SETTING OVERCURRENT RELAY DAN GROUND FAULT RELAY PADA KUBIKEL 20 KV DI PT. PLN (PERSERO) DISTRIBUSI JAKARTA RAYA
Protection of electric power system is a very important part in the business in the electricity sector of PT. PLN (Persero) as a company that monopolize electricity in Indonesia in demand to always improve the quality of electricity. Protective relay settings (settings) as one of the important procedures should be properly designed and correct in order to work out the interference. Relay settings using the "Micom P123" relay manually or through software must be done with the proper step. Manual settings via keyped on relay until the settings relay through software using "Easergy Studio" Things to know in OCR GFR relay settings are CT ratio used on cubicles and OC GF current calculation results are tried to delay time to be used. The current value of the settings inputted to the OCR GFR relay of "Micom P123" is a comparison between the OC GF currents with the CT Primary values used. In the output cubicles in GIS, based on calculations with CT 800/5 the OC setting current is 0.38 In, MOCI 1 is 5 In and MOC2 7.5 In. While the current setting of GF is 0.1 Ien, MGF1 1 Ien and MGF2 1.125 Ien on outgoing cubicles in GIS