AS 60146.1.3-2002

1 - AS 60146.1.3-2002 SEMICONDUCTOR CONVERTERS - GENERAL REQUIREMENTS AND LINE COMMUTATED CONVERTERS-TRANSFORMERS AND REACTORS
4 - PREFACE
5 - CONTENTS
7 - 1 Scope
7 - 2 Normative references
8 - 3 Rated values for converter transformers
8 - 3.1 Rated current values
8 - 3.1.1 Single converter or double converter supplied from one common cell winding
8 - 3.1.2 Double converter where each thyristor assembly has separate cell windings
8 - 3.2 Temperature limits of cooling media
8 - 3.2.1 Air cooled outdoor equipment
8 - 3.2.2 Air cooled indoor equipment
8 - 3.2.3 Water cooled equipment
8 - 4 Losses and voltage drops in transformers and reactors
8 - 4.1 Losses in the transformer windings
9 - 4.2 Losses in interphase transformers, current balancing reactors, series-smoothing reactors, transductors and other current regulating accessories
9 - 4.2.1 lnterphase transformers
9 - 4.2.2 Current balancing reactors
9 - 4.2.3 Series-smoothing reactors
9 - 4.2.4 Transductors and other current regulating accessories
10 - 4.3 Voltage drops in transformers and reactors
10 - 5 Tests for converter transformers
10 - 5.1 Measurement of commutating reactance and determination of inductive voltage drop (type test)
10 - 5.1.1 Commutating reactance
10 - 5.1.2 Inductive voltage regulation
11 - 5.2 Short-circuit test (type test and routine test)
11 - 5.3 Temperature rise test (type test)
15 - Annex A - Corrections to be applied when cooling medium temperature is higher than standard

Specifies characteristics where converter transformers differ from ordinary power transformers. This Standard has been reproduced from and is technically identical to IEC 60146-1-3:1991.

This Part 1-3 of the International Standard relates, in general, to those characteristics wherein converter transformers differ from ordinary power transformers. In all other respects, the rules specified in IEC 76 shall apply to converter transformers also, as far as they are not in contradiction with this Standard.It should be borne in mind that a rectifier transformer operates with non-sinusoidal current waveshape. In single-way connection, the current in each cell winding contains a d.c. component which calls for special attention in design and testing. In some cases, a special design is necessary when external short-circuits and cell failures would cause abnormal stress.For certain types of transformers, the waveshape of the normal operating voltage is non-sinusoidal. The core loss of such equipment is to be determined by applying a sinusoidal voltage having the same half-cycle arithmetic mean value and the same fundamental frequency as the voltage applied in service.

First published as part of AS 1955.1-1977.
Revised and redesignated in part as AS 60146.1.3-2002.