Pre-Requisites For Short Circuit Withstand Test On Transformer & Its Failure Analysis

Abstract

Transformers are always subjected to various electrical, thermal, mechanical and dielectric stresses during its life time under both normal and abnormal conditions. The most onerous and fatal situation that is encountered by the transformer is short circuit condition due to which the transformer has to undergo severe electro-dynamic forces produced by the high currents. Thus in this paper obligations for short circuit withstand test on transformer and its failure analysis has been discussed with reference to various power transformers tested at CPRI as per IS & IEC standards.