@thesis{thesis, author={Mangapul T Juara and Togatorop Dedi Delaya}, title ={ANALISA KINERJA SETTING RELE OCR DAN GFR PENYULANG PATRARAYA DI TRANSFORMATOR 2 GARDU INDUK CERME}, year={2019}, url={http://156.67.221.169/1686/}, abstract={The medium voltage network is one of the distributions of electricity from power plants to consumers. The voltage will be divided between each feeder for distribution. Electricity distribution requires reliability in maintaining channeling equipment from interruptions including short circuit interruptions. therefore to localize the disturbance a protection system is needed. Protection devices commonly used for medium voltage repeaters are overcurrent relays (OCR) and grounded relays (GFR), ie relays that function to give commands to the PMT to open, so that the interrupted SUTM / SKTM is separated from the network. At the writing of this final project, the comparison between OCR and GFR relay settings will be discussed with the OCR and GFR relay settings installed on the Patraraya feeder in the cerme substation. The calculation result of OCR setting on the incoming side can be TMS value = 0.192 with working time t (s) = 0.699 seconds, while OCR setting on the feeder side can be TMS value = 0.148 with working time t (s) = 0.299 seconds. Setting the GFR on the incoming side can be TMS value = 0.187 with working time t (s) = 0.69893 seconds, while setting the GFR on the feeder side can be TMS = 0.11 with working time t (s) = 0, 29650 seconds. Based on the calculation of the relay settings with the relay settings installed are not much different. This shows that the settings installed on the cerme substation are still in good condition.} }