arresters Apparatus and method for field testing MOV arresters

2007-01-23

2007-01-23

Hirshfeld, Andrew (Department: 2858)

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

For fault location

C324S551000, C324S537000, C324S547000, C361S040000

Reexamination Certificate

active

11099909

ABSTRACT:
Embodiments test MOV arresters. One embodiment comprises applying a plurality of voltages to a high voltage lead of the MOV arrester, the plurality of voltages being changed between an initial test voltage and final test voltage (corresponding to a point of conduction of a reference MOV arrester); determining a resistive current through the MOV arrester for each of the voltages; determining information corresponding to the resistive current when the applied test voltage corresponds to the point of conduction of the reference MOV arrester; comparing the determined information with information associated with the point of conduction of the reference MOV arrester; determining that the MOV arrester has passed the test when the determined information corresponds to the information associated with the reference MOV arrester; and determining that the MOV arrester has failed the test when the determined information does not correspond to the information associated with the reference MOV arrester.

REFERENCES:
patent: 3050681 (1962-08-01), Bhimani
patent: 4803436 (1989-02-01), Kresge et al.
patent: 5087885 (1992-02-01), Bergstrom
patent: 06082506 (1994-03-01), None
Coffeen, Larry T., et al., “High Voltage AC Resistive Current Measurements Using a Computer Based Digital Watts Technique”, IEEE Transactions on Power Delivery, vol. 6, No. 2, Apr. 1991, pp. 550-556.

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