SIST EN 3475-807:2004

Aerospace series - Cables, electrical, aircraft use - Test methods - Part 807: Transfer impedance

This standard specifies methods for measuring the transfer impedance of a cable.
It shall be used together with EN 3475-100.

Luft- und Raumfahrt - Elektrische Leitungen für Luftfahrtverwendung - Prüfverfahren - Teil 807: Kupplungswiderstand

Diese Norm legt ein Verfahren zum Messen des Kupplungswiderstandes einer Leitung fest.
Sie ist in Verbindung mit EN 3475-100 anzuwenden.

Série aérospatiale - Câbles électriques a usage aéronautique - Méthodes d'essais - Partie 807: Impédance de transfert

Aerospace series - Cables, electrical, aircraft use - Test methods - Part 807: Transfer impedance

General Information

• Status: Published
• Publication Date: 30-Apr-2004
• ICS: 49.060 - Aerospace electric equipment and systems
• Technical Committee: I08 - Imaginarni 08
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-May-2004
• Due Date: 01-May-2004
• Completion Date: 01-May-2004
• Ref Project: EN 3475-807:2002 - Aerospace series - Cables, electrical, aircraft use - Test methods - Part 807: Transfer impedance

Relations

• Revises: kSIST FprEN 3475-807:2025 - Aerospace series - Cables, electrical, aircraft use - Test methods - Part 807: Transfer impedance
• Effective Date: 19-Jan-2023

Overview

EN 3475-807:2002 - "Aerospace series - Cables, electrical, aircraft use - Test methods - Part 807: Transfer impedance" is a CEN/AECMA standard that specifies accepted laboratory methods for measuring the transfer impedance of aircraft electrical cables. Transfer impedance quantifies how well a cable screening (shield) prevents external electromagnetic currents from coupling into the conductors - a key property for aircraft EMC and signal integrity.

This standard is intended to be used together with EN 3475-100 (general test-method requirements) and was prepared under AECMA procedures and adopted as a European Standard.

Key topics and requirements

• Scope and purpose: Defines measurement procedures to determine the transfer impedance (ZT) of cable screening under controlled test conditions.
• Specimen preparation: Test specimens must be stripped and prepared for connection to measuring equipment. For multicore cables, conductors are connected together at both ends; for multiscreened cables, screens are tied together at both ends.
• Method A - cable leakage method:
  • Simple technique suitable for lower transfer impedance measurements (document cites validity up to around 10^-5 W/m and to 10 MHz).
  • Typical setup uses ~1 m of cable placed inside a sealed copper enclosure (dimensions shown in the standard, example 500 mm × 660 mm) with specific lead-throughs for the signal generator and detector.
  • Cable is driven via its characteristic impedance Zo; detector measures induced voltage to compute transfer impedance.
• Method B - susceptible cable method:
  • Uses a variable-frequency power generator and a field-intensity (selective) voltmeter.
  • Conductors inside the screening are shorted at both ends; external interference current is measured (clamp-on tester or derived from generator output and series resistor). The interference voltage between conductor and screening is measured to determine ZT.
• Pass/fail requirement: Measured ZT values shall be below the limits specified in the applicable product standard for the cable.

Applications and users

• Ensures cable screening performance for aircraft electrical systems where EMC and low signal coupling are critical.
• Typical users:
  • Aerospace cable manufacturers (qualification and production control)
  • EMC and environmental test laboratories
  • Aircraft systems engineers and integrators verifying cable performance to product standards
  • Certification authorities assessing compliance with aerospace wiring specifications

Related standards

• EN 3475-100 (Aerospace cables - Test methods - Part 100: General) - normative reference and required companion document.
• Product-specific EN/industry standards that define allowable ZT limits for particular cable types.

Keywords: EN 3475-807:2002, transfer impedance, aerospace cables test methods, aircraft electrical cables, cable screening, EMC testing, cable leakage method, susceptible cable method.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aerospace series - Cables, electrical, aircraft use - Test methods - Part 807: Transfer impedanceLuft- und Raumfahrt - Elektrische Leitungen für Luftfahrtverwendung - Prüfverfahren - Teil 807: KupplungswiderstandSérie aérospatiale - Câbles électriques a usage aéronautique - Méthodes d'essais - Partie 807: Impédance de transfertAerospace series - Cables, electrical, aircraft use - Test methods - Part 807: Transfer impedance49.060Aerospace electric equipment and systemsICS:Ta slovenski standard je istoveten z:EN 3475-807:2002SIST EN 3475-807:2004en01-maj-2004SIST EN 3475-807:2004SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 3475-807June 2002ICS 49.060English versionAerospace series - Cables, electrical, aircraft use - Testmethods - Part 807: Transfer impedanceSérie aérospatiale - Câbles électriques à usageaéronautique - Méthodes d'essais - Partie 807: Impédancede transfertLuft- und Raumfahrt - Elektrischen Leitungen für LuftfahrtVerwendung - Prüfverfahren - Teil 807:KupplungswiderstandThis European Standard was approved by CEN on 1 March 2002.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the 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 translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2002 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 3475-807:2002 ESIST EN 3475-807:2004
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