Efficiency classes for IEC line motors

Standard IEC Line Motors (IEC 60034-30-1)

In March 2014 the standard IEC 60034-30-1 has been published. It replaces the standard IEC 60034-30:2008, which has defined three efficiency levels for three-phase induction motors to date. The updated standard IEC 60034-30-1 now includes the fourth efficiency level IE4. Furthermore 8-pole motors and an extended power range are now included in the standard.

Efficiency classes

In the IEC 60034-30-1 the following efficiency classes are defined for induction motors (IE = International Efficiency :


Scope

The standard IEC 60034-30-1:2014 defines efficiency levels and classes at 50 and 60 Hz for single or three-phased line motors (regardless of the technology). The scope of the standard, as well as its exceptions, is defined there.

The revised standard includes the following line-motors

Number of poles

2, 4, 6, 8

Power range

0,12 – 1.000 kW

Level

IE1 - Standard Efficiency
IE2 - High Efficiency
IE3 - Premium Efficiency
IE4 - Super Premium Efficiency

Voltage

< 1000 V, 50/60 Hz

Degree of protection

all

Operating mode

S1 (permanent operation with constant load); motors, that are designed for different operating modes but can still be operated permanently with rated output.

Degree of temperature

-20°C - +60°C

Altitude

Up to 4.000 m above sea level

Geared motors

yes

Smoke Extraction Motors with a temperature class up to 400°C

yes

Validity

Standard IEC 60034-30-1 valid since  March 2014

Exceptions:

  • Motors for a speed of 10 or more poles, as well as motors, that are designed for variable speed.

  • Motors with mechanical commutators (e.g. DC-motors).

  • Motors, which are completely integrated into a machine (e.g. pumps, fans and compressors) and simply cannot be tested on their own, even if bearings and bearing shields are temporarily used on the drive-end site.

  • Motors with integrated frequency converters (compact-drives), if the motor cannot be tested separately from the converter. The efficiency-classification of compact-drives has to be based on the complete PDS (Power Drive System) and therefore has to be defined in a separate norm.

  • Brake motors, if the brake is an integral component of the inner motor-construction and can be neither removed nor separately operated during the testing of motor-efficiency.

  • Submersible motor, which are specifically designed to be operated completely immersed in liquid.

  • Smoke Extraction Motors with a temperature-class of over 400 °C.


Coverage of IEC 60034-30-1

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    Legislation EU Regulation 640/2009

    Standards and regulations

    In the European Union, wide ranging legislation has been ratified with the objective to reduce energy usage and in turn CO2 emissions. EU Regulation 640/2009 and the supplement 04/2014 involve energy usage and/or the energy efficiency of induction motors in the industrial environment. In the meantime, this regulation is valid in all countries belonging to the European Union.
    The standard IEC 60034-30-1:2014 defines efficiency classes for 50 and 60 Hz and stipulates, worldwide, which motors are involved and which exceptions apply. The EU Regulation is essentially based on this standard.

    Nomenclature

    In IEC 60034-30-1 efficiency classes for induction motors are defined (IE = International Efficiency):


    Efficiency classes IE1-IE4 according IEC 60034-30-1 and the scope according to EU regulation 640/2009

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      Timeline

      The changes become effective on these dates:

      Since June 16, 2011:
      The legally specified minimum efficiency IE2 for induction motors in S1 duty must be maintained according to the EU regulation.

      Since July 27, 2014:
      Expansion of EU Regulation 640/2009  with EU Regulation 04/2014.

      Since January 1, 2015:
      The legally specified minimum efficiency IE3 must be maintained for power ratings from 7.5 kW to 375 kW or an IE2 motor plus frequency inverter.

      From January 1, 2017:
      The legally specified minimum efficiency IE3 must be maintained for power ratings from 0.75 kW up to 375 kW or an IE2 motor plus inverter.

      Scope

      Motors involved: EU Regulation 640/2009 and 04/2014 based on standard IEC 60034-30

      Description

      The EU Regulation is valid in all EU countries.
      IEC 60034-2-1: 200 is the basis for determining losses and therefore determining the efficiency.

      Number of poles

      2, 4, 6

      Power range

      0.75 - 375 kW

      Level

      IE1 - Standard Efficiency
      IE2 - High Efficiency
      IE3 - Premium Efficiency

      Voltage

      < 1000 V, 50/60 Hz

      Degree of protection

      all

      Geared motors

      yes

      Validity

      Standard IEC 60034-30-1 valid since March 2014; the EU Regulation has been in force since June 16, 2011. Manufacturers are no longer allowed to market IE1 motors in the European Economic Area.

      Exceptions in the EU Regulation

      Valid since July 27, 2014

      At altitudes above 4,000 m above sea level

      For ambient temperatures above 60 °C

      For ambient temperatures below -30 °C (any motor) or below 0 °C (water-cooled motor)

      For coolant temperatures at the intake of a product below 0 °C or above 32 °C

      Exceptions that have not changed:
      Motors that have been designed to be operated completely immersed in liquid
      Motors completely integrated in a product (e.g. a gearbox, a pump, a fan or a compressor), whose energy efficiency cannot be determined independent of this product
      Motors that have been specifically designed for operation under the following conditions:
      − At extremely high operating temperatures above 400 °C
      − In hazardous zones in the sense of Directive 94/9/EC of the European Parliament and the Council
      Brake motors

      The following are not involved:

      • 8-pole motors

      • Pole-changing motors

      • Synchronous motors

      • Motors for intermittent duty S2 ... S9

      • Motors that have been specifically developed for inverter operation

      • Single-phase motors


      Your energy-efficient future

      By making the decision to use energy efficient drives, you can lower your energy costs and have a positive effect on the environment.
      Analyzing the drive technology in your plant or system can open up an energy saving potential that you never imagined. We can help you do this with suitable tools, for instance SinaSave Energy Efficiency Tool or the App SIMOTICS EE-COMPARATOR to calculate the payback time of drives, and with our products – a secure investment in an efficient future!

      The whole spectrum in IE3

       

      SIMOTICS GP
      General Purpose

      SIMOTICS SD
      Severe Duty

      SIMOTICS XP
      Explosion protected

      SIMOTICS DP
      Definite Purpose

      SIMOTICS TN
      Non-standard

      Housing material

      Aluminium

      Cast iron

      Aluminium or
      Cast iron

      Aluminium or
      Cast iron

      Cast iron

      Power range

      0.09 … 45 kW

      0.75 … 315 kW

      0.09 … 1000 kW

      0.37 … 481 kW

      200 … 3500 kW

      Legal requirements

      Minimum efficiency IE3 from 1.1.2015 from 7.5 kW

      Minimum efficiency IE3 from 1.1.2015 from 7.5 kW

      Are not affected by minimum efficiencies but are available in IE3 in a broad range

      Are affected by minimum efficiencies in a broad range (e.g. ship, smoke extraction)

      Minimum efficiency IE3 from 1.1.2015 up to 375 kW

      Applications and branches

      Pumps, fans, compressors, with specific requirements relating to low weight and the highest efficiency

      Pumps, fans, compressors, marine applications, offshore, mixers, crushers, extruders, rolling mills with special requirements regarding the ruggedness, especially in the chemical and petrochemical industries

      For general industrial applications with special requirements relating to explosion protection, e.g. in the process industry

      Special motors, for example transport and working roller tables, ventilating tunnels, parking garages, shopping malls, port cranes, container terminals

      Pumps, fans, compressors, mixers, extruders in the chemical and petrochemical industry, paper machines, mining, cement, steel industry, marine applications incl. propulsion

      Further information

      siemens.com/simotics-gp

      siemens.com/simotics-sd

      siemens.com/simotics-xp

      siemens.com/simotics-dp

      siemens.com/simotics-n-compact