TECHNICAL DATA SCHEDULE
TRANSFORMER OIL
ITEM DESCRIPTION UNITS REQUIRED LIMIT
A PROPERTY
1a Name Transformer Oil
2a Grade IEC -60296 (Inhibited)
3a Viscosity at 40 0C mm2/s Max. 12 mm2/s
4a Viscosity at -30 0C mm2/s Max. 1800 mm2/s
5a Pour point 0C 0C Max -40 0C
6a Density at 20 0C g/ml Max 0.895 g/ml
7a Water content Mg/Kg Max. 30 mg/Kg
8a Dielectric strength KV Min. 30 KV (after treatment Min. 70KV)
(breakdown voltage)
9a Dielectric dissipation factor (DDF) at 900C – Max. 0.005

B REFINING/STABILITY
1b Appearance – Clear, bright, free from suspended matter, sediment and free water
2b Acidity mgK OH/g Max. 0.01
3b Aniline point 0C – Max. 63
4b Interfacial Tension at 250C mN/m Max. 40mN/m
5b Total Sulphur content % <0.10%
Non corrosive to paper and copper
6b Corrosive Sulphur –
7b Inhibitor content % <0.4%
8b Furfural content Mg/ Kg 4 and <8 %
C PERFORMANCE
1c Oxidation stability (U) Uninhibited: Not detectable (<0.01%)
(T) Trace Inhibited oil: <0.08%
(I) Inhibited Oil: 0.08% – <0.4%
2c Total acidity <0.03 mg K OH/g
3c Sludge <0.05%
D HEALTH,SAFETY &ENVIRONMENT
1d Flash point 0C Min 1350C
2d Polycyclo Aromatic content (PCA) % Max 3%
3d PCB Content Not detectable