@thesis{thesis, author={Arifin Zainal and Utami Nuniek Yuli}, title ={Analisa Assessment Kondisi Transformator Tenaga 150/20 Kv Di PT PLN (Persero) Unit Transmisi Jawa Bagian Barat}, year={2020}, url={http://156.67.221.169/5469/}, abstract={Transformers are critical equipment of the electrical power supply system and the most expensive asset in the electric power transmission network. Therefore power transformer condition assessment method is needed to determine the actual condition of power transformer on operating. This thesis proposes a power transformer condition assessment with three stages. First step are Health Index and Susceptibility. Second step is Probability of Failure, that is combination between Health Index and Susceptibility. The last stage is Risk Based Priority as a result of combining Probability of Failure and Criticality Level. The outputs of condition assessment are analysis lifetime prediction, abnormality, recommendations for next action and determine maintenance or replacement priorities. This study has investigated 303 units of power transformers in PT PLN (Persero) Western Java Transmission unit. The result of study is useful for the utility company to improve their transformers asset quality} }