IEC 60034-30-1 Efficiency Classes for Low Voltage AC Motors

IEC 60034-30-1 Efficiency Classes for Low Voltage AC Motors

The International Electrotechnical Commission (IEC) has introduced a new standard relating to energy efficient motors.

IEC 60034-30-1, published on 6th March 2014, harmonizes the currently different requirements for induction motor efficiency levels around the world. Compared to previous IEC 60034-30: 2008; it significantly expands the range of products covered with the inclusion of 8-pole motors and introduces IE4 efficiency class for electric motors.

IEC 60034-30-1: 2014 defines four IE (International Efficiency) efficiency classes of single speed, electric motors that are rated to IEC 60034-1 or IEC 60079-0 (explosive atmospheres) and designed for operation on sinusoidal voltage.

    IE1  = Standard efficiency (efficiency levels roughly equivalent to EFF2 in Europe nowadays)

    IE2  = High efficiency (efficiency levels roughly equivalent to EFF1 in Europe nowadays and identical to EPAct in USA for 60 Hz)

    IE3  = Premium efficiency (efficiency levels in Europe nowadays and identical to “NEMA Premium” in the USA for 60Hz)

    IE4  = Super Premium efficiency (new efficiency levels above IE3)

    IE5  = (efficiency levels under envisaged for future revision, with the goal of further reducing by some 20% relative to IE4)

Efficiency Chart

Efficiency levels defined in IEC 60034-30-1 are based on new test methods specified in IEC 60034-2-1: 2007 which has been updated to edition 2.0, 2014-06.

With the new measuring technique, the stray load losses are no longer assumed to be a lump sum value of 0.5%. Instead, they are indirectly calculated by making measurements to determine efficiency values more accurately.

This means that the nominal efficiencies decrease from EFF1 to IE2 or EFF2 to IE1 respectively, although nothing changes at the motor – neither technically nor physically.

Previously: Pɩɩ = 0.5% as lump sum value
Now: Pɩɩ = individual measurement
Pɩɩ refers to “load-dependent stray-load losses”

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IEC 60034-30-1 covers all technical constructions of electric motors as long as they are rated for direct on-line operation. The coverage of the new standard includes:

    Single-speed electric motors (single and three-phase), 50 Hz and 60 Hz

    2, 4, 6 or 8-pole

    Rated output from 0.12 kW to 1000 kW

    Rated voltage UN above 50V up to 1 kV

    Motors, capable of continuous operation at their rated power with a temperature rise within the specified insulation temperature class

    Motors, marked with any ambient temperature within the range of -20 °C to +60 °C

    Motors, marked with an altitude up to 4000 m above sea level

Following motors are excluded from IEC 60034-30-1:
    Single-speed motors with 10 or more poles or multi-speed motors

    Motors completely integrated into a machine (for example, pump, fan or compressor) that cannot be tested separately from the machine.

    Brake motors, when the brake can not be dismantled or separately fed.
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Table with efficiency classes: IE 60034-30-1:2014 for 50 Hz

Rated
Power

Standard
Efficiency

(IE1, 50 Hz)

High
Efficiency

(IE2, 50 Hz)

Premium
Efficiency

(IE3, 50 Hz)

Super
Premium
Efficiency
(IE4, 50 Hz)

Number
of poles

Number
of poles

Number
of poles

Number
of poles
kW 2 4 6 8 2 4 6 8 2 4 6 8 2 4 6 8
0.12 45.0 50.0 38.3 31.0 53.6 59.1 50.6 39.8 60.8 64.8 57.7 50.7 66.5 69.8 64.9 62.3
0.18 52.8 57.0 45.5 38.0 60.4 64.7 56.6 45.9 65.9 69.9 63.9 58.7 70.8 74.7 70.1 67.2
0.20 54.6 58.5 47.6 39.7 61.9 65.9 58.2 47.4 67.2 71.1 65.4 60.6 71.9 75.8 71.4 68.4
0.25 58.2 61.5 52.1 43.4 64.8 68.5 61.6 50.6 69.7 73.5 68.6 64.1 74.3 77.9 74.1 70.8
0.37 63.9 66.0 59.7 49.7 69.5 72.7 67.6 56.1 73.8 77.3 73.5 69.3 78.1 81.1 78.0 74.3
0.40 64.9 66.8 61.1 50.9 70.4 73.5 68.8 57.2 74.6 78.0 74.4 70.1 78.9 81.7 78.7 74.9
0.55 69.0 70.0 65.8 56.1 74.1 77.1 73.1 61.7 77.8 80.8 77.2 73.0 81.5 83.9 80.9 77.0
0.75 72.1 72.1 70.0 61.2 77.4 79.6 75.9 66.2 80.7 82.5 78.9 75.0 83.5 85.7 82.7 78.4
1.1 75.0 75.0 72.9 66.5 79.6 81.4 78.1 70.8 82.7 84.1 81.0 77.7 85.2 87.2 84.5 80.8
1.5 77.2 77.2 75.2 70.2 81.3 82.8 79.8 74.1 84.2 85.3 82.5 79.7 86.5 88.2 85.9 82.6
2.2 79.7 79.7 77.7 74.2 83.2 84.3 81.8 77.6 85.9 86.7 84.3 81.9 88.0 89.5 87.4 84.5
3 81.5 81.5 79.7 77.0 84.6 85.5 83.3 80.0 87.1 87.7 85.6 83.5 89.1 90.4 88.6 85.9
4 83.1 83.1 81.4 79.2 85.8 86.6 84.6 81.9 88.1 88.6 86.8 84.8 90.0 91.1 89.5 87.1
5.5 84.7 84.7 83.1 81.4 87.0 87.7 86.0 83.8 89.2 89.6 88.0 86.2 90.9 91.9 90.5 88.3
7.5 86.0 86.0 84.7 83.1 88.1 88.7 87.2 85.3 90.1 90.4 89.1 87.3 91.7 92.6 91.3 89.3
11 87.6 87.6 86.4 85.0 89.4 89.8 88.7 86.9 91.2 91.4 90.3 88.6 92.6 93.3 92.3 90.4
15 88.7 88.7 87.7 86.2 90.3 90.6 89.7 88.0 91.9 92.1 91.2 89.6 93.3 93.9 92.9 91.2
18.5 89.3 89.3 88.6 86.9 90.9 91.2 90.4 88.6 92.4 92.6 91.7 90.1 93.7 94.2 93.4 91.7
22 89.9 89.9 89.2 87.4 91.3 91.6 90.9 89.1 92.7 93.0 92.2 90.6 94.0 94.5 93.7 92.1
30 90.7 90.7 90.2 88.3 92.0 92.3 91.7 89.8 93.3 93.6 92.9 91.3 94.5 94.9 94.2 92.7
37 91.2 91.2 90.8 88.8 92.5 92.7 92.2 90.3 93.7 93.9 93.3 91.8 94.8 95.2 94.5 93.1
45 91.7 91.7 91.4 89.2 92.9 93.1 92.7 90.7 94.0 94.2 93.7 92.2 95.0 95.4 94.8 93.4
55 92.1 92.1 91.9 89.7 93.2 93.5 93.1 91.0 94.3 94.6 94.1 92.5 95.3 95.7 95.1 93.7
75 92.7 92.7 92.6 90.3 93.8 94.0 93.7 91.6 94.7 95.0 94.6 93.1 95.6 96.0 95.4 94.2
90 93.0 93.0 92.9 90.7 94.1 94.2 94.0 91.9 95.0 95.2 94.9 93.4 95.8 96.1 95.6 94.4
110 93.3 93.3 93.3 91.1 94.3 94.5 94.3 92.3 95.2 95.4 95.1 93.7 96.0 96.3 95.8 94.7
132 93.5 93.5 93.5 91.5 94.6 94.7 94.6 92.6 95.4 95.6 95.4 94.0 96.2 96.4 96.0 94.9
160 93.8 93.8 93.8 91.9 94.8 94.9 94.8 93.0 95.6 95.8 95.6 94.3 96.3 96.6 96.2 95.1
200 94.0 94.0 94.0 92.5 95.0 95.1 95.0 93.5 95.8 96.0 95.8 94.6 96.5 96.7 96.3 95.4
250 94.0 94.0 94.0 92.5 95.0 95.1 95.0 93.5 95.8 96.0 95.8 94.6 96.5 96.7 96.5 95.4
315 94.0 94.0 94.0 92.5 95.0 95.1 95.0 93.5 95.8 96.0 95.8 94.6 96.5 96.7 96.6 95.4
355 94.0 94.0 94.0 92.5 95.0 95.1 95.0 93.5 95.8 96.0 95.8 94.6 96.5 96.7 96.6 95.4
400 94.0 94.0 94.0 92.5 95.0 95.1 95.0 93.5 95.8 96.0 95.8 94.6 96.5 96.7 96.6 95.4
450 94.0 94.0 94.0 92.5 95.0 95.1 95.0 93.5 95.8 96.0 95.8 94.6 96.5 96.7 96.6 95.4
500-
1000		 94.0 94.0 94.0 92.5 95.0 95.1 95.0 93.5 95.8 96.0 95.8 94.6 96.5 96.7 96.6 95.4
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