IEC 60034-2-1:2007

Applies to d.c. machines and to a.c. synchronous and induction machines. The principles can be applied to other types of machines such as rotary converters, a.c. commutator motors and single-phase induction motors for which other methods of determining losses are used.

This amendment mainly contains an annex which describes provisional methods for determining losses and efficiency of concerter-fed cage induction machines

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.

IEC 60034-2-1:2014(B) is intended to establish methods of determining efficiencies from tests, and also to specify methods of obtaining specific losses. This standard applies to d.c. machines and to a.c. synchronous and induction machines of all sizes within the scope of IEC 60034-1. This new edition includes the following significant technical changes with respect to the previous edition: grouping of the test methods into preferred methods and methods for field or routine testing; addition of the details of the requirements regarding instrumentation; addition of the description of tests required for a specific method in the same sequence as requested for the performance of the test.