IEC Motor Efficiency Laws and Classification Standards
This document from Siemens outlines the regulatory changes in IEC motor efficiency classifications, detailing the transition from older EFF standards to the new IE1 through IE4 levels. It provides insights into new measuring techniques, legal timelines, and motor compliance requirements in both the EU and U.S.
Key Points
- Efficiency Classifications Updated: New IEC 60034-30 efficiency classes—IE1 (Standard), IE2 (High), IE3 (Premium), and IE4 (Super Premium)—replace the older EFF standards.
- U.S. Compliance via EISA: EISA replaces EPAct in 2010, mandating NEMA Premium (IE3) for many motor categories.
- Technical Changes on Rating Plates: Efficiency, voltage, and current labeling revised to reflect new standards—voltage ranges are no longer shown.
- Siemens Compliance: Siemens transitioned to IE nomenclature from 2009 and offers a wide selection of IE1 and IE2 motors in stock.
- EU Regulation 640/2009: Legal mandates require motors in the EU to meet minimum IE2 efficiency as of June 16, 2011, with progressive tightening to IE3 by 2017.
- Accurate Efficiency Measurement: IEC 60034-2-1:2007 requires actual measurement of stray load losses, ending the use of lump-sum estimates.
- Motor Exceptions: Certain motors like brake motors, submersible types, and motors in hazardous environments are exempt from the regulations.
- Support Tools Available: Tools like SinaSave help calculate energy savings and payback periods when upgrading to energy-efficient motors.