EN 61378-2:2001
(Main)Convertor transformers - Part 2: Transformers for HVDC applications
Convertor transformers - Part 2: Transformers for HVDC applications
This part of EN 61378 applies to oil-immersed three-phase and -single-phase convertor transformers for use in HVDC power transmission. It applies to transformers having two, three or multiple windings. This standard does not apply to convertor transformers for industrial applications (see EN 61378-1) and to convertor transformers for traction applications (see EN 60310).
Stromrichtertransformatoren - Teil 2: Transformatoren für HGÜ-Anwendungen
Transformateurs de conversion - Partie 2: Transformateurs pour applications CCHT
La présente partie de la EN 61378 s'applique aux transformateurs de conversion immergés dans l'huile triphasés et monophasés utilisés pour la transmission de puissance CCHT. Elle s'applique aux transformateurs possédant deux, trois ou de multiples enroulements. La présente norme ne s'applique pas aux transformateurs de conversion pour applications industrielles (voir EN 61378-1) et aux transformateurs de conversion pour applications de traction (voir EN 60310).
Convertor transformers - Part 2: Transformers for HVDC applications (IEC 61378-2:2001)
General Information
Standards Content (Sample)
SLOVENSKI SIST EN 61378-2:2002
prva izdaja
STANDARD
oktober 2002
Convertor transformers - Part 2: Transformers for HVDC applications (IEC 61378-
2:2001)
ICS 29.180 Referenčna številka
© Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno
EUROPEAN STANDARD EN 61378-2
NORME EUROPÉENNE
EUROPÄISCHE NORM April 2001
ICS 29.180
English version
Convertor transformers
Part 2: Transformers for HVDC applications
(IEC 61378-2:2001)
Transformateurs de conversion Stromrichtertransformatoren
Partie 2: Transformateurs pour Teil 2: Transformatoren für
applications CCHT HGÜ-Anwendungen
(CEI 61378-2:2001) (IEC 61378-2:2001)
This European Standard was approved by CENELEC on 2001-01-01. CENELEC members are bound to
comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and
notified to the Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic,
Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway,
Portugal, Spain, Sweden, Switzerland and United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2001 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61378-2:2001 E
Foreword
The text of document 14/384/FDIS, future edition 1 of IEC 61378-2, prepared by IEC TC 14, Power
transformers, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as
EN 61378-2 on 2001-01-01.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2001-11-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2004-01-01
Annexes designated "normative" are part of the body of the standard.
In this standard, annex ZA is normative.
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61378-2:2001 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
IEC 60310 NOTE: Harmonized as EN 60310:1996 (not modified).
__________
- 3 - EN 61378-2:2001
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions of any
of these publications apply to this European Standard only when incorporated in it by amendment or
revision. For undated references the latest edition of the publication referred to applies (including
amendments).
NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
Publication Year Title EN/HD Year
IEC 60076-1 (mod) 1993 Power transformers EN 60076-1 1997
Part 1: General
IEC 60076-2 (mod) 1993 Part 2: Temperature rise EN 60076-2 1997
IEC 60076-3 2000 Part 3: Insulation levels, dielectric tests EN 60076-3 2001
and external clearances in air
1)
IEC 60076-5 (mod) 1976 Part 5: Ability to withstand short-circuit HD 398.5 S1 1983
IEC 60076-8 1997 Part 8: Application guide - -
2)
IEC 60076-10 Part 10: Determination of sound levels - -
IEC 60137 1995 Insulated bushings for alternating EN 60137 1996
voltages above 1 kV
IEC 60146-1-1 1991 Semiconductor convertors - General EN 60146-1-1 1993
requirements and line commutated
convertors
Part 1-1: Specifications of basic
requirements
IEC 60146-1-2 1991 Semiconductor convertors - General--
requirements and line commutated
convertors
Part 1-2: Application guide
IEC 60214 (mod) 1989 On-load tap-changers EN 60214 1997
IEC 60270 2000 High-voltage test techniques - Partial EN 60270 2001
discharge measurements
IEC 60354 1991 Loading guide for oil-immersed power--
transformers
1)
HD 398.5 S1 is superseded by EN 60076-5:2000 which is based on IEC 60076-5:2000.
2)
To be published.
Publication Year Title EN/HD Year
IEC 60567 1992 Guide for the sampling of gases and of oil EN 60567 1992
from oil-filled electrical equipment and for
the analysis of free and dissolved gases
IEC 61378-1 1997 Convertor transformers EN 61378-1 1998
Part 1: Transformers for industrial + corr. November 1998
applications
NORME
CEI
INTERNATIONALE IEC
61378-2
INTERNATIONAL
Première édition
STANDARD
First edition
2001-02
Transformateurs de conversion –
Partie 2:
Transformateurs pour applications CCHT
Convertor transformers –
Part 2:
Transformers for HVDC applications
© IEC 2001 Droits de reproduction réservés ⎯ Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in
utilisée sous quelque forme que ce soit et par aucun procédé, any form or by any means, electronic or mechanical,
électronique ou mécanique, y compris la photocopie et les including photocopying and microfilm, without permission in
microfilms, sans l'accord écrit de l'éditeur. writing from the publisher.
International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: +41 22 919 0300 e-mail: inmail@iec.ch IEC web site http://www.iec.ch
CODE PRIX
Commission Electrotechnique Internationale
S
PRICE CODE
International Electrotechnical Commission
Pour prix, voir catalogue en vigueur
For price, see current catalogue
61378-2 © IEC:2001 – 3 –
CONTENTS
Page
FOREWORD . 7
Clause
1 General. 11
1.1 Scope . 11
1.2 Service conditions. 11
2 Normative references. 11
3 Definitions. 13
4 List of variables . 15
5 Ratings . 17
5.1 General. 17
5.2 Rated voltage . 17
5.3 Rated current. 17
5.4 Rated frequency . 17
5.5 Rated power . 17
6 Tolerances.17
6.1 General. 17
6.2 Short-circuit impedance tolerances . 17
6.3 Guarantees. 19
7 Losses . 19
7.1 General. 19
7.2 No-load loss . 19
7.3 Load loss under rated power-frequency conditions. 19
7.4 Load loss under service conditions . 21
7.5 Determination of hot-spot temperature. 23
8 Insulation levels . 23
8.1 Line windings. 23
8.2 Valve windings. 23
8.3 Induced voltage level with partial discharge measurements . 25
9 Sound level.25
9.1 General. 25
9.2 Guaranteed sound-power levels. 25
9.3 Sound-power level at site. 27
10 Testing. 27
10.1 General. 27
10.2 Tests . 27
10.3 Load-loss measurements . 29
10.4 Factory dielectric tests. 31
10.5 Temperature-rise test . 37
10.6 Load-current test . 41
10.7 Determination of transformer sound-power level . 41
11 High-frequency modelling. 41
61378-2 © IEC:2001 – 5 –
Clause Page
12 Loading of transformer above rating. 41
13 Bushings. 41
13.1 AC bushings . 41
13.2 Valve winding bushings. 41
14 Tap-changer . 43
14.1 General. 43
14.2 Current wave shape. 43
Bibliography . 45
Figure 1 – Profile of short-circuit impedance tolerances for tapping ranges ≤30 %. 19
Figure 2 – Double reversal test voltage profile. 35
Table 1 – Test conditions for three-winding transformers. 39
61378-2 © IEC:2001 – 7 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CONVERTOR TRANSFORMERS –
Part 2: Transformers for HVDC applications
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes International Standards. 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. The 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 the 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 National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical specifications, technical reports or guides and they are accepted by the National
Committees in that sense.
4) In order to promote internati
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