Electric motors often run around the clock. Even a few percent of efficiency then make a noticeable difference in power consumption.
What the classes say
The standard IEC 60034-30-1 divides line-operated motors into the classes IE1 (standard), IE2 (high), IE3 (premium) and IE4 (super premium). The higher the class, the lower the losses at the same power. Many markets set legal minimum classes, for many three-phase motors at least IE3.
When replacing an older motor with a more efficient one, check frame size, mounting and shaft end; they are standardised but can differ at a higher class. Speed and starting current also change; the starting current can be higher. On drives without a frequency inverter, check contactor (utilisation category AC-3e), motor protection and fusing.
What a request for an electric motor should contain
- nameplate of the old motor
- power, voltage, frequency and speed
- frame size, mounting type and shaft end
- desired efficiency class
- operation on the line or on a frequency inverter
Read more
Similar requirement?
Send us your parts list, a nameplate or a drawing. We check the sourcing and get back to you.