EN 50708-2-4:2022

Power transformers - Additional European requirements - Part 2-4: Medium power transformer - Special tests

This document describes the special tests for Medium Power Transformers ≤ 3150 kVA compliant with the EN 50708 2 series: - for corrugated tank for liquid immersed transformers, - for the method of measurement of losses for one winding in Highest Voltage (HV) and windings in Lowest Voltage (LV) for liquid immersed and dry type transformers.

Leistungstransformatoren – Zusätzliche europäische Anforderungen - Teil 2-4: Mittelleistungstransformatoren – Sonderprüfungen

Transformateurs de puissance - Exigences européennes supplémentaires - Partie 2-4 : Transformateurs de moyenne puissance - Essais spéciaux

Le présent document décrit les essais spéciaux pour les transformateurs de moyenne puissance ≤ 3150 kVA conformes à la série EN 50708 2: - pour la cuve à plis pour les transformateurs immergés dans un liquide ; - pour la méthode de mesure des pertes pour un enroulement en haute tension (HT) et 2 enroulements en basse tension (BT) pour les transformateurs de type sec et les transformateurs immergés dans un liquide.

Močnostni transformatorji - Dodatne evropske zahteve - 2-4. del: Srednji močnostni transformatorji - Posebni preskusi

Ta dokument opisuje poseben preskus za srednje močnostne transformatorje ≤ 3150 kVA v skladu s skupino standardov EN 50708-2:
–   za transformatorje z rezervoarjem iz valovite pločevine, potopljene v tekočino;
–   za metodo merjenja izgub za eno navitje pri najvišji napetosti (HV) in dve navitji pri najnižji napetosti (LV) za transformator, potopljen v tekočino, in suhi transformator.

General Information

• Status: Published
• Publication Date: 08-Sep-2022
• ICS: 29.180 - Transformers. Reactors
• Technical Committee: CLC/TC 14 - Power transformers
• Drafting Committee: CLC/TC 14/WG 21 - Revision of HD 428 and HD 538
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 09-Sep-2022
• Due Date: 29-Jul-2022
• Completion Date: 09-Sep-2022
• Ref Project: SIST EN 50708-2-4:2022 - Power transformers - Additional European requirements - Part 2-4: Medium power transformer - Special tests

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 50708-2-4:2022
01-november-2022
Močnostni transformatorji - Dodatne evropske zahteve - 2-4. del: Srednji
močnostni transformatorji - Posebni preskusi
Power transformers - Additional European requirements - Part 2-4: Medium power
transformer - Special tests
Transformateurs de puissance - Exigences européennes supplémentaires - Partie 2-4 :
Transformateurs de moyenne puissance - Essais spéciaux
Ta slovenski standard je istoveten z: EN 50708-2-4:2022
ICS:
29.180 Transformatorji. Dušilke Transformers. Reactors
SIST EN 50708-2-4:2022 en,fr
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 50708-2-4:2022


EUROPEAN STANDARD EN 50708-2-4

NORME EUROPÉENNE

EUROPÄISCHE NORM September 2022
ICS 29.180
English Version
Power transformers - Additional European requirements - Part 2-
4: Medium power transformer - Special tests
Transformateurs de puissance - Exigences européennes Leistungstransformatoren - Zusätzliche europäische
supplémentaires - Partie 2-4 : Transformateurs de moyenne Anforderungen - Teil 2-4: Mittelleistungstransformatoren -
puissance - Essais spéciaux Sonderprüfungen
This European Standard was approved by CENELEC on 2022-07-25. 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,
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
© 2022 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN 50708-2-4:2022 E

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EN 50708-2-4:2022 (E)

Contents Page
Contents . 3
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Service conditions . 6
5 Special test for corrugated tank . 6
5.1 General information . 6
5.2 Temperature variation . 6
5.3 Sealing temperature . 7
5.4 Calculation of the liquid volume variation . 7
5.5 Test procedure . 7
5.5.1 General . 7
5.5.2 Measurement of pressure range . 7
5.5.3 Endurance test . 8
5.5.4 Leakage test .
...