The electrical winding and the magnetic core in a transformer are subject to a number of different forces during operation, for example.
a) Expansion and contraction due to thermal cycling.
b) Vibration.
c) Local heating due to magnetic flux.
d) Impact forces due to through fault current.
e) Excessive heating over loading or inadequate cooling.
These forces can cause deterioration and failure of the winding electrical insulation.
Tuesday, February 25, 2014
TYPES OF POWER TRANSFORMER FAILURES
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