IEC 60034-2-2:2010 pdf free download.Rotating electrical machines – Part 2-2: Specific methods for determining separate losses of large machines from tests – Supplement to IEC 60034-2-1.
machines électriques tournantes – partie 2 -2 méthodes spécifiques pour déterminer les pertes séparées des machines de grande taille à partir d ‘ essais complément à la cel 60034 -2 -1.
IEC 60034-2-2:2010 applies to large rotating electrical machines and establishes additional methods of determining separate losses and to define an efficiency supplementing IEC 60034-2-1. These methods apply when full-load testing is not practical and result in a greater uncertainty.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
IEC 60034-1, Rotating electrical machines — Part 1: Rating and performance
IEC 60034-2-1, Rotating electrical machines — Part 2-1: Standard methods for determining losses and efficiency from tests (excluding machines for traction vehicles).
5 Basic requirements
5.1 DIrect and indirect efficiency determination Tests can be grouped in the following categories.
5.1.1 Direct
Input-output measurements on a single machine are considered to be direct. This involves the measurement of electrical or mechanical power into, and mechanical or electrical power out of a machine.
5.1.2 Indirect
Measurements of the separate losses in a machine under a particular condition are considered to be indirect. This is not usually the total loss but comprises certain loss components. The method may, however, be used to calculate the total loss or to calculate a loss component.
The test machine shall be completely assembled as for normal operation.
During testing the test machine temperature and the coolant temperature shall be kept as close to normal operating conditions as possible.
Following assembly of the machine, determine the area of the reference surface. Divide the surface into 10 to 15 approximately equal area segments and attach thermal detectors to each segment. Install sufficient thermal detectors in the ambient air to determine the most accurate average temperature rise.