@thesis{thesis, author={ALFIATIE RAMADHANI RACHMAWATI and Tresya Mauriraya Kartika}, title ={ANALISIS RUGI-RUGI DAYA PADA TRANSFORMATOR DI GARDU INDUK 150KV KALIBAKAL}, year={2022}, url={http://156.67.221.169/5312/}, abstract={The transformer serves as an electrical energy converter, making it a crucial piece of equipment in the electric power system. Losses are the loss of some of the energy produced, which lowers the amount of energy that can be sold to consumers and lowers the profitability of the business. A good power infrastructure is required in the Purwokerto area in order to manage the area's well-maintained electricity demand due to the fluctuating nature of the electrical energy demand in Purwokerto. The goal of this study is to ascertain the power losses of power transformers 1 and 5 at the Kalibakal 150 kV substation. A quantitative correlation method was utilized to carry out this study, and thi. A quantitative correlation approach was employed to carry out this research, with operating loads and losses being calculated as it was done. Transformer 1 has its largest power loss in December 2021 at a value of 24.910 kW at 10:00, while Transformer 5 experiences its highest loss in November 2021 at a value of 58,817 kW at 10:00, and at a value of 23.909 kW at 19.00. According to the findings, total loss increases with increasing current and loading.} }