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IEC 60794-1-401
Edition 1.0 2021-07
INTERNATIONAL
STANDARD
Optical fibre cables –
Part 1-401: Generic specification – Basic optical cable test procedures –
Electrical test methods – Short-circuit test (for OPGW, OPPC and OPAC),
Method H1
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IEC 60794-1-401
Edition 1.0 2021-07
INTERNATIONAL
STANDARD
Optical fibre cables –
Part 1-401: Generic specification – Basic optical cable test procedures –
Electrical test methods – Short-circuit test (for OPGW, OPPC and OPAC),
Method H1
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.180.10 ISBN 978-2-8322-1008-4
– 2 – IEC 60794-1-401:2021 © IEC 2021
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms, definitions and abbreviated terms . 6
3.1 Terms and definitions . 6
3.2 Abbreviated terms . 6
4 Sample . 6
4.1 OPGW and OPPC testing. 6
4.1.1 Two samples test method . 6
4.1.2 One sample test method . 7
4.2 OPAC testing . 7
5 Apparatus . 8
6 Procedure . 10
6.1 OPGW testing . 10
6.2 OPPC testing . 11
6.3 OPAC testing . 11
6.4 Common procedure for all tested cables . 11
7 Requirements . 12
8 Details to be specified . 12
8.1 OPGW and OPPC testing. 12
8.2 OPAC testing . 12
Bibliography . 13
Figure 1 – OPGW/OPPC short-circuit test arrangement . 9
Figure 2 – OPAC short-circuit test arrangement . 10
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL FIBRE CABLES –
Part 1-401: Generic specification – Basic optical cable
test procedures – Electrical test methods –
Short-circuit test (for OPGW, OPPC and OPAC), Method H1
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of 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, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). 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. 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 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 IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
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transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
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6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
IEC 60794-1-401 has been prepared by subcommittee 86A: Fibres and cables, of IEC
technical committee 86: Fibre optics. It is an International Standard.
This first edition cancels and replaces the first edition of IEC 60794-1-24 published in 2014.
This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) OPPC is included;
b) the test methods have been updated.
– 4 – IEC 60794-1-401:2021 © IEC 2021
The text of this standard is based on the following documents:
Draft Report on voting
86A/2044/CDV 86A/2127/RVC
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement,
available at /members_experts/refdocs. The main document types developed by
IEC are described in greater detail at /standardsdev/publications.
A list of all the parts in the IEC 60794 series, published under the general title Optical fibre
cables, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
INTRODUCTION
The electrical tests contained in IEC 60794-1-24:2014 will now be individually numbered in
the IEC 60794-1-4xx series. Each test method is now considered to be an individual
document rather than part of a multi-test method compendium. Full cross-reference details
are given in IEC 60794-1-2.
– 6 – IEC 60794-1-401:2021 © IEC 2021
OPTICAL FIBRE CABLES –
Part 1-401: Generic specification – Basic optical cable
test procedures – Electrical test methods –
Short-circuit test (for OPGW, OPPC and OPAC), Method H1
1 Scope
This part of IEC 60794 applies to the short-circuit test intended to assess the performance of
an optical ground wire (OPGW) or optical phase conductor (OPPC) under typical short-circuit,
or the impact on the performance of optical attached cable (OPAC) under short-circuit current
on the messenger wire.
2 Normative references
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.
IEC 60793-1-46, Optical fibres – Part 1-46: Measurement methods and test procedures –
Monitoring of changes in optical transmittance
IEC 60794-1-1, Optical fibre cables – Part 1-1: Generic specification – General
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
For the purposes of this document, the definitions given in IEC 60794-1-1 apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.2 Abbreviated terms
OPAC optical attached cable
OPGW optical ground wire
OPPC optical phase conductor
RTS rated tensile strength
4 Sample
4.1 OPGW and OPPC testing
4.1.1 Two samples test method
A typical arrangement using two test samples is shown in Figure 1a).
Two samples, each being at least 10 m long, shall be terminated at each end with suitable
fittings. In sample A, one or more thermocouples shall be inserted into holes drilled into the
optical unit to monitor the optical unit temperature. In sample B, one or more thermocouples
shall be attached to the OPGW/OPPC to monitor the locations where OPGW/OPPC maximum
temperature is expected (i.e. between ACS wires, or between ACS and aluminium alloy
wires). The optical attenuation of the monitored fibres shall be measured according to
IEC 60793-1-46. The test length of the optical fibre shall be longer than 100 m. The test loop
shall preferably include at least 24 fibres (fibre concatenation shall be used), or all the fibres
in the cable when the fibre count
...