HOW TO PROTECT TRANSFORMERS AND INCREASES LIFETIMES OF TRANSFORMERS?
INTRINSIC PROTECTIONS OF TRANSFORMERS
INSULATION DEFECTS -1 In maintenance, it is very common to
pick up transformers with an insulation level below the recommended level. Who can reduce the isolation level of the
transformer: OIL MOISTURE AGING OF OIL AND INSULATING MATERIAL.
REACTIONS AND DETERIORATIONS - 2 - Of these two, the one
that most causes the reduction in the level of insulation is humidity. In addition to causing a reduction in the
level of insulation of the equipment, it enters a chemical reaction with the
various materials present there and accelerates the aging of the insulating oil. When checking a moisture content in a
transformer associated with a low insulation level, it may be that purifying
the oil or even changing the oil will not solve the problem.
REACTIONS AND DETERIORATIONS. This is because the insulating
material is exposed to moisture for a long time. It will penetrate into parts that are too
deep that even thermo-vacuum treatment will solve. In these cases, only greenhouses can solve the
problem.
FOOTSTEPS With the transformer disconnected from the
electrical system and clean bushings, measure the ohmic insulation resistance
and write down the values. csine 2
Remove the insulating oil completely from the transformer. Measure the ohmic insulation resistance again
with this new condition.
FOOTSTEPS 3 If the
insulation level has risen considerably, the humidity has not yet compromised
the equipment and oil treatment or replacement will solve the problem. 4 If the insulation level has not risen, it
is necessary that the equipment be sent for maintenance in a workshop for
drying in an oven.
