EN 50708-2-3:2022

SLOVENSKI STANDARD
01-november-2022
Močnostni transformatorji - Dodatne evropske zahteve - 2-3. del: Srednji
močnostni transformatorji - Pribor
Power transformers - Additional European requirements - Part 2-3: Medium power
transformer - Accessories
Transformateurs de puissance - Exigences européennes supplémentaires - Partie 2-3 :
Transformateurs de moyenne puissance - Accessoires
Ta slovenski standard je istoveten z: EN 50708-2-3:2022
ICS:
29.180 Transformatorji. Dušilke Transformers. Reactors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 50708-2-3

NORME EUROPÉENNE
EUROPÄISCHE NORM September 2022
ICS 29.180
English Version
Power transformers - Additional European requirements -
Part 2-3: Medium power transformer - Accessories
Transformateurs de puissance - Exigences européennes Leistungstransformatoren - Zusätzliche europäische
supplémentaires - Partie 2-3 : Transformateurs de moyenne Anforderungen - Teil 2-3: Mittelleistungstransformatoren -
puissance - Accessoires Zubehör
This European Standard was approved by CENELEC on 2022-08-15. 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, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye 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
© 2022 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 50708-2-3:2022 E
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Service conditions . 5
5 Electrical characteristics . 5
6 Design requirements . 5
6.1 Liquid immersed transformers . 5
6.1.1 Type of liquid preservation system . 5
6.1.2 Terminals . 6
6.1.3 Terminal markings . 6
6.1.4 Distance between bushings . 6
6.1.5 Wheels . 6
6.1.6 Filling hole . 7
6.2 Dry-type transformers . 7
6.2.1 Terminals . 7
6.2.2 Terminal markings . 7
6.2.3 Wheels . 7
6.2.4 Enclosure. 7
7 Accessories . 7
7.1 Liquid immersed transformers . 7
7.2 Dry-type transformers . 9
Bibliography . 10
European foreword
This document (EN 50708-2-3:2022) has been prepared by CLC/TC 14 “Power transformers”.
The following dates are fixed:
• latest date by which this document has to be (dop) 2023-08-15
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) 2025-08-15
conflicting with this 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.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Introduction
This part of the EN 50708 series deals with the accessories.
For the purpose of this document, the requirements of the general EN 50708-1-1:2020 apply.
This document contains particular requirements for specific transformers or transformer applications, which
are based on the requirements of the general EN 50708-1-1:2020.
This document should be considered in conjunction with the requirements of the general parts.
The particular requirements of the different sub parts of EN 50708
...