Answer / aramuthan

The insulation level in nothing but the type of insulation
used in the winding of the electric machines. There are four
types of insulation level used in electric machines.
A,B,F,H EACH insulation withstands some point of
temperature. for eg A can withstand only 105 deg C

http://tristate.apogee.net/mnd/graphics/fnrins01.gif

Answer / sumit rathi (mzn)

for a particular item of equipment a characteristic defined
by one or two values indicating the insulation withstand
voltages
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