Are you ready for IE3?

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

Premium Efficiency – IE3 will become mandatory in Europe

Standard IEC 60034-30-1 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 will now take effect as of 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. January 1, 2017, saw the expansion of statutory provisions on motor efficiency. Since this date, the energy efficiency class IE3 has been mandated for motors with power ratings from 0.75 to 7.5 kW, with laws now covering all motors ranging from 0.75 to 375 kW.

Less power consumption brings costs down

Change-over to energy-efficient motors pays off because they reduce energy consumption substantially and thus cut operating costs. Whatever requirement you need to meet, we have the right energy-efficient motor for you as part of our portfolio.

The IE (international efficiency) efficiency classes:

  • IE1 = Standard Efficiency

  • IE2 = High Efficiency

  • IE3 = Premium Efficiency


IE3 motors from Siemens: much more than just thrifty

The main objective of the IE3 Standard, which will apply throughout the EU since 2015, is to achieve a lasting reduction in energy consumption of electric motors that are operated direct on line and ultimately to make a contribution to the demanding European climate targets in this way. For the developers at Siemens, however, that was not enough: they provided the motors with some 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 usual reliability of your motor load feeders when you change over to IE3 motors.


Efficiency class IE3 in a nutshell:

Episode 1: The IE3 standard is approaching

Episode 2: IE3 Premium Efficiency Motors

Episode 3: Inrush current with IE3 motors

Episode 4: SIRIUS Industrial Controls

Episode 5: SIRIUS Industrial Controls and IE3 motors

Stay tuned