SIST EN 4604-009:2017

Aerospace series - Cable, electrical, for signal transmission - Part 009: Cable, coaxial, light weight, 50 ohms, 180 °C, type KW (light WN) - Product standard

This European Standard specifies the required characteristics of a light weight coaxial cable, 50 , type KW for use in aircraft electrical systems at operating temperature between -55 °C and 180 °C and specially for high frequency up to 6 GHz. Nevertheless, if needed, -65 °C is also acceptable as shown by rapid change of temperature test.

Luft- und Raumfahrt - Elektrische Leitungen für Signalübertragungen - Teil 009: Koaxialkabel, Leichtbauweise, 50 Ohm, 180 °C, Typ KW (WN Leichtbauweise) - Produktnorm

Série aérospatiale - Câbles électriques pour transmission de signaux - Partie 009 : Câble, coaxial, allégé 50 ohms, 180 °C, type KW (WN allégé) - Norme de produit

Aeronavtika - Kabli, električni, za prenos signala - 009. del: Kabli, koaksialni, lahki, 50 ohmov, 180 °C, tip KW (lahki WN) - Standard za proizvod

Ta evropski standard določa zahtevane značilnosti lahkega koaksialnega kabla, 50 , tipa KW za uporabo v letalskih električnih sistemih pri delovni temperaturi med –55 °C in 180 °C ter posebej za visoko frekvenco do 6 GHz. Kljub temu je po potrebi sprejemljiva tudi temperatura –65 °C, kot prikazuje preskus s hitro spremembo temperature.

General Information

• Status: Published
• Publication Date: 19-Mar-2017
• ICS: 33.120.10 - Coaxial cables. Waveguides
• ICS: 49.060 - Aerospace electric equipment and systems
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 16-Mar-2017
• Due Date: 21-May-2017
• Completion Date: 20-Mar-2017
• Ref Project: EN 4604-009:2017 - Aerospace series - Cable, electrical, for signal transmission - Part 009: Cable, coaxial, light weight, 50 ohms, 180 °C, type KW (light WN) - Product standard

Relations

• Replaces: SIST EN 4604-009:2014 - Aerospace series - Cable, electrical, for signal transmission - Part 009: Cable, coaxial, light weight, 50 ohms, 180 °C, type KW (light WN) - Product standard
• Effective Date: 15-Mar-2017
• Revised: kSIST FprEN 4604-009:2025 - Aerospace series - Cable, electrical, for signal transmission - Part 009 : Cable, coaxial, light weight, 50 ohms, 180 °C, type KW (light WN) - Product standard
• Effective Date: 05-Apr-2023
• Revised: SIST EN 4604-009:2014 - Aerospace series - Cable, electrical, for signal transmission - Part 009: Cable, coaxial, light weight, 50 ohms, 180 °C, type KW (light WN) - Product standard
• Effective Date: 24-Jun-2015

Overview

SIST EN 4604-009:2017 is a European Standard developed by CEN for aerospace electrical cables, specifically detailing the requirements for a lightweight 50 ohms coaxial cable (Type KW). Designed for robust performance in aircraft electrical systems, this cable operates efficiently in extreme temperatures ranging from -55 °C to 180 °C, with a tested tolerance down to -65 °C. It supports high-frequency signal transmission up to 6 GHz, making it an essential component for aerospace applications requiring reliable, high-frequency electrical signal performance.

This standard replaces the earlier EN 4604-009:2014 and includes comprehensive specifications for materials, construction, electrical and mechanical performance, and testing protocols. It ensures cables meet stringent aerospace requirements for safety, durability, and electromagnetic compatibility.

Key Topics

• Material and Construction

  • Single-strand conductor made of copper clad aluminium, silver plated for optimal conductivity.
  • Dielectric: fluorocarbon with low dielectric constant (low epsilon) to reduce signal loss.
  • Shield: combination of silver-plated copper or copper alloy and copper clad aluminium braid for effective electromagnetic interference protection.
  • Outer jacket of fluorocarbon material colored turquoise, ensuring chemical and thermal resistance.

• Electrical Characteristics

  • Characteristic impedance: 50 ± 3 Ω at 200 MHz.
  • Capacitance per unit length: maximum 88 pF/m.
  • Transfer impedance up to 400 MHz: maximum 20 mΩ/m.
  • Designed for operation at voltages up to 1000 V r.m.s.
  • Power handling capabilities vary with frequency (up to 8,000 W at 50 MHz).
  • Attenuation values and velocity of propagation (≥ 243,000 km/s) ensure minimal signal loss.

• Mechanical and Environmental Performance

  • Operating temperature range from -55 °C to 180 °C, with tests validating operation down to -65 °C.
  • Minimum bend radii defined for static (80 mm) and dynamic use (120 mm).
  • Resistant to thermal shock, humidity, abrasion, and fluids per defined test protocols.

• Testing and Quality Assurance

  • Extensive tests covering electrical properties, mechanical durability, thermal endurance, flammability, resistance to fluids, and rapid temperature changes.
  • Compliance with aerospace industry test methods specified in EN 3475 series.
  • Includes checks for plating adherence, tensile strength, insulation resistance, and return loss performance.

• Marking, Packaging, and Identification

  • Cables must be properly marked with black or green ink, or suitable color on protective tape for clear identification.
  • Delivered on industrial cable drums approximately 175 meters long, with a minimum piece length of 50 meters.
  • Color coding and marking requirements ensure proper traceability and compliance with aerospace standards.

Applications

SIST EN 4604-009:2017 cables are specifically engineered for use in aerospace electrical systems that demand:

• High-frequency signal transmission with minimal interference.
• Operation under harsh environmental conditions, including extreme temperatures and exposure to chemicals.
• Lightweight construction to reduce aircraft weight while maintaining electrical integrity.
• Use in avionics, communication systems, radar, and navigation equipment where signal clarity and reliability are critical.
• Environments requiring cables that withstand thermal endurance, mechanical stress, and maintain electrical performance over long service life.

This standardized cable type KW facilitates the design and maintenance of safe, efficient, and reliable aerospace electrical installations. By adhering to SIST EN 4604-009:2017, manufacturers and engineers ensure compatibility with other aerospace components and simplify certification processes.

Related Standards

Understanding and implementing SIST EN 4604-009:2017 benefits from familiarity with related aerospace standards:

• EN 3475-100: Aerospace electrical cables test methods, general requirements for verification.
• EN 4434: Product standard for copper or copper alloy lightweight conductors, relevant for conductor material specifications.
• EN 4604-001: Technical specifications for electrical signal transmission cables in aerospace.
• EN 4604-002: General product standard requirements for aerospace electrical cables.
• TR 6058: Cable code identification list for standardized marking and categorization.
• ASTM B566: Specification for copper clad aluminium wires, the core conductor material used in these cables.

Compliance with SIST EN 4604-009:2017 alongside these interconnected standards ensures aerospace coaxial cables meet comprehensive quality, safety, and performance benchmarks required in modern aviation and defense industries.

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Keywords: aerospace coaxial cable, lightweight cable, 50 ohms cable, high-frequency cable, aircraft electrical systems, EN 4604-009, cable standard, aerospace electrical cables, high temperature cable, signal transmission cable, aerospace wiring, cable testing standards.

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2017
1DGRPHãþD
SIST EN 4604-009:2014
$HURQDYWLND.DEOLHOHNWULþQL]DSUHQRVVLJQDODGHO.DEOLNRDNVLDOQLODKNL
RKPRYƒ&WLS.:ODKNL:16WDQGDUG]DSURL]YRG
Aerospace series - Cable, electrical, for signal transmission - Part 009: Cable, coaxial,
light weight, 50 ohms, 180 °C, type KW (light WN) - Product standard
Luft- und Raumfahrt - Elektrische Leitungen für Signalübertragungen - Teil 009:
Koaxialkabel, Leichtbauweise, 50 Ohm, 180 °C, Typ KW (WN Leichtbauweise) -
Produktnorm
Série aérospatiale - Câbles électriques pour transmission de signaux - Partie 009 :
Câble, coaxial, allégé 50 ohms, 180 °C, type KW (WN allégé) - Norme de produit
Ta slovenski standard je istoveten z: EN 4604-009:2017
ICS:
33.120.10 Koaksialni kabli. Valovodi Coaxial cables. Waveguides
49.060 /HWDOVNDLQYHVROMVND Aerospace electric
HOHNWULþQDRSUHPDLQVLVWHPL equipment and systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 4604-009
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2017
EUROPÄISCHE NORM
ICS 49.060 Supersedes EN 4604-009:2014
English Version
Aerospace series - Cable, electrical, for signal transmission
- Part 009: Cable, coaxial, light weight, 50 ohms, 180 °C,
type KW (light WN) - Product standard
Série aérospatiale - Câbles électriques pour Luft- und Raumfahrt - Elektrische Leitungen für
transmission de signaux - Partie 009 : Câble, coaxial, Signalübertragungen - Teil 009: Koaxialkabel,
allégé 50 ohms, 180 °C, type KW (WN allégé) - Norme Leichtbauweise, 50 Ohm, 180 °C, Typ KW (WN
de produit Leichtbauweise) - Produktnorm
This European Standard was approved by CEN on 24 September 2016.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 4604-009:2017 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Required characteristics . 4
5 Quality assurance . 11
6 Designation. 12
7 Identification and marking . 12
8 Colours of components and jacket . 12
9 Packaging, labelling and delivery lengths . 12
10 Technical specification . 12

European foreword
This document (EN 4604-009:2017) 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 2017, and conflicting national standards shall
be withdrawn at the latest by September 2017.
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.
This document supersedes EN 4604-009:2014.
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, Former Yugoslav Republic of Macedonia, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands,
Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
the United Kingdom.
1 Scope
This European Standard specifies the required characteristics of a light weight coaxial cable, 50 Ω,
type KW for use in aircraft electrical systems at operating temperature between −55 °C and 180 °C and
specially for high frequency up to 6 GHz. Nevertheless, if needed, −65 °C is also acceptable as shown by
rapid change of temperature test.
2 Normative references
The following referenced documents are indispensable for the application of this document. 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 (all parts), Aerospace series — Cables, electrical, aircraft use — Test methods — Part 100:
General
EN 4434, Aerospace series — Copper or copper alloy lightweight conductors for electrical cables — Product
standard (Normal and tight tolerances)
EN 4604-001, Aerospace series — Cable, electrical, for signal transmission — Part 001: Technical
specification
EN 4604-002, Aerospace series — Cable, electrical, for signal transmission — Part 002: General
1)
TR 6058, Aerospace series — Cable code identification list
2)
ASTM-B566, Standard specification for copper-clad aluminium wire
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 3475-100 and the following
apply.
3.1
Epsilon (ε)
value of dielectric constant
4 Required characteristics
4.1 Material, construct
...