High Efficiency motors; IE2, IE3
The term “High efficiency” relates to electric motors which have a higher efficiency than “normal motors” and it has the origin in the former “CEMEP” – voluntary agreement among motor manufacturers. The aim of the CEMEP agreement was to encourage manufacturing and use of electric motors using less energy for the benefit of less harmful environmental impact.
Due to the use of better materials (copper, iron, etc.) in the motor manufacturing, the price of a high efficiency motor is higher than the price of an equivalent motor with lower efficiency. However, the extra price for a High efficiency motor is usually recovered in a short time through a lower energy consumption. ( e.g: try the Energy saving calculator: here)
In 2011 the voluntary CEMEP agreement will be replaced by new legislation in force throughout the EU and described in European Commission Regulation No: 640/2009. Moreover, the International Electrotechnical Commission (IEC), has established new measuring methods (described in IEC 60034-2-1:2007) and defined new classes of efficiencies for electric motors, the latter described in International Standard: IEC30034-30: 2008
As a consequence of the definitions in IEC 60034-30:2008, the general rule is that all *) 3-phase, 2 -. 4 – and 6-pole low voltage motors (Un <1000V) for continuous operation (S1 and S3> 80%) and with output from 0.75 to 375 kW must be covered by one of the following categories:
IE1 = standard efficiency.
IE2 = high efficiency
IE3 = premium efficiency
All measurements of efficiency must be made according to IEC 60034-2-1:2007 and the IE. – category has to be marked on the nameplate
*): Exceptions can be:
-Motors for “S2-operation or S3 <80% to S10
-Motors specifically designed for variable speed control according to IEC60034-25
-Motors specifically designed and integrated into the application in such a way that it is not possible to measure the motor on its own.
As a consequence of The European Commission Regulation No: 640/2009, the following deadlines must be respected for motors placed on the EU Markets:
From 16 June 2011: all **) motors (which are covered by IEC 60034-30:2008) placed for the first time on the market, shall have a minimum efficiency class of IE2
From 1 January 2015: all **) motors (which are covered by IEC 60034-30:2008) with a rated output between 7.5 – 375 kW shall have a minimum efficiency class of IE3 or minimum IE2 if they are operated/equipped with an electronic speed control.
From 1 January 2017: all **) motors (which are covered by IEC 60034-30:2008) with rated outputs of 0.75 to 375 kW shall have a minimum efficiency class of IE3 or minimum IE2 if they are operated/equipped with an electronic speed control.
**): Exceptions to the above rules may be:
Motors designed to operate completely submerged in a liquid.
Motors operating at altitudes > 4000 m above sea level
Motors designed for operation in temperature ranges > 60 deg.C and <-30 deg. C
Motors designed for operation in potentially explosive atmospheres
The Commission Regulation nr. 640/2009, can be found on the European Commission Homepage
http://eur-lex.europa.eu/JOHtml.do?uri=OJ:L:2009:191:SOM:en:HTML (pdf. no. 26)
Horsepower Scandinavia can offer energy efficient motors in all the above categories. – for any further information please see:
energy efficient motors and: high performance motors or take contact by mail: email@example.com