A practical set-up for a standard test procedure on polyphase induction motors

The paper describes a practical set-up for testing low voltage, polyphase induction motors. The measured efficiency of an induction motor depends on the method and the standard according to which the measurements are performed. A short description of different standards as IEEE 112 and IEC 32 is given and the main discrepancies are mentioned. The measurement equipment for electrical and mechanical quantities and the employed data acquisition system are discussed. Reference is made to industrial measurements. Experimental results are discussed in detail.