IEC 60034-2-2:2010 pdf free download

11-03-2020 comment

IEC 60034-2-2:2010, Rotating electrical machines – Part 2-2: Specific methods for determining separate losses of large machines from tests – Supplement to IEC 60034-2-1.
EC 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
IEC 60034-1, Rotating electrical machines-Part 1: Rating and performance;
IEC 60034-2-1, Rotating electrica 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.
5.3 Preferred methods
It is difficult to establish specific rules for the determination of efficiency. The choice of test to be made depends on the information required, the accuracy required, the type and size of the machine involved and the available field test equipment (supply, load or driving machine).
Preferred methods for large machines are given in Table 1.

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