IEC TS 60034-25:2014 describes the performance characteristics of a.c. electrical machines for use on converter supplies. For electrical machines specifically designed for converter duty application design features are defined. It also specifies the interface parameters and interactions between the electrical machine and the converter including installation guidance as part of a power drive system, but except for the voltage at the power interface which is described in IEC 61800-8. The main technical changes with regard to the previous edition are as follows:
- merging of IEC TS 60034-17 into IEC TS 60034-25 adding a clause which now includes all specific requirements for standard non-definite purpose electric machines;
- removal of Annex C: Noise increments due to converter supply.