Method for diagnosing an insulation deterioration of an electric

Details Method for diagnosing an insulation deterioration of an electric Method for diagnosing an insulation deterioration of an electric

1992-12-07

1994-01-04

Wieder, Kenneth A.

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of individual circuit component or element

324544, G01R 2726

Patent

active

052764010

ABSTRACT:
A charging current flows through an insulation for insulating two conductors of an electric apparatus by applying an alternate current voltage thereto. A direct current component of the charging current is detected, and is amplified by biasing a direct current voltage to the alternate current voltage. An insulation deterioration of the electric apparatus is determined by an absolute value of the amplified direct current component.

REFERENCES:
patent: 3178640 (1965-04-01), Jaster et al.
patent: 4721916 (1988-01-01), Hanasawa et al.
patent: 4766386 (1988-08-01), Oliver et al.
patent: 4980645 (1990-12-01), Soma et al.
IEEE Transactions On Power Delivery, vol. 4, No. 2, Apr. 1989, New York A. Nakajima et al.: "Development Of A Hot-Line Diagnostic Method For Xlpe Cables And Measurement Results".
IEEE Transactions On Power Delivery, vol. 2, No. 1, Jan. 1987, New York H. Oonishi et al.: "Development Of A New Diagnostic Method For Hot-Line XLPE Cables With Water Trees".

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