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EUROPEAN STANDARD
EN 60076-13
NORME EUROPÉENNE
October 2006
EUROPÄISCHE NORM
ICS 29.180
English version
Power transformers
Part 13: Self-protected liquid-filled transformers
(IEC 60076-13:2006)
Transformateurs de puissance  Leistungstransformatoren
Partie 13: Transformateurs auto-protégés Teil 13: Selbstgeschützte
immergés dans un liquide diélectrique flüssigkeitsgefüllte Transformatoren
(CEI 60076-13:2006) (IEC 60076-13:2006)

This European Standard was approved by CENELEC on 2006-09-01. 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, 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

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60076-13:2006 E
Foreword
The text of document 14/530/FDIS, future edition 1 of IEC 60076-13, prepared by IEC TC 14, Power
transformers, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as
EN 60076-13 on 2006-09-01.
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) 2007-06-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2009-09-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60076-13:2006 was approved by CENELEC as a European
Standard without any modification.
__________
- 3 - EN 60076-13:2006
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 (mod) 1993 Power transformers EN 60076-1 1997
Part 1: General A11 1997
A1 1999 A1 2000
A12 2002
1) 2)
IEC 60076-2 (mod) - Power transformers EN 60076-2 1997
Part 2: Temperature rise
IEC 60076-3 2000 Power transformers
+ corr. December 2000 Part 3: Insulation levels, dielectric tests and EN 60076-3 2001
external clearances in air
3)
IEC 60076-5 2000 Power transformers EN 60076-5 2000
Part 5: Ability to withstand short circuit

1)
IEC 60076-7 - Power transformers - -
Part 7: Loading guide for oil-immersed power
transformers
1) 2)
IEC 60137 - Insulated bushings for alternating voltages EN 60137 2003
above 1 000 V
1) 2)
IEC 60270 - High-voltage test techniques - Partial EN 60270 2001
discharge measurements
1) 2)
IEC 60282-1 - High-voltage fuses EN 60282-1 2006
Part 1: Current-limiting fuses

1) 2)
IEC 60296 - Fluids for electrotechnical applications - EN 60296 2004
Unused mineral insulating oils for + corr. September 2004
transformers and switchgear
1) 2)
IEC 60836 - Specifications for unused silicone insulating EN 60836 2005
liquids for electrotechnical purposes

1) 2)
IEC 61099 - Specification for unused synthetic organic EN 61099 1992
esters for electrical purposes

1)
Undated reference.
2)
Valid edition at date of issue.
3)
EN 60076-5 is superseded by EN 60076-5:2006, which is based on IEC 60076-5:2006.

NORME CEI
INTERNATIONALE
IEC
60076-13
INTERNATIONAL
Première édition
STANDARD
First edition
2006-05
Transformateurs de puissance –
Partie 13:
Transformateurs auto-protégés
immergés dans un liquide diélectrique

Power transformers –
Part 13:
Self-protected liquid-filled transformers

 IEC 2006 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: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
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PRICE CODE
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International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
Pour prix, voir catalogue en vigueur
For price, see current catalogue

60076-13  IEC:2006 – 3 –
CONTENTS
FOREWORD.5

1 Scope.9
2 Normative references .9
3 Terms and definitions .11
4 Service conditions .11
5 Electrical characteristics.11
5.1 Rated power.11
5.2 Highest voltage for equipment .11
5.3 Windings .13
5.4 Tappings .13
5.5 Connection group .13
5.6 Dimensioning of the low-voltage winding neutral connection.13
5.7 Short-circuit impedance.13
5.8 Insulation levels and dielectric tests .13
5.9 Temperature rise limits at rated power .15
5.10 Overload capability.15
6 Self-protection and disconnection device (SPDD) .15
6.1 Functional requirements .15
6.2 Coordination principle.15
6.3 Mechanical requirements.17
7 Constructional requirements .17
7.1 Liquid preservation system.17
7.2 Bushings .17
7.3 Dielectric liquid and component materials.17
7.4 Disconnection function .17
8 Information to be supplied by the customer .17
9 Information to be supplied by the manufacturer .19
10 Rating plate.19
11 Tests .19
11.1 List and classification of tests (routine, type and special tests) .19
11.2 Routine tests .19
11.3 Type tests .19
11.4 Short-circuit test with the self-protection and disconnection device
disconnected or bypassed .21
12 Test procedure .23
12.1 Measurement of partial discharges .23
12.2 Transformer pressure test .23
12.3 Switching cycle tests .25
12.4 Behaviour test of self-protection and disconnection device .25

Figure 1 – Partial discharge measurement cycle .23

Table 1 – Order for tests carried out on prototypes A, B, C, D, E .21

60076-13  IEC:2006 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
POWER TRANSFORMERS –
Part 13: Self-protected liquid-filled transformers

FOREWORD
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