- Tests on-load tap changers
- No-load loss and current measurement
- Short-circuit impedance and load loss measurement
- Temperature-rise type test (IEC 60076-2)
- Dielectric-type tests (IEC 60076-3)
- Sound level test (IEC 60076-10) for each method of cooling for which a guaranteed sound level is specified
- No-load loss and current measurement at 90% and 110% of the rated voltage
- Winding hot-spot temperature-rise measurements
- Dielectric special tests (IEC 60076-3)
- Determination of capacitances windings-to-earth and between windings
- Short-circuit withstand test
- Detection of harmonic content in the no-load current
- Zero-sequence impedance(s) measurement on three-phase transformers
- Check of external coating (ISO 2178 and ISO 2409 or as specified)
- Determination of weight with transformer arranged for transport for transformers up to 1,6 MVA by measurement; for larger transformers by measurement or calculation as agreed between manufacturer and purchaser
- Thermographic detection of hot-spots
- In-rush surges test
- Low-temperature test
