Energy-efficient low-voltage motors

When compared to conventional motors, three-phase motors with Premium efficiency have an efficiency that is up to 10% higher. Further, by using frequency converters for uncontrolled drives, an additional 60% energy can be saved.

  • The family of 1LE1 motors has been rounded-off: in the aluminum series, two shaft heights in the small frame sizes have been added. Further, a complete motor series with cast iron frames extending from 750 Watts up to 200 kW was presented at the Hanover Fair. All motors are available in efficiency classes IE2 and IE3.

  • The new motors are especially user-friendly and are equipped with large terminal boxes that are diagonally split. In shaft heights 80 and 90, the terminal box can even be adjusted and connected at any angle between 0° and 360° – for faster installation and commissioning.

  • For the area of validity of EU Regulation 640/2009, Siemens now offers IEC motors from 750 W all the way up to 375 kW in efficiency classes IE2 and IE3. This means that Siemens already fulfills the requirements regarding a minimum efficiency that are legally stipulated after the 16th June 2011. Further, motors that are certified according to EISA in the Energy Efficient and Premium Efficiency classes for the NAFTA market are available.

  • The induction motors are suitable for all applications in the production and process industries. For pump and fan applications, variable-speed drive systems can slash energy costs by 70% in extreme cases when compared to mechanical control systems.

The High and Premium efficiency motors are part of the Siemens environmental portfolio. In 2010, based on our products and solutions, customers reduced their carbon dioxide emissions (CO2) by 270 million tons, which equates to the total annual CO2 emission of Hong Kong, London, New York, Tokyo, Delhi and Singapore together.


PROFIenergy means coordinated energy saving in production breaks. Consumers that are not needed are switched off automatically. Energy values are measured cost-efficiently and in detail – independently of manufacturer and device.

  • Present hardware and software can easily be integrated into energy management.

  • Individual consumers or complete partial areas of production can be easily switched on and off from a central position while other automation components continue to run during the break.

This results in energy savings of up to 80 % in long and 40 % in short breaks. Automated system-start-up ensures that production can be taken up again at the intended time. You will save energy costs as well as direct production costs without impairing production.