EN 60076-16:2011

SLOVENSKI STANDARD
01-januar-2012
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Power transformers - Part 16: Transformers for wind turbines application
Leistungstransformatoren - Teil 16: Transformatoren für Windenergieanlagen-
Anwendungen
Transformateurs de puissance - Partie 16: Transformateurs pour applications éoliennes
Ta slovenski standard je istoveten z: EN 60076-16:2011
ICS:
29.180 Transformatorji. Dušilke Transformers. Reactors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 60076-16
NORME EUROPÉENNE
October 2011
EUROPÄISCHE NORM
ICS 29.180
English version
Power transformers -
Part 16: Transformers for wind turbines applications
(IEC 60076-16:2011)
Transformateurs de puissance -  Leistungstransformatoren -
Partie 16: Transformateurs pour Teil 16: Transformatoren für
applications éoliennes Windenergieanlagen-Anwendungen
(CEI 60076-16:2011) (IEC 60076-16:2011)

This European Standard was approved by CENELEC on 2011-09-29. 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 CEN-CENELEC Management Centre 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 CEN-CENELEC Management Centre has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,
the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia,
Spain, Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60076-16:2011 E
Foreword
The text of document 14/690/FDIS, future edition 1 of IEC 60076-16, prepared by IEC/TC 14 "Power
transformers", was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
(dop) 2012-06-29
• latest date by which the document has
to be implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2014-09-29
• latest date by which the national
standards conflicting with the
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent
rights.
Endorsement notice
The text of the International Standard IEC 60076-16:2011 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 60071-1:2006 NOTE  Harmonized as EN 60071-1:2006 (not modified).
IEC 60071-2:1996 NOTE  Harmonized as EN 60071-2:1997 (not modified).
IEC 60137:2008 NOTE  Harmonized as EN 60137:2008 (not modified).
IEC 60270:2000 NOTE  Harmonized as EN 60270:2001 (not modified).
IEC 62271-100:2008 NOTE  Harmonized as EN 62271-100:2009 (not modified).
IEC 62271-202:2006 NOTE  Harmonized as EN 62271-202:2007 (not modified).

- 3 - EN 60076-16:2011
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.

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 2011 Power transformers - EN 60076-1 2011
Part 1: General
IEC 60076-2 2011 Power transformers - EN 60076-2 2011
Part 2: Temperature rise for liquid-immersed
transformers
IEC 60076-3 2000 Power transformers - EN 60076-3 2001
+ corr. December 2000 Part 3: Insulation levels, dielectric tests and
external clearances in air
IEC 60076-5 2006 Power transformers - EN 60076-5 2006
Part 5: Ability to withstand short circuit

IEC 60076-7 2005 Power transformers - - -
Part 7: Loading guide for oil-immersed power
transformers
IEC 60076-8 1997 Power transformers - - -
Part 8: Application guide
IEC 60076-11 2004 Power transformers - EN 60076-11 2004
Part 11: Dry-type transformers

IEC 60076-12 2008 Power transformers - - -
Part 12: Loading guide for dry-type power
transformers
IEC 60076-13 2006 Power transformers - EN 60076-13 2006
Part 13: Self-protected liquid-filled
transformers
IEC 61100 - Classification of insulating liquids according EN 61100 -
to fire point and net calorific value

IEC 61378-1 2011 Convertor transformers - EN 61378-1 2011
Part 1: Transformers for industrial applications

IEC 61378-3 2006 Convertor transformers - - -
Part 3: Application guide
IEC 61400-1 2005 Wind turbines - EN 61400-1 2005
Part 1: Design requirements
ISO 12944 Series Paints and varnishes - Corrosion protection of - -
steel structures by protective paint systems

IEC 60076-16 ®
Edition 1.0 2011-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Power transformers –
Part 16: Transformers for wind turbine applications

Transformateurs de puissance –
Partie 16: Transformateurs pour applications éoliennes

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX W
ICS 29.180 ISBN 978-2-88912-670-5

– 2 – 60076-16 © IEC:2011
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Service conditions . 8
4.1 Normal service conditions . 8
4.2 Altitude . 8
4.3 Temperature of cooling air . 8
4.4 Content of harmonic currents in the transformer . 9
4.5 Wave-shape of supply voltage . 9
4.6 Transient over and under voltages . 9
4.7 Humidity and salinity . 10
4.8 Special electrical and environmental conditions around the transformer . 10
4.9 Level of vibration . 11
4.10 Provision for unusual service conditions for transformers for wind turbine
applications . 11
4.11 Transportation and storage conditions . 11
4.12 Corrosion protection . 11
5 Electrical characteristics . 11
5.1 Rated power . 11
5.2 Highest voltage for equipment . 11
5.3 Tappings . 12
5.4 Connection group . 12
5.5 Dimensioning of neutral terminal . 12
5.6 Short circuit impedance . 12
5.7 Insulation levels for high voltage and low voltage windings . 12
5.8 Temperature rise guaranteed at rated conditions . 12
5.9 Overload capability . 13
5.10 Inrush current . 13
5.11 Ability to withstand short circuit . 13
5.12 Operation with forced cooling . 13
6 Rating plate . 13
7 Tests . 13
7.1 List and classification of tests (routine, type and special tests) . 13
7.2 Routine tests . 13
7.3 Type tests . 14
7.4 Special tests . 14
7.4.1 General . 14
7.4.2 Chopped wave test . 14
7.4.3 Electrical resonance frequency test . 14
7.4.4 Climatic tests . 14
7.4.5 Environmental test E3 . 14
7.4.6 Fire behavior test . 15
Annex A (informative) Calculation method and tables . 16
Bibliography . 36

60076-16 © IEC:2011 – 3 –
Figure A.1 – Heat dissipation in a natural ventilated room . 17
Figure A.2 – Schematic diagram of power frequency current injection apparatus . 30
Figure A.3 – Switched transformer winding voltage responses with capacitor injection . 31
Figure A.4 – HV Injection test figure . 32
Figure A.5 – Example of measurement device . 33

Table 1 – Insulation levels . 10
Table A.1 – Impact of harmonics content on liquid-immersed transformer losses . 23
Table A.2 – Impact of harmonics content on dry type transformers losses. 26
Table A.3 – Example of voltage harmonic order . 29

– 4 – 60076-16 © IEC:2011
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
POWER TRANSFORMERS –
Part 16: Transformers for wind turbine applications

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 subjec
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