Type Tests of the Power Transformer

Abstract

Considering the significance of the power transformers as a key equipment for transfer and distribution of the electrical power system and to prevent their failure states bearing in mind their price, different types of tests are subjected to illustrate the momentary state of the equipment, which have specific relationship to the insulation condition of liquid, solid and gas. Throughout this thesis data have been presented showing samples of transformer type tests which were performed to a prototype in the factory and compare the results with the typical range of the IEC standard and transformer data sheet. It is suggested further that the necessity to perform other tests such as no-load, short circuit and transformer turn ratio tests before putting them into service.