SIEMENS
1/5
Siemens D 83.1 · 2016
1
Introduction
General information regarding efficiency in accordance with International Efficiency
Efficiency classes and efficiencies according to IEC 60034-30-1
■
Overview
Standardization of the efficiency classes
Different energy efficiency standards exist worldwide
for induction motors. To promote international standardization,
the international standard IEC 60034-30-1 03/2014 (Rotating
electrical machines – Part 30: Efficiency classes of single-
speed, three-phase, cage-induction motors (IE code)) was
created. This groups low-voltage asynchronous motors into new
efficiency classes (first released in October 2008).
Applicability (excerpt)
•
Low-voltage motors up to 1000 V
(50/60 Hz with line operation)
•
Power: 0.12 to 1000 kW; with 2, 4, 6 or 8 poles
•
Operating mode: S1
The efficiencies in IEC 60034-30-1 are based on the method
for determining losses according to IEC 60034-2-1:2014.
IE efficiency classes
The efficiency classes are grouped according to the following
nomenclature (IE = International Efficiency):
•
IE1 (Standard Efficiency)
•
IE2 (High Efficiency)
•
IE3 (Premium Efficiency)
•
IE4 (Super Premium Efficiency)
Comparison of IE efficiency classes
Note:
All efficiency classes are stated with reference to 50 Hz data
(unless specified otherwise).
Measuring method according to IEC 60034-2-1:2014
for determining the efficiency
With this measuring method, motor losses are no longer applied
as a percentage, but are determined by standard methods. The
nominal efficiencies are therefore reduced from EFF1 to IE2 and
from EFF2 to IE1, even though there have been no technical or
physical changes to the motors.
Previously:
P
LL
= 0.5 % of
P
1
was added (IEC 60034-2)
Now:
P
LL
= individual measurement (IEC 60034-1)
P
LL
= Load-dependent supplementary losses
IE1 to IE4 efficiencies, 4-pole, 50 Hz, according to the power rating
Minimum efficiencies according to IEC 60034-30-1:2014
IEC 60034-30-1
NEMA-MG1
GB 18613-2012
IE4
1)
Grade 1 (IE4)
IE3
Premium efficient (60 Hz)
Grade 2 (IE3)
IE2
Energy efficient (60 Hz)
Grade 3 (IE2)
45
75 110 200 500
100
90
80
85
75
70
65
%
kW
kW
11
3
37
55
90 132 375 630
800
1000
4
30
15
20
G_D081_EN_00473a
Classification
acc. to IEC 60034-30-1:2014
Output
Efficiency
1.5
5.5
0.75
1.1 2.5
7.5
18.5
1)
Defined in IEC/TS 60034-31.
Rated power
Efficiency
in %
IEC IE class
P
rated, 50 Hz
IE1
– Standard Efficiency
IE2
– High Efficiency
kW
2-pole
4-pole
6-pole
8-pole
2-pole
4-pole
6-pole
8-pole
0.18
52.8
57.0
45.5
38.0
60.4
64.7
56.6
45.9
0.20
54.6
58.5
47.6
39.7
61.9
65.9
58.2
47.4
0.25
58.2
61.5
52.1
43.4
64.8
68.5
61.6
50.6
0.37
63.9
66.0
59.7
49.7
69.5
72.7
67.6
56.1
0.40
64.9
66.8
61.1
50.9
70.4
73.5
68.8
57.2
0.55
69.0
70.0
65.8
56.1
74.1
77.1
73.1
61.7
0.75
72.1
72.1
70.0
61.2
77.4
79.6
75.9
66.2
1.1
75.0
75.0
72.9
66.5
79.6
81.4
78.1
70.8
1.5
77.2
77.2
75.2
70.2
81.3
82.8
79.8
74.1
2.2
79.7
79.7
77.7
74.2
83.2
84.3
81.8
77.6
3
81.5
81.5
79.7
77.0
84.6
85.5
83.3
80.0
4
83.1
83.1
81.4
79.2
85.8
86.6
84.6
81.9
5.5
84.7
84.7
83.1
81.4
87.0
87.7
86.0
83.8
7.5
86.0
86.0
84.7
83.1
88.1
88.7
87.2
85.3
11
87.6
87.6
86.4
85.0
89.4
89.8
88.7
86.9
15
88.7
88.7
87.7
86.2
90.3
90.6
89.7
88.0
18.5
89.3
89.3
88.6
86.9
90.9
91.2
90.4
88.6
22
89.9
89.9
89.2
87.4
91.3
91.6
90.9
89.1
30
90.7
90.7
90.2
88.3
92.0
92.3
91.7
89.8
37
91.2
91.2
90.8
88.8
92.5
92.7
92.2
90.3
45
91.7
91.7
91.4
89.2
92.9
93.1
92.7
90.7
55
92.1
92.1
91.9
89.7
93.2
93.5
93.1
91.0
75
92.7
92.7
92.6
90.3
93.8
94.0
93.7
91.6
90
93.0
93.0
92.9
90.7
94.1
94.2
94.0
91.9
110
93.3
93.3
93.3
91.1
94.3
94.5
94.3
92.3
132
93.5
93.5
93.5
91.5
94.6
94.7
94.6
92.6
160
93.8
93.8
93.8
91.9
94.8
94.9
94.8
93.0
200 … 1000
94.0
94.0
94.0
92.5
95.0
95.1
95.0
93.5
Rated power
Efficiency
in %
IEC IE class
P
rated, 50 Hz
IE3
– Premium Efficiency
IE4
– Super Premium Efficiency
kW
2-pole
4-pole
6-pole
8-pole
2-pole
4-pole
6-pole
8-pole
0.18
65.9
69.9
63.9
58.7
70.8
74.7
70.1
67.2
0.20
67.2
71.1
65.4
60.6
71.9
75.8
71.4
68.4
0.25
69.7
73.5
68.6
64.1
74.3
77.9
74.1
70.8
0.37
73.8
77.3
73.5
69.3
78.1
81.1
78.0
74.3
0.40
74.6
78.0
74.4
70.1
78.9
81.7
78.7
74.9
0.55
77.8
80.8
77.2
73.0
81.5
83.9
80.9
77.0
0.75
80.7
82.5
78.9
75.0
83.5
85.7
82.7
78.4
1.1
82.7
84.1
81.0
77.7
85.2
87.2
84.5
80.8
1.5
84.2
85.3
82.5
79.7
86.5
88.2
85.9
82.6
2.2
85.9
86.7
84.3
81.9
88.0
89.5
87.4
84.5
3
87.1
87.7
85.6
83.5
89.1
90.4
88.6
85.9
4
88.1
88.6
86.8
84.8
90.0
91.1
89.5
87.1
5.5
89.2
89.6
88.0
86.2
90.9
91.9
90.5
88.3
7.5
90.1
90.4
89.1
87.3
91.7
92.6
91.3
89.3
11
91.2
91.4
90.3
88.6
92.6
93.3
92.3
90.4
15
91.9
92.1
91.2
89.6
93.3
93.9
92.9
91.2
18.5
92.4
92.6
91.7
90.1
93.7
94.2
93.4
91.7
22
92.7
93.0
92.2
90.6
94.0
94.5
93.7
92.1
30
93.3
93.6
92.9
91.3
94.5
94.9
94.2
92.7
37
93.7
93.9
93.3
91.8
94.8
95.2
94.5
93.1
45
94.0
94.2
93.7
92.2
95.0
95.4
94.8
93.4
55
94.3
94.6
94.1
92.5
95.3
95.7
95.1
93.7
75
94.7
95.0
94.6
93.1
95.6
96.0
95.4
94.2
90
95.0
95.2
94.9
93.4
95.8
96.1
95.6
94.4
110
95.2
95.4
95.1
93.7
96.0
96.3
95.8
94.7
132
95.4
95.6
95.4
94.0
96.2
96.4
96.0
94.9
160
95.6
95.8
95.6
94.3
96.3
96.6
96.2
95.1
200
95.8
96.0
95.8
94.6
96.5
96.7
96.3
95.4
250
95.8
96.0
95.8
94.6
96.5
96.7
96.5
95.4
315 … 1000
95.8
96.0
95.8
94.6
96.5
96.7
96.6
95.4
© Siemens AG 2016