@thesis{thesis,
		author={Erlina  Erlina and Solichin  Ahmad},
		title ={PERHITUNGAN SETTING DAN KOORDINASI RELAY ARUS LEBIH BAY TRANSFORMATOR 60 MVA 150/20 KV DI GARDU INDUK BOGOR BARU},
		year={2021},
		url={http://156.67.221.169/3653/},
		abstract={Electric power protection system is a safety system on equipment equipment installed on the electric power system against abnormal conditions of operation of the electric power system. In this final project, the relay used does not work /operate for different and 20 kV Outgoing side relay. So that the current of short circuit interference 3 phases that are large enough is felt up to the power transformer value of 13,856 kA. This is due to the failure of the coordination protection system. In this discussion is to calculate the short circuit current of 3 phases, the nominal current of the transformer, the resilience of the transformer and the recalculation of relays that do not work / operate. For the calculation of relay coordination obtained the following results where time delay (Td) is 1.5 percent for the side of 150 kV, Time delay (Td) is 1 second for the incoming 20 kV side and Time delay (Td) for the outgoing 20 kV side is 0.4 percent. This is done to protect the power transformer used. From the calculation it can be seen that the relay is selective in working in order by using the ETAP 16.0.0 application.}
		}