New energy efficiency classes: FAQs

In the following we provide answers to frequently asked questions regarding the new energy efficiency classes.

When will the catalogs be changed over?

On 01.10.2009, the News Catalog D81.1 N • October 2009 was released. It includes all news regarding new efficiencies, the new nominal voltage stamp, new options etc. Under the following link you can download the catalog free of charge.

What is the difference between the standard IEC 60034-30:2008) and the EU Regulation No. 640/2009?

The EU Regulation defines the efficiency classes according to which the motors are labeled and defines for which motor versions the standard should be applied. From the standard alone, there is no specific mandate to construct or label motors with a certain minimum efficiency.

The EU Regulation 640/2009 defines bindingly – in the European Economic Area (EEA) – the minimum efficiency class that low-voltage motors must comply with by law starting 16.6.2011. It refers to standard IEC 60034-30:2008.

Summarizing: The EU Regulation specifies in the EEA by law the minimum efficiencies that motors must comply with in the future. The efficiencies are taken from IEC 60034-30 and must be measured according to 60034-2-1:2007.

When will the IE-values be changed over in the electronic media (e.g. CA01, Mall, Configurators, etc.) and how does the changeover to IE influence our tools like DT configurator, SinaSave, SIZER?

Effective 01.10.2009, the electronic media were changed over to the new nomenclature IE. DT configurator: The database for motors is already on the basis of International Efficiency. Alternatively the technical data for EFF can be looked up. That means the data sheets can be exported already with the IE values and the new currents.Also refer to

SinaSave: In December 2009, the new IE values where imported into SinaSave automatically. SinaSave has no interface to other engineering tools. The IE changeover only has influence on the payback time.Also refer to

SIZER: The affected motor data were imported in April 2010 via automatic update . The motors now show the new IE class and current values. For all motors in the range between 0.75 and 375kW the nomenclature and the technical data changed.

What exceptions are permissible according to EU Regulation 640/2009? Motors:

  • motors designed to operate wholly immersed in a liquid

  • motors completely integrated into a product (for example gear, pump, fan or compressor) of which the energy performance cannot be tested independently from the product

  • motors specifically designed to operate:
    - at altitudes exceeding 1000 metres above sea-level
    - where ambient air temperatures exceed 40 °C
    - in maximum operating temperature above 400 °C
    - where ambient air temperatures are less than – 15 °C for any motor
    - where the water coolant temperature at the inlet to a product is less than 5 °C or 
      exceeding 25 °C
    - in potentially explosive atmospheres as defined in Directive 94/9/ECof the European
      Parliament and of the Council

brake motors

Also refer to the official notification from the European Commission EC 640/2009 or

Do we have a transition strategy that we can present to our customers during the changeover to IE?

Yes, we draw-up the transition strategy individually together with our customers. Please ask your Siemens contact person, he will give you more information.

Will there still be motors with increased power available in the future,?

Already today there is a broad spectrum of motors available with increased power output in efficiency class IE2. It is planned, that these motors will be available in all of the future motor series – also for the IE2 efficiency. Currently these motors are available on request.

Are synchronous motors affected by the EU Regulation No. 640/2009?

No. The definition in the EU Regulation No. 640/2009 is only applicable for induction motors. Synchonous motors can be measured using the new measuring technique and classified, however, from the perspective of the EU Regulation No.640/2009 there is no legal obligation.

What is the situation with IE4 motors?

In the standard IEC 60034-30 IE4 is defined as super-premium. However there is no agreement with which technology motors can reach the IE4 values. The values are regulated in the technical specification TS IEC 60034-31, but this is only a technical recommendation and no engaging standard. That means IE4 is technical probable, but not required in any technical law.

For which motors is the new standard IEC 60034-30 valid which is in place since 2008?

The standard IEC 60034-30:2008 defines efficiency classes of three-phase-low-voltage motors in the power range 0,75 kW up to 375 kW at 50 and 60 Hz world-wide. The following efficiency classes were defined:

IE1 = Standard efficiency

IE2 = High efficiency

IE3 = Premium Efficiency

In Europe the IEC 60034-30 replaces voluntary agreements like CEMEP with one standard and the efficiency values are now comparable worldwide.

In Europe the IEC 60034-30 replaces voluntary agreements like CEMEP with one standard and the efficiency values are now comparable worldwide.

How do countries outside the european union react to the minimum efficiencies?

Worldwide, there are two major standards that define efficiency. One is IEC (= International Electrotechnical Commission) for the European and ‘Eastern part’ of the world – and on the other hand is NEMA (NEMA = National Electrical Manufacturers Association) for North America.In addition to the European Union and associated countries, China and Brazil are also making the high IE2 efficiency class mandatory.

Overview over the global efficiency standards in different countries, which are already in place or will be effective in the near future.

Overview over the global efficiency standards in different countries, which are already in place or will be effective in the near future.

Are my EFF2-/ IE1 motors now out of date?

The motors that have been installed in plants and systems correspond to the regulations valid at the time that they were commissioned. From a technical perspective, the motors are still at a high level and may be operated. From June 2011 onwards, manufacturers are not allowed to market IE1 motors any longer. For you as customer this means that you are still allowed to install the remaining stock.

From when can IE2 motors be supplied?

Complete series that comply with the IE1 and IE2 efficiency standard are already available today. Besides the standard IE1 motors on stock, there are additionally various IE2 motors that are available ex-stock.

Can IE1 motors still be used if there are problems relating to dimensions after june 16, 2011?


Are explosion-proof motors affected by the IE changeover?

In the current legal text of the EU regulation 640/2009, they are excluded. This means that our 1MA/1MJ motor series are legally not affected. Explosion-proof motors are listed in standard IEC60034-30:2008; however, in this case, explosion-proof must always be taken into consideration with a higher priority. The 1LA7/9 and 1LA6/1LG4 motors that are used in hazardous zones 2, 21, 22, will have a rating plate with the new IE1 / IE2 nomenclature. Siemens has voluntarily agreed to stamp the IE1 / IE2 efficiencies on the rating plate for these motor types.

Via Loher we offer a complete spectrum of IE1 and IE2 motors. The IE3 motor spectrum is already available or in the setup phase.

How is the efficiency now determined?

From November 2010 all motor manufacturers have to determine the efficiencies according to the new measuring regulation IEC 60034-2-1:2007. The classification according IEC 60034-30:2008 regulates this method by law. The stray load losses are no longer assumed to be a lump sum value of 0.5%; instead, they are determined by making measurements.

After 16.06.2011, can I still obtain spare parts for my IE1/2 motors?

Yes. The rules apply the same as before.

For the rating plates, what will change?

The following will be new:

  • IE Class logo

  • absolute value of the efficiency

  • only one rated voltage

  • temperature Tamb 40°C, i.e. no temperature range is indicated

  • indication of the manufacturing country e.g. Made in Germany

  • indication of the rated voltage

For the rating plates, what will change

For machine builders when should they do the changeover for their motors?

For machine builders we strongly recommend to commence with the design changeover to IE2 motors right now since this draws perhaps constructional changes of the machines/plants. The earlier the planning begins the longer is the time slot up to the legal obligation. Thus delivery bottlenecks will be avoided. Depending on the branch, it must be estimated how much time it takes from the inquiry over the quotation to project engineering and finally the implementation.