Method for determining losses and efficiency of three-phase cage induction motors
|Publication Date:||1 November 2002|
|ICS Code (Rotating machinery in general):||29.160.01|
This International Standard is applicable to three-phase cage induction motors and establishes two methods for determination of efficiency:
• Method 1: for motors tested by using a torque measurement device, with additional load losses derived from measurements;
• Method 2: for motors tested without torque measurement, with assigned additional load losses.
The two methods are different in the procedure to obtain the additional load losses. Unless otherwise specified, method 1 should be used for motors up to 150 kW.
For other methods of efficiency estimation, see IEC 60034-2.