AS 4262.1-1995

Telecommunication overvoltages Protection of persons

Standards Australia

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1 - AS 4262.1-1995 TELECOMMUNICATION OVERVOLTAGES - PROTECTION OF PERSONS
4 - PREFACE
5 - CONTENTS
6 - FOREWORD
7 - SECTION 1 - SCOPE AND GENERAL
7 - 1.1 SCOPE
7 - 1.2 APPLICATION
7 - 1.3 REFERENCED DOCUMENTS
7 - 1.4 DEFINITIONS
7 - 1.4.1 Bonding conductor
8 - 1.4.2 Building
8 - 1.4.3 Carrier
8 - 1.4.4 Customer cabling
8 - 1.4.5 Intermediate distribution frame (IDF)
8 - 1.4.6 Main distribution frame (MDF)
8 - 1.4.7 Overvoltage
8 - 1.4.8 Telecommunication facilities
8 - 1.4.9 Three-electrode gas-filled surge suppression device
8 - 1.4.10 User environment
9 - SECTION 2 - PRINCIPLES
9 - 2.1 GENERAL CONSIDERATIONS FOR PROTECTION
9 - 2.1.1 Overvoltages in the user environment
10 - 2.1.2 Protection concepts
10 - 2.1.3 Protection using an electrical insulation barrier
10 - 2.1.4 Protection using potential equalization
10 - 2.1.5 Effective user protection
11 - 2.2 PROTECTION OF USERS
11 - 2.2.1 Equipment protection
11 - 2.2.2 Additional protection
11 - 2.2.3 Overvoltage reduction
13 - SECTION 3 - ANALYSIS OF PROTECTION AGAINST LIGHTNING OVERVOLTAGES
13 - 3.1 GENERAL
13 - 3.2 FACTORS AFFECTING LIGHTNING INCIDENT PROBABILITY
17 - SECTION 4 - PROTECTION SYSTEMS
18 - SECTION 5 - INSTALLATION METHODS
18 - 5.1 GENERAL
18 - 5.1.1 Surge suppression device installation requirements
18 - 5.1.2 Power earth connectors
18 - 5.1.3 Conductor size
18 - 5.1.4 Bonding methods
18 - 5.2 MDF/ IDF INSTALLATIONS
18 - 5.2.1 Installation
18 - 5.3 DOMESTIC AND NON-MDF/ IDF INSTALLATIONS
18 - 5.3.1 Installation
18 - 5.3.2 Surge suppression device location
18 - 5.4 INSTALLATIONS NOT CONNECTED TO THE SUPPLY AUTHORITY MAINS
18 - 5.4.1 Installation types
19 - 5.4.2 Elements of the installation
22 - APPENDIX A - SOURCES OF OVERVOLTAGE AND MODES OF ENTRY
22 - A1 INTRODUCTION
22 - A2 OVERVOLTAGE DUE TO LIGHTNING
22 - A2.1 Strike to the environment
23 - A2.2 Introduced via telephone lines
23 - A2.3 Introduced via electricity service
23 - A3 POWER SYSTEM DISTURBANCE
24 - A3.1 Electrical contact with power plant
24 - A3.2 Fault currents on HV transmission lines
25 - A3.3 Earth potential rise
25 - A3.4 Switching surges
25 - A3.5 Follow through currents
26 - APPENDIX B - LIGHTNING HAZARDS AND SELF-HELP PROTECTION
26 - B1 LIGHTNING HAZARD
26 - B2 SELF- HELP PROTECTION
26 - B3 FIRST AID

Abstract

Specifies requirements for the protection of users of telecommunication equipment from overvoltages which may exist between a user environment and the telecommunication facilities in that environment. It does not apply to a carrier's network.

Scope

This Standard specifies the requirements for the protection of users of telecommunication equipment from overvoltages which may exist between a user environment and the telecommunication facilities in that environment.

This Standard does not apply to the carriers' networks.

NOTE: See the AUSTEL Technical Standards for the mandatory requirements for the connection of equipment to carriers' networks.