Note on the energy efficiency class

The efficiency of AC motors is specified in 2 standards.

• The IEC 60034‑30‑1 standard specifies the efficiency class (IE codes) for AC motors operating with a fixed supply voltage and frequency (i.e. in grid operation).
• The IEC TS 60034‑30‑2 standard specifies the efficiency classes (IE codes) for AC motors with variable speed (i.e. in operation with a frequency inverter).

Due to its characteristics, the given drive is basically comparable with the drives described in the IEC TS 60034‑30‑2 standard. The drive is therefore evaluated with the efficiency classes defined in the standard.

This standard is applied for certain technologies and ratings for motors designed for continuous duty. However, the standard restricts the scope of application.

For this reason, the nameplate has a ≙ symbol in front of the efficiency class.