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SLOVENSKI STANDARD
01-januar-2019
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SIST EN 60076-11:2005
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Power transformers - Part 11: Dry-type transformers
Leistungstransformatoren - Teil 11: Trockentransformatoren
Transformateurs de puissance - Partie 11: Transformateurs de type sec
Ta slovenski standard je istoveten z: EN IEC 60076-11:2018
ICS:
29.180 Transformatorji. Dušilke Transformers. Reactors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN IEC 60076-11
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2018
ICS 29.180 Supersedes EN 60076-11:2004
English Version
Power transformers - Part 11: Dry-type transformers
(IEC 60076-11:2018)
Transformateurs de puissance - Partie 11: Transformateurs Leistungstransformatoren - Teil 11: Trockentransformatoren
de type sec (IEC 60076-11:2018)
(IEC 60076-11:2018)
This European Standard was approved by CENELEC on 2018-09-19. 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,
Switzerland, Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60076-11:2018 E
European foreword
The text of document 14/964/FDIS, future edition 2 of IEC 60076-11, 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:
• latest date by which the document has to be implemented at national (dop) 2019-06-19
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2021-09-19
document have to be withdrawn
This document supersedes EN 60076-11:2004.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Endorsement notice
The text of the International Standard IEC 60076-11:2018 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 60721-2-6:1990 NOTE Harmonized as HD 478.2.6 S1:1993 (not modified)
ISO 12944-2 NOTE Harmonized as EN ISO 12944-2
ISO 12944 (series) NOTE Harmonized as EN ISO 12944 (series)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 1 Where an International Publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60068-3-3 - Environmental testing - Part 3-3: Guidance - EN 60068-3-3 -
Seismic test methods for equipments
IEC 60071-1 - Insulation co-ordination - Part 1: Definitions, EN 60071-1 -
principles and rules
IEC 60071-2 - Insulation co-ordination – Part 2: Application EN IEC 60071-2 -
guidelines
IEC 60076-1 2011 Power transformers - Part 1: General EN 60076-1 2011
IEC 60076-2 - Power transformers - Part 2: Temperature rise EN 60076-2 -
for liquid-immersed transformers
IEC 60076-3 2013 Power transformers - Part 3: Insulation levels, EN 60076-3 2013
dielectric tests and external clearances in air
IEC 60076-5 - Power transformers - Part 5: Ability to withstand EN 60076-5 -
short circuit
IEC 60076-10 - Power transformers - Part 10: Determination of EN 60076-10 -
sound levels
IEC 60076-12 2008 Power transformers - Part 12: Loading guide for - -
dry-type power transformers
IEC 60085 - Electrical insulation - Thermal evaluation and EN 60085 -
designation
IEC 60270 - High-voltage test techniques - Partial discharge EN 60270 -
measurements
IEC 60332-3-10 - Tests on electric cables under fire conditions - EN IEC 60332-3- -
Part 3-10: Test for vertical flame spread of 10
vertically-mounted bunched wires or cables -
Apparatus
IEC 60529 - Degrees of protection provided by enclosures - -
(IP Code)
IEC 60721-3-4 - Classification of environmental conditions - Part EN 60721-3-4 -
3: Classification of groups of environmental
parameters and their severities - Section 4:
Stationary use at non-weatherprotected
locations
IEC/TS 60815-1 - Selection and dimensioning of high-voltage EN 61378-1 -
insulators intended for use in polluted
conditions - Part 1: Definitions, information and
general principles
IEC 61378-1 - Converter transformers - Part 1: Transformers EN 61378-1 -
for industrial applications
IEC 62271-202 - High-voltage switchgear and controlgear - Part EN 62271-202 -
202: High-voltage/ low-voltage prefabricated
substation
ISO 12944-6 - Paints and varnishes - Corrosion protection of EN ISO 12944-6 -
steel structures by protective paint systems -
Part 6: Laboratory performance test methods
IEC 60076-11
Edition 2.0 2018-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Power transformers –
Part 11: Dry-type transformers
Transformateurs de puissance –
Partie 11: Transformateurs de type sec
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.180 ISBN 978-2-8322-5910-8
– 2 – IEC 60076-11:2018 © IEC 2018
CONTENTS
FOREWORD . 6
1 Scope . 8
2 Normative references. 8
3 Terms and definitions . 9
4 Service conditions . 10
4.1 General . 10
4.2 Normal service conditions . 10
4.3 Electromagnetic compatibility (EMC) . 11
5 Rating and general requirements . 12
5.1 General . 12
5.2 Rated power . 12
5.2.1 General . 12
5.2.2 Definition of the rated power with fans cooling or heat exchangers . 12
5.2.3 Transformer IP00 (without enclosure) . 12
5.2.4 Transformer with enclosure . 12
5.2.5 Preferred values of rated power . 13
5.2.6 Loading beyond rated power . 13
5.3 Provision for unusual service conditions . 13
5.4 Transportation and storage . 14
5.4.1 Transport limitation . 14
5.4.2 Transport acceleration . 14
5.4.3 Temperature and environment conditions for transport and storage . 14
5.5 Rated voltage and rated frequency . 15
5.5.1 Rated voltage . 15
5.5.2 Rated frequency . 15
5.6 Operation at higher than rated voltage . 15
5.7 Highest voltage for equipment U and dielectric tests levels . 15
m
5.8 Identification according to cooling method . 15
5.8.1 General . 15
5.8.2 Identification symbols . 15
5.8.3 Arrangement of symbols . 16
5.9 Guaranteed temperature rise at rated conditions . 16
5.10 Additional information required for enquiry . 16
5.11 Sound level . 16
5.12 Components and materials . 16
6 Tappings . 16
7 Connections . 17
8 Ability to withstand short circuit . 17
9 Rating plate . 17
9.1 Rating plate fitted to the transformer . 17
9.2 Rating plate fitted to the transformer enclosure . 18
10 Temperature-rise limits . 18
10.1 Normal temperature-rise limits . 18
10.2 Reduced temperature rises for transformers designed for high cooling
medium temperatures or special cooling medium conditions . 19
IEC 60076-11:2018 © IEC 2018 – 3 –
10.3 High altitude temperature rise correction . 19
11 Insulation levels . 19
11.1 General . 19
11.2 Transformers for use at high altitudes . 20
12 Climatic, environmental and fire behaviour classes . 21
12.1 Climatic classes . 21
12.2 Environmental classes . 21
12.2.1 Transformers for indoor application with or without enclosure and for
outdoor application with enclosure . 21
12.2.2 Dry-type transformers without enclosure for outdoor application . 22
12.3 Fire behaviour classes . 22
12.4 Te
...