Transformer PM Best Practices
Transformer PM Best Practices
(OP)
Can someone offer a short summary of Transformer PM Best Practices for visual, mechanical, and electrical testing/inspection and the recommended intervals. The particular one in question is a customer owned, pad mount, 12.5kV x 480V serving critical loads.






RE: Transformer PM Best Practices
However, since it is critical, I would recommend the tests outlined in NETA Maintenance Test Specification: Oil sampling annually for dissolved gases and physical properties, and electrical tests every two years, three if it's in a nice, clean location.
old field guy
RE: Transformer PM Best Practices
- IR
- Wdg Resistance
- Low voltage excitation current
- Earth Resistance measurments
Protection Tests - Annual
- Bucchholz
- PRV
- Protection relays if installed
Inspection - Annual
- For oil leak
- Corrosion
- Earthing - protective
- Connection Tightness
- Bushing Inspection
Other
- DGA - Annual / as required
- Structural Integrity
Hope this helps.
NC