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AS/NZS 3835.2:2006

Current

Current

The latest, up-to-date edition.

Earth potential rise - Protection of telecommunications network users, personnel and plant Application guide

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Hardcopy , PDF 1 User , PDF 3 Users , PDF 5 Users , PDF 9 Users

Language(s)

English

Published date

27-09-2006

€143.89
Excluding VAT

1 - AS/NZS 3835.2:2006 EARTH POTENTIAL RISE-PROTECTION OF TELECOMMUNICATIONS NETWORK USERS, PERSONNEL AND PLANT...
4 - PREFACE
5 - CONTENTS
7 - SECTION 1 SCOPE AND GENERAL
7 - 1.1 SCOPE
7 - 1.2 APPLICATION
7 - 1.3 REFERENCED DOCUMENTS
9 - SECTION 2 DEFINITIONS
9 - 2.1 DEFINITIONS
9 - 2.1.1 DOG
9 - 2.1.2 Earth grid voltage rise (EGVR)
10 - SECTION 3 EPR AND GENERAL
10 - 3.1 DESCRIPTION OF EPR
11 - 3.2 SOME EPR HAZARD SITUATIONS TO CONSIDER
11 - 3.2.1 Telecommunications cables passing through a hazard zone
12 - 3.2.2 Telecommunications equipment installed inside a building which may have a hazardous EPR on its power earth
15 - 3.2.3 Voltage hazard relevant to telecommunications network
15 - 3.3 CONSIDERATION OF POWER UTILITY CONSTRUCTION PROPOSALS
16 - SECTION 4 EPR HAZARD VOLTAGE LIMITS
16 - 4.1 INTRODUCTION
16 - 4.2 RISK OF EPR HAZARD
17 - 4.3 AUSTRALIAN EPR HAZARD VOLTAGE LIMITS
17 - 4.4 BASIS OF AUSTRALIAN EPR HAZARD VOLTAGE LIMITS
18 - 4.5 NEW ZEALAND EPR HAZARD VOLTAGE LIMITS
19 - 4.6 BASIS OF NEW ZEALAND EPR HAZARD VOLTAGE LIMITS
20 - SECTION 5 ASSESSMENT OF EPR
20 - 5.1 EPR ASSESSMENT PROCESS
21 - 5.2 COMBINED EPR AND LFI EFFECTS
22 - 5.3 HAZARD CALCULATIONS IN SMALL INSTALLATIONS
22 - 5.3.1 General
22 - 5.3.2 EPR calculation
23 - 5.4 ELECTRODES
23 - 5.4.1 General
23 - 5.4.2 Primary electrodes
24 - 5.5 ESTIMATION OF EARTH FAULT CURRENTS
24 - 5.6 SURFACE VOLTAGE GRADIENTS
24 - 5.6.1 Earth resistivity known
25 - 5.6.2 Uncertainties in earth resistivity
26 - 5.7 LIMITS FOR APPLYING THE SIMPLIFIED CALCULATIONS
26 - 5.7.1 General
26 - 5.7.2 Non-hemispherical earthing systems
27 - 5.7.3 Multilayer earth resistivity effects
27 - 5.7.4 Conductors extending the EPR
28 - 5.8 EPR IN LARGE SUBSTATIONS
28 - 5.8.1 General
28 - 5.8.2 EPR calculation
28 - 5.9 EARTH SYSTEM IMPEDANCE
28 - 5.9.1 General
29 - 5.9.2 Aerial conductors
29 - 5.9.3 Underground cables
30 - 5.10 DETERMINATION OF PROSPECTIVE FAULT CURRENT (Initial estimate)
30 - 5.11 COMPUTER ANALYSIS
33 - SECTION 6 FIELD TESTS AND MEASUREMENTS
33 - 6.1 INTRODUCTION
33 - 6.2 OBJECTIVES OF FIELD TESTS
33 - 6.3 METHODOLOGY
33 - 6.4 CURRENT INJECTION TESTS
33 - 6.4.1 General
34 - 6.4.2 50 Hz high-current injection test
35 - 6.4.3 Off-frequency high-current injection test
36 - 6.4.4 Off-frequency low-current injection test
39 - 6.5 SELECTION OF THE APPROPRIATE INJECTION METHOD
40 - 6.6 CURRENT SOURCES
40 - 6.6.1 Maximum value
40 - 6.6.2 50 Hz high-current source
41 - 6.6.3 Off-frequency high-current source
41 - 6.6.4 Off-frequency low-current source
42 - 6.7 REMOTE CURRENT ELECTRODE
42 - 6.7.1 Injection earth electrode
42 - 6.7.2 Potential measurement reference earth electrode
43 - 6.8 MEASURING GRID IMPEDANCE
43 - 6.8.1 Small earthing system
43 - 6.8.2 Tower or conductive pole earth resistance measurement
44 - 6.8.3 Large earthing system (fall of potential method)
45 - 6.9 MEASURING SURFACE VOLTAGE GRADIENTS
49 - 6.10 INTERFERENCE ELIMINATION
49 - 6.10.1 50 Hz standing voltage
49 - 6.10.2 Induced voltages
49 - 6.10.3 D.C. interference
50 - 6.10.4 Harmonic interferences
50 - 6.11 INTERPRETATION OF RESULTS
50 - 6.11.1 Extrapolation to remote earth
53 - 6.12 CONSIDERATION IN CONJUNCTION WITH LOW FREQUENCY INDUCTION (LFI)
54 - 6.13 SAFETY PRECAUTIONS
55 - 6.14 COORDINATION
55 - 6.14.1 Purposes of coordination
55 - 6.14.2 Coordination of tests
55 - 6.15 SOIL RESISTIVITY
55 - 6.15.1 General
57 - 6.16 METHODS OF MEASUREMENT (WENNER AND SCHLUMBERGER ARRAYS)
57 - 6.16.1 Symmetrical line arrays
58 - 6.16.2 Advantages of Wenner array
58 - 6.16.3 Advantages of Schlumberger array
59 - 6.17 RESISTIVITY MEASUREMENT ANALYSIS
59 - 6.17.1 Earth resistivity interpretation procedure
60 - 6.18 INTERPRETATION OF RESISTIVITY MEASUREMENT
61 - 6.19 SOURCES OF ERRORS
61 - 6.20 EQUIPMENT AND INSTRUMENTATION
62 - 6.21 CALIBRATION OF EQUIPMENT
63 - SECTION 7 MITIGATION
63 - 7.1 INTRODUCTION
63 - 7.2 SCOPE OF MITIGATION
63 - 7.3 MITIGATION MEASURES APPLIED TO POWER SYSTEM PLANT
63 - 7.3.1 General
64 - 7.3.2 Design options for minimizing EPR problems
70 - 7.4 LIGHTNING PROTECTION AT TELECOMMUNICATIONS USER™s PREMISES
71 - 7.5 MITIGATION MEASURES APPLIED TO TELECOMMUNICATIONS PLANT
71 - 7.5.1 General
71 - 7.5.2 Telecommunications isolation equipment
77 - 7.5.3 Installation of isolation equipment
80 - 7.5.4 Other mitigation measures that may be applied to telecommunications plant
85 - 7.5.5 Other services entering or leaving a HV site or EPR hazard zone
85 - 7.5.6 HV and LV monitoring, metering, and control equipment using telecommunications services
86 - APPENDIX A - TYPICAL HAZARD ZONES
86 - A1 INTRODUCTION
86 - A2 SCOPE
86 - A3 TYPICAL EXTENT OF HAZARD ZONES
86 - A3.1 For Australia
86 - A3.2 For New Zealand
86 - A4 GUIDELINES FOR INTERPRETATION OF THE TYPICAL HAZARD ZONE
101 - APPENDIX B - EPR DANGER SIGNS-AUSTRALIA ONLY SIGNS FOR HV SITES AND COMMUNICATIONS CABLE PITS/MANHOLES
101 - B1 SCOPE
101 - B2 GENERAL
104 - APPENDIX C - BIBLIOGRAPHY

Specifies recommendation and code of practice for the application of the EPR Code of practice for the protection of persons or plant prescribed in AS/NZS3835.1.

Committee
ET-007
DevelopmentNote
Standard has been given Pending Revision status.
DocumentType
Standard
ISBN
0 7337 7412 1
Pages
99
ProductNote
Pending Revision indicates that as a result of the Aged Standards review process, the document needs updating. If no project proposal, meeting the quality criteria, is received within the 12 month timeframe, the document shall be withdrawn.
PublisherName
Standards Australia
Status
Current
Supersedes

This Standard is a guide to the application of the EPR Code of practice for the protection of persons or plant prescribed in AS/NZS 3835.1. This Standard is intended for personnel responsible for ensuring safety in a telecommunications service environment.

First published as AS/NZS 3835.2:2006.

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