Are you ready for IE3?

Comprehensive legislation has been passed in the European Union in order to reduce power consumption and carbon emissions. Stay prepared with Siemens.


The IE (international efficiency) classes:

  • IE1 = Standard Efficiency

  • IE2 = High Efficiency

  • IE3 = Premium Efficiency

Premium Efficiency – IE3 will become mandatory in Europe
Standard IEC 60034-30 defines the energy efficiency classes for asynchronous motors. Regulations (EC) 640/2009 and 04/2014 establish the conditions for the conversion to the new energy-efficient technology. IE2 has been in place as the minimum efficiency since 2011. The second stage took effect January 1, 2015. Only motors in the power range from 7.5 to 375 kW complying with Energy Efficiency Class IE3 will be permitted for line operation in the European economic area from that date. This is a legal requirement.

Less power consumption brings costs down
Change-over to energy-efficient motors pays off because they reduce energy consumption and cut operating costs. Whatever requirement you need to meet, we have the right energy-efficient motor for you.

IE3 motors from Siemens
The main objective of the IE3 Standard, which will apply throughout the EU from 2015, is to achieve a lasting reduction in energy consumption of electric motors that are operated direct on line. The other objective is to make a contribution to the demanding European climate targets. Siemens took an extra step and provided additional virtues in the process, alongside the energy efficiency that you can take for granted.

IE3 motors have a different behavior
The energy savings of IE3 motors are mainly based on lower nominal currents. However, starting currents are higher for technical reasons, especially the so-called inrush current of IE3 motors is noticeably higher in direct comparison with IE2 models. But each motor has a different behavior, and the data sheets of the motors do not provide any information on inrush currents. That’s why we performed comprehensive analyses and looked into the behavior of a vast number of motors from various manufacturers. The result: A number of factors need to be considered before switching to IE3.

SIRIUS Industrial Controls for IE3 motors: optimized for higher starting currents
As IE3 motors are characterized by significantly higher inrush currents compared with IE2 models, current monitoring in Industrial Controls needs to be adapted to avoid spurious tripping. In addition, the switching capacity and the current carrying capacity of the Industrial Controls has to be increased. That’s why the latest generation of SIRIUS Industrial Controls has been optimized accordingly on the basis of extensive analyses of the starting characteristics of IE3 motors. With SIRIUS Industrial Controls, you can continue to depend on the reliability of your motor load feeders when you change over to IE3 motors.


Episode 1

Episode 2


The IE3 standard is approaching

 Episode 1: The IE3 standard is approaching

IE3 Premium Efficiency Motors

 Episode 2: IE3 Premium Efficiency Motors

Episode 3

Episode 4


Inrush current with IE3 motors

 Episode 3: Inrush current with IE3 motors

SIRIUS Industrial Controls

 Episode 4: SIRIUS Industrial Controls

Episode 5


SIRIUS Industrial Controls and IE3 motors

 Episode 5: SIRIUS Industrial Controls and IE3 motors

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