AS/NZS 3835.1:2006

Earth potential rise - Protection of telecommunications network users, personnel and plant Code of practice

Standards Australia

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1 - AS/NZS 3835.1:2006 EARTH POTENTIAL RISE-PROTECTION OF TELECOMMUNICATIONS NETWORK USERS, PERSONNEL AND PLANT - CODE OF...
4 - PREFACE
5 - CONTENTS
7 - FOREWORD
8 - SECTION 1 SCOPE AND GENERAL
8 - 1.1 SCOPE
8 - 1.2 EXCLUSIONS
9 - 1.3 APPLICATION
9 - 1.4 GENERAL
10 - 1.5 REFERENCED DOCUMENTS
12 - SECTION 2 DEFINITIONS
12 - 2.1 DEFINITIONS RELATING TO POWER SYSTEMS
12 - 2.1.1 Distribution substation
12 - 2.1.2 HV site
12 - 2.1.3 Voltage
12 - 2.1.4 Multiple earthed neutral (MEN) system
12 - 2.1.5 Normal operation or ‚normally™
12 - 2.1.6 Overvoltage
12 - 2.1.7 Power utility
13 - 2.1.8 Total stress voltage
13 - 2.2 DEFINITIONS RELATING TO HV CIRCUITS
13 - 2.2.1 Category A circuit
13 - 2.2.2 Category B circuit
13 - 2.2.3 Category C circuit
13 - 2.2.4 High reliability circuit
14 - 2.3 DEFINITIONS RELATING TO HV INSTALLATION EARTHING
14 - 2.3.1 Earthing system and elements
15 - 2.3.2 Grid impedance
15 - 2.3.3 Soil resistivity
15 - 2.4 DEFINITIONS RELATING TO EARTH POTENTIALS
15 - 2.4.1 Earth potential
15 - 2.4.2 Earth potential rise (EPR)
15 - 2.4.3 Hazard zone
15 - 2.4.4 Remote earth
15 - 2.4.5 Standing voltage
15 - 2.4.6 Voltage gradient
16 - 2.5 DEFINITIONS RELATING TO TELECOMMUNICATIONS
16 - 2.5.1 Surge protection device (SPD)
16 - 2.5.2 HV isolating link
16 - 2.5.3 HV isolation device
16 - 2.5.4 Low frequency induction (LFI)
16 - 2.5.5 Main distribution frame (MDF)
16 - 2.5.6 Public switched telephone network (PSTN)
16 - 2.5.7 Telecommunications carrier
16 - 2.5.8 Telecommunications facilities
16 - 2.5.9 Telecommunications network boundary
16 - 2.5.10 Hybrid fibre coax network
17 - SECTION 3 EPR COORDINATION-PRINCIPLES AND PROCEDURES
17 - 3.1 EPR HAZARD INVESTIGATION
17 - 3.2 PLANNING
18 - 3.3 CONSIDERATION OF POWER UTILITY CONSTRUCTION PROPOSALS
18 - 3.3.1 HV sites (excluding distribution substations)
18 - 3.3.2 HV circuits
18 - 3.3.3 Distribution substations and miscellaneous HV earths
19 - 3.4 CONSIDERATION OF TELECOMMUNICATIONS CARRIER CONSTRUCTION PROPOSALS
19 - 3.5 AGREEMENT ON SOLUTION
19 - 3.6 MINIMIZATION OF COSTS
20 - SECTION 4 EPR HAZARD VOLTAGE LIMITS
20 - 4.1 AUSTRALIAN LIMITS
20 - 4.1.1 Australian EPR hazard voltage limits
20 - 4.1.2 Limits for telecommunications exchanges and street located carrier equipment
21 - 4.2 NEW ZEALAND EPR HAZARD VOLTAGE LIMITS
22 - SECTION 5 ASSESSMENT OF EPR
22 - 5.1 INTRODUCTION
22 - 5.2 CONSIDERATION IN CONJUNCTION WITH LOW FREQUENCY INDUCTION (LFI)
23 - SECTION 6 FIELD TESTS AND MEASUREMENTS
23 - 6.1 GENERAL
23 - 6.2 SAFETY PRECAUTIONS
24 - SECTION 7 MITIGATION
24 - 7.1 INTRODUCTION
24 - 7.2 SCOPE OF MITIGATION
24 - 7.3 MITIGATION MEASURES
25 - 7.4 MITIGATION MEASURES APPLIED TO THE POWER SYSTEM PLANT
25 - 7.5 MITIGATION MEASURES APPLIED TO TELECOMMUNICATIONS PLANT
25 - 7.5.1 General
25 - 7.5.2 Mitigation measures for telecommunications plant passing through an EPR hazard zone
26 - 7.5.3 Mitigation measures for telecommunications plant terminating within a HV site or an EPR hazard zone
31 - 7.5.4 Lightning and surge protection for telecommunications equipment at HV sites or within an EPR hazard zone
31 - 7.5.5 Safety equipment and work practices for telecommunications personnel working at a HV site
34 - APPENDIX A - SUBJECTS FOR AGREEMENT BETWEEN POWER UTILITIES AND TELECOMMUNICATIONS CARRIERS
34 - A1 COST OBJECTIVE
34 - A2 ALLOCATION OF COSTS (IN AUSTRALIA)
35 - A3 ALLOCATION OF COSTS (IN NEW ZEALAND)
35 - A4 COST ESTIMATES
36 - APPENDIX B - REQUIREMENTS FOR HV ISOLATION EQUIPMENT
36 - B1 SCOPE
36 - B2 HV ISOLATING LINKS
36 - B2.1 Classification
36 - B2.2 Voltage withstand
36 - B2.3 Accessibility of conductive parts
36 - B3 HV ISOLATION DEVICES
36 - B3.1 Voltage rating
36 - B3.2 Voltage withstand
38 - APPENDIX C - LIST OF ACRONYMS AND ABBREVIATIONS
39 - APPENDIX D - BIBLIOGRAPHY

Abstract

Specifies requirements and code of practice to minimize hazards due to earth potential rise for the protection of telecommunications network users, personnel and plant.