AS/NZS 60898.1:2024 adopts and modifies IEC 60898 1:2015+AMD 1:2019 (ED. 2.1), which applies to a.c. air-break circuit-breakers for operation at 50 Hz, 60 Hz or 50/60 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