SIST EN 50299:2004
(Main)Oil-immersed cable connection assemblies for transformers and reactors having highest voltage for equipment Um from 72,5 kV to 550 kV
Oil-immersed cable connection assemblies for transformers and reactors having highest voltage for equipment Um from 72,5 kV to 550 kV
This standard covers the oil-immersed single-phase connection assembly of cables for transformers and reactors, designed in accordance with EN 60076 series and with EN 60289, respectively.
NOTE In the standard the term "transformer" is used as common definition for transformer and reactor.
The purpose of EN 50299 is to establish for the cable assemblies:
• the electrical and mechanical requirements, including interchangeability;
• the limits of supply;
• the test to be carried out.
It complements and amends, if necessary, the relevant IEC standards and applies to oil immersed cable connections, suitable for fluid-filled or dry-type cable terminations.
EN 50299 does not cover direct cable terminations (see 3.3.3), but, in this case, upon agreement between purchaser and supplier, the standard may be used for guidance except for Figure 1 and Figure 2 which are not applicable.
This standard applies to oil-immersed cable connection boxes on transformers with highest voltage for equipment Um = 72,5 kV to 550 kV, including the current conductor terminal at the cable sealing end of the transformer.
Ölgefüllte Kabelanschlusseinheiten für Transformatoren und Drosselspulen mit einer höchsten Spannung für Betriebsmittel Um von 72,5 kV bis 550 kV
Boîte de raccordement de câble pour transformateurs immergés et bobine d'inductance de tensions comprises entre 72,5 kV et 550 kV
Oil-immersed cable connection assemblies for transformers and reactors having highest voltage for equipment Um from 72,5 kV to 550 kV
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Standards Content (Sample)
SLOVENSKI SIST EN 50299:2004
STANDARD
februar 2004
Oil-immersed cable connection assemblies for transformers and reactors having
highest voltage for equipment Um from 72,5 kV to 550 kV
ICS 29.180 Referenčna številka
SIST EN 50299:2004(en)
© Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno
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EUROPEAN STANDARD EN 50299
NORME EUROPÉENNE
EUROPÄISCHE NORM November 2002
ICS 29.180 Incorporates Corrigendum April 2004
English version
Oil-immersed cable connection assemblies for transformers and reactors
having highest voltage for equipment U from 72,5 kV to 550 kV
m
Boîte de raccordement de câble Ölgefüllte Kabelanschlusseinheiten für
pour transformateurs immergés Transformatoren und Drosselspulen mit
et bobine d'inductance de tensions einer höchsten Spannung für
comprises entre 72,5 kV et 550 kV Betriebsmittel U von 72,5 kV bis 550 kV
m
This European Standard was approved by CENELEC on 2002-10-01. 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, Czech Republic,
Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta,
Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and 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
© 2002 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50299:2002 E
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EN 50299:2002 – 2 –
Foreword
This European Standard was prepared by the CENELEC Technical Committee TC 14,
Power transformers.
The text of the draft was submitted to the formal vote and was approved by CENELEC as
EN 50299 on 2002-10-01.
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) 2003-10-01
- latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2005-10-01
The contents of the corrigendum of April 2004 have been included in this copy.
__________
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– 3 – EN 50299:2002
Contents
1 Scope.4
2 Normative references.4
3 Definitions.5
4 Limits of supply. 6
5 Rated values.6
6 Preferred values.6
6.1 Highest voltage for equipment. 6
6.2 Rated current.6
7 Requirements.6
7.1 Temperature of connection interface . 6
7.2 Mechanical requirements . 7
7.3 Standard dimensions . 7
7.4 Disconnecting link. 7
7.5 Protection against corrosion. 7
7.6 Mechanical forces on cable terminations . 8
8 Tests. 8
8.1 Factory tests.8
8.2 Tests after installation. 8
Figure 1 – Limits of supply for transformer end terminal and cable termination.10
Figure 2 – Standard dimensions for cable connection assembly.11
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EN 50299:2002 – 4 –
1 Scope
This standard covers the oil-immersed single-phase connection assembly of cables for
transformers and reactors, designed in accordance with EN 60076 series and with
EN 60289, respectively.
NOTE In the standard the term "transformer" is used as common definition for transformer and reactor.
The purpose of EN 50299 is to establish for the cable assemblies:
• the electrical and mechanical requirements, including interchangeability;
• the limits of supply;
• the test to be carried out.
It complements and amends, if necessary, the relevant IEC standards and applies to oil
immersed cable connections, suitable for fluid-filled or dry-type cable terminations.
EN 50299 does not cover direct cable terminations (see 3.3.3), but, in this case, upon
agreement between purchaser and supplier, the standard may be used for guidance except
for Figure 1 and Figure 2 which are not applicable.
This standard applies to oil-immersed cable connection boxes on transformers with highest
voltage for equipment U = 72,5 kV to 550 kV, including the current conductor terminal at
m
the cable sealing end of the transformer.
2 Normative references
This European Standard incorporates, by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and
the publications are listed hereafter. For dated references, subsequent amendments to or
revisions of any of these publications apply to this European Standard only
when incorporated in it by amendment or revision. For undated references the latest edition
of the publication referred to applies (including amendments).
EN 60076 Series Power transformers (IEC 60076 series, mod.)
EN 60289 Reactors (IEC 60289, mod.)
IEC 60141 Series Test on oil-filled and gas-pressure cables and their accessories
IEC 60296 Specification for unused mineral insulating oils for transformers
and switchgear
IEC 60840 Power cables with extruded insulation and their accessories for
rated voltages above 30 kV (U = 36 kV) up to 150 kV
m
(U = 170 kV) – Test methods and requirements
m
IEC/TR2 61639 Direct connection between power transformers and
gas-insulated metal-enclosed switchgear for rated voltages of
72,5 kV and above
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– 5 – EN 50299:2002
3 Definitions
For the purposes of this European Standard the following definitions apply.
3.1
cable-connection assembly
combination of a cable termination and a cable connection box which mechanically and
electrically connects the cable to the transformer
3.2
cable connection box
part of the transformer which houses the cable termination and the interface to the
transformer connection
3.3
cable termination
equipment fitted to the end of a cable to ensure electrical connection with other parts of the
system and to maintain the insulation up to the point of connection
3.3.1
fluid-filled cable termination
cable termination which includes an insulating fluid as part of the cable connection
assembly and comprises a segregation between said cable fluid in the cable connection box
3.3.2
dry-type cable termination
cable termination which comprises an elastomeric electrical stress control component in
intimate contact with a separating insulating barrier between the cable insulation and the
insulation of the cable connection box. The cable termination does not require any
insulating fluid
3.3.3
direct cable termination
cable termination directly fitted on the end of the cable without any separating insulating
barrier between the cable insulation and the insulation of the cable connection box. The
cable enters directly into the cable box via a gland
3.4
disconnect chamber
cable connection box which has an oil/oil bushing fitted between the box and the main
transformer tank, in such a manner as to prevent, in service conditions, direct
communi
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