Answer / laxmi kumari & wahid hussa

minral oil.

oil is used in transformer for insulating & cooling purpose.

Answer / jayesh pillai

oil used in transformer must be for
insulating
cooling
having high dielectric strength
bdv must be higher than 45kv
low viscosity oil

Answer / dhananjay kumar

THE OIL USED IN TRANSFORMER IS INSULATING(MINERAL) OIL.THE ASKAREL AND PYROCROL IS TWO INSULATING MINERAL OIL WHICH PROVIDE COOLING AS WELL AS INSULATION FROM WINDING

Answer / raj aamath

transformer oil should have high dielectric strength so we can not use mineral, animal,and vegitable oil becoz the dielectric strength of these oil are very poor.so we use polynor or silicon oil which have high d.s.

Answer / nissan patel gujarat

Insulating oil in an electrical power transformer is commonly known as Transformer Oil. It is normally obtained by fractional distillation and subsequent treatment of crude petroleum. That is why this oil is also known as Mineral Insulating Oil. Transformer Oil serves mainly tow purposes one it is liquid insulation in electrical power transformer and two it dissipates heat of the transformer e.i. acts as coolant. In addition to these, this oil serves other two purposes, it helps to preserve the core and winding as these are fully immersed inside oil and another important purpose of this oil is, it prevents direct contact of atmospheric oxygen with cellulose made paper insulation of windings, which is susceptible to oxidation.
Generally there are two types of Transformer Oil used in transformer,

1. Paraffin based Transformer Oil

2. Naphtha based Transformer Oil

Answer / murugesan

insulating oil use the transformer

Answer / sagar khandey (r.c.e.t, bhila

1.INSULATING OIL IS USED IN x-MER.
2.The oil should be greater than 100M Ohms resistance.
3.we can't define its BDV value, without knowing its rating.
for Example:
MINIMUM BDV in KV RATING in KV
23 KV <69
26KV <69 KV-288KV

26 KV >388KV

Answer / ashok kumar

oil helps cool transformer b/c it also provide part of electrical insulating b/w internal live parts.

Answer / manjunath

Lubricant oil is used in T/F for Cooling Purpose

Answer / ramki

INSULATING OIL

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