SIST EN 3475-801:2004

Aerospace series - Cables, electrical, aircraft use - Test methods - Part 801: Capacitance per unit length

This standard specifies a method for measuring the capacitance per unit length of a cable.
It shall be used together with EN 3475-100.

Luft- und Raumfahrt - Elektrische Leitungen für Luftfahrtverwendung - Prüfverfahren - Teil 801: Betriebskapazität

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

Série aérospatiale - Câbles électriques a usage aéronautique - Méthodes d'essais - Partie 801: Capacité linéique

Aerospace series - Cables, electrical, aircraft use - Test methods - Part 801: Capacitance per unit length

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 3475-801:2002 - Aerospace series - Cables, electrical, aircraft use - Test methods - Part 801: Capacitance per unit length

Overview

EN 3475-801:2002 - "Aerospace series - Cables, electrical, aircraft use - Test methods - Part 801: Capacitance per unit length" is a CEN/AECMA test-method standard that specifies how to measure the capacitance per unit length of aircraft electrical cables. The standard is intended to be used together with EN 3475-100 (general test-method requirements) and defines sample preparation, test frequency, accuracy, measurement configurations and reporting units for reliable cable capacitance data.

Key topics and technical requirements

• Scope: Method for measuring capacitance per unit length of aerospace electrical cables; applies to coaxial, unscreened pair, screened pair and multipair constructions.
• Sample preparation: Specimens must be stripped and prepared so that measurements can be taken between the specified points.
• Sample length: Tests are performed on samples of one metre or more.
• Test frequency and accuracy: Measurements are made at a frequency between 800 Hz and 1 000 Hz, with an accuracy of ±1%.
• Measurement configurations:
  • Coaxial structure: Capacitance measured between inner and outer conductors.
  • Unscreened pair: Capacitance measured between the two conductors.
  • Screened pair: Three capacitances - Ca, Cb and Cc - are measured (between elements with various screening connections). The standard provides a formula to calculate the effective capacitance per unit length from these measured values; results are expressed in picofarads per metre (pF/m).
  • Multipair cables: If pairs are individually screened, measure each pair as a coaxial-like structure; if not, use the screened-pair method while connecting all other conductors to screening.
• Requirement: The measured effective capacitance per unit length must lie within the limits specified in the applicable product standard.

Applications and who uses it

• Aerospace cable manufacturers for design verification and production quality control.
• Test laboratories performing acceptance and type testing of aircraft wiring.
• Avionics and electrical system engineers validating cable performance for signal integrity and EMI considerations.
• Procurement and certification teams requiring standardized, traceable capacitance data for compliance with aerospace product standards.
• Maintenance organizations performing in-service cable characterization.

Related standards

• EN 3475-100 - Aerospace series – Cables, electrical, aircraft use – Test methods – Part 100: General (normative reference for specimen preparation and general test conditions).

Keywords: EN 3475-801:2002, capacitance per unit length, aerospace cables, test methods, cable capacitance measurement, aircraft electrical cables, screened pair, coaxial, multipair cable.

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 801: Capacitance per unit lengthLuft- und Raumfahrt - Elektrische Leitungen für Luftfahrtverwendung - Prüfverfahren - Teil 801: BetriebskapazitätSérie aérospatiale - Câbles électriques a usage aéronautique - Méthodes d'essais - Partie 801: Capacité linéiqueAerospace series - Cables, electrical, aircraft use - Test methods - Part 801: Capacitance per unit length49.060Aerospace electric equipment and systemsICS:Ta slovenski standard je istoveten z:EN 3475-801:2002SIST EN 3475-801:2004en01-maj-2004SIST EN 3475-801:2004SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 3475-801June 2002ICS 49.060English versionAerospace series - Cables, electrical, aircraft use - Testmethods - Part 801: Capacitance per unit lengthSérie aérospatiale - Câbles électriques à usageaéronautique - Méthodes d'essais - Partie 801: CapacitélinéiqueLuft- und Raumfahrt - Elektrischen Leitungen für LuftfahrtVerwendung - Prüfverfahren - Teil 801: BetriebskapazitätThis European Standard was approved by CEN on 20 January 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 3475-801:2002 ESIST EN 3475-801:2004
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