Power transformers - Part 21: Standard requirements, terminology, and test code for step-voltage regulators

IEC 60076-21:2011/IEEE Std C57.15:2009 - Description of design types, tables of 50 Hz and 60 Hz ratings, supplementary ratings, construction, and available accessories are provided. Methods for performing routine and design tests applicable to liquid-immersed single and three-phase step-voltage regulators are described. Winding resistance measurements, polarity tests, insulation power factor and resistance tests, ratio tests, no load loss and excitation current measurements, impedance and load loss measurements, dielectric tests, temperature tests, routine and design impulse tests, short-circuit tests, control tests, calculated data, and certified test data are covered.

General Information

Status
Published
Publication Date
14-Dec-2011
Technical Committee
Current Stage
DELPUB - Deleted Publication
Completion Date
07-Dec-2018
Ref Project

Relations

Buy Standard

Standard
IEC 60076-21:2011 - Power transformers - Part 21: Standard requirements, terminology, and test code for step-voltage regulators Released:12/15/2011
English language
103 pages
sale 15% off
Preview
sale 15% off
Preview

Standards Content (Sample)


IEC 60076-21
Edition 1.0 2011-12

IEEE Std C57.15
INTERNATIONAL
STANDARD
Power transformers –
Part 21: Standard requirements, terminology, and test code for step-voltage
regulators
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.

Unless otherwise specified, 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 IEC Central Office.

Any questions about IEEE copyright should be addressed to the IEEE. Enquiries about obtaining additional rights

to this publication and other information requests should be addressed to the IEC or your local IEC member National

Committee.
IEC Central Office The Institute of Electrical and Electronics Engineers, Inc

3, rue de Varembé 3 Park Avenue
CH-1211 Geneva 20 US-New York, NY10016-5997
Switzerland USA
Email: inmail@iec.ch Email: stds-info@ieee.org
Web: www.iec.ch Web: www.ieee.org

About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.
 Catalogue of IEC publications: www.iec.ch/searchpub
The IEC on-line Catalogue enables you to search by a variety of criteria (reference number, text, technical committee,…).
It also gives information on projects, withdrawn and replaced publications.
 IEC Just Published: www.iec.ch/online_news/justpub
Stay up to date on all new IEC publications. Just Published details twice a month all new publications released. Available
on-line and also by email.
 Electropedia: www.electropedia.org
The world's leading online dictionary of electronic and electrical terms containing more than 20 000 terms and definitions
in English and French, with equivalent terms in additional languages. Also known as the International Electrotechnical
Vocabulary online.
 Customer Service Centre: www.iec.ch/webstore/custserv
If you wish to give us your feedback on this publication or need further assistance, please visit the Customer Service
Centre FAQ or contact us:
Email: csc@iec.ch
Tel.: +41 22 919 02 11
IEC 60076-21
Edition 1.0 2011-12

IEEE Std C57.15
INTERNATIONAL
STANDARD
Power transformers –
Part 21: Standard requirements, terminology, and test code for step-voltage
regulators
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
XD
ICS 29.180 ISBN 978-2-88912-848-8

– i – IEC 60076-21:2011(E)
IEEE Std C57.15-2009
Contents
1. Overview . 1

1.1 Scope . 1

1.2 Purpose . 1

1.3 Word usage . 1

2. Normative references . 2

3. Definitions . 3

4. Service conditions . 9
4.1 Usual service conditions . 9
4.2 Loading at other than rated conditions .10
4.3 Unusual service conditions .10
4.4 Frequency .12
5. Rating data .12
5.1 Cooling classes of voltage regulators .12
5.2 Ratings .13
5.3 Supplementary continuous-current ratings .17
5.4 Taps .18
5.5 Operating voltage limits .18
5.6 Voltage supply ratios .20
5.7 Insulation levels .20
5.8 Losses .21
5.9 Short-circuit requirements .22
5.10 Tests .23
6. Construction .24
6.1 Bushings .24
6.2 Terminal markings .25
6.3 Diagram of connections .26
6.4 Nameplates .26
6.5 Tank construction .27
6.6 Components and accessories .31
7. Other requirements .32
7.1 Other supplementary continuous-current ratings .32
7.2 Other components and accessories .32
8. Test code.33

8.1 Resistance measurements .34
8.2 Polarity test .36
8.3 Ratio tests .37
8.4 No-load losses and excitation current .40
8.5 Load losses and impedance voltage .45
8.6 Dielectric tests .51
8.7 Temperature-rise tests .64
8.8 Short-circuit tests .73
8.9 Calculated data .77
9. Control systems .81
Published by the IEC under licence from IEEE. © 2009 IEEE. All rights reserved.

IEEE Std C57.15-2009
9.1 General .81

9.2 Control device construction .81

9.3 Control system requirements .82

9.4 Tests .83

Annex A (informative) Unusual temperature and altitude conditions .87

Annex B (informative) Field dielectric tests.89

Annex C (informative) Bibliography.90

Annex D (informative) IEEE List of Participants .92

Published by the IEC under licence from IEEE. © 2009 IEEE. All rights reserved.

– iii – IEC 60076-21:2011(E)
IEEE Std C57.15-2009
INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
POWER TRANSFORMERS –
Part 21: Standard requirements, terminology,

and test code for step-voltage regulators

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
electronic fields. To this end and in addition to other activities, IEC publishes International Standards,
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, governmental and non-governmental organizations liaising with the IEC also participate in
this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in
accordance with conditions determined by agreement between the two organizations.
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
representation from all interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC
National Committees in that sense. While all reasonable efforts are made to ensure that the technical
content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are
used or for any misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly
indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide
conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is not
responsible for any services carried out by independent certification bodies.
6) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject
of patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60076-21/IEEE Std C57.15 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
C57.15-2009 14/688/FDIS 14/697/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.
Published by the IEC under licence from IEEE. © 2009 IEEE. All rights reserved.

IEEE Std C57.15-2009
A list of all the parts in the IEC 60076 series, published under the general title Power
transformers can be found on the IEC website.

The committee has decided that the conten
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.