Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – Of individual circuit component or element
Patent
1986-03-17
1988-07-26
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
Of individual circuit component or element
324530, 324559, 324456, 324458, G01R 2912, G01R 1900, G01N 3102
Patent
active
047603437
ABSTRACT:
A method and apparatus for detecting defective insulators in an insulating column supporting an electrical conductor in a power line. The column is made of a plurality of serially connected insulator members. Voltage present on the conductor supported by the column generates an electric field about it. The presence of faulty insulators within the column causes field redistribution and discontinuities in it. A specially configured electric field probe is provided to measure at predetermined distance and locations, this electric field. A displacement device is provided whereby to displace the probe along an axis substantially parallel along the length of the column to automatically obtain measurements. Means to analyze the measurements are provided and allow to identify the defective insulators whose positions correspond to the locations of the discontinuities in the electric field surrounding the column. The main advantage of this method is that no electrical contact need to be made to the insulators.
REFERENCES:
patent: 1542815 (1925-06-01), Bennett
patent: 1896598 (1933-02-01), Spangler
patent: 4266184 (1981-05-01), Devine
patent: 4328461 (1982-05-01), Butters
patent: 4571539 (1986-02-01), Rodriguez
Spiegel: "An Improved Optical Isolated ELF Electric Field Sensor", 1979, Symposium on EM Compatibility-pp. 429/434 (10/1979).
Rizk Farouk
Vaillancourt Georges H.
Eisenzopf Reinhard J.
Hydro-Quebec
Solis Jose M.
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