Voltage sourced converter (VSC) valves for high-voltage direct current (HVDC) power transmission - Electrical testing

IEC 62501:2009 applies to self-commutated converter valves, for use in a three-phase bridge voltage sourced converter (VSC) for high voltage d.c. power transmission or as part of a back-to-back link. It is restricted to electrical type and production tests.

Valves à convertisseur de source de tension (VSC) pour le transport d'énergie en courant continu à haute tension (CCHT) - Essais électriques

La CEI 62501:2009 s'applique aux valves à convertisseur autocommuté, conçues pour être utilisées dans un convertisseur de source de tension (VSC, valve sourced converter en anglais) en pont triphasé pour le transport d'énergie en courant continu à haute tension ou en tant qu'élément d'une liaison dos-à-dos. Elle se limite aux essais de type électrique et de production.

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IEC 62501 ®
Edition 1.0 2009-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Voltage sourced converter (VSC) valves for high-voltage direct current (HVDC)
power transmission – Electrical testing

Valves à convertisseur de source de tension (VSC) pour le transport d’énergie
en courant continu à haute tension (CCHT) – Essais électriques

All rights reserved. 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 either IEC or
IEC's member National Committee in the country of the requester.
If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,
please contact the address below or your local IEC member National Committee for further information.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite
ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie
et les microfilms, sans l'accord écrit de la CEI ou du Comité national de la CEI du pays du demandeur.
Si vous avez des questions sur le copyright de la CEI ou si vous désirez obtenir des droits supplémentaires sur cette
publication, utilisez les coordonnées ci-après ou contactez le Comité national de la CEI de votre pays de résidence.

IEC Central Office
3, rue de Varembé
CH-1211 Geneva 20
Switzerland
Email: 0Hinmail@iec.ch
Web: 1Hwww.iec.ch
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.
ƒ Catalogue of IEC publications: 2Hwww.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.
ƒ IEC Just Published: 3Hwww.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.
ƒ Electropedia: 4Hwww.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.
ƒ Customer Service Centre: 5Hwww.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: 6Hcsc@iec.ch
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A propos de la CEI
La Commission Electrotechnique Internationale (CEI) est la première organisation mondiale qui élabore et publie des
normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications CEI
Le contenu technique des publications de la CEI est constamment revu. Veuillez vous assurer que vous possédez
l’édition la plus récente, un corrigendum ou amendement peut avoir été publié.
ƒ Catalogue des publications de la CEI: 7Hwww.iec.ch/searchpub/cur_fut-f.htm
Le Catalogue en-ligne de la CEI vous permet d’effectuer des recherches en utilisant différents critères (numéro de référence,
texte, comité d’études,…). Il donne aussi des informations sur les projets et les publications retirées ou remplacées.
ƒ Just Published CEI: 8Hwww.iec.ch/online_news/justpub
Restez informé sur les nouvelles publications de la CEI. Just Published détaille deux fois par mois les nouvelles
publications parues. Disponible en-ligne et aussi par email.
ƒ Electropedia: 9Hwww.electropedia.org
Le premier dictionnaire en ligne au monde de termes électroniques et électriques. Il contient plus de 20 000 termes et
définitions en anglais et en français, ainsi que les termes équivalents dans les langues additionnelles. Egalement appelé
Vocabulaire Electrotechnique International en ligne.
ƒ Service Clients: 10Hwww.iec.ch/webstore/custserv/custserv_entry-f.htm
Si vous désirez nous donner des commentaires sur cette publication ou si vous avez des questions, visitez le FAQ du
Service clients ou contactez-nous:
Email: 11Hcsc@iec.ch
Tél.: +41 22 919 02 11
Fax: +41 22 919 03 00
IEC 62501 ®
Edition 1.0 2009-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Voltage sourced converter (VSC) valves for high-voltage direct current (HVDC)
power transmission – Electrical testing

Valves à convertisseur de source de tension (VSC) pour le transport d’énergie
en courant continu à haute tension (CCHT) – Essais électriques

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
X
CODE PRIX
ICS 29.200; 29.240 ISBN 978-2-88910-744-5
– 2 – 62501 © IEC:2009
CONTENTS
FOREWORD.0H0H0H5
1 Scope.1H1H1H7
2 Normative references .2H2H2H7
3 Terms and definitions .3H3H3H7
3.1 Insulation co-ordination terms .4H4H4H7
3.2 Power semiconductor terms .5H5H5H8
3.3 Operating states.6H6H6H8
3.3.1 Operating state of an IGBT-diode pair .7H7H7H8
3.3.2 Operating state of converter .8H8H8H9
3.4 VSC construction terms.9H9H9H9
3.5 Valve structure terms .10H10H10H10
4 General requirements .11H11H11H10
4.1 Guidelines for the performance of type tests.12H12H12H10
4.1.1 Evidence in lieu .13H13H13H10
4.1.2 Test object .14H14H14H10
4.1.3 Sequence of test .15H15H15H11
4.1.4 Test procedure .16H16H16H11
4.1.5 Ambient temperature for testing.17H17H17H11
4.1.6 Frequency for testing.18H18H18H11
4.1.7 Test reports .19H19H19H11
4.2 Atmospheric correction factor .20H20H20H11
4.3 Treatment of redundancy.21H21H21H12
4.3.1 Operational tests .22H22H22H12
4.3.2 Dielectric tests.23H23H23H12
4.4 Criteria for successful type testing.24H24H24H12
4.4.1 General .25H25H25H12
4.4.2 Criteria applicable to valve levels .26H26H26H13
4.4.3 Criteria applicable to the valve as a whole.27H27H27H14
5 List of type tests .28H28H28H14
6 Operational tests .29H29H29H14
6.1 Purpose of tests .30H30H30H14
6.2 Test object .31H31H31H15
6.3 Test circuit .32H32H32H15
6.4 Maximum continuous operating duty test .33H33H33H15
6.5 Maximum temporary over-load operating duty test.34H34H34H16
6.6 Minimum d.c. voltage test.35H35H35H16
7 Dielectric tests on valve support structure .36H36H36H17
7.1 Purpose of tests .37H37H37H17
7.2 Test object .38H38H38H17
7.3 Test requirements .39H39H39H17
7.3.1 Valve support d.c. voltage test.40H40H40H17
7.3.2 Valve support a.c. voltage test.41H41H41H18
7.3.3 Valve support switching impulse test .42H42H42H19
7.3.4 Valve support lightning impulse test .43H43H43H19
8 Dielectric tests on multiple valve unit.44H44H44H19
8.1 Purpose of tests .45H45H45H19

62501 © IEC:2009 – 3 –
8.2 Test object .46H46H46H19
8.3 Test requirements .47H47H47H20
8.3.1 MVU d.c. voltage test to earth .48H48H48H20
8.3.2 MVU a.c. voltage test .49H49H49H20
8.3.3 MVU switching impulse test .50H50H50H21
8.3.4 MVU lightning impulse test .51H51H51H22
9 Dielectric tests between valve terminals .52H52H52H22
9.1 Purpose of the test .53H53H53H22
9.2 Test object .54H54H54H23
9.3 Test requirements .55H55H55H23
9.3.1 Valve a.c. – d.c. voltage test.56H56H56H23
9.3.2 Valve impulse tests (general) .57H57H57H25
9.3.3 Valve switching impulse test.58H58H58H25
9.3.4 Valve lightning impulse test .59H59H59H26
10 IGBT overcurrent turn-off test .60H60H60H26
10.1 Purpose of test.61H61H61H26
10.2 Test object .62H62H62H27
10.3 Test requirements .63H63H63H27
11 Short-circuit current test .64H64H64H27
11.1 Purpose of tests .65H65H65H27
11.2 Test object .66H66H66H27
11.3 Test requirements .67H67H67H27
12 Tests for valve insensitivity to electromagnetic disturbance .68H68H68H28
12.1 Purpose of tests .69H69H69H28
12.2 Test object .70H70H70H28
12.3 Test requirements .71H71H71H28
12.3.1 General .
...


IEC 62501 ®
Edition 1.1 2014-08
CONSOLIDATED
VERSION
VERSION
CONSOLIDÉE
colour
inside
Voltage sourced converter (VSC) valves for high-voltage direct current (HVDC)
power transmission – Electrical testing

Valves à convertisseur de source de tension (VSC) pour le transport d’énergie
en courant continu à haute tension (CCHT) – Essais électriques

All rights reserved. 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
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or

your local IEC member National Committee for further information.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite
ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie

et les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des

questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé Fax: +41 22 919 03 00
CH-1211 Geneva 20 info@iec.ch
Switzerland www.iec.ch
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.

IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing more than 30 000 terms and
Technical Specifications, Technical Reports and other definitions in English and French, with equivalent terms in 14
documents. Available for PC, Mac OS, Android Tablets and additional languages. Also known as the International
iPad. Electrotechnical Vocabulary (IEV) online.

IEC publications search - www.iec.ch/searchpub IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a More than 55 000 electrotechnical terminology entries in
variety of criteria (reference number, text, technical English and French extracted from the Terms and Definitions
committee,…). It also gives information on projects, replaced clause of IEC publications issued since 2002. Some entries
and withdrawn publications. have been collected from earlier publications of IEC TC 37,

77, 86 and CISPR.
IEC Just Published - webstore.iec.ch/justpublished
Stay up to date on all new IEC publications. Just Published IEC Customer Service Centre - webstore.iec.ch/csc
details all new publications released. Available online and If you wish to give us your feedback on this publication or
also once a month by email. need further assistance, please contact the Customer Service
Centre: csc@iec.ch.
A propos de l'IEC
La Commission Electrotechnique Internationale (IEC) est la première organisation mondiale qui élabore et publie des
Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications IEC
Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez l’édition la
plus récente, un corrigendum ou amendement peut avoir été publié.

Catalogue IEC - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
Application autonome pour consulter tous les renseignements
Le premier dictionnaire en ligne de termes électroniques et
bibliographiques sur les Normes internationales,
électriques. Il contient plus de 30 000 termes et définitions en
Spécifications techniques, Rapports techniques et autres
anglais et en français, ainsi que les termes équivalents dans
documents de l'IEC. Disponible pour PC, Mac OS, tablettes
14 langues additionnelles. Egalement appelé Vocabulaire
Android et iPad.
Electrotechnique International (IEV) en ligne.

Recherche de publications IEC - www.iec.ch/searchpub
Glossaire IEC - std.iec.ch/glossary
Plus de 55 000 entrées terminologiques électrotechniques, en
La recherche avancée permet de trouver des publications IEC
en utilisant différents critères (numéro de référence, texte, anglais et en français, extraites des articles Termes et
comité d’études,…). Elle donne aussi des informations sur les Définitions des publications IEC parues depuis 2002. Plus
projets et les publications remplacées ou retirées. certaines entrées antérieures extraites des publications des

CE 37, 77, 86 et CISPR de l'IEC.
IEC Just Published - webstore.iec.ch/justpublished

Service Clients - webstore.iec.ch/csc
Restez informé sur les nouvelles publications IEC. Just
Published détaille les nouvelles publications parues. Si vous désirez nous donner des commentaires sur cette
Disponible en ligne et aussi une fois par mois par email. publication ou si vous avez des questions contactez-nous:
csc@iec.ch.
IEC 62501 ®
Edition 1.1 2014-08
CONSOLIDATED
VERSION
VERSION
CONSOLIDÉE
colour
inside
Voltage sourced converter (VSC) valves for high-voltage direct current (HVDC)

power transmission – Electrical testing

Valves à convertisseur de source de tension (VSC) pour le transport d’énergie

en courant continu à haute tension (CCHT) – Essais électriques

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.200; 29.240 ISBN 978-2-8322-1816-7

IEC 62501 ®
Edition 1.1 2014-08
REDLINE VERSION
VERSION REDLINE
colour
inside
Voltage sourced converter (VSC) valves for high-voltage direct current (HVDC)
power transmission – Electrical testing

Valves à convertisseur de source de tension (VSC) pour le transport d’énergie
en courant continu à haute tension (CCHT) – Essais électriques

– 2 – IEC 62501:2009
+AMD1:2014 CSV  IEC 2014
CONTENTS
FOREWORD. 0H0H5

1 Scope . 1H1H7

2 Normative references . 2H2H7

3 Terms and definitions . 3H3H7

3.1 Insulation co-ordination terms . 4H4H8

3.2 Power semiconductor terms . 5H5H8

3.3 Operating states of converter . 6H6H9

3.3.1 Operating state of an IGBT-diode pair . 7H7H
3.3.2 Operating state of converter . 8H8H
3.4 VSC construction terms . 9H9H9
3.5 Valve structure terms . 10H10H11
4 General requirements . 11H11H11
4.1 Guidelines for the performance of type tests . 12H12H11
4.1.1 Evidence in lieu . 13H13H11
4.1.2 Test object . 14H14H12
4.1.3 Sequence of test . 15H15H
4.1.4 Test procedure . 16H16H12
4.1.5 Ambient temperature for testing. 17H17H12
4.1.6 Frequency for testing . 18H18H12
4.1.7 Test reports . 19H19H12
4.1.8 Conditions to be considered in determination of type test parameters . 13
4.2 Atmospheric correction factor. 20H20H13
4.3 Treatment of redundancy . 21H21H13
4.3.1 Operational tests . 22H22H13
4.3.2 Dielectric tests . 23H23H13
4.4 Criteria for successful type testing . 24H24H14
4.4.1 General . 25H25H14
4.4.2 Criteria applicable to valve levels . 26H26H14
4.4.3 Criteria applicable to the valve as a whole . 27H27H15
5 List of type tests . 28H28H15
6 Operational tests . 29H29H16
6.1 Purpose of tests . 30H30H16

6.2 Test object . 31H31H16
6.3 Test circuit . 32H32H16
6.4 Maximum continuous operating duty test . 33H33H17
6.5 Maximum temporary over-load operating duty test . 34H34H17
6.6 Minimum d.c. voltage test . 35H35H18
7 Dielectric tests on valve support structure . 36H36H18
7.1 Purpose of tests . 37H37H18
7.2 Test object . 38H38H18
7.3 Test requirements . 39H39H19
7.3.1 Valve support d.c. voltage test . 40H40H19
7.3.2 Valve support a.c. voltage test . 41H41H20
7.3.3 Valve support switching impulse test . 42H42H20
7.3.4 Valve support lightning impulse test . 43H43H21
8 Dielectric tests on multiple valve unit . 44H44H21

+AMD1:2014 CSV  IEC 2014
8.1 Purpose of tests . 45H45H21

8.2 Test object . 46H46H21

8.3 Test requirements . 47H47H21

8.3.1 MVU d.c. voltage test to earth . 48H48H21

8.3.2 MVU a.c. voltage test . 49H49H22

8.3.3 MVU switching impulse test . 50H50H23

8.3.4 MVU lightning impulse test . 51H51H24

9 Dielectric tests between valve terminals . 52H52H24

9.1 Purpose of the test . 53H53H24

9.2 Test object . 54H54H25
9.3 Test requirements . 55H55H25
9.3.1 Valve a.c. – d.c. voltage test . 56H56H25
9.3.2 Valve impulse tests (general) . 57H57H27
9.3.3 Valve switching impu
...


IEC 62501 ®
Edition 1.2 2017-09
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Voltage sourced converter (VSC) valves for high-voltage direct current (HVDC)
power transmission – Electrical testing

Valves à convertisseur de source de tension (VSC) pour le transport d’énergie
en courant continu à haute tension (CCHT) – Essais électriques

All rights reserved. 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

either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or

your local IEC member National Committee for further information.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite
ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie

et les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des

questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé Fax: +41 22 919 03 00
CH-1211 Geneva 20 info@iec.ch
Switzerland www.iec.ch
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.

IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing 20 000 terms and definitions in
Technical Specifications, Technical Reports and other English and French, with equivalent terms in 16 additional
documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
iPad. Vocabulary (IEV) online.

IEC publications search - www.iec.ch/searchpub IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a 65 000 electrotechnical terminology entries in English and
variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of
committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been
and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and

CISPR.
IEC Just Published - webstore.iec.ch/justpublished

Stay up to date on all new IEC publications. Just Published IEC Customer Service Centre - webstore.iec.ch/csc
details all new publications released. Available online and If you wish to give us your feedback on this publication or
also once a month by email. need further assistance, please contact the Customer Service
Centre: csc@iec.ch.
A propos de l'IEC
La Commission Electrotechnique Internationale (IEC) est la première organisation mondiale qui élabore et publie des
Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications IEC
Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez l’édition la
plus récente, un corrigendum ou amendement peut avoir été publié.

Catalogue IEC - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
Application autonome pour consulter tous les renseignements
Le premier dictionnaire en ligne de termes électroniques et
bibliographiques sur les Normes internationales,
électriques. Il contient 20 000 termes et définitions en anglais
Spécifications techniques, Rapports techniques et autres
et en français, ainsi que les termes équivalents dans 16
documents de l'IEC. Disponible pour PC, Mac OS, tablettes
langues additionnelles. Egalement appelé Vocabulaire
Android et iPad.
Electrotechnique International (IEV) en ligne.

Recherche de publications IEC - www.iec.ch/searchpub
Glossaire IEC - std.iec.ch/glossary
La recherche avancée permet de trouver des publications IEC
65 000 entrées terminologiques électrotechniques, en anglais
en utilisant différents critères (numéro de référence, texte,
et en français, extraites des articles Termes et Définitions des
comité d’études,…). Elle donne aussi des informations sur les
publications IEC parues depuis 2002. Plus certaines entrées
projets et les publications remplacées ou retirées.
antérieures extraites des publications des CE 37, 77, 86 et

CISPR de l'IEC.
IEC Just Published - webstore.iec.ch/justpublished

Restez informé sur les nouvelles publications IEC. Just Service Clients - webstore.iec.ch/csc
Published détaille les nouvelles publications parues. Si vous désirez nous donner des commentaires sur cette
Disponible en ligne et aussi une fois par mois par email. publication ou si vous avez des questions contactez-nous:
csc@iec.ch.
IEC 62501 ®
Edition 1.2 2017-09
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Voltage sourced converter (VSC) valves for high-voltage direct current (HVDC)

power transmission – Electrical testing

Valves à convertisseur de source de tension (VSC) pour le transport d’énergie

en courant continu à haute tension (CCHT) – Essais électriques

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.200; 29.240.99 ISBN 978-2-8322-4857-7

IEC 62501 ®
Edition 1.2 2017-09
CONSOLIDATED VERSION
REDLINE VERSION
VERSION REDLINE
colour
inside
Voltage sourced converter (VSC) valves for high-voltage direct current (HVDC)
power transmission – Electrical testing

Valves à convertisseur de source de tension (VSC) pour le transport d’énergie
en courant continu à haute tension (CCHT) – Essais électriques

– 2 – IEC 62501:2009+AMD1:2014

+AMD2:2017 CSV  IEC 2017
CONTENTS
FOREWORD . 5

1 Scope . 7

2 Normative references . 7

3 Terms and definitions . 8

3.1 Insulation co-ordination terms . 8

3.2 Power semiconductor terms . 8

3.3 Operating states of converter . 9

3.3.1 Operating state of an IGBT-diode pair .
3.3.2 Operating state of converter .
3.4 VSC construction terms . 9
3.5 Valve structure terms . 11
4 General requirements . 11
4.1 Guidelines for the performance of type tests. 11
4.1.1 Evidence in lieu . 11
4.1.2 Selection of test object . 12
4.1.3 Sequence of test .
4.1.43 Test procedure . 12
4.1.54 Ambient temperature for testing . 12
4.1.65 Frequency for testing . 12
4.1.76 Test reports . 13
4.1.7 Conditions to be considered in determination of type test parameters . 13
4.2 Atmospheric correction factor . 13
4.3 Treatment of redundancy . 13
4.3.1 Operational tests . 13
4.3.2 Dielectric tests . 14
4.4 Criteria for successful type testing . 14
4.4.1 General . 14
4.4.2 Criteria applicable to valve levels . 14
4.4.3 Criteria applicable to the valve as a whole . 15
5 List of type tests . 15
6 Operational tests . 16
6.1 Purpose of tests . 16

6.2 Test object . 16
6.3 Test circuit . 17
6.4 Maximum continuous operating duty test . 17
6.5 Maximum temporary over-load operating duty test . 18
6.6 Minimum d.c. voltage test . 18
7 Dielectric tests on valve support structure . 19
7.1 Purpose of tests . 19
7.2 Test object . 19
7.3 Test requirements . 19
7.3.1 Valve support d.c. voltage test . 19
7.3.2 Valve support a.c. voltage test . 20
7.3.3 Valve support switching impulse test . 21
7.3.4 Valve support lightning impulse test . 21
8 Dielectric tests on multiple valve unit . 21

+AMD2:2017 CSV  IEC 2017
8.1 Purpose of tests . 22

8.2 Test object . 22

8.3 Test requirements . 22

8.3.1 MVU d.c. voltage test to earth . 22

8.3.2 MVU a.c. voltage test . 23

8.3.3 MVU switching impulse test . 24

8.3.4 MVU lightning impulse test . 25

9 Dielectric tests between valve terminals . 25

9.1 Purpose of the test . 25

9.2 Test object . 26
9.3 Test requirements . 26
9.3.1 Valve a.c. – d.c. voltage test . 26
9.3.2 Valve impulse tests (general) . 28
9.3.3 Valve switching impulse test . 28
9.3.4 Valve lightning impulse test .
...

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