FAULT DEVELOPED IN POWER TRANSFORMER: A REVIEW

Power transformer is major power system equipment. Their reliability not only affects the electric energy availability of the supplied area, but also affects the economical operation of a utility. Determining transformer condition is useful for making short - term decisions regarding operation and maintenance. The major concern of the power transformer incipient faults is that they may decrease the electrical and mechanical integrity of the insulation system. Incipient faults of power transformers can be classified into the following m ajor categories: electrical arcing, electrical corona, overheating of cellulose, overheating of oil. These faults may be caused due to one or more of the causes.