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BSI PD CLC/TR 50117-8:2013

$142.49

Coaxial cables used in cabled distribution networks – Repair and substitute of damaged buried cables

Published By Publication Date Number of Pages
BSI 2013 28
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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 poly ethylene 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 pr ovides protection against ingress of water or water-diffusion with good mechanical properties.

PDF Catalog

PDF Pages PDF Title
6 Foreword
7 1 Scope
2 Normative References
8 3 Terms and definitions
4 Coaxial cables
4.1 Construction of coaxial cables
4.2 Long term behaviour and asset of coaxial underground cables
5 Laying of underground cables
5.1 General
9 5.2 Laying in the sand bed
5.3 Laying in ducts
5.4 Laying in a duct system
5.5 Laying in the conduit
6 Effects of damage
6.1 General
6.2 Repair
10 6.3 Influence to electric characteristics
11 7 Types of errors
7.1 General
7.2 Transection without stretching (shearing, cutting)
7.3 Disruption / cable elongation with impact on indefinite length
7.4 Strain / elongation without tearing effect with an indefinite length of cable
7.5 Other damage with selective or limited local impact
7.5.1 General
7.5.2 Deformation without stretching, such as squeezing, compressing, dropping below the minimum bending radius
7.5.3 Damage to the outer sheath by fire or heat
12 7.5.4 Slightly damaged cable sheath without deformation of the outer conductors
8 Failure analysis and repair
8.1 General
8.2 Fundamental distinction of occurring damage and its repair
8.2.1 General
13 8.2.2 Cable was not elongated
8.2.4 Cable was deformed
8.2.5 Jacket was damaged
8.2.6 Outer conductor has transverse cracks
14 8.2.7 Screening effectiveness otherwise affected
8.2.8 Inner conductor looks out from the cable ends
8.2.9 Diameter of inner and outer conductor within the specified limits
8.2.10 Effects of tensile forces to remote components
8.2.11 Measures for damaged cables with 60 – Ohm impedance
8.2.12 Repairs due to other influences
9 Attenuation of cable joints and connectors
15 10 Use of materials and correct handling
10.1 General
10.2 Proper processing
16 11 Documentation
12 Measurement evidence
12.1 Measuring of power levels
12.2 Measuring of reflexion
12.3 Measuring of radiated power0F1)
12.4 Measuring of Bit Error Rate (BER)
17 Annex A (informative) Theoretical Background
A.1 Physical background and Characteristics / parameters for coaxial cable
18 A.2 Reflection coefficient
A.3 Return loss
19 A.4 Pulse return loss
21 Annex B (informative) Examples of damage
25 Bibliography
BSI PD CLC/TR 50117-8:2013
$142.49