Basic Info
Introduction
IEC 60034-2-2:2010 ROTATING ELECTRICAL MACHINES - PART 2-2: SPECIFIC METHODS FOR DETERMINING SEPARATE LOSSES OF LARGE MACHINES FROM TESTS
Scope
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
NOTE In situ testing according to the calorimetric method for full-load conditions is recognize
The specific methods described are
- Calibrated-machine metho
- Retardation metho
- Calorimetric metho
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.
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