This Standard adopts IEC 60214 1:2014 with modifications for Australia and New Zealand, which specifies performance requirements and test methods for on-load tap-changers of both resistor and reactor types, de-energized tap-changers, and their motor-drive mechanisms. This Standard applies mainly to tap-changers immersed in mineral insulating oil according to AS 60296 but may also be used for tap-changers with air or gas insulation or immersed in other insulating liquids insofar as conditions are applicable. This Standard applies mainly to tap-changers with arcing contacts but may also be used for arcing-free on-load tap-changers (such as electronic switching) insofar as conditions are applicable. This Standard applies to power and distribution transformers of all types and to reactors. This Standard does not apply to transformers and reactors mounted on railway rolling stock.