IEC Standards for electric motors

Saturday - 21/04/2018 15:23
In 1999, the European Commission established different efficiency classes for electric motors to reduce energy consumption and to create awareness among various industries to the importance of a more sustainable environment.
Gear reducer motor
Gear reducer motor
These efficiency classes were called the EFF standards. However, in 2008 these EFF standards changed to the current IEC standards for electric motors to overcome the international inconsistencies in regulations between electric motor standards and efficiency classes.
 
For example, the US established the standards for electric motors, which differed a lot from the EU standards. These standards were set by a new commission called the International Electrotechnical Commission (IEC).
 
 
IE4 motors by Magnetic Innovations
 
The torque motors designed and manufactured by Magnetic Innovations already fall within the IE4 super premium efficiency class. This can result in enormous energy savings for your operations. Please contact us for more info.
 
IEC efficiency classes
 
The following IEC standards were established in 2008:
 
Efficiency Class Efficiency standard Comments
IE1 Standard efficiency 0,75 kW < P < 375 kW
(electric motor power range)
IE2 High efficiency
IE3 Premium efficiency
IE4 Super premium efficiency  
 
Since 2014 the power range was extended for electric motors and was set between 0,12 kW and 1000kW. Furthermore, since the 1st of January 2017 electric motors with a rated output of 0,75-375 kW must meet either IE3 efficiency or IE2 if fitted with VSD’s.
 
International electric motor efficiency standards
 
The following table shows a comparison between the in 2008 established IEC standards (IEC/EN 60034-20-01) and other international norms:
IEC/EN 60034-30-01 EU MEPS EISA US
EEV Canada
Other
IE1 standard efficiency     Costa Rica
Israel
Taiwan
IE2 High efficiency IE2 High efficiency NEMA EPAct Australia
Brazil
Canada
Mexico
New Zealand
IE3 Premium efficiency IE3 Premium efficiency NEMA premium efficiency Australia (new)
China 2016
Japan 2015
Korea 2015
New Zealand 2015
IE4 Super premium effiency      
 
Electric motors included by the IEC standards
 
· Single speed electric motors (single and three phase), 50 and 60 Hz
 
· Line-start permanent magnet motors
 
· 2, 4, 6 or 8 poles – Rated output PN from 0.12 kW to 1000 kW
 
· Rated voltage UN above 50 V up to 1 kV
 
· Motors, capable of continuous operation at their rated power with a temperature rise within the specified insulation temperature class
 
Electric motors excluded by the IEC standards
 
· Motors designed to operate wholly immersed in a liquid
 
· Brake motors, when the brake cannot be dismantled or separately fed.
 
· 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.
 
· Motors specifically designed to operate:
 
· At altitudes exceeding 4000 meters
 
· Where ambient air temperatures exceed 60°C
 
· In maximum operating temperatures above 400°C.
 
· Where ambient air temperatures are less than –30°C (any motor) or less than 0°C (water-cooled motors)
 
· Where the water coolant temperature at the inlet to a product is less than 0°C or exceeds 32°C
 
· In potentially explosive atmospheres as defined in Directive 94/9/EC
 
IEC specifications
 
 

Output

IE1 50Hz

IE2 50Hz

IE3 50 HZ

IE4 50Hz

kW

2 pole

4 pole

6 pole

8 pole

2 pole

4 pole

6 pole

8 pole

2 pole

4 pole

6 pole

8 pole

2 pole

4 pole

6 pole

8 pole

0,12

0,45

0,5

0,383

0,31

0,536

0,591

0,506

0,398

0,608

0,648

0,577

0,507

0,665

0,698

0,649

0,623

0,18

0,528

0,57

0,455

0,38

0,604

0,647

0,566

0,459

0,659

0,699

0,639

0,587

0,708

0,747

0,701

0,672

0,2

0,546

0,585

0,476

0,397

0,619

0,659

0,582

0,474

0,672

0,711

0,654

0,606

0,719

0,758

0,714

0,684

0,25

0,582

0,615

0,521

0,434

0,648

0,685

0,616

0,506

0,697

0,735

0,686

0,641

0,743

0,779

0,741

0,708

0,37

0,639

0,66

0,597

0,497

0,695

0,727

0,676

0,561

0,738

0,773

0,735

0,693

0,781

0,811

0,78

0,743

0,4

0,649

0,668

0,611

0,509

0,704

0,735

0,688

0,572

0,746

0,78

0,744

0,701

0,789

0,817

0,787

0,749

0,55

0,69

0,7

0,658

0,561

0,741

0,771

0,731

0,617

0,778

0,808

0,772

0,73

0,815

0,839

0,809

0,77

75

0,721

0,721

0,7

0,612

0,774

0,796

0,759

0,662

0,807

0,825

0,789

0,75

0,835

0,857

0,827

0,784

1,1

0,75

0,75

0,729

0,665

0,796

0,814

0,781

0,708

0,827

0,841

0,81

0,777

0,852

0,872

0,845

0,808

1,5

0,772

0,772

0,752

0,702

0,813

0,828

0,798

0,741

0,842

0,853

0,825

0,797

0,865

0,882

0,859

0,826

2,2

0,797

0,797

0,777

0,742

0,832

0,843

0,818

0,776

0,859

0,867

0,843

0,819

0,88

0,895

0,874

0,845

3

0,815

0,815

0,797

0,77

0,846

0,855

0,833

0,8

0,871

0,877

0,856

0,835

0,891

0,904

0,886

0,859

4

0,831

0,831

0,814

0,792

0,858

0,866

0,846

0,819

0,881

0,886

0,868

0,848

0,9

0,911

0,895

0,871

5,5

0,847

0,847

0,931

0,814

0,87

0,877

0,86

0,838

0,892

0,896

0,88

0,862

0,909

0,919

0,905

0,883

7,5

0,86

0,86

0,847

0,831

0,881

0,887

0,872

0,853

0,901

0,904

0,891

0,873

0,917

0,926

0,913

0,893

11

0,876

0,876

0,864

0,85

0,894

0,898

0,887

0,869

0,912

0,914

0,903

0,886

0,926

0,933

0,923

0,904

15

0,887

0,887

0,877

0,862

0,903

0,906

0,897

0,88

0,919

0,921

0,912

0,896

0,933

0,939

0,929

0,912

18,5

0,893

0,893

0,886

0,869

0,909

0,912

0,904

0,886

0,824

0,926

0,917

0,901

0,937

0,942

0,934

0,917

22

0,899

0,899

0,892

0,874

0,913

0,916

0,909

0,891

0,927

0,93

0,922

0,906

0,94

0,945

0,937

0,921

30

0,907

0,907

0,902

0,883

0,92

0,923

0,917

0,898

0,933

0,936

0,929

0,913

0,945

0,949

0,942

0,927

37

0,912

0,912

0,908

0,888

0,925

0,927

0,922

0,903

0,937

0,939

0,933

0,918

0,948

0,952

0,945

0,931

45

0,917

0,917

0,914

0,892

0,929

0,931

0,927

0,907

0,94

0,942

0,937

0,922

0,95

0,954

0,948

0,934

55

0,921

0,921

0,919

0,897

0,932

0,935

0,931

0,91

0,943

0,946

0,941

0,925

0,953

0,957

0,951

0,937

75

0,927

0,927

0,926

0,903

0,938

0,94

0,937

0,916

0,947

0,95

0,946

0,931

0,956

0,96

0,954

0,942

90

0,93

0,93

0,929

0,907

0,941

0,942

0,94

0,919

0,95

0,952

0,949

0,934

0,958

0,961

0,956

0,944

110

0,933

0,933

0,933

0,911

0,943

0,945

0,943

0,923

0,952

0,954

0,951

0,937

0,96

0,963

0,958

0,947

132

0,935

0,935

0,935

0,915

0,946

0,947

0,946

0,926

0,954

0,956

0,954

0,94

0,962

0,964

0,96

0,949

160

0,938

0,938

0,938

0,919

0,948

0,949

0,948

0,93

0,956

0,958

0,956

0,943

0,963

0,966

0,962

0,951

200

0,94

0,94

0,94

0,925

0,95

0,951

0,95

0,935

0,958

0,96

0,958

0,946

0,965

0,967

0,963

0,954

250

0,94

0,94

0,94

0,925

0,95

0,951

0,95

0,935

0,958

0,96

0,958

0,946

0,965

0,967

0,965

0,954

315

0,94

0,94

0,94

0,925

0,95

0,951

0,95

0,935

0,958

0,96

0,958

0,946

0,965

0,967

0,966

0,954

355

0,94

0,94

0,94

0,925

0,95

0,951

0,95

0,935

0,958

0,96

0,958

0,946

0,965

0,967

0,966

0,954

400

0,94

0,94

0,94

0,925

0,95

0,951

0,95

0,935

0,958

0,96

0,958

0,946

0,965

0,967

0,966

0,954

450

0,94

0,94

0,94

0,925

0,95

0,951

0,95

0,935

0,958

0,96

0,958

0,946

0,965

0,967

0,966

0,954

500-1000

0,94

0,94

0,94

0,925

0,95

0,951

0,95

0,935

0,958

0,96

0,958

0,946

0,965

0,967

0,966

0,954

 
IEC standards chart
 

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