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DIN Standards Committee Building and Civil Engineering

Overview

This document provides the global harmonization of energy-efficiency classes of three-phase cage induction motors with rated voltage above 1 000 V that are rated for direct online starting and fixed-speed operation at a 50 Hz or 60 Hz supply with sinusoidal voltage. The scope is limited to the most common applications, namely, motors that drive the vast majority of all pumps, fans, or compressors, which accounts for approximately 80 % to 90 % of all applications. Motors for special applications, for example for accelerating loads with very high moments of inertia, for starting at very low supply voltage, for very low starting current, or for starting against high load torque, are therefore excluded from the scope of this document. By applying the document AC motors can be assigned to an efficiency class within the scope of application.

Document: references other documents

Responsible national committee

DKE/K 311 - Drehende elektrische Maschinen