as Paraffinic & Naphthenic respectively. Naphthenic
base oil is most widely used compare to Paraffinic,
which forms sludge at low temperature.
Breakdown Mechanisms of Liquid Dielectrics in
Transformer
Insulating liquids are not chemically pure and con-
tain certain impurities like gas bubbles, suspended
particles in the form of fibrous & conducting impu-
rities which reduce the breakdown strength of these
liquids considerably (presence of 0.01% moisture
content in liquid dielectrics reduces its strength by
50