EN 3745-405:2012
(Main)Aerospace series - Fibres and cables, optical, aircraft use - Test methods - Part 405: Low/High temperature bend test
Aerospace series - Fibres and cables, optical, aircraft use - Test methods - Part 405: Low/High temperature bend test
This standard specifies a method of determining the attenuation variation of an optical cable during
mechanical bending under load at the maximum and minimum operating temperatures.
Luft- und Raumfahrt - Faseroptische Leitungen für Luftfahrzeuge - Prüfverfahren - Teil 405: Biegeprüfung bei niedriger/hoher Temperatur
Diese Europäische Norm legt ein Verfahren zur Bestimmung der Dämpfungsänderung in einer optischen Leitung bei mechanischer Biegung unter Krafteinwirkung sowie bei Höchst- und Mindestbetriebstemperatur fest.
Série aérospatiale - Fibres et câbles optiques à usage aéronautique - Méthodes d'essais - Partie 405: Essai de courbure aux températures basse/haute
La présente Norme Européenne spécifie une méthode pour déterminer la variation d’atténuation d’un câble optique durant une courbure mécanique sous charge aux températures minimales et maximales d’utilisation.
Aeronavtika - Optična vlakna in kabli za uporabo v zračnih plovilih - Preskusne metode - 405. del: Upogibni preskus pri nizkih/visokih temperaturah
Ta evropski standard določa metodo za ugotavljanje sprememb v slabljenju optičnega kabla med mehanskim upogibanjem pod obtežbo pri najvišji in najnižji obratovalni temperaturi.
General Information
- Status
- Published
- Publication Date
- 17-Jul-2012
- Withdrawal Date
- 30-Jan-2013
- Technical Committee
- ASD-STAN - Aerospace
- Drafting Committee
- ASD-STAN/D 2 - Electrical
- Current Stage
- 9093 - Decision to confirm - Review Enquiry
- Start Date
- 30-Jun-2017
- Completion Date
- 28-Jan-2026
Relations
- 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
- 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 3745-405:2012 - Aerospace series: Fibres and cables, optical, aircraft use - Test methods - Part 405: Low/High temperature bend test - specifies a laboratory method to determine the attenuation variation of optical fibres and cables when mechanically bent under load at the maximum and minimum operating temperatures. The procedure defines specimen preparation, required apparatus, conditioning, mandrel-winding steps and acceptance criteria to assess cable performance under extreme temperature bending conditions.
Key topics and requirements
- Scope: Measures change in optical attenuation caused by bending under load at low and high operating temperatures.
- Specimen preparation: Stabilize specimens at standard conditions for 24 h (per EN 3745-100). Details to be specified include number and length of specimens, upper/lower test temperatures, mandrel diameter and number of wraps, permissible attenuation variation, applied loads and wavelengths to measure.
- Apparatus: Requires a Light Launch System (LLS) and Light Detection System (LDS) (EN 2591-100), a rotating mandrel test fixture with weights, and an environmental chamber capable of maintaining test temperatures to ±2 °C.
- Test method (high-level):
- Connect specimen to LLS/LDS and record initial attenuation at specified wavelengths.
- Condition at low temperature for 4 hours, measure attenuation, then wind two turns on the mandrel at a steady rate (2 turns/min) and measure while wrapped.
- Unwind, re-measure and allow specimen to return to room temperature.
- Repeat conditioning and measurements at the high temperature.
- Acceptance: The difference in attenuation before and after mandrel winding at both temperatures shall be less than the limit specified in the applicable product standard. Perform visual inspection per EN 3745-201.
Applications
- Qualification and environmental validation of aerospace optical fibres and cables for aircraft systems (avionics, flight control, sensors, data buses).
- Production and acceptance testing by manufacturers to demonstrate compliance with aerospace performance requirements.
- Design verification during R&D to optimize cable construction for low/high temperature bend resilience.
- Failure analysis and troubleshooting where temperature-dependent bend loss is suspected.
Who uses this standard
- Aerospace cable and fibre manufacturers
- Independent test laboratories and certification bodies
- Avionics and aircraft systems engineers
- Quality assurance and procurement teams specifying acceptance criteria
Related standards
- EN 2591-100 - Light Launch/Detection Systems (LLS/LDS) - General
- EN 3745-100 - Fibres and cables, optical - Test methods - General
- EN 3745-201 - Visual examination
- EN 3745-301 - Attenuation
Keywords: EN 3745-405:2012, aerospace optical cable test, low/high temperature bend test, mandrel bend test, attenuation variation, LLS, LDS, environmental chamber.
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Frequently Asked Questions
EN 3745-405:2012 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 405: Low/High temperature bend test". This standard covers: This standard specifies a method of determining the attenuation variation of an optical cable during mechanical bending under load at the maximum and minimum operating temperatures.
This standard specifies a method of determining the attenuation variation of an optical cable during mechanical bending under load at the maximum and minimum operating temperatures.
EN 3745-405:2012 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 3745-405:2012 has the following relationships with other standards: It is inter standard links to EN 3745-301:2012, EN 3745-201:2002, EN 3745-100:2008, EN 2591-100:2024, EN 4641-202:2018, EN 4641-200:2018, EN 4641-101:2015, EN 4641-401:2024, EN 4641-106:2018, EN 4641-301:2011, EN 4641-100:2015, EN 4641-201:2018, EN 4641-102:2009, EN 4641-102:2025, FprEN 3745. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 3745-405:2012 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.DKLuft- und Raumfahrt - Faseroptische Leitungen für Luftfahrzeuge - Prüfverfahren - Teil 405: Biegeprüfung bei niedriger/hoher TemperaturSérie aérospatiale - Fibres et câbles optiques à usage aéronautique - Méthodes d'essais - Partie 405: Essai de courbure aux températures basse/hauteAerospace series - Fibres and cables, optical, aircraft use - Test methods - Part 405: Low/High temperature bend test49.060Aerospace electric equipment and systemsICS:Ta slovenski standard je istoveten z:EN 3745-405:2012SIST EN 3745-405:2012en,de01-oktober-2012SIST EN 3745-405:2012SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 3745-405
July 2012 ICS 49.090 English Version
Aerospace series - Fibres and cables, optical, aircraft use - Test methods - Part 405: Low/High temperature bend test
Série aérospatiale - Fibres et câbles optiques à usage aéronautique - Méthodes d'essais - Partie 405: Essai de courbure aux températures basse/haute
Luft- und Raumfahrt - Faseroptische Leitungen für Luftfahrzeuge - Prüfverfahren - Teil 405: Biegeprüfung bei niedriger/hoher Temperatur This European Standard was approved by CEN on 23 March 2012.
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
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 3745-405:2012: ESIST EN 3745-405:2012
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