CLC/TR 50117-8:2013
(Main)Coaxial cables used in cabled distribution networks - Part 8: Repair and substitute of damaged buried cables
Coaxial cables used in cabled distribution networks - Part 8: Repair and substitute of damaged buried cables
This Technical Report describes the procedure to repair damaged CATV cables. The following coaxial cables are considered in this guide: – Coaxial cables with semi air spaced dielectric Outer conductor: copper band, longitudinal welded – Coaxial cables foamed polyethylene or solid polyethylene dielectric Outer conductor: copper band, longitudinal welded – Coaxial cables foamed polyethylene or solid polyethylene dielectric Outer conductor: Overlapped foil of copper or aluminium with braid – Coaxial cables foamed polyethylene or solid polyethylene dielectric Outer conductor: Overlapped foil of copper or aluminium without braid – Coaxial cables foamed polyethylene dielectric Outer conductor: Corrugated copper This guide is a helpful tool for providers and installers to find out the extend and the effects of damaged cables and to achieve and to evaluate appropriate repair operation. For not buried cables, e.g. indoor cables, the application of this guide is analogous. NOTE The kind respectively the material of the cable sheath makes the coaxial cable an "underground" cable. In the underground area the cable jacket determines the long term behaviour of the cable significantly. For this purpose, only plastics with a high long-term stability are used, usually polyethylene (PE). This material provides protection against ingress of water or water-diffusion with good mechanical properties.
Koaxialkabel für Kabelverteilanlagen - Teil 8: Reparatur und Ersatz beschädigter Koaxialkabel
Câbles coaxiaux pour réseaux câblés de distribution - Partie 8: Réparation et remplacement de câbles coaxiaux souterrain
Koaksialni kabli v kabelskih razdelilnih omrežjih - 8. del: Popravilo in zamenjava poškodovanih zasutih kablov
To tehnično poročilo vsebuje opis postopka za popravilo poškodovanih kablov CATV. V navodila so vključeni ti koaksialni kabli:
– koaksialni kabli z medsebojno oddaljenimi dielektiki,
zunanji vodnik: bakreni trak, varjen po dolžini;
– koaksialni kabli z dielektikom iz penastega ali trdega polietilena,
zunanji vodnik: bakreni trak, varjen po dolžini;
– koaksialni kabli z dielektikom iz penastega ali trdega polietilena,
zunanji vodnik: prekrižan oplet folije iz bakra ali aluminija;
– koaksialni kabli z dielektikom iz penastega ali trdega polietilena,
zunanji vodnik: prekrižana folija iz bakra ali aluminija brez opleta;
– koaksialni kabli z dielektikom iz penastega polietilena,
zunanji vodnik: valovita bakrena pločevina.
Ta navodila so ponudnikom in monterjem v pomoč pri ugotavljanju stopnje poškodovanosti kablov in njihovih posledic ter pri ocenjevanju ustreznosti postopka za popravilo in izvedbi popravila. Za kable, ki niso položeni v zemljo, tj. notranje kable, je uporaba teh navodil analogna.
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-april-2013
Koaksialni kabli v kabelskih razdelilnih omrežjih - 8. del: Popravilo in zamenjava
poškodovanih zasutih kablov
Coaxial cables used in cabled distribution networks - Part 8 Repair and substitute of
damaged buried cables
Koaxialkabel für Kabelverteilanlagen - Teil 8: Reparatur und Ersatz beschädigter
Koaxialkabel
Câbles coaxiaux pour réseaux câblés de distribution - Partie 8: Réparation et
remplacement de câbles coaxiaux souterrain
Ta slovenski standard je istoveten z: CLC/TR 50117-8:2013
ICS:
33.120.10 Koaksialni kabli. Valovodi Coaxial cables. Waveguides
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
TECHNICAL REPORT
CLC/TR 50117-8
RAPPORT TECHNIQUE
March 2013
TECHNISCHER BERICHT
ICS 33.120.10
English version
Coaxial cables used in cabled distribution networks -
Part 8: Repair and substitute of damaged buried cables
Câbles coaxiaux pour réseaux câblés de Koaxialkabel für Kabelverteilanlagen -
distribution - Teil 8: Reparatur und Ersatz beschädigter
Partie 8: Réparation et remplacement de Koaxialkabel
câbles coaxiaux souterrain
This Technical Report was approved by CENELEC on 2013-02-26.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,
the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany,
Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Management Centre: Avenue Marnix 17, B - 1000 Brussels
© 2013 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. CLC/TR 50117-8:2013 E
Contents
Page
Foreword . 4
1 Scope . 5
2 Normative References . 5
3 Terms and definitions . 6
4 Coaxial cables . 6
4.1 Construction of coaxial cables . 6
4.2 Long term behaviour and asset of coaxial underground cables . 6
5 Laying of underground cables . 6
5.1 General . 6
5.2 Laying in the sand bed . 7
5.3 Laying in ducts . 7
5.4 Laying in a duct system . 7
5.5 Laying in the conduit . 7
6 Effects of damage . 7
6.1 General . 7
6.2 Repair . 7
6.3 Influence to electric characteristics . 8
7 Types of errors . 9
7.1 General . 9
7.2 Transection without stretching (shearing, cutting) . 9
7.3 Disruption / cable elongation with impact on indefinite length . 9
7.4 Strain / elongation without tearing effect with an indefinite length of cable. 9
7.5 Other damage with selective or limited local impact . 9
7.5.1 General . 9
7.5.2 Deformation without stretching, such as squeezing, compressing, dropping
below the minimum bending radius . 9
7.5.3 Damage to the outer sheath by fire or heat . 9
7.5.4 Slightly damaged cable sheath without deformation of the outer conductors . 10
8 Failure analysis and repair . 10
8.1 General . 10
8.2 Fundamental distinction of occurring damage and its repair . 10
8.2.1 General . 10
8.2.2 Cable was not elongated . 11
8.2.4 Cable was deformed . 11
8.2.5 Jacket was damaged . 11
8.2.6 Outer conductor has transverse cracks . 11
8.2.7 Screening effectiveness otherwise affected . 12
8.2.8 Inner conductor looks out from the cable ends . 12
8.2.9 Diameter of inner and outer conductor within the specified limits . 12
8.2.10 Effects of tensile forces to remote components . 12
8.2.11 Measures for damaged cables with 60 - Ohm impedance . 12
8.2.12 Repairs due to other influences . 12
9 Attenuation of cable joints and connectors . 12
– 3 – CLC/TR 50117-8:2013
10 Use of materials and correct handling . 13
10.1 General . 13
10.2 Proper processing . 13
11 Documentation . 14
12 Measurement evidence . 14
12.1 Measuring of power levels . 14
12.2 Measuring of reflexion . 14
12.3 Measuring of radiated power . 14
12.4 Measuring of Bit Error Rate (BER) . 14
Annex A (informative) Theoretical Background . 15
A.1 Physical background and Characteristics / parameters for coaxial cable . 15
A.2 Reflection coefficient . 16
A.3 Return loss . 16
A.4 Pulse return loss . 17
Annex B (informative) Examples of damage . 19
Bibliography . 23
Figure 1 Construction of a coaxial cable . 6
Figure A.1 Coaxial cables . 15
Figure A.2 Schematic depiction for measuring the return loss . 17
Figure A.3 Composition of the test device for measuring the pulse reflection . 18
Figure B.1 Typical damage by laying new paths across the cable path . 19
Figure B.2 Underground cable repair of a selectively damaged cable without
elongation . 19
Figure B.3 Effect of tensile forces: building entry pulled out of the brickwork, the
basement conduit installation ripped out of wall . 20
Figure B.4 Selectively damaged cable: sheath peeled off . 20
Figure B.5 Cable cut by blade . 20
Figure B.6 Torn underground cables . 21
Figure B.7 Damaged cable by tension forces, inner conductor torned. . 21
Figure B.8 Perforated screening by pulling forces: Screening effectiveness drastically
reduced . 21
Figure B.9 Inside of the perforated screening foil by elongation of the coaxial cable
shielding . 22
Foreword
This document (CLC/TR 50117-8:2013) has been prepared by CLC/SC 46XA "Coaxial cables".
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
EN 50117 is divided into the following parts:
− EN 50117-1, Coaxial cables Part 1: Generic specification
− EN 50117-2-1, Coaxial cables Part 2-1: Sectional specification for cables used in cabled
distribution networks Indoor drop cables for systems operating at 5 MHz - 1 000 MHz
− EN 50117-2-2, Coaxial cables Part 2-2: Sectional specification for cables used in cabled
distribution networks Outdoor drop cables for systems operating at 5 MHz - 1 000 MHz
− EN 50117-2-3, Coaxial cables Part 2-3: Sectional specification for cables used in cabled
distribution networks Distribution and trunk cables for systems operating at 5 MHz - 1 000 MHz
− EN 50117-2-4, Coaxial cables Part 2-4: Sectional specification for cables used in cabled
distribution networks Indoor drop cables for systems operating at 5 MHz - 3 000 MHz
− EN 50117-2-5, Coaxial cables Part 2-5: Sectional specification for cables used in cabled
distribution networks Outdoor drop cables for systems operating at 5 MHz - 3 000 MHz
− EN 50117-3-1, Coaxial cables Part 3-1: Sectional specifications for cables used in Telecom
applications Miniaturized cables used in digital communication systems
− EN 50117-4-1, Coaxial cables Part 4-1: Sectional specification for cables for BCT cabling in
accordance with EN 50173 Indoor drop cables for systems operating at 5 MHz - 3 000 MHz
− EN 50117-5, Coaxial cables used in cabled distribution networks Part 5: Sectional specification
for indoor drop cables for use in networks operating at frequencies between 5 MHz and 2150
MHz
− EN 50117-6, Coaxial cables used in cabled distribution networks Part 6: Sectional specification
for outdoor drop cables for use in networks operating at frequencies between 5 MHz and 2150
MHz
− CLC/TR 50117-8, Coaxial cables used in cabled distribution networks Part 8 Repair and
substitute of damaged buried cables
– 5 – CLC/TR 50117-8:2013
1 Scope
This Technical Report describes the procedure to repair damaged CATV cables.
The following coaxial cables are considered in this guide:
– Coaxial cables with semi air spaced dielectric
Outer conductor: copper band, longitudinal welded
– Coaxial cables foamed polyethylene or solid polyethylene dielectric
Outer conductor: copper band, longitudinal welded
– Coaxial cables foamed polyethylene or solid polyethylene dielectric
Outer conductor: Overlapped foil of copper or aluminium with braid
– Coaxial cables foamed polyethylene or solid polyethylene dielectric
Outer conductor: Overlapped foil of copper or aluminium without braid
– Coaxial cables foamed polyethylene dielectric
Outer conductor: Corrugated copper
This guide is a helpful tool for providers and installers to find out the extend and the effects of
damaged ca
...
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