@thesis{thesis,
		author={Chasanah  Arisna Wijayanti and Rusli  Muhammad},
		title ={KAJIAN SISTEM KOORDINASI PROTEKSI OCR dan GFR PADA SISTEM 20 kV TANJUNG BATU},
		year={2021},
		url={http://156.67.221.169/3838/},
		abstract={In the area, in addition to the large number of forests that cause single-phase disturbances to ground, disturbances also often occur due to lightning rain which causes the installed GFR to penetrate to the PLTD, so the author conducted a study of the relay coordination settings used, namely OCR and GFR. After calculating the settings and simulating the coordination of protection using ETAP 16.0.0 the results obtained are differences in time grading between the results of calculations, simulations and installed settings where the time grading calculation results for GFR are 0.3s, 0.6s and 0.791s. In the settings installed, the time grading is 0.03s, 0.06s and 0.09s. From the simulation results, it was found that the coordination of this setting is in good condition, but due to the distance of the relay installation which is very far, this relay will only secure areas that are experiencing disturbances before recloser 2 and for disturbances that occur after recloser 2 will be secured by recloser 1}
		}