EN IEC 60076-22-1:2019

SLOVENSKI STANDARD
01-julij-2019
Močnostni transformatorji - 22-1. del: Oprema močnostnega transformatorja in
dušilke - Zaščitne naprave
Power transformers - Part 22-1: Power transformer and reactor fittings – Protective
devices
Leistungstransformatoren und Drosselspulen Anbauten - Teil 22-1: Schutzeinrichtungen
Transformateurs de puissance - Partie 22-1: Accessoires pour transformateurs de
puissance et bobines d'inductance - Dispositifs de protection
Ta slovenski standard je istoveten z: EN IEC 60076-22-1:2019
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 60076-22-1

NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2019
ICS 29.180
English Version
Power transformers - Part 22-1: Power transformer and reactor
fittings - Protective devices
(IEC 60076-22-1:2019)
Transformateurs de puissance - Partie 22-1: Accessoires Leistungstransformatoren und Drosselspulen Anbauten -
pour transformateurs de puissance et bobines d'inductance Teil 22-1: Schutzeinrichtungen
- Dispositifs de protection (IEC 60076-22-1:2019)
(IEC 60076-22-1:2019)
This European Standard was approved by CENELEC on 2019-03-05. 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
© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60076-22-1:2019 E

European foreword
The text of document 14/992/FDIS, future edition 1 of IEC 60076-22-1, 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) 2019-12-05
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2022-03-05
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 shall not be held responsible for identifying any or all such patent rights.

Endorsement notice
The text of the International Standard IEC 60076-22-1:2019 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 60076-6 NOTE Harmonized as EN 60076-6
IEC 60255-27 NOTE Harmonized as EN 60255-27
ISO 9001 NOTE Harmonized as EN ISO 9001

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 1991 Environmental testing - Part 3-3: Guidance EN 60068-3-3 1993
- Seismic test methods for equipments
IEC 60076-1 2011 Power transformers - Part 1: General EN 60076-1 2011
IEC 60076-7 -  Power transformers -- Part 7: Loading - -
guide for oil-immersed power transformers
IEC 60296 -  Fluids for electrotechnical applications - EN 60296 -
Unused mineral insulating oils for
transformers and switchgear
IEC 60529 -  Degrees of protection provided by - -
enclosures (IP Code)
IEC 60721-3-4 -  Classification of environmental conditions - EN 60721-3-4 -
Part 3: Classification of groups of
environmental parameters and their
severities - Section 4: Stationary use at
non-weatherprotected locations
IEC 60947-5-1 -  Low-voltage switchgear and controlgear - EN 60947-5-1 -
Part 5-1: Control circuit devices and
switching elements - Electromechanical
control circuit devices
ISO 228-1 -  Pipe threads where pressure-tight joints EN ISO 228-1 -
are not made on the threads -- Part 1:
Dimensions, tolerances and designation
ISO 12944-6 -  Paints and varnishes - Corrosion protection EN ISO 12944-6 -
of steel structures by protective paint
systems - Part 6: Laboratory performance
test methods
IEC 60076-22-1 ®
Edition 1.0 2019-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Power transformers –
Part 22-1: Power transformer and reactor fittings – Protective devices

Transformateurs de puissance –

Partie 22-1: Accessoires pour transformateurs de puissance et bobines

d'inductance – Dispositifs de protection

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.180 ISBN 978-2-8322-6505-5

– 2 – IEC 60076-22-1:2019 © IEC 2019
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 9
4 Service conditions . 10
4.1 General . 10
4.2 Degree of protection . 10
4.3 Corrosion protection . 11
4.4 Resistance to ambient conditions . 11
4.5 Insulating liquid characteristics . 11
4.6 Vibration withstand . 11
4.7 Seismic requirements. 11
5 Characteristics of switches . 11
5.1 General . 11
5.2 Dielectric strength (in accordance with IEC 60255-27) . 11
6 General requirements for routine and type test . 12
7 Protective devices . 12
7.1 Gas and liquid actuated relay (Buchholz relay) . 12
7.1.1 Additional service conditions . 12
7.1.2 Mechanical requirements . 12
7.1.3 Performance requirements . 16
7.1.4 Tests . 17
7.2 Gas and liquid sampling device at man’s height . 20
7.2.1 Additional service conditions – Operating pressure . 20
7.2.2 Mechanical requirements . 20
7.2.3 Performance requirements – Visibility . 20
7.2.4 Tests . 20
7.3 Protective relay for hermetically sealed liquid-immersed equipment . 21
7.3.1 Additional service conditions . 21
7.3.2 Mechanical requirements . 22
7.3.3 Performance requirements . 24
7.3.4 Tests . 25
7.4 Direct reading dial type liquid level indicators . 27
7.4.1 Mechanical requirements . 27
7.4.2 Performance requirements . 28
7.4.3 Tests . 28
7.5 Liquid flow indicators . 29
7.5.1 Mechanical requirements . 29
7.5.2 Performance requirements . 31
7.5.3 Tests . 31
7.6 Pressure relief devices. 33
7.6.1 Additional service conditions . 33
7.6.2 Mechanical requirements . 33
7.6.3 Performance requirements . 36
7.6.4 Tests . 37

IEC 60076-22-1:2019 © IEC 2019 – 3 –
7.7 Pressure relief valves . 38
7.7.1 Additional service conditions . 38
7.7.2 Mechanical requirements . 38
7.7.3 Performance requirements – Nominal operating pressure . 39
7.7.4 Tests . 39
7.8 Direct reading mechanical dial type liquid temperature indicators . 40
7.8.1 Mechanical requirements . 40
7.8.2 Performance requirements . 41
7.8.3 Tests . 42
7.9 Direct reading mechanical dial type winding temperature indicators . 44
7.9.1 Mechanical requirements . 44
7.9.2 Performance requirements . 46
7.9.3 Tests . 47
7.10 Shutter valve. 48
7.10.1 Additional service conditions . 48
...