IEC 62032:2005

INTERNATIONAL IEC
STANDARD 62032
First edition
2005-03
IEEE
™
C57.135
Guide for the application, specification,
and testing of phase-shifting transformers

Reference number
IEC 62032(E):2005
IEEE Std. C57.135(E):2001
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INTERNATIONAL IEC
STANDARD 62032
First edition
2005-03
IEEE
™
C57.135
Guide for the application, specification,
and testing of phase-shifting transformers

Copyright © IEEE 2005 ⎯ All rights reserved
IEEE is a registered trademark in the U.S. Patent & Trademark Office, owned by the Institute of Electrical and Electronics Engineers, Inc.
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
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Telephone: +1 732 562 3800 Telefax: +1 732 562 1571 E-mail: stds-info@ieee.org Web: www.standards.ieee.org
Commission Electrotechnique Internationale
International Electrotechnical Commission
Международная Электротехническая Комиссия

– 2 –
IEEE C57.135-2001(E)
CONTENTS
FOREWORD.4
IEEE Introduction.7
1. Overview. 8
1.1 Scope. 8
1.2 Purpose. 8
2. References. 8
3. Definitions. 9
4. Application and theory of PSTs. 11
4.1 Introduction.11
4.2 Basic principle of application—advanced and retard phase angl e . 11
4.3 The PST under load . 12
4.4 Power transfer . 13
4.5 Types of PSTs. 15
4.6 Special on load tap changer (OLTC) features. 19
4.7 Arrangement of more than one PST . 21
4.8 Design criteria. 22
5. Service conditions. 23
5.1 Usual service conditions . 23
5.2 Loading at other than rated conditions. 24
5.3 Unusual service conditions . 24
5.4 Protection . 25
6. Rating data . 28
6.1 Polarity, angular displacement, and terminal markings. 29
6.2 Impedance. 29
6.3 Nameplates. 29
7. Construction. 29
7.1 Enclosed throat connections . 30
7.2 Liquid insulation and preservation system . 30
8. Short-circuit characteristics . 30
8.1 Short circuit requirements. 30
9. Control system . 31
9.1 Control equipment and accessories. 31
9.2 Requirements . 31
9.3 Test code for control systems . 33
Published by IEC under licence from IEEE. © 2005 IEEE. All rights reserved.

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IEEE C57.135-2001(E)
10. Testing of PSTs. 34
10.1 General. 34
10.2 Special tests for PSTs. 35
11. Tolerances. 35
11.1 General. 35
11.2 Tolerances for ratio of series and main units. 36
11.3 Tolerance for phase angle and impedance. 36
12. Bid document checklist. 36
12.1 Nontechnical information . 36
12.2 Technical information. 36
12.3 Special requirements or conditions. 37
12.4 Additional information. 38
Annex A (informative) Bibliography. 39
Annex B (informative) Differences of graphical symbols for diagrams between IEC 60617-DB:2001
and IEEE C57.135:2001 . 41
Annex C (informative) List of Participants. 42
Published by IEC under licence from IEEE. © 2005 IEEE. All rights reserved.

– 4 –
IEEE C57.135-2001(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
GUIDE FOR THE APPLICATION, SPECIFICATION,
AND TESTING OF PHASE-SHIFTING TRANSFORMERS

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization
comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to
promote international co-operation on all questions concerning standardization in the electrical and
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Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter
referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National
Committee interested in the subject dealt with may participate in this preparatory work. International,
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IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with
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2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an
international consensus of opinion on the relevant subjects since each technical committee has
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patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC/IEEE 62032 has been processed through IEC Technical
Committee 14: Power transformers.
The text of this standard is based on the following documents:
IEEE Std FDIS Report on voting
C57.135 (2001) 14/491/FDIS 14/494/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
Attention is drawn to the fact that a certain number of graphical symbols used in this IEEE
publication differ from the IEC graphical symbols laid down in IEC 60617.
Consequently, an Annex B has been created outlining the differences in the graphical
symbols for diagrams between IEEE C57.135:2001 and IEC 60617. This annex is not
exhaustive and only mentions the equivalences of the most important symbols used.
Once the IEC/IEEE publication has been revised, Annex B will be deleted and the graphical
symbols will be put in line with IEC 60617.
The committee has decided that the contents of this publication will remain unchanged until
2006.
Published by IEC under licence from IEEE. © 2005 IEEE. All rights reserved.

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IEEE C57.135-2001(E)
IEC/IEEE Dual Logo International Standards
This Dual Logo International Standard is the result of an agreement between the IEC and the Institute of
Electrical and Electronics Engineers, Inc. (IEEE). The original IEEE Standard was submitted to the IEC for
consideration under the agre
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