transformer oil

Sr. Characteristic Test Method Test Value 1 Appearance Examination ThroughMM Thick Oil Layer Clear & free fromsediments. 2 Density at 27. C CST IS : 1448 (P:16) (1967) 0.845 gm/cm. 3 Kinematic Viscosity at 27? C N/m IS : 1448 (P:25) (1960) 17.82 CST 4 Interfacial Viscosity at 27? C N/m IS : 6104 (1971) 0.04 N/M 5 Flash Pont (PMCC)? C IS : 1448 (P:21) (1970) 186? C 6 Pour Point? C IS : 1448 (P:10) (1970) -20? C 7 Neutralisation Value (Total Acidity)mo KHO/gm Oil IS : 335 (1972) App-'A' 0.01 mg KOH 8 Corrosive Sulphur Copper Strip IS : 335 (1972) App-'B' Non Corrosive 9 Electric Strength (Break down Voltage) KV (rms) IS : 6792 (1972) 65 KV 10 Di-electric dissipation facto (Tangent Delta) at 90? C IS : 6262 (1971) 0.002 11 Specific Resistance Ohm Cm (a) At 27? C(b) At 90? C IS : 6103 (1971) 1600x1012cm 70x1012cm 12 Oxidation Stability (a) Neutralisation Value mg KOH per gm(b) Total Siudge in oxidized oil% w/w IS : 335 (1972) App-'C' 0.2 mg/KOH/g 0.9 13 Presence of oxidation inhibitor IS : 335 (1972) App-'D' Absent 14 Water Content ppm (Karl Fisher Method ) IS : 2362 (1963) 32 PPM