This part of IEC 60076 applies to dry-type power transformers (including auto-transformers) having values of highest voltage for equipment up to and including 72,5 kV and at least one winding operating at greater than 1,1 kV. 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; starting transformers; testing transformers; traction transformers mounted on rolling stock; flameproof and mining transformers; welding transformers; voltage regulating transformers; small power transformers in which safety is a special consideration. Where IEC standards do not exist for the transformers mentioned above or for other special transformers, this standard may be applicable as a whole or in parts.