# The Ecodesign for Energy-Related Products and Energy Information Regulations 2021, Paragraph 3: Energy efficiency requirements for motors


(1) IE is set out in Tables 21 to 26, for different values of the motor rated output power PN at 50 Hz or 60 Hz.
(2) IE classes are determined at rated output power (PN), rated voltage (UN), and based on 25 °C ambient reference temperature.
(3) For 50/60 Hz motors, the requirements in Tables 21 to 26 must be met at both 50Hz and 60 Hz at the rated output power specified for 50 Hz.
(4) For 50Hz motors the requirements in Tables 21 to 23 must be met at 50 Hz at the rated output power specified for 50 Hz.
(5) For 60Hz motors the requirements in Tables 24 to 26 must be met at 60 Hz at the rated output power specified for 60 Hz.
(6) Losses must be determined in accordance with Schedule 17.
Table 21
Minimum efficiencies (ηn) for IE2 efficiency level at 50 Hz (per cent)
Rated output power PN[kW]
2 poles
4 poles
6 poles
8 poles
0.12
53.6
59.1
50.6
39.8
0.18
60.4
64.7
56.6
45.9
0.20
61.9
65.9
58.2
47.4
0.25
64.8
68.5
61.6
50.6
0.37
69.5
72.7
67.6
56.1
0.40
70.4
73.5
68.8
57.2
0.55
74.1
77.1
73.1
61.7
0.75
77.4
79.6
75.9
66.2
1.1
79.6
81.4
78.1
70.8
1.5
81.3
82.8
79.8
74.1
2.2
83.2
84.3
81.8
77.6
3
84.6
85.5
83.3
80.0
4
85.8
86.6
84.6
81.9
5.5
87.0
87.7
86.0
83.8
7.5
88.1
88.7
87.2
85.3
11
89.4
89.8
88.7
86.9
15
90.3
90.6
89.7
88.0
18.5
90.9
91.2
90.4
88.6
22
91.3
91.6
90.9
89.1
30
92.0
92.3
91.7
89.8
37
92.5
92.7
92.2
90.3
45
92.9
93.1
92.7
90.7
55
93.2
93.5
93.1
91.0
75
93.8
94.0
93.7
91.6
90
94.1
94.2
94.0
91.9
110
94.3
94.5
94.3
92.3
132
94.6
94.7
94.6
92.6
160
94.8
94.9
94.8
93.0
200 up to 1,000
95.0
95.1
95.0
93.5
Table 22
Minimum efficiencies (ηn) for IE3 efficiency level at 50 Hz (per cent)
Rated output power PN[kW]
2 poles
4 poles
6 poles
8 poles
0.12
60.8
64.8
57.7
50.7
0.18
65.9
69.9
63.9
58.7
0.20
67.2
71.1
65.4
60.6
0.25
69.7
73.5
68.6
64.1
0.37
73.8
77.3
73.5
69.3
0.40
74.6
78.0
74.4
70.1
0.55
77.8
80.8
77.2
73.0
0.75
80.7
82.5
78.9
75.0
1.1
82.7
84.1
81.0
77.7
1.5
84.2
85.3
82.5
79.7
2.2
85.9
86.7
84.3
81.9
3
87.1
87.7
85.6
83.5
4
88.1
88.6
86.8
84.8
5.5
89.2
89.6
88.0
86.2
7.5
90.1
90.4
89.1
87.3
11
91.2
91.4
90.3
88.6
15
91.9
92.1
91.2
89.6
18.5
92.4
92.6
91.7
90.1
22
92.7
93.0
92.2
90.6
30
93.3
93.6
92.9
91.3
37
93.7
93.9
93.3
91.8
45
94.0
94.2
93.7
92.2
55
94.3
94.6
94.1
92.5
75
94.7
95.0
94.6
93.1
90
95.0
95.2
94.9
93.4
110
95.2
95.4
95.1
93.7
132
95.4
95.6
95.4
94.0
160
95.6
95.8
95.6
94.3
200 up to 1,000
95.8
96.0
95.8
94.6
Table 23
Minimum efficiencies (ηn) for IE4 efficiency level 50 Hz (per cent)
Rated output power PN[kW]
2 poles
4 poles
6 poles
8 poles
0.12
66.5
69.8
64.9
62.3
0.18
70.8
74.7
70.1
67.2
0.20
71.9
75.8
71.4
68.4
0.25
74.3
77.9
74.1
70.8
0.37
74.3
77.9
74.1
70.8
0.40
78.9
81.7
78.7
74.9
0.55
81.5
83.9
80.9
77.0
0.75
83.5
85.7
82.7
78.4
1.1
85.2
87.2
84.5
80.8
1.5
86.5
88.2
85.9
82.6
2.2
88.0
89.5
87.4
84.5
3
89.1
90.4
88.6
85.9
4
90.0
91.1
89.5
87.1
5.5
90.9
91.9
90.5
88.3
7.5
91.7
92.6
91.3
89.3
11
92.6
93.3
92.3
90.4
15
93.3
93.9
92.9
91.2
18.5
93.7
94.2
93.4
91.7
22
94.0
94.5
93.7
92.1
30
94.5
94.9
94.2
92.7
37
94.8
95.2
94.5
93.1
45
95.0
95.4
94.8
93.4
55
95.3
95.7
95.1
93.7
75
95.6
96.0
95.4
94.2
90
95.8
96.1
95.6
94.4
110
96.0
96.3
95.8
94.7
132
96.2
96.4
96.0
94.9
160
96.3
96.6
96.2
95.1
200 up to 249
96.5
96.7
96.3
95.4
250 up to 314
96.5
96.7
96.5
95.4
315 up to 1,000
96.5
96.7
96.6
95.4
Table 24
Minimum efficiencies (ηn) for IE2 efficiency level at 60 Hz (per cent)
Rated output power PN [kW]
Number of poles
2
4
6
8
2
4
6
8
0.12
59.5
64.0
50.5
40.0
0.18
64.0
68.0
55.0
46.0
0.25
68.0
70.0
59.5
52.0
0.37
72.0
72.0
64.0
58.0
0.55
74.0
75.5
68.0
62.0
0.75
75.5
78.0
73.0
66.0
1.1
82.5
84.0
85.5
75.5
1.5
84.0
84.0
86.5
82.5
2.2
85.5
87.5
87.5
84.0
3.7
87.5
87.5
87.5
85.5
5.5
88.5
89.5
89.5
85.5
7.5
89.5
89.5
89.5
88.5
11
90.2
91.0
90.2
88.5
15
90.2
91.0
90.2
89.5
18.5
91.0
92.4
91.7
89.5
22
91.0
92.4
91.7
91.0
30
91.7
93.0
93.0
91.0
37
92.4
93.0
93.0
91.7
45
93.0
93.6
93.6
91.7
55
93.0
94.1
93.6
93.0
75
93.6
94.5
94.1
93.0
90
94.5
94.5
94.1
93.6
110
94.5
95.0
95.0
93.6
150
95.0
95.0
95.0
93.6
185
95.4
95.4
95.0
93.6
220
95.4
95.4
95.0
93.6
250
95.4
95.4
95.0
93.6
300
95.4
95.4
95.0
93.6
335
95.4
95.4
95.0
93.6
375 up to 1000
95.4
95.8
95.0
94.1
Table 25
Minimum efficiencies (ηn) for IE3 efficiency level at 60 Hz (per cent)
Rated output power PN [kW]
Number of poles
2
4
6
8
2
4
6
8
0.12
62.0
66.0
64.0
59.5
0.18
65.6
69.5
67.5
64.0
0.25
69.5
73.4
71.4
68.0
0.37
73.4
78.2
75.3
72.0
0.55
76.8
81.1
81.7
74.0
0.75
77.0
83.5
82.5
75.5
1.1
84.0
86.5
87.5
78.5
1.5
85.5
86.5
88.5
84.0
2.2
86.5
89.5
89.5
85.5
3.7
88.5
89.5
89.5
86.5
5.5
89.5
91.7
91.0
86.5
7.5
90.2
91.7
91.0
89.5
11
91.0
92.4
91.7
89.5
15
91.0
93.0
91.7
90.2
18.5
91.7
93.6
93.0
90.2
22
91.7
93.6
93.0
91.7
30
92.4
94.1
94.1
91.7
37
93.0
94.5
94.1
92.4
45
93.6
95.0
94.5
92.4
55
93.6
95.4
94.5
93.6
75
94.1
95.4
95.0
93.6
90
95.0
95.4
95.0
94.1
110
95.0
95.8
95.8
94.1
150
95.4
96.2
95.8
94.5
185
95.8
96.2
95.8
95.0
220
95.8
96.2
95.8
95.0
250
95.8
96.2
95.8
95.0
300
95.8
96.2
95.8
95.0
335
95.8
96.2
95.8
95.0
375 up to 1000
95.8
96.2
95.8
95.0
Table 26
Minimum efficiencies (ηn) for IE4 efficiency level at 60 Hz (per cent)
Rated output power PN [kW]
Number of poles
2
4
6
8
2
4
6
8
0.12
66.0
70.0
68.0
64.0
0.18
70.0
74.0
72.0
68.0
0.25
74.0
77.0
75.5
72.0
0.37
77.0
81.5
78.5
75.5
0.55
80.0
84.0
82.5
77.0
0.75
82.5
85.5
84.0
78.5
1.1
85.5
87.5
88.5
81.5
1.5
86.5
88.5
89.5
85.5
2.2
88.5
91.0
90.2
87.5
3.7
89.5
91.0
90.2
88.5
5.5
90.2
92.4
91.7
88.5
7.5
91.7
92.4
92.4
91.0
11
92.4
93.6
93.0
91.0
15
92.4
94.1
93.0
91.7
18.5
93.0
94.5
94.1
91.7
22
93.0
94.5
94.1
93.0
30
93.6
95.0
95.0
93.0
37
94.1
95.4
95.0
93.6
45
94.5
95.4
95.4
93.6
55
94.5
95.8
95.4
94.5
75
95.0
96.2
95.8
94.5
90
95.4
96.2
95.8
95.0
110
95.4
96.2
96.2
95.0
150
95.8
96.5
96.2
95.4
185
96.2
96.5
96.2
95.4
220
96.2
96.8
96.5
95.4
250
96.2
96.8
96.5
95.8
300
96.2
96.8
96.5
95.8
335
96.2
96.8
96.5
95.8
375 up to 1000
96.2
96.8
96.5
95.8

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Source: https://www.legislation.gov.uk/ukdsi/2021/9780348222920/schedule/16/paragraph/3 (the official version)
Page: https://openlegislation.uk/draft-ecodesign-for-energy-related-products-and-energy-information-regulations-2021/schedule-16/paragraph-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.