Abstract

Specifies the calculation of efficiency (mainly of large generators) from the summation of individual losses or from measurement of total losses, where the losses are deduced from the heat produced by them and dissipated by the coolants or in the surrounding media. This Standard is based on IEC 34-2A:1974.

Scope

This Standard specifies methods for determining losses and efficiency that have been devised mainly for large generators, but the principles used can also be applied to other machines.

The calorimetric method can be used to determine the efficiency of electrical rotating machinery either -
(a) by the determination of the total losses on load; or
(b) by the determination of the segregated losses and hence the conventional total loss by summation of the segregated losses.

Depending upon the circumstances, calorimetric measurements may be made in two different ways as follows:
(i) Measurement of the quantity and rise in temperature of the cooling medium (direct method).
(ii) Calibration of the rise in temperature of the cooling medium.

The calorimetric measurements should be performed for each cooling circuit, either primary or secondary, separately.

The symbols used are shown in Table 1.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	Standards Australia
ProductNote	Pending Revision indicates that as a result of the Aged Standards review process, the document needs updating. If no project proposal, meeting the quality criteria, is received within the 12 month timeframe, the document shall be withdrawn.
Pages
ISBN
Committee	EL-009
Supersedes	AS 1359.33-1983 DR 96092