EN IEC 60794-1-111:2023

Optical fibre cables - Part 1-111: Generic specification - Basic optical cable test procedures - Mechanical tests methods - Bend, method E11

IEC 60794-1-111: 2023 defines the test procedure to determine the ability of an optical fibre cable to withstand bending around a test mandrel. The primary purpose of this procedure is to measure the change in attenuation when the cable is bent around a test mandrel. A secondary purpose is to assess whether the cable has been physically damaged by bending. NOTE 1 This test can be utilized at any specified temperature, including the low or high temperature limits for the cable. NOTE 2 The bend test procedure for cable elements is specified in IEC 60794-1-301, method G1. This document partially cancels and replaces IEC 60794-1-21:2015. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to IEC 60794‑1‑21:2015: a) the nominal sample length was newly specified as 10 m between the cable element fixing points at both ends, unless otherwise specified; b) the number of turns on the mandrel in Figure 1 for the single-helix configuration were corrected to match the number of turns shown in the figure for the two-helix configuration; c) requirements on the turnaround loop were added for method E11A, two-helix configuration; d) the turnaround loop with the same diameter as the mandrel was taken into account for calculation of the number of turns of each helix for method E11A, two-helix configuration; e) added a formula for calculation of the number of revolutions in each helix for method E11A, two-helix configuration; f) added a description for the procedure when the turnaround loop diameter is larger than the mandrel diameter for method E11A, two-helix configuration; g) all the figures were updated and the different components labelled; h) added the attenuation monitoring equipment in 4.2 for the apparatus and the description to measure the change in attenuation in the test methods E11A and E11B; i) added Clause 9 for details to be reported; j) added Annex A showing an example of a special mandrel to perform the bend test according to method E11A, two-helix configuration; k) added Annex B providing the rationale for the options of method E11A, two-helix configuration.

Lichtwellenleiterkabel - Teil 1-111: Fachgrundspezifikation - Grundlegende Prüfverfahren für Lichtwellenleiterkabel - Mechanische Prüfverfahren - Biegen, Verfahren E11

Câbles à fibres optiques - Partie 1-111: Spécification générique - Procédures fondamentales d'essais des câbles optiques - Méthodes d'essai mécanique - Courbures, méthode E11

IEC 60794-1-111: 2023 définit la procédure d'essai en vue de déterminer la capacité d'un câble à fibres optiques à résister à la courbure autour d'un mandrin d'essai. L'objectif principal de cette procédure est de mesurer la variation de l’affaiblissement lorsque le câble est courbé autour d'un mandrin d'essai. L’objectif secondaire est d'évaluer si le câble a été physiquement endommagé par la courbure. NOTE 1 Cet essai peut être utilisé quelle que soit la température spécifiée, y compris aux limites de température inférieure ou supérieure pour le câble. NOTE 2 La procédure d'essai de courbure pour les éléments de câble est spécifiée dans l’IEC 60794-1-301, méthode G1. Ce document annule et remplace partiellement l’IEC 60794-1-21:2015. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l’IEC 60794‑1‑21:2015: a) nouvelle précision de la longueur nominale d'échantillon comme étant de 10 m entre les points de fixation de l'élément de câble aux deux extrémités, sauf indication contraire; b) correction du nombre de tours sur le mandrin à la Figure 1 pour la configuration à spire simple afin de correspondre au nombre de tours indiqué à la figure pour la configuration à deux spires; c) ajout d’exigences relatives à la boucle d'enroulement pour la méthode E11A, configuration à deux spires; d) prise en compte de la boucle d'enroulement du même diamètre que le mandrin pour le calcul du nombre de tours de chaque spire pour la méthode E11A, configuration à deux spires; e) ajout d'une formule pour le calcul du nombre de tours de chaque spire pour la méthode E11A, configuration à deux spires; f) ajout d'une description de la procédure à suivre lorsque le diamètre de la boucle d'enroulement est supérieur au diamètre du mandrin pour la méthode E11A, configuration à deux spires; g) mise à jour de toutes les figures et identification des différents composants; h) ajout de l'équipement de contrôle de l’affaiblissement en 4.2 dédié à l'appareillage et à la description pour la mesure de la variation de l’affaiblissement dans les méthodes d'essai E11A et E11B; i) ajout de l'Article 9 dédié aux informations détaillées à consigner; j) ajout d'une Annexe A qui présente un exemple de mandrin spécial en vue d’effectuer l'essai de courbure selon la méthode E11A, configuration à deux spires; k) ajout d'une Annexe B qui fournit la justification des options de la méthode E11A, configuration à deux spires.

Optični kabli - 1-111. del: Splošna specifikacija - Osnovni preskusni postopki za optične kable - Mehanske preskusne metode - Upogib, metoda E11 (IEC 60794-1-111:2023)

Standard IEC 60794-1-111: 2023 opisuje preskusni postopek za ugotavljanje zmožnosti optičnega vlakna ali kabla, da vzdrži upogibanje okoli preskusnega trna. Glavni namen tega postopka je izmeriti spremembo slabljenja pri upogibu kabla okoli preskusnega trna. Njegov namen je tudi oceniti, ali se je kabel pri upogibanju fizično poškodoval. OPOMBA 1: Ta preskus je mogoče izvesti pri kateri koli opredeljeni temperaturi, vključno z mejnimi vrednostmi nizke oziroma visoke temperature za kabel. OPOMBA 2: Postopek upogibnega preskusa za kabelske elemente je določen v standardu IEC 60794-1-301, metoda G1. Dokument delno razveljavlja in nadomešča standard IEC 60794-1-21:2015. Ta izdaja je tehnično popravljena izdaja. Ta izdaja v primerjavi s standardom IEC 60794-1-21:2015 vključuje naslednje pomembne tehnične spremembe:
a) nazivna dolžina vzorca je bila na novo določena, in sicer 10 m med točkama fiksiranja na obeh koncih kabelskega elementa, razen če je navedeno drugače;
b) število zasukov na trnu, prikazano na sliki 1 za enojno vijačnico, je bilo popravljeno tako, da ustreza številu zasukov, prikazanih na sliki za dvojno vijačnico;
c) dodane so bile zahteve glede povratne zanke za metodo E11A (dvojna vijačnica);
d) pri izračunu števila zasukov posamezne vijačnice za metodo E11A (dvojna vijačnica) je bila upoštevana povratna zanka s premerom, ki je enak premeru trna;
e) za metodo E11A (dvojna vijačnica) je bila dodana formula za izračun števila vrtljajev v posamezni vijačnici;
f) dodan je bil opis za postopek, kadar je pri metodi E11A (dvojna vijačnica) premer povratne zanke večji od premera trna;
g) vse slike so bile posodobljene in druge komponente so bile označene;
h) v točki 4.2 sta bila dodana oprema za merjenje slabljenja naprave ter opis merjenja spremembe slabljenja s preskusnima metodama E11A in E11B;
i) dodana je bila točka 9 za podrobnosti, o katerih je treba poročati;
j) dodan je bil dodatek A, ki prikazuje primer posebnega trna za izvedbo upogibnega preskusa v skladu z metodo E11A (dvojna vijačnica);
k) dodan je bil dodatek B, ki podaja utemeljitev možnosti metode E11A (dvojna vijačnica).

General Information

• Status: Published
• Publication Date: 26-Oct-2023
• ICS: 33.180.10 - Fibres and cables
• Technical Committee: CLC/TC 86A - Optical fibres and optical fibre cables
• Drafting Committee: IEC/SC 86A - IEC_SC_86A
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 27-Oct-2023
• Due Date: 12-Jul-2024
• Completion Date: 27-Oct-2023
• Ref Project: SIST EN IEC 60794-1-111:2023 - Optical fibre cables - Part 1-111: Generic specification - Basic optical cable test procedures - Mechanical tests methods - Bend, method E11 (IEC 60794-1-111:2023)

Relations

• Splited From: EN 60794-1-21:2015 - Optical fibre cables - Part 1-21: Generic specification - Basic optical cable test procedures - Mechanical tests methods
• Effective Date: 17-Oct-2023
• Splited From: EN 60794-1-21:2015/A1:2020 - Optical fibre cables - Part 1-21: Generic specification - Basic optical cable test procedures - Mechanical tests methods
• Effective Date: 17-Oct-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2023
Optični kabli - 1-111. del: Splošna specifikacija - Osnovni preskusni postopki za
optične kable - Mehanske preskusne metode - Upogib, metoda E11 (IEC 60794-1-
111:2023)
Optical fibre cables - Part 1-111: Generic specification - Basic optical cable test
procedures - Mechanical tests methods - Bend, method E11 (IEC 60794-1-111:2023)
Glasfaserkabel – Teil 1-111: Fachgrundspezifikation – Grundlegende Testverfahren für
optische Kabel - Mechanische Prüfverfahren - Biegung, Verfahren E11 (IEC 60794-1-
111:2023)
Câbles à fibres optiques - Partie 1-111: Spécification générique - Procédures
fondamentales d'essais des câbles optiques - Méthodes d'essai mécanique - Courbures,
méthode E11 (IEC 60794-1-111:2023)
Ta slovenski standard je istoveten z: EN IEC 60794-1-111:2023
ICS:
33.180.10 (Optična) vlakna in kabli Fibres and cables
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 60794-1-111

NORME EUROPÉENNE
EUROPÄISCHE NORM October 2023
ICS 33.180.10 Supersedes EN 60794-1-21:2015 (partially);
EN 60794-1-21:2015/A1:2020 (partially)
English Version
Optical fibre cables - Part 1-111: Generic specification - Basic
optical cable test procedures - Mechanical tests methods - Bend,
method E11
(IEC 60794-1-111:2023)
Câbles à fibres optiques - Partie 1-111: Spécification Glasfaserkabel - Teil 1-111: Fachgrundspezifikation -
générique - Procédures fondamentales d'essais des câbles Grundlegende Testverfahren für optische Kabel -
optiques - Méthodes d'essai mécanique - Courbures, Mechanische Prüfverfahren - Biegung, Verfahren E11
méthode E11 (IEC 60794-1-111:2023)
(IEC 60794-1-111:2023)
This European Standard was approved by CENELEC on 2023-10-24. CENELEC 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 CENELEC 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 CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60794-1-111:2023 E

European foreword
The text of document 86A/2367/FDIS, future edition 1 of IEC 60794-1-111, prepared by SC 86A
"Fibres and cables" of IEC/TC 86 "Fibre optics" was submitted to the IEC-CENELEC parallel vote and
approved by CENELEC as EN IEC 60794-1-111:2023.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2024-07-24
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2026-10-24
document have to be withdrawn
This document partially supersedes EN 60794-1-21:2015 and all of its amendments and corrigenda (if
any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 60794-1-111:2023 was approved by CENELEC as a
European Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standard indicated:
IEC 60793-2-10:2019 NOTE Approved as EN IEC 60793-2-10:2019 (not modified)
IEC 60793-2-50:2018 NOTE Approved as EN IEC 60793-2-50:2019 (not modified)
IEC 60794-1-21:2015 NOTE Approved as EN 60794-1-21:2015 (not modified)
IEC 60794-1-301 NOTE Approved as EN IEC 60794-1-301
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod), the
relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 60793-1-46 - Optical fibres - Part 1-46: Measurement EN 60793-1-46 -
methods and test procedures - Monitoring
of changes in optical transmittance
IEC 60794-1-1 - Optical fibre cables - Part 1-1: Generic EN IEC 60794-1-1 -
specification - General
IEC 60794-1-2 - Optical fibre cables - Part 1-2: Generic EN IEC 60794-1-2 -
specification - Basic optical cable test
procedures - General guidance
IEC 60794-1-111 ®
Edition 1.0 2023-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Optical fibre cables –
Part 1-111: Generic specification – Basic optical cable test procedures –

Mechanical tests methods – Bend, method E11

Câbles à fibres optiques –
Partie 1-111: Spécification générique – Procédures fondamentales d'essais des

câbles optiques – Méthodes d'essai mécanique – Courbures, méthode E11

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.10  ISBN 978-2-8322-7518-4

– 2 – IEC 60794-1-111:2023 © IEC 2023
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 General . 6
4.1 Sample . 6
4.2 Apparatus . 7
4.3 Test methods . 7
4.4 Test conditions . 7
5 Method E11A – Bend as helix . 7
5.1 General . 7
5.2 Single-helix configuration . 8
5.3 Two-helix configuration . 9
5.4 Procedure . 10
6 Method E11B – U bend . 10
7 Requirements . 11
8 Details to be specified . 11
9 Details to be reported . 12
Annex A (informative) Example of a special mandrel for two-helix configuration . 13
Annex B (informative) Rationale for the options of an equal or larger turnaround loop
diameter for the two-helix configuration of method E11A . 14
Bibliography . 19

Figure 1 – Bend test set-up for method E11A: single-helix configuration . 8
Figure 2 – Bend test set-up for method E11A: two-helix configuration . 9
Figure 3 – Bend test set-up for method E11B . 11
Figure A.1 – Example of a special mandrel . 13
Figure B.1 – Options for turnaround loop size for two-helix configuration of
method E11A . 14
Figure B.2 – Difference of change in attenuation for single-mode cable . 17
Figure B.3 – Difference of change in attenuation for multimode cable . 17
Figure B.4 – Worst case difference of change in attenuation . 18

Table B.1 – Used change in attenuation values . 15
Table B.2 – Calculated changes in attenuation of single-mode cable . 15
Table B.3 – Calculated changes in attenuation of multimode cable . 16

IEC 60794-1-111:2023 © IEC 2023 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL FIBRE CABLES –
Part 1-111: Generic specification –
Basic optical cable test procedures –
Mechanical test methods – Bend, method E11

FOREWORD
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