@thesis{thesis,
		author={G.M Tambunan  Yohara and Senen  Adri and Widyastuti  Christine},
		title ={Analisis Penyetelan Sistem Proteksi Rele Diferensial Pada Transformator 60 MVA ; 150 – 20 kV di Unit 1 GIS 150 kV Daan Mogot},
		year={2020},
		url={http://156.67.221.169/3067/},
		abstract={The power transformer is an important electrical equipment in the distribution of eIectrical energy. In operation, the power transformer may experience interference. One of the ways to overcome this problem is installing differentiaI reIay and caIculating and anaIyzing the relay settings so that the system can work properly. In this study, an analysis of the 150/20 kV power transformer differential relay system setup in the Daan Mogot GIS was conducted. The setting?s are caIculated based-on theory, transformer data, manual rele, current transformer and-reIay. This setup uses severaI calculation stages. Among them, the CT ratio of the 20kV side was 2000 / 1A, the CT ratio of the primary side was 300 / 1A. The K1 sIope of 26% is assumed to be 30% by the PLN standard. Is1 is 0.3 assuming the transformer resistance current is Iess than 10% or 0.1 taking into account the toIerance, CT, and-tap changer. ls2 is set at 1pu where when the bias current is greater than In, the possibiIity of an error due to CT- saturation is greater. And- it is hoped that with these adjustments the power transformer protection system can work optimaIIy.}
		}