Minimum efficiency by class — IEC 60034-30-1, 50 Hz (%)
kW
IE1 4p
IE2 4p
IE3 4p
IE4 4p
IE3 2p
IE3 6p
0.75
72.1
79.6
82.5
85.7
80.7
78.9
1.1
75.0
81.4
84.1
87.2
82.7
81.0
1.5
77.2
82.8
85.3
88.2
84.2
82.5
2.2
79.7
84.3
86.7
89.5
85.9
84.3
3
81.5
85.5
87.7
90.4
87.1
85.6
4
83.1
86.6
88.6
91.1
88.1
86.8
5.5
84.7
87.7
89.6
91.9
89.2
88.0
7.5
86.0
88.7
90.4
92.6
90.1
89.1
11
87.6
89.8
91.4
93.3
91.2
90.3
15
88.7
90.6
92.1
93.9
91.9
91.2
18.5
89.3
91.2
92.6
94.2
92.4
91.7
22
89.9
91.6
93.0
94.5
92.7
92.2
30
90.7
92.3
93.6
94.9
93.3
92.9
37
91.2
92.7
93.9
95.2
93.7
93.3
45
91.7
93.1
94.2
95.4
94.0
93.7
55
92.1
93.5
94.6
95.7
94.3
94.1
75
92.7
94.0
95.0
96.0
94.7
94.6
90
93.0
94.2
95.2
96.1
95.0
94.9
110
93.3
94.5
95.4
96.3
95.2
95.1
132
93.5
94.7
95.6
96.4
95.4
95.4
160
93.8
94.9
95.8
96.6
95.6
95.6
200+
94.0
95.1
96.0
96.7
95.8
95.8
EU Ecodesign — what a new motor must be
Output
Minimum
Applies to
0.12–0.75 kW
IE2
2, 4, 6, 8-pole — since 1 Jul 2021
0.75–1000 kW
IE3
2, 4, 6, 8-pole — since 1 Jul 2021
75–200 kW
IE4
2, 4, 6-pole — since 1 Jul 2023
Ex eb motors
IE2
0.12–1000 kW — since 1 Jul 2023
IE1 standard · IE2 high · IE3 premium · IE4 super
premium. NEMA Premium in North America sits at about IE3. One class up
is 1–3 points of efficiency: on an 11 kW motor running 6,000 h a year,
IE2 → IE3 saves about 1,300 kWh.
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