Motor efficiency determination: from testing laboratory to plant installation

IEEE 112 B has become the method of choice for laboratory environment efficiency testing. However, no strategy for low level intrusion testing of field applications has been able to achieve the same level of widespread acceptance. This paper compares the goals, techniques employed and key points of interest of the standardized IEEE 112 B laboratory test with a technique using a minimum level of intrusion for the field testing of induction motors. Development of the latter has been completed and is currently being tested.