@thesis{thesis,
		author={Roswiem  Ruslan and Wardana  Andi Wira},
		title ={STUDI KERJA RELAY DIFERENSIAL DAN RELAY ARUS LEBIH TRAFO TENAGA TERHADAP GANGGUAN HUBUNG SINGKAT
DI BUSBAR 20 KV GI CENGKARENG},
		year={2016},
		url={http://156.67.221.169/1066/},
		abstract={Power transformers is a vital tool in its function to supply power to the load center . In the power transformers can?t be avoided presence disruption. One of the disturbances is short circuit immediately addressed. Therefore, to overcome the interference necessary in order not to cause damage protection system that meets the requirements of sensitivity, reliability, selectivity, and speed, all of which depend on the correct setting of protection equipment. Protective equipment which is used for power tansformator is differential relays and overcurrent relays instructed Circuit Breaker (CB) function to open the contacts, so that disturbed power transformers can be separated from the system. In this paper study the differential relay is installed if it is selective in working and study the coordination work overcurrent relay against short circuit at the busbars 20 kV in substation Cengkareng The methodology of research conducted by study results fro}
		}