Specifies essential safety and associated requirements, for approval and test purposes, for air-break circuit-breakers for operation at 50 Hz or 60 Hz, having a rated voltage not exceeding 440 V (between phases), a rated current not exceeding 125 A and a rated short-circuit capacity not exceeding 25 000 A. Annex ZZ lists variations for Australian and New Zealand conditions. This Standard is based on, but not equivalent to, and reproduced from, IEC 898:1995.