Overheating of coil
1)Over voltage
Remedy: Check & correct terminal voltage/replace with higher voltage coil
2)Under voltage failure of magnet to seal in
Remedy: Correct terminal voltage / replace with lower voltage coil or change transformer tap
3)Inter turn short circuit of Coils (Coil getting excessively hot turned brown in colour)
Remedy: Replace coils
4) Dirt or rust on pole faces increasing the air gap
Remedy : Clean pole faces. Don’t use grease solvents or sharp objects while cleaning
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