SIST EN 2234:2012
(Main)Aerospace series - Cable, electrical, fire resistant - Technical specification
Aerospace series - Cable, electrical, fire resistant - Technical specification
This European Standard specifies the required characteristics and test procedures for fire resistant or fireproof electrical cables for use in aircraft electrical systems. These cables should also maintain a specific surface resistance when they are subjected to a flame of 1 100 °C after 5 minutes (fire resistant) or 15 minutes (fire-proof) exposure. They should be rated at an a.c. voltage of 600 V r.m.s., a frequency of maximum 2 000 Hz and a long term temperature of up to 260 °C (ambient temperature plus temperature rise in conductor).
Luft- und Raumfahrt - Elektrische Leitungen, feuerbeständig - Technische Lieferbedingungen
Série aérospatiale - Câbles électriques résistant au feu - Spécification technique
Cette Norme Européenne spécifie les caractéristiques requises et les procédures d’essais pour les câbles résistant au feu ou ignifugés, utilisés dans les systèmes électriques des aéronefs. Ces câbles doivent aussi maintenir une surface spécifique lorsqu’ils sont soumis à une flamme de 1 100 °C après 5 minutes d’exposition (résistant au feu) ou après 15 minutes d’exposition (ignifugé).
Ils doivent fonctionner à une tension nominale de 600 V c.a., valeur efficace, une fréquence maximale de 2 000 Hz et une température continue ne dépassant pas 260 °C (température ambiante plus échauffement du conducteur).
Aeronavtika - Električni, ognjevzdržni kabli - Tehnična specifikacija
Ta evropski standard določa potrebne značilnosti in preskusne postopke za ognjevzdržne ali negorljive električne kable za uporabo v električnih sistemih letal. Kadar so izpostavljeni plamenu temperature 1100 °C, naj bi ti kabli po 5 minutah (ognjevzdržni) ali 15 minutah (negorljivi) izpostavljenosti ohranili tudi določeno površinsko odpornost. Ocenili naj bi se pri napetosti izmeničnega toka 600 V r.m.s., največji frekvenci 2000 Hz in dolgoročni temperaturi do 260 °C (sobna temperatura plus zvišanje temperature v prevodniku).
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 2234:2012
01-september-2012
$HURQDYWLND(OHNWULþQLRJQMHY]GUåQLNDEOL7HKQLþQDVSHFLILNDFLMD
Aerospace series - Cable, electrical, fire resistant - Technical specification
Luft- und Raumfahrt - Elektrische Leitungen, feuerbeständig - Technische
Lieferbedingungen
Série aérospatiale - Câbles électriques résistant au feu - Spécification technique
Ta slovenski standard je istoveten z: EN 2234:2012
ICS:
49.060 /HWDOVNDLQYHVROMVND Aerospace electric
HOHNWULþQDRSUHPDLQVLVWHPL equipment and systems
SIST EN 2234:2012 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 2234:2012
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SIST EN 2234:2012
EUROPEAN STANDARD
EN 2234
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2012
ICS 49.060
English Version
Aerospace series - Cable, electrical, fire resistant - Technical
specification
Série aérospatiale - Câbles électriques résistant au feu - Luft- und Raumfahrt - Elektrische Leitungen,
Spécification technique feuerbeständig - Technische Lieferbedingungen
This European Standard was approved by CEN on 23 December 2011.
CEN 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 CEN 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 CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same
status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2012 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 2234:2012: E
worldwide for CEN national Members.
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SIST EN 2234:2012
EN 2234:2012 (E)
Contents Page
Forword .3
1 Scope .4
2 Normative references .4
3 Terms, Definitions and Symbols .4
4 Materials and construction .4
4.1 Conductors .4
4.2 Construction .5
5 Required characteristics .5
6 Tests method .5
7 Quality assurance .9
7.1 Qualification .9
7.2 Acceptance tests . 10
8 Identification marking . 11
9 Packaging, labelling, and delivery lengths . 11
9.1 Packaging and labelling . 11
9.2 Delivery lengths . 11
2
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SIST EN 2234:2012
EN 2234:2012 (E)
Forword
This document (EN 2234:2012) has been prepared by the Aerospace and Defence Industries Association of
Europe - Standardization (ASD STAN).
After enquiries and votes carried out in accordance with the rules of this Association, this Standard has
received the approval of the National Associations and the Official Services of the member countries of ASD,
prior to its presentation to CEN.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by September 2012, and conflicting national standards shall be
withdrawn at the latest by September 2012.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland, Turkey and the United Kingdom.
3
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SIST EN 2234:2012
EN 2234:2012 (E)
1 Scope
This European Standard specifies the required characteristics and test procedures for fire resistant or fire-
proof electrical cables for use in aircraft electrical systems. These cables should also maintain a specific
surface resistance when they are subjected to a flame of 1 100 °C after 5 minutes (fire resistant) or 15
minutes (fire-proof) exposure.
They should be rated at an a.c. voltage of 600 V r.m.s., a frequency of maximum 2 000 Hz and a long term
temperature of up to 260 °C (ambient temperature plus temperature rise in conductor).
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 3475-100, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 100: General
EN 3838, Aerospace series — Requirements and tests on user-applied markings on aircraft electrical cables
EN 9133, Aerospace series — Quality management systems — Qualification procedure for aerospace
standard parts
ISO 2574, Aircraft — Electrical cables — Identification marking
ISO 8815, Aircraft — Electrical cables and cable harnesses — Vocabulary
IEC 60028:1925, International standard of resistance for copper
3 Terms, Definitions and Symbols
For the purposes of this document, the terms, definitions and symbols given in ISO 8815 and EN 3475-100
apply.
4 Materials and construction
4.1 Conductors
4.1.1 Materials
The individual strands used for the conductors shall be cylindrical and shall be:
2
of nickel clad copper alloy for nominal cross section of 0,4 mm ;
2
of nickel clad copper for nominal sections ≥ 0,6 mm .
The copper shall meet the requirements of IEC 60028 and the copper alloy the requirements of this European
Standard.
The nickel shall not represent less than 27 % of the total mass of the individual strand.
Individual strands shall show the following minimum breaking strength:
2
280 N/mm for nickel clad copper;
2
315 N/mm for nickel clad copper alloy.
4
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SIST EN 2234:2012
EN 2234:2012 (E)
4.1.2 Lay length
2
Up to 9 mm cross section inclusive (code 090), concentric or unilay conductors are used. The lay for the
stranded conductor, checked over the outside layer of a test piece 1 m long, shall be between 8 times and 16
times the maximum diameter of this conductor.
2 2
For sectional areas between 14 mm and 68 mm (codes 140 to 680), the conductor comprises concentric or
bunched conductors twisted together. The lay of the strands for the basic concentric or bunched conductors
shall not exceed 30 times the diameter of the concentric or bunched conductor in question.
The lay for concentric (or bunched) conductors, measured over the outer layer of the conductor, shall be
between 8 times and 16 times the maximum conductor diameter.
In all cases the lay of the outer layer shall be left-hand.
4.1.3 Joints
The conductors shall be free from any joints. Each strand comprising the conductors may, however, include
soldered or brazed joints. For strands with a diameter of 0,25 mm or greater, butt joints shall be used.
The distance between two joints in individual strands shall exceed 3 m, measured between different strands.
4.1.4 Compaction
Compaction of the causing deformation of the strands or damage to the plating is not permitted.
4.2 Construction
Finished cables
The insulation shall be of a material, which takes on the circular shape of the conductor throughout its length.
It shall closely cover the conductor without adhering to it, so that it reduces the corona effect and the risk of
blistering and heat corros
...
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