EN 3745-410:2015
(Main)Aerospace series - Fibres and cables, optical, aircraft use - Test methods - Part 410: Thermal life
Aerospace series - Fibres and cables, optical, aircraft use - Test methods - Part 410: Thermal life
This European Standard specifies a method of measuring the thermal endurance of a finished optical cable. There are two test methods incorporated which estimate the cables thermal life with or without the cable.
- Method A - without mechanical stress (temperature only),
- Method B - combined temperature and mechanical stress.
Luft- und Raumfahrt - Faseroptische Leitungen für Luftfahrezuge - Prüfverfahren - Teil 410: Lebensdauer unter Temperatureinwirkung
Série aérospatiale - Fibre et câbles optiques à usage aéronautique - Méthodes d'essais - Partie 410 : Durée de vie en température
Aeronavtika - Optična vlakna in kabli za uporabo v zračnih plovilih - Preskusne metode - 410. del: Življenjska doba pod temperaturnim vplivom
Ta evropski standard določa metodo za merjenje toplotne vzdržljivosti končanega optičnega kabla. Dve preskusni metodi sta uporabljeni za oceno življenjske dobe toplotne vzdržljivosti kabla s kablom ali brez njega.
– Metoda A: brez mehanskih obremenitev (samo temperatura).
– Metoda B: združene toplotne in mehanske obremenitve.
General Information
- Status
- Published
- Publication Date
- 21-Jul-2015
- Withdrawal Date
- 30-Jan-2016
- Technical Committee
- ASD-STAN - Aerospace
- Drafting Committee
- ASD-STAN/D 2 - Electrical
- Current Stage
- 6060 - Definitive text made available (DAV) - Publishing
- Start Date
- 22-Jul-2015
- Completion Date
- 22-Jul-2015
Relations
- Effective Date
- 29-Jul-2015
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 15-Oct-2025
Overview
EN 3745-410:2015 is a European Standard developed by CEN that defines test methods for assessing the thermal endurance of finished optical cables specifically designed for aerospace and aircraft use. This standard is part of the aerospace series related to optical fibres and cables, and it provides critical guidelines and procedures to estimate the thermal life of such cables under controlled laboratory conditions.
The document outlines two primary test methods to evaluate the thermal life of optical cables:
- Method A: thermal life testing without mechanical stress, focusing solely on temperature effects.
- Method B: thermal life testing under combined thermal and mechanical stresses.
This standard is essential for manufacturers, testing laboratories, and aerospace quality assurance teams to ensure the reliability and longevity of optical cables used in demanding aeronautical environments.
Key Topics
Scope and Purpose
- Measures thermal endurance of finished optical cables used in aircraft.
- Includes two test variants simulating operation conditions with or without mechanical stress.
Test Specimens
- Preparation of fibre ends as per EN 2591-100.
- Conditioning at standard test conditions before testing.
Method A: Thermal Life without Mechanical Stress
- Specimens fixed on aircraft-representative apparatus.
- Exposure to multiple temperature levels with attenuation monitoring.
- Failure defined by exceeding allowable attenuation variation.
- Life calculation using log average life methods according to ASTM-D3032.
- Test temperatures selection guidelines to avoid overexposure or inaccurate extrapolation.
Method B: Thermal Life with Mechanical Stress
- Test specimens fixed using padded plates to reduce fibre stress variations.
- Cable bent at minimum bend radius with cyclic mechanical stress applied.
- Attenuation measured after each thermal/mechanical cycle.
- Failure criteria include excessive attenuation or physical jacket degradation (cracking/splitting).
- Regression line calculation for life expectancy estimation using least squares methods on log-life versus inverse absolute temperature plots.
- Detailed apparatus requirements including Light Launch System (LLS), Light Detection System (LDS), climatic chamber, and specialized test fixtures.
Calculation and Extrapolation
- Use of logarithmic regression to model insulation life as a function of temperature.
- Careful extrapolation to predict lifespan at lower temperatures.
- Defined limits for temperature extrapolation to maintain test accuracy.
Applications
EN 3745-410:2015 is applicable in various aerospace contexts where optical fibres and cables are integral components, including:
Aircraft Wiring Systems
- Ensuring optical fibres and cables maintain performance and durability under thermal stresses experienced during flight.
Avionics and Communication Networks
- Validating the longevity of optical cables used in data transmission critical to avionics functionality.
Aerospace Manufacturing and Quality Control
- Providing standardized test protocols for manufacturers to qualify optical cables.
- Enabling aerospace OEMs to specify reliable cable products with verified thermal life data.
Research and Development
- Supporting material and design innovations by offering repeatable, standardized tests for cable thermal endurance.
- Assisting in comparing performance of new fibre optic cable materials under realistic combined thermal and mechanical stresses.
Related Standards
This standard references and complements several other aerospace and optical testing standards:
- EN 2591-100: Aerospace series - Elements of electrical and optical connections - General test methods.
- EN 3745-100: Aerospace series - Fibres and cables, optical, aircraft use - General test methods.
- EN 3745-301: Aerospace series - Optical fibres and cables - Test methods for attenuation measurement.
- ASTM D3032: Standard test methods for hookup wire insulation - Provides statistical methods for life calculation used in this standard.
By aligning with these related standards, EN 3745-410:2015 ensures comprehensive testing methodologies and consistency across the aerospace fibre optic cable qualification processes.
Keywords: aerospace optical cables, thermal life testing, optical fibre cables aircraft, EN 3745-410, thermal endurance, mechanical stress testing, aerospace standards optical fibres, fibre optic cable ageing, cable attenuation measurement, aviation cable testing.
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Frequently Asked Questions
EN 3745-410:2015 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Fibres and cables, optical, aircraft use - Test methods - Part 410: Thermal life". This standard covers: This European Standard specifies a method of measuring the thermal endurance of a finished optical cable. There are two test methods incorporated which estimate the cables thermal life with or without the cable. - Method A - without mechanical stress (temperature only), - Method B - combined temperature and mechanical stress.
This European Standard specifies a method of measuring the thermal endurance of a finished optical cable. There are two test methods incorporated which estimate the cables thermal life with or without the cable. - Method A - without mechanical stress (temperature only), - Method B - combined temperature and mechanical stress.
EN 3745-410:2015 is classified under the following ICS (International Classification for Standards) categories: 49.090 - On-board equipment and instruments. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 3745-410:2015 has the following relationships with other standards: It is inter standard links to EN 3745-410:2007, EN 2591-100:2024, EN 3745-301:2012, EN 4641-102:2025, EN ISO 20257-1:2020, EN 4641-102:2009, EN 4641-401:2024, CEN ISO/TS 27469:2011, EN 4641-301:2011, FprEN 3745. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 3745-410:2015 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Luft- und Raumfahrt - Faseroptische Leitungen für Luftfahrezuge - Prüfverfahren - Teil 410: Lebensdauer unter TemperatureinwirkungSérie aérospatiale - Fibre et câbles optiques à usage aéronautique - Méthodes d'essais - Partie 410 : Durée de vie en températureAerospace series - Fibres and cables, optical, aircraft use - Test methods - Part 410: Thermal life49.060Aerospace electric equipment and systems33.180.10Fibres and cablesICS:Ta slovenski standard je istoveten z:EN 3745-410:2015SIST EN 3745-410:2015en,fr,de01-oktober-2015SIST EN 3745-410:2015SLOVENSKI
STANDARDSIST EN 3745-410:20071DGRPHãþD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 3745-410
July 2015 ICS 49.090 Supersedes EN 3745-410:2007English Version
Aerospace series - Fibres and cables, optical, aircraft use - Test methods - Part 410: Thermal life
Série aérospatiale - Fibre et câbles optiques à usage aéronautique - Méthodes d'essais - Partie 410 : Durée de vie en température
Luft- und Raumfahrt - Faseroptische Leitungen für Luftfahrezuge - Prüfverfahren - Teil 410: Lebensdauer unter Temperatureinwirkung This European Standard was approved by CEN on 14 February 2015.
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, 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 © 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 3745-410:2015 ESIST EN 3745-410:2015
Page Foreword .3 1 Scope .4 2 Normative references .4 3 Test specimens .4 3.1 Fibre ends .4 4 Method A (without mechanical stress applied) .4 4.1 Preparation of test specimens .4 4.2 Test conditions .5 4.3 Apparatus .5 4.4 Procedure .5 4.4.1 Initial measurements .5 4.4.2 Test .5 4.4.3 Final measurements and requirement .6 4.4.4 Special precautions .6 5 Method B (with mechanical stress applied) .6 5.1 Preparation of test specimens .6 5.2 Test conditions .6 5.3 Information to be included in the product standard .6 5.4 Apparatus .7 5.5 Procedure .8 5.5.1 Initial measurements .8 5.5.2 Test .8 5.5.3 Calculation of the regression line .9 5.5.4 Special precautions . 10 6 Requirements . 10
Method A – without mechanical stress (temperature only), Method B – combined temperature and mechanical stress. 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 2591-100, Aerospace series — Elements of electrical and optical connection — Test methods — Part 100: General EN 3745-100, Aerospace series — Fibres and cables, optical, aircraft use — Test methods — Part 100: General EN 3745-301, Aerospace series — Fibres and cables, optical, aircraft use — Test methods — Part 301: Attenuation ASTM-D3032, Standard test methods for hookup wire insulation 1) 3 Test specimens 3.1 Fibre ends The fibre ends shall be prepared in accordance with EN 2591-100. If not yet at standard test conditions, the specimens shall be subjected to standard test conditions and stabilized at these conditions for 24 h as defined in EN 3745-100. 4 Method A (without mechanical stress applied) 4.1 Preparation of test specimens Specimens have to be fixed on an apparatus representative of aircraft installation. Ten specimens are fixed on apparatus and constitute a set for life testing at each temperature. A minimum of four sets of specimens is necessary.
1) Published by: ASTM National (US) American Society for Testing and Materials (http://www.astm.org/). SIST EN 3745-410:2015
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