ANALISIS PENGUJIAN TAN DELTA PADA TRANSFORMATOR ARUS DI GITET TASIKMALAYA BAY PENGHANTAR BANDUNG SELATAN-1

Current transformers are essential for substation protection. It converts large currents into smaller that used measurement and triggering protection systems. Errors in the conversion of electric current can lead to inaccuracies system failures. Improper maintenance use shorten life transformer also earlier failure. One tests applied is tan delta test determine loss coefficient insulating material. A decrease insulation quality increases value. The capacitance value measured test. An increased indicates paper has been damaged. Generally, damaged causes a short circuit between capacitor layers which characterized by an increase By using GST-Ground method with Megger Delta 4110 measuring instrument, results R, S, T phases southern send bay Bandung-1 GITET Tasikmalaya 0.42%, 0.47%, 0.45%. independent calculations phase 0.29%, 0.28% 0.31%. From both results, be said feasible operate because below 1% operational standard transformer.