Diagnostic Increasing The Water Content of The Transformers in PLN UPT Karawang

Abstract

The power transformer is a primary part of the transmission line, PT. PLN (Persero) UPT Karawang as a maintenance unit must ensure the power transformer can operate sustainably. One of the most important from power transformer is the oil insulation because they function not only as a coolant but also as insulation. Water content is the main enemy of insulation because of the water content impact on the actual operating conditions and the lifetime of the transformer. To control that, PLN already implemented characteristics testing for decades as a method to assess the condition of power transformers. The increasing the value of water content in the transformer can be caused Ingress of moisture from the atmosphere, degradation of insulation and error during sampling and testing.