Testing of Temperature at Conductor and Oil of Mineral-Oil-Immersed Transformer in order to be the Criterion for Transformer Design

Abstract

The design of transformer should be paid on the consideration of temperature at conductor and oil because when the transformer is in normal state or overload, the temperatures at these areas are not equal. So, the consideration at conductor and oil for designing will enhance a reasonable cost transformer.

This paper proposes temperature testing of conductor at high voltage part, low voltage part and oil. Temperature testing is operated at any level of oil-immersed transformer. This testing includes short circuit test at secondary part, then generates current with total loss in order to compare with real load testing. If both testings are relevant, it is useful for the test of large KVA transformer because the cost of providing load and electrical energy will be reduced. The specific parameter and relations among heat at any location and are useful for design, protection of over temperature, prediction of temperature, determination load for transformer shall be known and advised to be the criterion for designing the successive transformer.