High-Efficiency Asynchronous Motors Available Throughout Efficiency Classes IE2 and IE3

09.03.2011

The Siemens Drive Technologies Division now offers IEC motors consistently across the efficiency classes IE2 and IE3 covering the application range of EU Regulation 640/2009 from 750 W to 375 kW.

High-Efficiency Asynchronous Motors Available Throughout Efficiency Classes IE2 and IE3

The Siemens Drive Technologies Division now offers IEC motors consistently across the efficiency classes IE2 and IE3 covering the application range of EU Regulation 640/2009 from 750 W to 375 kW.

Furthermore, the motors are available for the NAFTA market with EISA-certification in the Energy Efficiency and Premium Efficiency classes. The asynchronous motors are designed for all applications in the manufacturing and process industries.

The minimum efficiency class IE2 will become mandatory in the European economic region on June 16, 2011, after which manufacturers will only be permitted to sell high-efficiency motors. The EU Regulation 640/2009 applies to low voltage asynchronous motors within the range of 0.75 to 375 kW. As from January 2015, efficiency class IE3 will become mandatory for all motor outputs between 7.5 kW and 375 kW. Alternatively, an IE2 motor can be used with a frequency converter.

In accordance with this European regulation, Siemens now offers asynchronous AC motors across both efficiency classes High Efficiency (IE2) and Premium Efficiency (IE3). The IE3 motors have particularly compact dimensions, which has been achieved by the use of improved rotor technology. IE3 is offered with the same shaft height as IE2, which means that the mechanical interface to the unit remains the same. As the improved efficiency can often even be achieved using the same housing, the user does not need to modify the mechanical design of the machine. This reduces the engineering costs.

For the NAFTA market, the IEC motors are available in the Premium Efficiency and Energy Efficient classes certified according to the EISA (Energy Independence and Security Act). This complies with the efficiency requirements that have applied in the USA since last year. Further country-specific versions are planned which are designed to meet the specific legal and safety requirements in each case.

Siemens offers the new IEC motors in two different series: General Purpose and Severe Duty. The General Purpose motors with aluminum housings and shaft heights of between 80 and 160 and an output of 550 W to 22 kW are used mainly for pumps, fans and compressors. The Severe Duty version has a particularly rugged cast iron housing which makes it suitable for use in tough conditions such as those found in the process industry. It is available in the power range from 2.2 kW to 375 kW and with shaft heights between 100 and 315.

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