G - Physics – 01 – R
Patent
G - Physics
01
R
G01R 31/34 (2006.01)
Patent
CA 2062445
W.E. 56,088 Abstract of the Disclosure Both a system and method is provided for detecting faults in the insulating interface disposed between the shaft of a generator, and the bearings and seals that rotatably support it that generally comprises a transformer for selectively inducing an alternating electric potential into the shaft while the shaft is stationary, and a voltage meter for detecting whether the transformer-induced voltage is transmitted across the insulating interfaces. The number of wire windings used in the transformer of the system is preferably chosen so that the ac voltage induced in the shaft has substantially the same characteristics as the ac voltage induced by dissymmetry currents when the shaft is rotated by the turbines which drive the electric generator. The system of the invention is capable of not only detecting the existence of an insulation failure, but also its exact location so that only the defective portion of the insulation need be repaired.
Bereskin & Parr
Twerdochlib Michael
Westinghouse Electric Corporation
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