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Why DC voltage is used for testing resistance of Transformer instead of AC voltage?

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Question added by Ashraful Islam , Electrical Design Engineer , General Electric Manufacturing Co Ltd
Date Posted: 2014/06/19
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Ahmed Elsawy
by Ahmed Elsawy , Substation commissioning Engineer , DEWA

In case of ac volt , we have additional components Capacitance and inductance , that is way DC will give accurate reading of resistance

PRIYA PANDEY

Dc voltage is used in testing to check how much pressure can a high voltage cables of the transformer bears.

 

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