This part of IEC 60076 applies to dry-type power transformers (including auto-transformers) having values of highest voltage for epuipment up to and including 36 kV and at least one winding operating at greater than 1,1 kV. The standard applies to all construction technologies. This standard does not apply to: - gas-filled dry type transformers where the gas is not air; - single-phase transformers rated at less than 5 kVA; - polyphase transformers rated at less than 15 kVA; - instrument transformers (see IEC 60044 and IEC 60186); - starting transformers; - testing transformers; - traction transformers mounted on rolling stock; - flameproof and mining transf