Motor Efficiency – Standards and Classification per IEC60034
New IEC 60034-30-1 defines four motor efficiency levels for three-phase induction motors. The updated standard IEC 60034-30-1 includes IE1, IE2, IE3, IE4 and the latest in-addition is IE5. 8-pole motors and extended power range added to standard.
Efficiency classes
IEC 60034-30-1 defines efficiency classes for induction motors (IE):
- IE1 (Standard Efficiency)
- IE2 (High Efficiency)
- IE3 (Premium Efficiency)
- IE4 (Super Premium Efficiency)
| IEC Standard includes the following line-motors | |
| Number of poles | 2, 4, 6, 8 |
| Power range | 0,12 – 1.000 kW |
| Level | IE1 – Standard Efficiency |
| IE2 – High Efficiency | |
| IE3 – Premium Efficiency | |
| IE4 – Super Premium Efficiency | |
| Voltage | < 1000 V, 50/60 Hz |
| Degree of protection | all |
| Operating mode | S1 (permanent operation with constant load); motors, that are designed for different operating modes but can still be operated permanently with rated output. |
| Degree of temperature | -20°C – +60°C |
| Altitude | Up to 4.000 m above sea level |
| Geared motors | yes |
| Smoke Extraction Motors with a temperature class up to 400°C | yes |
| Validity | Standard IEC 60034-30-1 valid since March 2014 |
For Example:
- A 4 pole small motor of 2 hp operating at 50 Hz:
IE1 efficiency is 77.2%
IE2 efficiency is 82.8%
IE3 efficiency is 85.3% - For bigger ones, 2 pole 200 kW operating at 50 Hz:
IE2 efficiency is 95.3%
IE3 efficiency is 95.8%
We offer axial fans, Jet fans, centrifugal fans with IE2, IE3 and IE4 motors.
Payback period will depend upon the running hours and cost of electricity. Energy represents more than 97 percent of total motor operating costs over the motor’s lifetime.
The payback period is determined by dividing the initial cost of energy-efficient equipment by projected annual savings.
If a Motor Costs INR30,000 and the estimated savings is something around 1KW everyday, the cost is INR 1 for every hour of power consumption , the total projected annual savings would be INR 7300.
Now, 30,000/7300= approximately 4 years, which is your payback period.
Note: All figures used are imaginary and for illustration only
