BS EN 60728-11:2017
$215.11
Cable networks for television signals, sound signals and interactive services – Safety
Published By | Publication Date | Number of Pages |
BSI | 2017 | 94 |
IEC 60728-11:2016 deals with the safety requirements applicable to fixed sited systems and equipment. As far as applicable, it is also valid for mobile and temporarily installed systems, for example, caravans. This fourth edition cancels and replaces the third edition published in 2010. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: – Correction of minimum cross-section of bonding conductor in Figure 6, Figure 14 and Figure 17. – Creation of new symbols for “overvoltage protective device – (OPD)” and for “coaxial overvoltage protective device – (COPD)”. – Introduction of new OPD symbol to 3.2, Figure 3 and Figure 6. – Introduction of new COPD symbol to 3.2 and Figure 19. – In 3.1 replacement of terms CATV, MATV and SMATV by new terms and definitions due to changes in technology and use of cable networks. – Extension for remote feeding voltage on subscriber feeder. – Adaption to Edition 2.0 of the IEC 62305 series. – Deletion of informative Annex C and normative reference to the simplified software for the calculation of risk due to lightning (Annex J of IEC 62305-2:2006.) – New subclause 10.2.6 Fully-isolated system outlet provided by means of a FTTH system. The contents of the corrigendum of July 2016 have been included in this copy.
PDF Catalog
PDF Pages | PDF Title |
---|---|
2 | National foreword |
15 | English CONTENTS |
19 | FOREWORD |
21 | INTRODUCTION |
22 | 1 Scope 2 Normative references |
23 | 3 Terms, definitions, symbols and abbreviations 3.1 Terms and definitions |
30 | 3.2 Symbols 3.3 Abbreviations |
31 | 4 Fundamental requirements 4.1 General |
32 | 4.2 Mechanical requirements 4.3 Accessible parts 4.4 Laser radiation 5 Protection against environmental influences 6 Equipotential bonding and earthing 6.1 General requirements 6.2 Equipotential bonding mechanisms |
34 | Figures Figure 1 – Example of equipotential bonding and earthing of a metal enclosure inside a non-conductive cabinet for outdoor-use |
35 | Figure 2 – Example of equipotential bonding of a building installation |
36 | Figure 3 – Example of equipotential bonding and indirect earthing of a metal enclosure inside a non-conductive cabinet for outdoor-use |
38 | Figure 4 – Example of equipotential bonding and earthing of a building installation (underground connection) |
39 | Figure 5 – Example of equipotential bonding and earthing of a building installation (above ground connection) |
40 | Figure 6 – Example of equipotential bonding with a galvanic isolated cable entering a building (underground connection) |
42 | Figure 7 – Example of maintaining equipotential bonding whilst a unit is removed |
43 | 6.3 Equipotential bonding in meshed systems 6.3.1 References to other standards 6.3.2 General on AC mains 6.3.3 AC power distribution and connection of the protective conductor 6.3.4 Dangers and malfunction |
44 | 6.3.5 Measures 7 Mains-supplied equipment |
45 | 8 Remote power feeding in cable networks 8.1 Remote power feeding 8.1.1 Maximum allowed voltages 8.1.2 General requirements for equipment 8.1.3 Current-carrying capacity and dielectric strength of the components |
46 | 8.2 Remote powering from subscriber premises 9 Protection against contact and proximity to electric power distribution systems 9.1 General 9.2 Overhead lines 9.2.1 Overhead lines up to 1 000 V Tables Table 1 – Maximum allowed operation voltages and maximum recommendedcurrents for coaxial cables in the EN 50117 series |
47 | 9.2.2 Overhead lines above 1 000 V 9.3 House installations up to 1 000 V 10 System outlets and transfer points 10.1 General |
48 | 10.2 System outlet 10.2.1 Types of system outlets 10.2.2 Fully isolated system outlet 10.2.3 Semi-isolated system outlet 10.2.4 Non-isolated system outlet with protective element |
49 | 10.2.5 Non-isolated system outlet without protective element 10.2.6 Fully-isolated system outlet provided by means of a FTTH system 10.3 Transfer point Figure 8 − MDU building installed with FTTH technology |
50 | 11 Protection against atmospheric overvoltages and elimination of potential differences 11.1 General |
51 | 11.2 Protection of the antenna system 11.2.1 Selection of appropriate methods for protection of antenna systems Figure 9 – Areas of antenna-mounting in or on buildings, where earthing is not mandatory |
52 | 11.2.2 Building equipped with a lightning protection system (LPS) Table 2 – Solutions for protection of antenna systems against atmospheric overvoltages |
54 | Figure 10 – Flow chart for selection of the appropriate method for protecting the antenna system against atmospheric overvoltages |
56 | Figure 11 – Example of equipotential bonded headends and antennas in a protected volume of the building LPS |
57 | Figure 12 – Example of equipotential bonded headends and antennas in a protected volume of the building LPS |
58 | Figure 13 – Example of equipotential bonded headends and antennas in a protected volume of an external isolated ATS |
59 | Figure 14 – Example of equipotential bonded antennas (not installed in a protected volume) and headend with direct connection to building LPS |
60 | 11.2.3 Building not equipped with an LPS |
62 | Figure 15 – Example of equipotential bonded headend and earthed antennas (building without LPS) |
63 | Figure 16 – Example of bonding for antennas and headend (building without LPS and lightning risk lower than or equal to the tolerable risk) |
64 | 11.3 Earthing and bonding of the antenna system 11.3.1 Internal protection system 11.3.2 Earthing conductors |
66 | Figure 17 – Example of protecting an antenna system (not installed in a protected volume) by additional bonding conductors (R > RT) |
67 | 11.3.3 Earth termination system |
69 | 11.4 Overvoltage protection Figure 18 – Examples of earthing mechanisms (minimum dimensions) |
70 | 12 Mechanical stability 12.1 General requirements Figure 19 – Example of an overvoltage protective device for single dwelling unit |
71 | 12.2 Bending moment Figure 20 – Example of bending moment of an antenna mast |
72 | 12.3 Wind-pressure values 12.4 Mast construction 12.5 Data to be published |
74 | Annex A (informative) Earth loop impedance A.1 General A.2 Earthing for fault conditions |
75 | A.3 Earthing to protect against hazardous touch voltage Figure A.1 – Systematic of earth loop resistance |
76 | A.4 Temporary safety measures |
77 | Annex B (informative) Use of shield wires to protect installations with coaxial cables B.1 General B.2 Soil quality determines shield-wiring necessity B.3 Protective measures against direct lightning strikes on under ground cables Table B.1 – Conductivity of different types of soil |
78 | Figure B.1 – Principle of single shield wire Table B.2 – Protection factors (Kp) of protection measuresagainst direct lightning strokes for buried cables |
79 | Figure B.2 – Principle of two shield wires |
80 | Annex C (informative) Differences in some countries C.1 Subclause 6.1 C.1.1 France C.1.2 Japan C.2 Subclause 6.2 C.2.1 France C.2.2 Norway C.2.3 Japan and Poland C.3 Subclause 6.3 – Norway C.3.1 Justification |
81 | C.3.2 Equipotential bonding mechanism for cable networks Figure C.1 – IT power distribution system in Norway |
82 | Figure C.2 – Example of installations located farther than 20 m away from a transforming station |
83 | Figure C.3 – Example of installations located closer than 20m from a transforming station |
84 | Figure C.4 – Example of cabinets for cable network with locally fed equipment and mains placed less than 2 m apart Figure C.5 – Example of cabinets for cable network with remotely fed equipment and mains placed less than 2 m apart |
85 | Figure C.6 – Example of cabinets for cable network with locally fed equipmentand mains placed more than 2 m apart Figure C.7 – Example of cabinets for cable network with remotely fed equipment and mains placed more than 2m apart |
86 | C.3.3 Use of galvanic isolation in a cable network with remote power-feeding C.3.4 Use of voltage dependent protective device in a cable network Figure C.8 – Example of an installation placing the amplifier in front of the galvanic isolator |
87 | Figure C.9 – Example of protection using a voltage depending device on network installations on poles |
88 | C.4 Subclause 8.1.1 – Japan C.5 Subclause 9.1 – France C.6 Subclause 9.2 – Japan C.7 Subclause 10.1 C.7.1 Sweden C.7.2 UK C.8 Subclause 10.2 – Japan |
89 | C.9 Subclause 11.1 – Japan C.10 Subclause 11.2 C.10.1 Germany C.10.2 Japan Figure C.10 – Example of the installation of a safety terminal in Japan |
90 | C.11 Subclause 11.3.2 – Japan C.12 Subclause 11.3.3 – Japan C.13 Subclause 12.2 – Japan Figure C.11 – Examples of installation of a lightning protection system in Japan |
91 | C.14 Subclause 12.3 – Finland |
92 | Bibliography |