EN 50464-2-2:2007

SLOVENSKI STANDARD
01-september-2007
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Three-phase oil-immersed distribution transformers 50 Hz, from 50 kVA to 2 500 kVA
with highest voltage for equipment not exceeding 36 kV -- Part 2-2: Distribution
transformers with cable boxes on the high-voltage and/or low-voltage side - Cable boxes
type 1 for use on distribution transformers meeting the requirements of EN 50464-2-1
Ölgefüllte Drehstrom-Verteilungstransformatoren 50 Hz, 50 kVA bis 2 500 kVA, mit einer
höchsten Spannung für Betriebsmittel bis 36 kV -- Teil 2-2: Verteilungstransformatoren
mit Kabelanschlusskästen auf der Ober- und/oder Unterspannungsseite -
Kabelanschlusskästen Typ 1 für Verteilungstransformatoren nach EN 50464-2-1
Transformateurs triphasés de distribution immergés dans l'huile, 50 Hz, de 50 kVA a 2
500 kVA, de tension la plus élevée pour le matériel ne dépassant pas 36 kV -- Partie 2-2:
Transformateurs de distribution raccordés par boîtes a câble côté haute tension et/ou
côté basse tension - Boîtes a câbles de type 1 pour utilisation sur transformateurs de
distribution conformes aux exigences de la EN 50464-2-1
Ta slovenski standard je istoveten z: EN 50464-2-2:2007
ICS:
29.180 Transformatorji. Dušilke Transformers. Reactors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 50464-2-2
NORME EUROPÉENNE
April 2007
EUROPÄISCHE NORM
ICS 29.180 Supersedes HD 428.2.2 S1:1997
English version
Three-phase oil-immersed distribution transformers
50 Hz, from 50 kVA to 2 500 kVA with highest voltage
for equipment not exceeding 36 kV -
Part 2-2: Distribution transformers with cable boxes
on the high-voltage and/or low-voltage side -
Cable boxes type 1 for use on distribution transformers
meeting the requirements of EN 50464-2-1

Transformateurs triphasés de distribution Ölgefüllte
immergés dans l'huile, Drehstrom-Verteilungstransformatoren
50 Hz, de 50 kVA à 2 500 kVA, 50 Hz, 50 kVA bis 2 500 kVA,
de tension la plus élevée mit einer höchsten Spannung
pour le matériel ne dépassant pas 36 kV - für Betriebsmittel bis 36 kV -
Partie 2-2: Transformateurs de distribution Teil 2-2: Verteilungstransformatoren
raccordés par boîtes à câble côté haute mit Kabelanschlusskästen auf der
tension et/ou côté basse tension - Ober- und/oder Unterspannungsseite -
Boîtes à câbles de type 1 pour utilisation Kabelanschlusskästen Typ 1
sur transformateurs de distribution für Verteilungstransformatoren
conformes aux exigences nach EN 50464-2-1
de la EN 50464-2-1
This European Standard was approved by CENELEC on 2006-12-01. 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, Bulgaria, 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

© 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50464-2-2:2007 E
Foreword
The text of the Harmonization Document HD 428.2.2 S1:1997, prepared by the Technical Committee
CENELEC TC 14, Power transformers, was submitted to the formal vote for conversion into a
European Standard and was approved by CENELEC as EN 50464-2-2 on 2006-12-01.
The following date was 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) 2007-12-01
The EN 50464 series consists of the following parts, under the general title “Three-phase oil-immersed
distribution transformers 50 Hz, from 50 kVA to 2 500 kVA with highest voltage for equipment not
exceeding 36 kV”:
Part 1 General requirements
Part 2-1 Distribution transformers with cable boxes on the high-voltage and/or low-voltage
side – General requirements
Part 2-2 Distribution transformers with cable boxes on the high-voltage and/or low-voltage
side – Cable boxes type 1 for use on distribution transformers meeting the
requirements of EN 50464-2-1
Part 2-3 Distribution transformers with cable boxes on the high-voltage and/or low-voltage
side – Cable boxes type 2 for use on distribution transformers meeting the
requirements of EN 50464-2-1
Part 3 Determination of the power rating of a transformer loaded with non-sinusoidal
currents
Part 4 Requirements and tests concerning pressurised corrugated tanks

– 3 – EN 50464-2-2:2007
Contents
1 Scope.4
2 Normative references.4

3 Definitions.4
4 Electrical requirements and clearances .5
4.1 General. 5
4.2 High voltage enclosures . 7
4.3 Low voltage boxes . 8
5 Design considerations.7

5.1 General. 8
5.2 Terminal nuts and stems . 8
5.3 Provision for glanding cables. 8
5.4 Termination of cables within enclosure . 8
6 Testing .7
6.1 Type tests. 9
6.2 Routine tests. 9
7 Earthing of cable boxes .8
Figure
Figure 1 – Clearance distances .5
Table
Table 1 – Three phase cable box, Type 1.6

1 Scope
This European Standard specifies the requirements for cable boxes, Type 1, in which the cable cores are
terminated. The cable boxes are suitable for use on transformers defined in EN 50464-2-1, "Distribution
Transformers with Cable Boxes", for side mounted or cover mounted use. T
...