SIST EN 60794-4:2004

SLOVENSKI STANDARD
SIST EN 60794-4:2004
01-september-2004
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SIST EN 187200:2004
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Optical fibre cables - Part 4: Sectional specification - Aerial optical cables along electrical
power lines (IEC 60794-4:2003)
Lichtwellenleiterkabel -- Teil 4: Rahmenspezifikation - Lichtwellenleiter-Luftkabel auf
Starkstrom-Freileitungen
Câbles à fibres optiques -- Partie 4: Spécification intermédiaire - Câbles optiques aériens
le long des lignes électriques de puissance
Ta slovenski standard je istoveten z: EN 60794-4:2003
ICS:
33.180.10 2SWLþQDYODNQDLQNDEOL Fibres and cables
SIST EN 60794-4:2004 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 60794-4:2004

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SIST EN 60794-4:2004
EUROPEAN STANDARD EN 60794-4
NORME EUROPÉENNE
EUROPÄISCHE NORM November 2003

ICS 33.180.10 Supersedes EN 187200:2001


English version


Optical fibre cables
Part 4: Sectional specification –
Aerial optical cables along electrical power lines
(IEC 60794-4:2003)


Câbles à fibres optiques Lichtwellenleiterkabel
Partie 4: Spécification intermédiaire - Teil 4: Rahmenspezifikation -
Câbles optiques aériens le long des lignes Lichtwellenleiter-Luftkabel
électriques de puissance auf Starkstrom-Freileitungen
(CEI 60794-4:2003) (IEC 60794-4:2003)



This European Standard was approved by CENELEC on 2003-11-01. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic,
Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels


© 2003 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 60794-4:2003 E

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SIST EN 60794-4:2004
EN 60794-4:2003 - 2 -
Foreword
The text of document 86A/851/FDIS, future edition 1 of IEC 60794-4, prepared by SC 86A, Fibres and
cables, of IEC TC 86, Fibre optics, was submitted to the IEC-CENELEC parallel vote and was
approved by CENELEC as EN 60794-4 on 2003-11-01.
This European Standard supersedes EN 187200:2001.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2004-08-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2006-11-01

Annexes designated "normative" are part of the body of the standard.
Annexes designated "informative" are given for information only.
In this standard, annex ZA is normative and annex A is informative.
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60794-4:2003 was approved by CENELEC as a European
Standard without any modification.
__________

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SIST EN 60794-4:2004
- 3 - EN 60794-4:2003
Annex ZA
(normative)

Normative references to international publications
with their corresponding European publications
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions of any
of these publications apply to this European Standard only when incorporated in it by amendment or
revision. For undated references the latest edition of the publication referred to applies (including
amendments).
NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
Publication Year Title EN/HD Year
1)
IEC 60104 1987 Aluminium-magnesium-silicon alloy wire - -
for overhead line conductors

IEC 60304 1982 Standard colours for insulation for low- HD 402 S2 1984
frequency cables and wires

IEC 60708-1 1981 Low-frequency cables with polyolefin - -
insulation and moisture barrier
polyolefin sheath
Part 1: General design details and
requirements

IEC 60794-3 2001 Optical fibres cables EN 60794-3 2002
Part 3: Sectional specification - Outdoor
cables

IEC 60811-4-2 1990 Insulating and sheathing materials of EN 60811-4-2 1999
(mod) electric and optical fibre cables -
Common test methods
Part 4: Methods specific to polyethylene
and polypropylene compounds –
Section 2: Tensile strength and
elongation at break after pre-
conditioning - Wrapping test after
thermal ageing in air - Measurement of
mass increase - Long-term stability test
- Test method for copper-catalysed
oxidative degradation

IEC 60811-5-1 1990 Part 5-1: Methods specific to filling EN 60811-5-1 1999
(mod) compounds - Drop point - Separation of
oil - Lower temperature brittleness -
Total acid number - Absence of
corrosive components - Permittivity at
23 °C - D.C. resistivity at 23 °C and
100 °C


1)
EN 50183:2000, which is related to IEC 60104:1987, applies.

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SIST EN 60794-4:2004
EN 60794-4:2003 - 4 -
Publication Year Title EN/HD Year
IEC 60888 1987 Zinc-coated steel wires for stranded - -
conductors

IEC 60889 1987 Hard-drawn aluminium wire for EN 60889 1997
overhead line conductors

2)
IEC 61089 1991 Round wire concentric lay overhead - -
electrical stranded conductors

IEC 61232 (mod) 1993 Aluminium-clad steel wires for electrical EN 61232 1995
purposes

IEC 61394 1997 Overhead lines - Characteristics of - -
greases for aluminium, aluminium alloy
and steel bare conductors

IEC 61395 1998 Overhead electrical conductors - Creep EN 61395 1998
test procedures for stranded conductors




2)
EN 50182:2001, which is related to IEC 61089:1991, applied.

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SIST EN 60794-4:2004
NORME CEI
INTERNATIONALE IEC
60794-4
INTERNATIONAL
Première édition
STANDARD
First edition
2003-06
Câbles à fibres optiques –
Partie 4:
Spécification intermédiaire –
Câbles optiques aériens le long
des lignes électriques de puissance
Optical fibre cables –
Part 4:
Sectional specification –
Aerial optical cables along
electrical power lines
 IEC 2003 Droits de reproduction réservés  Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in any
utilisée sous quelque forme que ce soit et par aucun procédé, form or by any means, electronic or mechanical, including
électronique ou mécanique, y compris la photocopie et les photocopying and microfilm, without permission in writing from
microfilms, sans l'accord écrit de l'éditeur. the publisher.
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Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch  Web: www.iec.ch
CODE PRIX
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Commission Electrotechnique Internationale PRICE CODE
International Electrotechnical Commission
Международная Электротехническая Комиссия
Pour prix, voir catalogue en vigueur
For price, see current catalogue

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SIST EN 60794-4:2004
60794-4  IEC:2003 – 3 –
CONTENTS
FOREWORD . 7
1 Scope . 11
2 Normative references. 11
3 Definitions and abbreviations of cables. 13
3.1 Definitions . 13
3.2 Abbreviations of cables. 13
4 Optical fibre . 15
4.1 General . 15
4.2 Attenuation . 15
4.2.1 Attenuation coefficient . 15
4.2.2 Attenuation uniformity . 15
4.3 Cut-off wavelength of cabled fibre. 15
4.4 Fibre colouring. 15
4.5 Polarization mode dispersion (PMD) . 15
5 Cable element . 17
5.1 Slotted core . 17
5.2 Plastic tube. 17
5.3 Ribbon. 19
5.4 Metallic tube . 19
5.4.1 Metallic tube on the optical core. 19
5.4.2 Fibres directly located in a metallic tube . 19
6 Optical fibre cable construction. 19
6.1 General . 19
6.2 Lay-up of the cable elements . 21
6.3 Cable core filling. 21
6.4 Strength members . 21
6.4.1 OPGW, OPPC and MASS . 21
6.4.2 ADSS and OPAC . 23
6.5 Inner sheath . 23
6.6 Outer sheath. 23
6.7 Sheath marking . 23
7 Main requirements for installation and operating conditions . 23
7.1 General . 23
7.2 Characterization of optical units for splicing purpose . 23
8 Design characteristics. 23
9 Optical fibre cable tests . 25
9.1 Classification of tests. 27
9.1.1 Type tests. 27
9.1.2 Sample tests. 27
9.1.3 Routine tests . 27
9.2 Tensile performance . 27
9.3 Stress-strain test on metallic cables. 27

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SIST EN 60794-4:2004
60794-4  IEC:2003 – 5 –
9.4 Installation capability . 29
9.4.1 Sheave test . 29
9.4.2 Repeated bending. 29
9.4.3 Impact . 29
9.4.4 Crush. 29
9.4.5 Kink . 29
9.4.6 Torsion . 29
9.5 Temperature cycling . 29
9.6 Short circuit . 29
9.7 Lightning test. 31
9.8 Ageing . 31
9.8.1 Fibre coating compatibility . 31
9.8.2 Finished cable . 31
9.9 Hydrogen gas . 31
9.10 Aeolian vibration. 31
9.11 Creep . 31
9.12 Fitting compatibility. 31
9.13 Water penetration (for filled cables only). 31
9.14 Bleeding (for filled cables only). 33
9.15 Grease . 33
9.16 Attenuation . 33
9.17 Tracking and erosion resistance test on ADSS and OPAC . 33
9.18 Weathering resistance test on ADSS and OPAC . 33
9.19 Shotgun resistance test on ADSS and OPAC. 33
9.20 Conductor access trolley for OPAC. 33
10 Quality assurance . 33
11 Packaging. 33
Annex A (informative) Recommended methods of calculating rated tensile strength,
cross-section of a layer of trapezoidal shaped wires, modulus of elasticity, linear
expansion and d.c. resistance . 35
Table 1 – Design characteristics .25

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SIST EN 60794-4:2004
60794-4  IEC:2003 – 7 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
OPTICAL FIBRE CABLES –
Part 4: Sectional specification –
Aerial optical cables along electrical power lines
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, the IEC publishes International Standards. Their preparation is
entrusted to technical committees; any IEC National Committee interested in the subject dealt with may
participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. The IEC collaborates closely with the International
Organization for Standardization (ISO) in accordance with conditions determined by agreement between the
two organizations.
2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an
international consensus of opinion on the relevant subjects since each technical committee has representation
from all interested National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical specifications, technical reports or guides and they are accepted by the National
Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60794-4 has been prepared by subcommittee 86A: Fibres and
cables, of IEC technical committee 86: Fibre optics.
The text of this standard is based on the following documents:
FDIS Report on voting
86A/851/FDIS 86A/859/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

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SIST EN 60794-4:2004
60794-4  IEC:2003 – 9 –
IEC 60794 consists of the following parts under the general title Optical fibre cables
– Part 1-1: Generic specification – General
– Part 1-2: Generic specification – Basic optical cable test procedures
– Part 2: Sectional specification – Indoor cables
– Part 3: Sectional specification – Outdoor cables
– Part 4: Sectional specification – Aerial optical cables along electrical power line
The committee has decided that the contents of this publication will remain unchanged until
April 2007. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.

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SIST EN 60794-4:2004
60794-4  IEC:2003 – 11 –
OPTICAL FIBRE CABLES –
Part 4: Sectional specification –
Aerial optical cables along electrical power lines
1 Scope
This part of IEC 60794 specifies the electrical, mechanical and optical requirements and test
methods for aerial optical cables including OPGW (optical ground wire), OPPC (optical phase
conductor), MASS (metallic aerial self-supported cable), ADSS (all-dielectric self-supporting
cable) and OPAC (optical attached cable).
2 Normative references
The following referenced documents are indispensable for the application 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.
They complete the normative references already listed in the generic specification (IEC
60794-1-1, Clause 2, and IEC 60794-1-2, Clause 2) and in the sectional specification (IEC
60794-3, Clause 2).
IEC 60104:1987, Aluminium-magnesium-silicon alloy wire for overhead line conductors
IEC 60304:1982, Standard colours for insulation for low-frequency cables and wires
IEC 60708-1:1981, Low-frequency cables with polyolefin insulation and moisture barrier
polyolefin sheath – Part 1: General design details and requirements
IEC 60794-3:2001, Optical fibre cables – Part 3: Sectional specification – Outdoor cables
IEC 60811-4-2:1990, Common test methods for insulating and sheathing materials of electric
cables – Part 4: Methods specific to polyethylene and polypropylene compounds – Section
Two: Elongation at break after pre-conditioning – Wrapping test after pre-conditioning –
Wrapping test after thermal ageing in air – Measurement of mass increase – Long-term
stability test (Appendix A) – Test method for copper-catalysed oxidative degradation
(Appendix B)
IEC 60811-5-1:1990, Common test methods for insulating and sheathing materials of electric
cables – Part 5: Methods specific to filling compounds – Section one: Drop point – Separation
of oil – Lower temperature brittleness – Total acid number – Absence of corrosive
components – Permittivity at 23 °C – DC resistivity at 23 °C and 100 °C
IEC 60888:1987, Zinc-coated steel wires for stranded conductors

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SIST EN 60794-4:2004
60794-4  IEC:2003 – 13 –
IEC 60889:1987, Hard-drawn aluminium wire for overhead line conductors
IEC 61089:1991, Round wire concentric lay overhead electrical stranded conductors
IEC 61232:1993, Aluminium-clad steel wires for electrical purposes
IEC 61394:1997, Overhead lines – Characteristics of greases for aluminium, aluminium alloy
and steel bare conductors
IEC 61395:1998, Overhead electrical conductors – Creep test procedures for stranded
conductors
3 Definitions and abbreviations of cables
3.1 Definitions
For the purposes of this document, the following definitions and abbreviations of cables apply.
3.1.1
MAT
maximum allowable tension
maximum tensile load that may be applied to the cable without detriment to the tensile
performance requirement (optical performance, fibre strain)
3.1.2
RTS
rated tensile strength
summation of the product of nominal cross-sectional area, minimum tensile strength and
stranding factor for each load bearing material in the cable construction (refer to Annex A in
the case of OPGW)
3.1.3
strain margin
amount of strain the OCEPL can sustain without strain on the fibres due to the OCEPL's
elongation
3.2 Abbreviations of cables
ADSS all-dielectric self-supporting cable
MASS metallic aerial self-supported cable which is not designed to have ground or phase
capability
OCEPL optical cable to be used along electrical power lines
OPAC optical attached cable consisting of the following three attachment methods:
• wrapped: all-dielectric (wrap). Using special machinery, a lightweight flexible
non-metallic cable can be wrapped helically around either the earth wire or the
phase conductor.
• lashed: non-metallic cables that are installed longitudinally alongside the earth
wire, the phase conductor or on a separate catenary (on a pole route) and are
held in position with a binder or adhesive cord.

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SIST EN 60794-4:2004
60794-4  IEC:2003 – 15 –
• preform attached: similar to the lashed cables except that the method of
attachment involves the use of special preformed spiral attachment clips.
OPGW optical ground wire. An OPGW has the dual performance functions of a conven-
tional ground wire with telecommunication capabilities.
OPPC optical phase conductor. An OPPC has the dual performance functions of a phase
conductor with telecommunication capabilities.
4 Optical fibre
4.1 General
Single-mode optical fibre which meets the requirements of IEC 60793-2 shall be used. Fibres
other than those specified above can be used, if mutually agreed between the customer and
the supplier.
4.2 Attenuation
4.2.1 Attenuation coefficient
The typical maximum attenuation coefficient of a cable at 1 310 nm is 0,45 dB/km and/or at
1 550 nm it is 0,30 dB/km. Particular values shall be agreed between the customer and the
supplier.
The attenuation coefficient shall be measured in accordance with IEC 60793-1-40.
4.2.2 Attenuation uniformity
4.2.2.1 Attenuation discontinuities
The local attenuation shall not have point discontinuities in excess of 0,10 dB.
The test method best suited to provide the functional requirements is in accordance with
IEC 60793-1-40.
4.2.2.2 Attenuation linearity
The functional requirements are under consideration.
4.3 Cut-off wavelength of cabled fibre
The cabled fibre cut-off wavelength λcc shall be less than the operational wavelength.
4.4 Fibre colouring
If the primary coated fibres are coloured for identification, the coloured coating shall be
readily identifiable throughout the lifetime of the cable and shall be a reasonable match to
IEC 60304. If required, the colouring shall permit sufficient light to be transmitted through
the primary coating to allow local light injection and detection. Alternatively, the colour may
be removable.
4.5 Polarization mode dispersion (PMD)
Refer to 5.5 of IEC 60794-3.

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SIST EN 60794-4:2004
60794-4  IEC:2003 – 17 –
5 Cable element
Generally, optical cables comprise several elements or individual constituents, depending on
the cable design, which take into account the cable application, operating environment and
manufacturing processes, and the need to protect the fibre during handling and cabling.
The material(s) used for a cable element shall be selected to be compatible with the other
elements in contact with it. An appropriate compatibility test method shall be defined in the
family or product specification.
Optical elements (cable elements containing optical fibres) and each fibre within a cable
element shall be uniquely identified, for example, by colours, by a positional scheme, by
markings or as specified in the product specification.
Different types of optical elements are described below.
5.1 Slotted core
The slotted core is either a metallic (for example, aluminium alloy) or non-metallic (for
example, polyethylene or polypropylene) material with a defined number of slots, with
longitudinal, helical or SZ configuration along the core. One or more primary coated fibres or
optical element is located in each slot which shall be filled, if necessary, with a suitable water
blocking system.
If metallic, it shall be electrically bonded with the other metallic elements of the cable. If non-
metallic, the slotted core usually contains a central element which shall be non-metallic. In
this case, there shall be adequate adhesion between the central element and the extruded
core in order to obtain the required temperature stability and tensile behaviour for the slotted
core element.
The profile of the slot shall be uniform and shall ensure the optical and mechanical
performance required for the optical cable.
5.2 Plastic tube
One or more primary coated fibres or optical elements are packaged, loosely or not, in a tube
construction which shall be filled, if necessary, with a suitable water-blocking system. The
plastic tube may be reinforced with a composite wall.
If required, the suitability of the tube shall be determined by an evaluation of its kink
resistance in accordance with IEC 60794-1-2, Method G7.
The filling compound in the tube shall comply with IEC 60794-1-2, Method E14 (compound
flow (drip)) or Method E15 (bleeding and evaporation).

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SIST EN 60794-4:2004
60794-4  IEC:2003 – 19 –
5.3 Ribbon
Optical fibre ribbons are optical fibres assembled in accordance with IEC 60794-3.
5.4 Metallic tube
5.4.1 Metallic tube on the optical core
A metallic tube (for example, aluminium tub
...