Motor Efficiency Labelling Scheme for Rotating Electrical Machines

This document from Brook Crompton outlines the European motor efficiency labelling scheme, defining the EFF1, EFF2, and EFF3 efficiency classes for industrial motors. It details how adopting high-efficiency motors contributes to significant energy savings, environmental protection, and compliance with EU initiatives.

Key Points

  • EFF Classification System: Motors are classified into three efficiency bands—EFF1 (highest), EFF2, and EFF3—based on performance standards endorsed by the European Commission.
  • Targeted Motor Range: The scheme applies to 2- and 4-pole TEFV squirrel cage induction motors rated 1.1 to 90 kW at 400V, 50Hz.
  • Efficiency Metrics: Detailed efficiency tables (page 3) illustrate performance thresholds for each class across various motor sizes.
  • Application Guidance: Efficiency class selection recommendations based on motor usage patterns—occasional (EFF3), regular (EFF2), and continuous (EFF1).
  • Environmental and Economic Benefits: Using higher-efficiency motors leads to lower energy consumption, reduced emissions, and shorter payback periods through cost savings.
  • Brook Crompton’s Role: The company actively supports the scheme and offers a wide range of premium EFF1 motors under its "WP" product line.
  • Sustainability Objectives: The goal is to phase out EFF3 motors and promote greener options, with ongoing monitoring by CEMEP and the European Commission.
  • Additional Features: Brook Crompton motors include high reliability, cool running, low noise, and compatibility with international standards (IEC, NEMA, Japanese).