EN 50299-1:2014
(Main)Oil-immersed cable connection assemblies for transformers and reactors having highest voltage for equipment Um from 72,5 kV to 550 kV - Part 1: Fluid-filled cable terminations
Oil-immersed cable connection assemblies for transformers and reactors having highest voltage for equipment Um from 72,5 kV to 550 kV - Part 1: Fluid-filled cable terminations
This European Standard covers the oil-immersed single-phase connection assembly of cables for transformers and reactors, designed in accordance with EN 60076 series. NOTE In the standard the term "transformer" is used as common definition for transformer and reactor. The purpose of EN 50299-1 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 50299-1 does not cover direct cable terminations (see 3.1.1.3), 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 - Teil 1: Flüssigkeitsgefüllte Kabelendverschlüsse
Boîte de raccordement de câble pour transformateurs immergés et bobine d'inductance de tensions comprises entre 72,5 kV et 550 kV - Partie 1: Extrémité de câble remplie d’un fluide
Povezovalni sestavi oljnih kablov za transformatorje in dušilke, pri katerih je najvišja napetost opreme Um od 72,5 kV do 550 kV - 1. del: S tekočino polnjeni kabelski priključki
Ta evropski standard obravnava povezovalne sestave oljnih enofaznih kablov za transformatorje in dušilke, zasnovane v skladu s skupino standardov EN 60076. OPOMBA Izraz »transformator« je v standardu uporabljen kot splošni izraz za transformator in dušilko. Namen standarda EN 50299-1 je za sestave kablov določiti:
• električne in mehanske zahteve, vključno z medsebojno zamenljivostjo;
• omejitve dobave;
• preskus, ki ga je treba izvesti.
Standard po potrebi dopolnjuje in popravlja ustrezne standarde IEC, uporablja pa se za oljne kabelske povezave, primerne za s tekočino polnjene ali suhe kabelske priključke.
Standard EN 50299-1 ne obravnava neposrednih kabelskih priključkov (glej točko 3.1.1.3), vendar pa se lahko v tem primeru uporabi kot vodilo, če se tako dogovorita kupec in dobavitelj (z izjemo slik 1 in 2, ki se ne uporabljata). Ta standard se uporablja za oljne kabelske priključne vtičnice na transformatorjih, pri katerih je najvišja napetost opreme Um od 72,5 kV do 550 kV, vključno s priključkom električnega prevodnika na strani kabelskega končnika transformatorja.
General Information
- Status
- Published
- Publication Date
- 13-Nov-2014
- Withdrawal Date
- 12-Oct-2017
- Technical Committee
- CLC/TC 14 - Power transformers
- Drafting Committee
- CLC/TC 14 - Power transformers
- Current Stage
- 6060 - Document made available - Publishing
- Start Date
- 14-Nov-2014
- Due Date
- 10-Aug-2015
- Completion Date
- 14-Nov-2014
Relations
- Effective Date
- 28-Jan-2023
Overview
The EN 50299-1:2014 standard governs oil-immersed cable connection assemblies for transformers and reactors with the highest voltage for equipment (Um) ranging from 72.5 kV up to 550 kV. Developed by the European Committee for Electrotechnical Standardization (CLC), this standard specifically addresses the fluid-filled cable terminations used in such high-voltage equipment, designed in accordance with the EN 60076 series.
The primary objective of EN 50299-1 is to define the electrical and mechanical requirements, establish the limits of supply, and specify the tests to be performed on cable connection assemblies that connect power cables to transformers and reactors. It ensures the interchangeability, reliability, and safety of oil-immersed cable connections, which are critical components in high-voltage electrical infrastructure.
Key Topics
Scope: Applies to oil-immersed single-phase cable connection assemblies on transformers and reactors rated for Um from 72.5 kV to 550 kV. The term "transformer" includes reactors within the context of the standard.
Electrical and Mechanical Requirements:
- Rated voltages and currents must align with EN 60076 transformer requirements.
- Mechanical robustness includes oil-tightness, corrosion protection, and resistance to mechanical forces such as static 2 kN transverse forces.
- Connection interfaces must use materials like bare copper or coated copper/aluminum to ensure reliability and temperature limits consistent with cable insulation ratings.
Interchangeability & Compatibility:
- The standard defines interface dimensions and connection protocols to promote interchangeability of cable terminations across compliant equipment.
- Dimensions correspond with harmonized standards such as EN 62271-209.
Testing Protocols:
- Factory tests include dimensional verification, vacuum/pressure endurance, dielectric performance, and mechanical strength tests.
- Post-installation tests cover dielectric testing with representative cables under transformer oil conditions, ensuring system integrity after installation.
- The standard includes guidance on corona shield requirements and disconnection facilities to protect transformer insulation during testing.
Rated Values & Preferred Parameters:
- Highest voltage levels of equipment standardized from 72.5 kV up to 550 kV.
- Rated currents selected at least 20% above the transformer rated current, ranging from 1000 A to 3150 A.
- Test voltages and currents align with IEC and EN series reference documents (e.g., EN 60076, IEC 60840).
Applications
EN 50299-1:2014 is instrumental for:
Transformer and Reactor Manufacturing: Ensures a unified approach for cable connection assemblies in oil-filled transformers and reactors, facilitating safer, more efficient production lines and interoperability between equipment from multiple suppliers.
High Voltage Cable Systems: Critical for the design and installation of high-voltage power transmission networks where reliable oil-immersed cable feedthroughs are necessary for connection integrity and operational safety.
Maintenance and Quality Assurance: Provides detailed testing and verification methods utilized by utilities and service providers to maintain and inspect cable connection assemblies, ensuring ongoing system performance and preventing failures.
Electrical Infrastructure Standardization: EN 50299-1 supports the harmonization of electrical equipment standards across European markets, supporting suppliers, manufacturers, and operators in complying with regional regulations and interoperability requirements.
Related Standards
EN 50299-1 works in conjunction with several related international and European standards, including:
- EN 60076 Series - Power transformers: foundational for transformer design and testing.
- EN 60296 - Specification for mineral insulating oils used in transformers.
- IEC 60141 Series - Testing methods for oil-filled cables and accessories.
- IEC 60840 and IEC 62067 - Power cables with extruded insulation and their test requirements.
- HD 632 S2 - European guidelines for power cables with extruded insulation.
- EN 50299-2 - Covers dry-type cable terminations, complementing the fluid-filled termination focus of EN 50299-1.
- EN ISO 1302 - Surface texture specifications used for the product documentation in cable terminations.
Keywords: oil-immersed cable connection assemblies, fluid-filled cable terminations, transformers, reactors, high voltage equipment, cable termination standards, EN 50299-1, electrical requirements, mechanical requirements, power transformers, cable connection boxes, dielectric testing, CENELEC standards, high voltage cable systems, transformer cable assemblies.
Frequently Asked Questions
EN 50299-1:2014 is a standard published by CLC. Its full title is "Oil-immersed cable connection assemblies for transformers and reactors having highest voltage for equipment Um from 72,5 kV to 550 kV - Part 1: Fluid-filled cable terminations". This standard covers: This European Standard covers the oil-immersed single-phase connection assembly of cables for transformers and reactors, designed in accordance with EN 60076 series. NOTE In the standard the term "transformer" is used as common definition for transformer and reactor. The purpose of EN 50299-1 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 50299-1 does not cover direct cable terminations (see 3.1.1.3), 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.
This European Standard covers the oil-immersed single-phase connection assembly of cables for transformers and reactors, designed in accordance with EN 60076 series. NOTE In the standard the term "transformer" is used as common definition for transformer and reactor. The purpose of EN 50299-1 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 50299-1 does not cover direct cable terminations (see 3.1.1.3), 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.
EN 50299-1:2014 is classified under the following ICS (International Classification for Standards) categories: 29.180 - Transformers. Reactors. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 50299-1:2014 has the following relationships with other standards: It is inter standard links to EN 50299:2002. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase EN 50299-1:2014 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of CLC standards.
Standards Content (Sample)
SLOVENSKI STANDARD
01-maj-2015
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SIST EN 50299:2004
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Oil-immersed cable connection assemblies for transformers and reactors having highest
voltage for equipment Um from 72,5 kV to 550 kV - Part 1: Fluid-filled cable terminations
Ölgefüllte Kabelanschlusseinheiten für Transformatoren und Drosselspulen mit einer
höchsten Spannung für Betriebsmittel Um von 72,5 kV bis 550 kV - Teil 1:
Flüssigkeitsgefüllte Kabelendverschlüsse
Boîte de raccordement de câble pour transformateurs immergés et bobine d'inductance
de tensions comprises entre 72,5 kV et 550 kV -- Partie 1: Extrémité de câble remplie
d’un fluide
Ta slovenski standard je istoveten z: EN 50299-1:2014
ICS:
29.060.20 Kabli Cables
29.180 Transformatorji. Dušilke Transformers. Reactors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN 50299-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2014
ICS 29.180 Supersedes EN 50299:2002 (PART)
English Version
Oil-immersed cable connection assemblies for transformers and
reactors having highest voltage for equipment Um from 72,5 kV
to 550 kV - Part 1: Fluid-filled cable terminations
Boîte de raccordement de câble pour transformateurs Ölgefüllte Kabelanschlusseinheiten für Transformatoren
immergés et bobine d'inductance de tensions comprises und Drosselspulen mit einer höchsten Spannung für
entre 72,5 kV et 550 kV - Partie 1: Extrémité de câble Betriebsmittel Um von 72,5 kV bis 550 kV - Teil 1:
remplie d'un fluide Flüssigkeitsgefüllte Kabelendverschlüsse
This European Standard was approved by CENELEC on 2014-10-13. 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, 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: Avenue Marnix 17, B-1000 Brussels
© 2014 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 50299-1:2014 E
Contents
Foreword .3
1 Scope .4
2 Normative references .4
3 Terms and definitions .5
4 Limits of supply .5
5 Rated values .5
6 Preferred values .5
6.1 Highest voltage for equipment (U ) .5
m
6.2 Rated currents (I ) .6
r
6.3 Transformer test voltages .6
6.4 Transformer test currents .6
6.5 Cable installation test voltage .6
7 Requirements .6
7.1 Connection interface .6
7.2 Mechanical requirements .6
7.3 Dimensions .6
7.4 Protection against corrosion .7
7.5 Mechanical forces on cable terminations .7
8 Tests .7
8.1 Factory tests .7
8.2 Tests after installation .7
Bibliography . 11
Figures
Figure 1 – Limits of supply between transformer and cable termination .8
Figure 2 – Typical arrangement of cable connection assemblies .9
– 3 – EN 50299-1:2014
Foreword
This document (EN 50299-1:2014) has been prepared by CLC/TC 14 "Power transformers".
The following dates are fixed:
• latest date by which this document has (dop) 2015-10-13
to be implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2017-10-13
• latest date by which the national
standards conflicting with this
document have to be withdrawn
This document partially supersedes EN 50299:2002, together with EN 50299-2:2014. Changes have been
made in this document to bring it line with EN 50299-2:2014.
Dimensions mentioned in EN 50299-1 are valid for fluid-filled cable terminations. Dry-type cable terminations
may also fit to these requirements.
A new standard EN 50299-2 is issued which describes requirements for dry-type cable terminations only.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent rights.
_______________
1 Scope
This European Standard covers the oil-immersed single-phase connection assembly of cables for
transformers and reactors, designed in accordance with EN 60076 series.
NOTE In the standard the term "transformer" is used as common definition for transformer and reactor.
The purpose of EN 50299-1 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 50299-1 does not cover direct cable terminations (see 3.1.1.3), 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 the cable sealing end of the
m
transformer.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
EN 60076 Series Power transformers (IEC 60076 Series)
EN 60296 Fluids for electrotechnical applications — Unused mineral insulating oils for transformers
and switchgear (IEC 60296)
EN ISO 1302 Geometrical product specifications (GPS) — Indication of surface texture in technical
product documentation (ISO 1302)
IEC 60141 Series Tests on oil-filled and gas-pressure cables and their accessories
IEC 60840 Power cables with extruded insulation and their accessories for rated voltages above
30 kV (U = 36 kV) up to 150 kV (U = 170 kV) — Test methods and requirements
m m
IEC 62067 Power cables with extruded insulation and their accessories for rated voltages above
150 kV (U = 170 kV) up to 500 kV (U = 550 kV) — Test methods and requirements
m m
HD 632 S2 Power cables with extruded insulation and their accessories for rated voltages above
36 kV (U = 42 kV) up to 150 kV (U = 170 kV)
m m
– 5 – EN 50299-1:2014
3 Terms and definitions
For the purposes of this document, the following terms and 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
3.1.1
cable ter
...
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