Liquid Dielectrics are extensively used in
high voltage Cables, Capacitors and Transformers
& Circuit breakers. In addition to their function as
an insulator, liquid dielectrics also act as heat trans-
fer agent. Liquid dielectric generally has breakdown
strength of 1 MV/cm (i.e. 10 times more than the
dielectric strength of gases) and act as cooling agent
in Distribution Transformers as well.
Chemical Composition of Transformer Oil:
Liquid dielectrics are derivatives of crude oil and
contain either long chain hydrocarbons or ring
structure hydrocarbon compounds termed
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