Rotating electrical machines - Part 12: Starting performance of single-speed three-phase cage induction motors

<span style="color:red">NEW!</span>IEC 60034-12:2016 is available as <a href="https://webstore.iec.ch/publication/59475">IEC 60034-12:2016 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.</br></br>IEC 60034-12:2016 specifies the parameters for eight designs of starting performance of single-speed three-phase 50 Hz or 60 Hz cage induction motors in accordance with IEC 60034-1 that: - have a rated voltage up to 1 000 V; - are intended for direct-on-line or star-delta starting; - are rated on the basis of duty type S1; - are constructed to any degree of protection and explosion protection. The main changes with respect to the previous edition are as follows: - new design letter E for extended efficiency motors, explanation of all design letters, and description of new designs NE, NEY, HE, and HEY; - addition of a reference to IEC 60079-7; - addition of a formula to calculate locked rotor current from apparent power.