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ಮೋಟರ್ ದಕ್ಷತೆ ಕ್ಯಾಲ್ಕುಲೇಟರ್
Compare IE1–IE4 motor efficiency classes per IEC 60034-30-1:2014, plus indicative IE5 (Ultra Premium). Calculate annual energy cost and savings from upgrading to a higher efficiency class.
Results
Energy Consumption Formula
IE Class Minimum Efficiencies (4-pole, 50 Hz)
| Power (kW) | IE1 (%) | IE2 (%) | IE3 (%) | IE4 (%) |
|---|---|---|---|---|
| 0.75 | 72.1 | 79.6 | 82.5 | 85.7 |
| 1.5 | 77.2 | 82.8 | 85.3 | 88.2 |
| 3 | 81.5 | 85.5 | 87.7 | 90.4 |
| 7.5 | 86.0 | 88.7 | 90.4 | 92.6 |
| 11 | 87.6 | 89.8 | 91.4 | 93.3 |
| 22 | 89.9 | 91.6 | 93.0 | 94.5 |
| 55 | 92.1 | 93.5 | 94.6 | 95.7 |
| 110 | 93.3 | 94.5 | 95.4 | 96.3 |
| 200 | 94.0 | 95.1 | 96.0 | 96.7 |
Source: IEC 60034-30-1:2014 (Tables 3, 5, 7, 9), nominal efficiency limits for 4-pole, 50 Hz motors. IE class limits vary by pole count, frequency and rated power — do not apply this 4-pole table to 2-pole or 6-pole motors (the calculator uses separate data sets for each pole count). Limits are defined from 0.12 kW to 1000 kW; ratings above 200 kW use the 200 kW limit, and ratings below 0.75 kW have lower limits than shown here.
About IE5: IEC 60034-30-1:2014 defines only IE1–IE4 for line-operated motors; IE5 (Ultra Premium) appears there only informatively (Annex A) with a target of approximately 20 % lower losses than IE4. Normative IE5 limits were introduced later in IEC 60034-30-1:2025. The IE5 figures used by this calculator are indicative values derived from the 20 %-lower-losses target — consult IEC 60034-30-1:2025 (or IEC TS 60034-30-2 for converter-fed motors) for exact IE5 limits.
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