Suitable for use as an insulating and heat transfer medium

Quenching medium for power and distribution electrical apparatus such as transformers, switchgears, capacitors etc.

Approved by CPRI & ERDA

Meets IS 335 : 1993

Oils covered by this standard are low viscosity type completely free from additives

The standard doesn't apply to

• Inhibited oils ( refer IS 12463 : 1988)
• oils required for cables requiring high

viscosity oils

• synthetic di-electric liquids

Total Sludge Value

The % by wt. of insoluble matter formed when the oil is heated and oxidized under specified conditions and subsequently diluted with n-heptane

SK Value

It is the increase in the volume of concentrated Sulphuric acid on adding a given sample in the prescribed apparatus following defined procedure

Electric Strength ( Break Down Voltage)

The voltage at which the oil breaks down when subjected to an AC electric field with a continuously increasing voltage contained in a specified apparatus