EN 60076-11:2004

Power transformers - Part 11: Dry-type transformers

Applies to dry-type power transformers (including auto-transformers) having values of highest voltage for equipment up to and including 36 kV and at least one winding operating at greater than 1,1 kV. Applies to all construction technologies.

Leistungstransformatoren - Teil 11: Trockentransformatoren

Transformateurs de puissance - Partie 11: Transformateurs de type sec

S'applique aux transformateurs de type sec (y compris les autotransformateurs) ayant des valeurs de tension la plus élevée pour le matériel inférieures ou égales à 36 kV avec au moins un enroulement fonctionnant à plus de 1,1 kV. S'applique à toutes les technologies de construction.

Močnostni transformatorji – 11. del: Suhi transformatorji (IEC 60076-11:2004)

General Information

• Status: Withdrawn
• Publication Date: 27-Jul-2004
• Withdrawal Date: 30-Jun-2007
• ICS: 29.180 - Transformers. Reactors
• Technical Committee: CLC/TC 14 - Power transformers
• Drafting Committee: IEC/TC 14 - IEC_TC_14
• Parallel Committee: IEC/TC 14 - IEC_TC_14
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 19-Sep-2021
• Completion Date: 19-Sep-2021
• Ref Project: SIST EN 60076-11:2005 - Power transformers -- Part 11: Dry-type transformers

Relations

• Replaces: EN 60726:2003 - Dry-type power transformers
• Effective Date: 29-Jan-2023
• Replaced By: EN IEC 60076-11:2018 - Power transformers - Part 11: Dry-type transformers
• Effective Date: 30-Oct-2018

Standards Content (Sample)

SLOVENSKI SIST EN 60076-11:2005

STANDARD
februar 2005
Močnostni transformatorji – 11. del: Suhi transformatorji (IEC 60076-11:2004)
Power transformers - Part 11: Dry-type transformers (IEC 60076-11:2004)
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 60076-11
NORME EUROPÉENNE
EUROPÄISCHE NORM July 2004
ICS 29.180 Supersedes EN 60726:2003

English version
Power transformers
Part 11: Dry-type transformers
(IEC 60076-11:2004)
Transformateurs de puissance Leistungstransformatoren
Partie 11: Transformateurs de type sec Teil 11: Trockentransformatoren
(CEI 60076-11:2004) (IEC 60076-11:2004)

This European Standard was approved by CENELEC on 2004-07-01. 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, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, 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

© 2004 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 60076-11:2004 E
Foreword
The text of document 14/476/FDIS, future edition 1 of IEC 60076-11, prepared by IEC TC 14, Power
transformers, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as
EN 60076-11 on 2004-07-01.
This European Standard supersedes EN 60726:2003.
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) 2005-04-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2007-07-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60076-11:2004 was approved by CENELEC as a European
Standard without any modification.
__________
- 3 - EN 60076-11:2004
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 Where an international publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
Publication Year Title EN/HD Year
IEC 60050 Series International Electrotechnical Vocabulary- -

IEC 60071 Series Insulation co-ordination EN 60071 Series

IEC 60076-1 1993 Power transformers EN 60076-1 1997
(mod) Part 1: General A11 1997
A1 1999 A1 2000
A12 2002
1) 2)
IEC 60076-2 - Part 2: Temperature rise EN 60076-2 1997
(mod)
1) 2)
IEC 60076-3 - Part 3: Insulation levels, dielectric tests EN 60076-3 2001
and external clearances in air

1) 2)
IEC 60076-5 - Part 5: Ability to withstand short circuit EN 60076-5 2000

1) 2)
IEC 60076-10 - Part 10: Determination of sound levels EN 60076-10 2001

1)
IEC 60085 - Electrical insulation - Thermal - -
classification
1) 2)
IEC 60270 - High-voltage test techniques - Partial EN 60270 2001
discharge measurements
1)
IEC 60332-3-10 - Test on electric cables under fire - -
conditions
Part 3-10: Test for vertical flame spread
of vertically-mounted bunched wires or
cables - Apparatus
1) 2)
IEC 60529 - Degrees of protection provided by EN 60529 1991
enclosures (IP Code) + corr. May 1993

IEC 60905 1987 Loading guide for dry-type power - -
transformers
1) 2)
IEC 61330 - High-voltage/low-voltage prefabricated EN 61330 1996
substations
1)
Undated reference.
2)
Valid edition at date of issue.

NORME CEI
INTERNATIONALE IEC
60076-11
INTERNATIONAL
Première édition
STANDARD
First edition
2004-05
Transformateurs de puissance –
Partie 11:
Transformateurs de type sec
Power transformers –
Part 11:
Dry-type transformers
© IEC 2004 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 any
utilisée sous quelque forme que ce soit et par aucun procédé, form or by any means, electronic or mechanical, including
électronique ou mécanique, y compris la photocopie et les photocopying and microfilm, without permission in writing from
microfilms, sans l'accord écrit de l'éditeur. the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: [phone] Telefax: [phone] E-mail: [e-mail] Web: www.iec.ch
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60076-11 © IEC:2004 – 3 –
CONTENTS
FOREWORD.9
1 Scope.13
2 Normative references.13
3 Definitions.15
4 Service conditions .15
4.1 General.15
4.2 Normal service conditions .15
4.3 Electromagnetic compatibility (EMC) .17
4.4 Provision for unusual service conditions .17
4.5 Transport and storage conditions .19
5 Tappings.19
6 Connections.19
7 Ability to withstand short circuit .19
8 Rating.21
8.1 General.21
8.2 Rated power.21
8.3 Preferred values of rated power .21
8.4 Operation at higher than rated voltage .21
8.5 Operation with fan cooling .21
8.6 Operation in an enclosure .21
9 Rating plate.23
9.1 Rating plate fitted to the transformer .23
9.2 Rating plate fitted to the transformer enclosure .23
10 Identification according to cooling method .23
10.1 Identification symbols.23
10.2 Arrangement of symbols.25
11 Temperature-rise limits.25
11.1 Normal temperature-rise limits.25
11.2 Reduced temperature rises for transformers designed for high cooling air
temperatures or special air cooling conditions .27
11.3 High altitude temperature rise correction .27
12 Insulation levels.27
12.1 General.27
12.2 Transformers for use at high altitudes .31
13 Climatic, environmental and fire behaviour classes.31
13.1 Climatic classes.31
13.2 Environmental classes.31
13.3 Fire behaviour classes.31
13.4 Test criteria for climatic, environmental and fire behaviour classes.33
14 General requirements for tests .33
15 Measurement of winding resistance (routine test) .33

60076-11 © IEC:2004 – 5 –
16 Measurement of voltage ratio and check of phase displacement (routine test) .35
17 Measurement of short-circuit impedance and load loss (routine test) .35
18 Measurement of no-load loss and current (routine test) .35
19 Separate-source AC withstand voltage test (routine test).35
20 Induced AC withstand voltage test (routine test) .35
21 Lightning impulse test (type test) .37
22 Partial discharge measurement (routine and special test) .37
22.1 General.37
22.2 Basic measuring circuit (typical only).37
22.3 Calibration of the measuring circuit .37
22.4 Voltage application.39
22.5 Partial discharge acceptance levels.41
23 Temperature-rise test (type test) .43
23.1 General.43
23.2 Methods of loading .43
23.3 Winding temperature-rise correction for reduced current .49
23.4 Determination of steady state conditions .49
24 Measurement of sound level (special test) .49
25 Short-circuit test (special test) .51
26 Environmental test (special test).51
26.1 General.51
26.2 Validity of the test .51
26.3 Testing procedure.51
27 Climatic test (special test) .53
27.1 Thermal shock test (special test) .53
27.2 Validity of the test .53
27.3 Thermal shock test for C1 class transformers .55
27.4 Thermal shock test for C2 class transformers .57
28 Fire behaviour test (special test) .57
28.1 Gene
...