Rotating electrical machines Equivalent loading and super-position techniques Indirect testing to determine temperature rise
|Publication Date:||1 January 2002|
|ICS Code (Rotating machinery in general):||29.160.01|
This International Standard applies to machines covered by IEC 60034-1 when they cannot be loaded to a specific condition (rated or otherwise) for whatever reason. It is applicable to both motors and generators but the methods are not suitable for machines of and below 1 kW.
The object of this standard is to provide descriptions of various indirect load tests, the purpose of which is to determine the temperature rise of rotating electrical machines, including a.c. induction machines, a.c. synchronous machines and d.c. machines. The test methods in some cases provide, in addition, a means of measuring or estimating other parameters such as losses and vibration, but the methods are not designed specifically to provide such data.
The proposed methods of test are considered equivalent, the choice of them relying only on the location, the testing apparatus and the kind of machine, and the test result accuracy.
It is not intended that this standard be interpreted as requiring the carrying out of any or all of the tests described therein on any given machine. The particular tests to be carried out are subject to a special agreement between the manufacturer and the purchaser.
As the methods reproduce only approximately the thermal conditions of the machines which occur under normal rated condition, temperature-rise measurement results achieved from tests with these methods can be taken as the basis for the evaluation of machine heating according to 7.10 of IEC 60034-1 by agreement between the manufacturer and the purchaser.