This part of IEC 60034 specifies efficiency classes for variable speed AC motors that are rated according to IEC 60034-1 or IEC 60079-0, for operation on a variable frequency / variable voltage power supply.

Standard:

DIN CLC IEC/TS 60034-30-2 VDE V 0530-30-2:2024-06

Rotating electrical machines

Part 30-2: Efficiency classes of variable speed AC motors (IE-code)

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