+39 0444 491 973 info@vemat.it DOWNLOAD CATALOGUE Home Our Company Energy Efficiency Products Download Certificates Contact New Efficiency Classes for Low-Voltage 3-phase Motors Along with the international discussion on energy efficiency, a worldwide harmonized energy efficiency classification system has been established for low voltage three-phase asynchronous motors. The efficiency factor defines the efficiency of motors when transforming electrical into mechanical energy. For many years low-voltage three-phase motors have been sold in the European Union in three efficiency classes EFF3, EFF2 and EFF1. Aside from this, many different efficiency classification systems have been introduced and well-proven in many countries all over the world. They differ from each other in terms of scope, wording and values. That was the reason for the International Electrotechnical Commission IEC to develop and publish an energy efficiency standard which replaces all the previous national issues. Parallelly IEC developed and issued a new standard for determining motor efficiency. The new IEC 60034-30 standard defines and harmonizes the worldwide efficiency classes IE1, IE2 and IE3 for low-voltage three-phase motors. According to IEC 60034-30 standard and EU regulation 640/2009, 4/2014 starting from 1st January 2017, only IE3 Energy Efficiency motors from 0,75 kW to 375 kW can be sold. The above mentioned efficiency classes were defined for general purpose motors with synchronous speed of 3000rpm or 1500rpm and with rated power from 1,1kW to 90kW (400V – 50Hz). The agreed minimum levels of the respective classes are based on efficiency measurements according to the old IEC 60034-2 standard. New international efficiency classes of motors (IE = International Efficiency) The new IEC 60034-30 standard defines the following efficiency classes of low-voltage three-phase asynchronous motors in the power range from 0,75kW to 375kW worldwide: IE1 = Standard Efficiency (comparable to EFF1) IE2 = High Efficiency (comparable to EFF2) IE3 = Premium Efficiency From now on motors can be offered and sold within the new IE1, IE2 and IE3 classes. In that case, efficiency has to be determined according to the new measuring standard (IEC 60034-2-1). Vemat Motori S.r.l. Plant and administrative headquarters: Via Gualda 10 36075 Montecchio Maggiore – Vicenza Registered office: Via Pantano 2 20122 Milano Tel. +39 0444 491973 r.a. Fax +39 0444 491978 PEC vemat@legalmail.it info@vemat.it Home Our Company Energy Efficiency Products Download Certificates Contact R.E.A. di Milano 1016531 Partita IVA 04483030153 Cap. Soc. € 104.000,00 i.v. credits - Privacy Policy × Notice This website or its third-party tools use cookies, which are necessary to its functioning and required to achieve the purposes illustrated in the cookie policy. If you want to know more or withdraw your consent to all or some of the cookies, please refer to the . By closing this banner, scrolling this page, clicking a link or continuing to browse otherwise, you agree to the use of cookies.