Studi Kelayakan Operasi Berdasarkan Uji Dissolve Gas Analysis pada Transformator Distribusi 150 kV Gardu Induk Cibabat Cimahi

The role of insulation media in high voltage equipment is an important component maintaining the ongoing distribution electric power from random interference during operation. Insulation used are air, solid, oil, or gas. All these will experience a decrease performance along with operating time and service life factor equipment. Therefore, maintenance very important. One method diagnosis damage to insulating oil Dissolve Gas Analysis (DGA). DGA conducted determine rate gas growth parts per million (ppm). Some methods Total Combustible (TDCG), Duval’s Triangle, Roger’s Ratio. A sampling transformer isolation this study was on three units 150 kV / 20 Cibabat Cimahi Substation. Oil samples tested through data processing based IEEE Std C57.104-2008 standards SPLN T5.004-5: 2017. test results laboratory PT. PLN (Persero) UPT Bandung shows TDCG unit 1 condition 2 amount flammable at 821 ppm, for combustible 694 ppm 3 1117 so that each -1.36 ppm/day, -1.03 ppm/day 0.95 ppm/day.