@thesis{thesis,
		author={Hutajulu  Albert Gifson and Pahiyati  Novi Gusti and Rajagukguk  Waldi Bonatua},
		title ={Koordinasi Sistem Proteksi Dengan Menggunakan Over Curent Relay (OCR) Dan Ground Fault Relay (GFR) Di Penyulang Bawal Bandengan},
		year={2020},
		url={http://156.67.221.169/3530/},
		abstract={Coordination ofprotection systems Over Current Relay (OCR) and Ground Fault Relay (GFR) that are placed in thesection incoming of the 150 kV GI Muara Karang power transformer and in the section of the outgoing 20 kV pomfret feeder, from the results of the calculation of the interruption current overcurrent disturbance the three phaseis obtained amounted to 13366.13 A, so that the OCR in the section outgoing will work 0.7 seconds, and the OCR incoming will work 0.969 seconds. While the biggest disturbance in one phase to the ground is 955.69 A. And the relay that will work to secure is an GFR outgoing with a working time of 0.688 seconds, while the incoming GFR as a back up will work with a time of 0.699 seconds. equipment protectiveis needed to reduce and prevent the impact of inter ference short circuit, if the protective device is wrong in responding then can occur trip. protection co-ordinates Over Current Relay (OCR) and Ground Fault Relay (GFR) on pomfret have the aim to prevent total blackouts when disturbances occur in the form of short-circuit fault currents and over-current interference.}
		}