Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – Of individual circuit component or element
Reexamination Certificate
2006-06-13
2006-06-13
Nguyen, Vincent Q. (Department: 2858)
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
Of individual circuit component or element
C324S557000
Reexamination Certificate
active
07061253
ABSTRACT:
A system and method for testing polymer insulators is provided. One embodiment includes applying a voltage to a grading shield that is oriented about a top region of a polymer insulator and to a high voltage lead of the polymer insulator; detecting a leakage current across the polymer insulator; determining a resistive current component from the detected leakage current; comparing the resistive current component to a predefined criteria; determining that when the resistive current component is greater than the predefined criteria when the applied voltage is applied, the polymer insulator has failed the test; and determining that when the resistive current component is less than or equal to the predefined criteria when the applied voltage is applied, the polymer insulator has passed the test.
REFERENCES:
patent: 3050681 (1962-08-01), Bhimani
Coffeen, et al., “High Voltage AC Resistive Current Measurement Using a Computer Based Digital Watts Technique”, IEEE Transactions on Power Delivery, vol. 6, No. 2, Apr. 1991, pp. 550-556.
Angeli Eric M.
Coffeen Larry T.
Georgia Tech Research Corporation
Nguyen Vincent Q.
Thomas Kayden Horstemeyer & Risley LLP
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