National Transformer Oils are developed from Napthenic Base Oils having excellent Electrical properties to meet British Standards and related specifications for Electrical Insulating Oil.
Features
Ensures good insulation of Electrical Conductors.
Prevents arcing between Electrodes.
Minimizes di electric loss.
Effectively cools Transformer Coils.
Provides long service life.
Performance Levels
Meets
British Standards BS : 148 : 1984 Class I (Inhibited)
International Electro Technical Commission Standard - IEC 296 (1982) Class I A
Applications
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.
Typical Characteristics
Characteristics
Test Method
Typical Value
Appearance
IEC-296
Clear free from sediments and suspended matter
Density, Kg/dm3 @ 20 °C
ISO - 3675
0.865
Flash Point, (PMCC) °C
ISO - 2719
145
Kinematic Viscosity
ISO - 3104
cSt@ 40 °C
10.5
cSt@ -15 °C
190
Pour Point, °C
ISO - 3016
<-36
Neutralization Value , mg KOH/g
IEC - 296
0.008
Corrosive Sulphur
ISO - 5662
Non-Corrosive
Water Content, ppm
IEC 814
22 ppm
Antioxidant Additives
IEC 666
0.15
Oxidation Stability (164 hrs @ 100 °C)
IEC 1125A
a) Total acidity, mg KoH per gm of oil
0.20
b) Sludge, % by mass
0.035
Break down voltage, as delivered KV
IEC 156
58
Dissipation factor, at 90 °C and 40 Hz to 62 Hz
IEC 247
0.002
Interfacial Tension mN/M @ 25 °C
ISO 6295
47x10-3
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.
Tranoil Class I