National Transformer Oils are developed from Napthenic Base Oils having excellent Electrical properties to meet British Standards and related specifications for Electrical Insulating Oil.
Ensures good insulation of Electrical Conductors.
Prevents arcing between Electrodes.
Minimizes di electric loss.
Effectively cools Transformer Coils.
Provides long service life.
British Standards BS : 148 : 1984 Class I (Inhibited)
International Electro Technical Commission Standard - IEC 296 (1982) Class I A
Recommended for Electrical Insulating Oil applications such as Transformers & Oil immersed switchgear where an oil meeting BSI, IEC or other comparable specification is required by the equipment manufacturer or user.
Clear free from sediments and suspended matter
Density, Kg/dm3 @ 20 °C
ISO - 3675
Flash Point, (PMCC) °C
ISO - 2719
ISO - 3104
cSt@ 40 °C
cSt@ -15 °C
Pour Point, °C
ISO - 3016
Neutralization Value , mg KOH/g
IEC - 296
ISO - 5662
Water Content, ppm
Oxidation Stability (164 hrs @ 100 °C)
a) Total acidity, mg KoH per gm of oil
b) Sludge, % by mass
Break down voltage, as delivered KV
Dissipation factor, at 90 °C and 40 Hz to 62 Hz
Interfacial Tension mN/M @ 25 °C
Handling, Health And Safety Lubricant consisting of highly refined mineral oils with specific additives. In normal conditions of use this lubricant presents no particular toxic hazard. All lubricants, of any kind should be handled with great care, particularly avoiding any contact with the skin.
Prevent any splashing and keep away from combustible materials. Store under cover and away from any risk of pollution. Disposes off the used oil correctly, don’t pour down drains, into watercourses or the soil.