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    AS 3007.2-2004

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    Electrical installations - Surface mines and associated processing plant - General protection requirements

    Available format(s):  Hardcopy, PDF 1 User, PDF 3 Users, PDF 5 Users, PDF 9 Users

    Superseded date:  06-30-2017

    Language(s):  English

    Published date:  01-01-2004

    Publisher:  Standards Australia

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    Table of Contents - (Show below) - (Hide below)

    1 - AS 3007.2-2004 ELECTRICAL INSTALLATIONS-SURFACE MINES AND ASSOCIATED PROCESSING PLANT - GENERAL PROTECTION REQUIREMENTS
    4 - PREFACE
    5 - CONTENTS
    6 - SECTION 1 SCOPE AND REFERENCED DOCUMENTS
    6 - 1.1 SCOPE
    6 - 1.2 REFERENCED DOCUMENTS
    7 - SECTION 2 PROTECTION AGAINST DIRECT CONTACT
    7 - 2.1 INTRODUCTION
    7 - 2.2 GENERAL REQUIREMENTS
    7 - 2.2.1 General
    7 - 2.2.2 Exceptions to the general requirements
    7 - 2.3 COMPLETE PROTECTION BY MEANS OF BARRIERS OR ENCLOSURES
    7 - 2.3.1 General
    8 - 2.3.2 Protection from live parts
    8 - 2.3.3 Strength and stability of barriers and enclosures
    9 - 2.3.4 Access to installation
    10 - 2.4 COMPLETE PROTECTION BY INSULATION OF LIVE PARTS
    10 - 2.4.1 General
    10 - 2.4.2 Degree of insulation
    10 - 2.4.3 Type of insulation
    10 - 2.5 PARTIAL PROTECTION BY PLACING LIVE PARTS OUT OF REACH
    10 - 2.6 PARTIAL PROTECTION BY THE PROVISION OF OBSTACLES
    11 - 2.7 MINIMUM DISTANCES TO BE OBSERVED IN OPERATING AND MAINTENANCE GANGWAYS FOR INDOOR INSTALLATIONS
    11 - 2.7.1 General
    11 - 2.7.2 Minimum distances
    11 - 2.7.3 Minimum width
    11 - 2.7.4 Access
    11 - 2.8 MINIMUM CLEARANCES FOR OUTDOOR INSTALLATIONS
    11 - 2.8.1 Application
    12 - 2.8.2 Minimum clearances to boundary fences
    12 - 2.8.3 Minimum clearances from accessible areas
    12 - 2.8.4 Minimum clearances to barriers
    18 - SECTION 3 PROTECTION AGAINST INDIRECT CONTACT-A.C.
    18 - 3.1 INTRODUCTION
    18 - 3.2 GENERAL
    18 - 3.2.1 Use of protective conductors
    18 - 3.2.2 Automatic disconnection of supply
    19 - 3.2.3 Characteristics of protection
    19 - 3.2.4 Protective measures other than use of protective conductors
    20 - 3.2.5 Distinction of supply to fixed and portable or mobile apparatus
    20 - 3.2.6 Disconnection time for systems above 1000 V
    20 - 3.2.7 Coordination of protection
    20 - 3.2.8 Exemption from use of protective conductors
    20 - 3.3 TN, TT AND IT SYSTEMS DESCRIPTION
    20 - 3.3.1 General
    21 - 3.3.2 Description of the systems
    21 - 3.4 PROTECTIVE MEASURES FOR TN SYSTEMS
    21 - 3.4.1 General
    21 - 3.4.2 Bonding of exposed conductive parts
    26 - 3.4.3 Disconnection following fault
    26 - 3.4.4 Single conductor as combined protective and neutral conductor
    27 - 3.4.5 Interruption of combined protective and neutral conductor
    27 - 3.4.6 Separation of protective conductor from a combined protective and neutral conductor
    27 - 3.4.7 Conductor identification
    27 - 3.4.8 Protective devices
    27 - 3.4.9 Residual-current-operated protective devices
    27 - 3.4.10 Voltage balance
    28 - 3.5 PROTECTIVE MEASURES FOR TT SYSTEMS
    28 - 3.5.1 General
    28 - 3.5.2 Neutral conductor insulation and installation
    28 - 3.5.3 Bonding of exposed conductive parts
    28 - 3.5.4 Conditions to be fulfilled following a fault
    29 - 3.5.5 Protective devices
    29 - 3.6 PROTECTIVE MEASURES FOR IT SYSTEMS
    29 - 3.6.1 General
    29 - 3.6.2 Isolation or earthing of the power system earthable point
    29 - 3.6.3 Neutral conductor insulation and installation
    29 - 3.6.4 Bonding of exposed conductive parts
    29 - 3.6.5 Operation of the protective devices under fault condition
    30 - 3.6.6 Protective devices
    30 - 3.7 REQUIREMENTS FOR EARTH FAULT CURRENT LIMITATION DEVICES
    30 - 3.7.1 General
    30 - 3.7.2 Neutral earthing reactors and arc suppression coils
    31 - 3.7.3 Three-phase earth fault current limiting neutral displacement reactor (zero sequence reactor)
    31 - 3.8 EARTHING ARRANGEMENTS AND PROTECTIVE CONDUCTORS
    31 - 3.8.1 General requirements
    33 - 3.8.2 Earth electrodes.
    34 - 3.8.3 Earthing conductors
    35 - 3.8.4 Main earthing terminals or bars
    35 - 3.8.5 Protective conductors
    38 - 3.8.6 Earthing arrangements for protective purposes
    38 - 3.8.7 Equipotential bonding
    40 - SECTION 4 PROTECTION AGAINST OVERCURRENT
    40 - 4.1 INTRODUCTION
    40 - 4.2 GENERAL RULE
    40 - 4.3 NATURE OF PROTECTIVE DEVICES
    40 - 4.3.1 General
    40 - 4.3.2 Devices ensuring protection against both overload current and short-circuit current
    40 - 4.3.3 Devices ensuring protection against overload current only
    40 - 4.3.4 Devices ensuring protection against short-circuit current only
    41 - 4.4 AUTOMATIC INTERRUPTION-PROTECTION AGAINST OVERCURRENT DUE TO OVERLOAD
    41 - 4.4.1 Conditions of application
    41 - 4.4.2 Rating of protective devices and conductors
    42 - 4.4.3 Arrangement of the overload protective device
    42 - 4.5 AUTOMATIC INTERRUPTION-PROTECTION AGAINST SHORT CIRCUITS
    42 - 4.5.1 Conditions of application
    42 - 4.5.2 Determination of prospective short-circuit currents
    43 - 4.5.3 Operating requirements for short-circuit protection
    44 - 4.5.4 Arrangements of devices for short-circuit protection only
    44 - 4.6 COORDINATION OF OVERLOAD AND SHORT-CIRCUIT PROTECTION
    44 - 4.6.1 Protection afforded by one device
    45 - 4.6.2 Protection afforded by separate devices
    45 - 4.7 LIMITATION OF OVERCURRENT BY CHARACTERISTICS OF SUPPLY OR LOAD
    45 - 4.7.1 Limitation by nature of the load
    45 - 4.7.2 Limitation by nature of the source
    46 - SECTION 5 SELECTION OF PROTECTIVE DEVICES AND PROTECTION SYSTEMS
    46 - 5.1 INTRODUCTION
    46 - 5.2 BASIC REQUIREMENTS
    46 - 5.2.1 Fuses
    46 - 5.2.2 Operating characteristics
    46 - 5.3 SELECTION PROCEDURE
    46 - 5.3.1 Selection of protection systems
    46 - 5.3.2 Selection of devices for protection against short circuits
    47 - 5.3.3 Selection of devices for protection against overload
    47 - 5.3.4 Selection against indirect contact
    47 - 5.4 DISCRIMINATION BETWEEN PROTECTIVE DEVICES
    50 - APPENDIX A - SELECTION OF FACTOR k FOR CALCULATING THE MINIMUM CROSS-SECTIONAL AREA OF PROTECTIVE CONDUCTORS...
    50 - A1 PROCEDURE FOR SELECTING k VALUES
    50 - A2 SUGGESTED INITIAL TEMPERATURES
    51 - A3 SUGGESTED FINAL TEMPERATURES
    53 - APPENDIX B - DESCRIPTION OF CERTAIN TYPES OF PROTECTIVE DEVICES AND THEIR USES
    53 - B1 MEASURING TRANSFORMERS
    53 - B2 RESIDUAL-CURRENT-OPERATED PROTECTIVE DEVICES
    53 - B3 RESIDUAL-VOLTAGE-OPERATED PROTECTIVE DEVICES
    53 - B4 FAULT-VOLTAGE-OPERATED PROTECTIVE DEVICES
    53 - B5 COMBINED RESIDUAL CURRENT/VOLTAGE OPERATED PROTECTIVE DEVICES
    54 - B6 INSULATION MONITORING DEVICES
    54 - B7 DISTANCE RELAYS
    54 - B8 DIFFERENTIAL PROTECTION
    54 - B9 OVERCURRENT-OPERATED PROTECTIVE DEVICES

    Abstract - (Show below) - (Hide below)

    Provides measures which are required for protection against electric shock in normal service from direct contact with live parts, for protection against electric shock from parts which may become live in the case of a fault, and for protection against the effects of overcurrent and fault current resulting from overload or short-circuit conditions. Includes requirements for the selection of protective devices and protection systems.

    Scope - (Show below) - (Hide below)

    This Standard prescribes general protection requirements for electrical installations within the scope of AS 3007.1. It outlines the measures which are required for protection against electric shock in normal service from direct contact with live parts; for protection against electric shock from parts which may become live in the event of a fault (indirect contact); and for protection against the effects of overcurrent resulting from overload or short-circuit conditions.

    General Product Information - (Show below) - (Hide below)

    Committee EL-023
    Document Type Standard
    Publisher Standards Australia
    Status Superseded
    Superseded By
    Supersedes
    Under Revision

    History - (Show below) - (Hide below)

    First published as AS 3007.2-1982.Second edition 1987.Third edition 2004. First published as AS 3007.2-1982. Second edition 1987. Third edition 2004.

    Standards Referenced By This Book - (Show below) - (Hide below)

    AS/NZS 60269.2.0:2000 Low-voltage fuses Supplementary requirements for fuses for use by authorized persons (fuses mainly for industrial application)
    AS/NZS 60269.2.1:2001 Low-voltage fuses Supplementary requirements for fuses for use by authorized persons (fuses mainly for industrial application) - Sections I to V: Examples of types of standardized fuses
    AS 3007.4-2004 Electrical installations - Surface mines and associated processing plant - Additional requirements for specific applications
    AS 60044.1-2007 Instrument transformers Current transformers (IEC 60044-1 Ed.1.2 (2003) MOD)
    AS 60529-2004 Degrees of protection provided by enclosures (IP Code) (Reconfirmed 2018)
    AS 3007.1-2004 Electrical installations - Surface mines and associated processing plant - Scope and definitions
    AS 1243-1982 Voltage transformers for measurement and protection
    AS 1824.1-1995 Insulation co-ordination Definitions, principles and rules
    AS 60269.2.1-2005 Low-voltage fuses Supplementary requirements for fuses for use by authorized persons (fuses mainly for industrial application) - Sections I to VI: Examples of types of standardized fuses
    AS 1824.2-1985 Insulation coordination (phase-to-earth and phase-to-phase, above 1 kV) - Application guide
    AS 60269.2.0-2005 Low-voltage fuses Supplementary requirements for fuses for use by authorized persons (fuses mainly for industrial application) - Sections I to VI: examples of types of standardized fuses
    AS 4436-1996 Guide for the selection of insulators in respect of polluted conditions
    AS 60044.1-2003 Instrument transformer - Current transformers

    Standards Referencing This Book - (Show below) - (Hide below)

    AS/NZS 2081.2:2002 Electrical equipment for coal and shale mines - Electrical protection devices - Earth-continuity monitoring devices
    AS/NZS 2081.5:2002 Electrical equipment for coal and shale mines - Electrical protection devices - Earth-fault current limiters
    AS/NZS 4871.2:2010 Electrical equipment for mines and quarries Distribution, control and auxiliary equipment
    AS/NZS 2081.3:2002 Electrical equipment for coal and shale mines - Electrical protection devices - Earth-leakage protection systems for use on earth-fault current limited systems (IT systems)
    AS 3007.5-2004 Electrical installations - Surface mines and associated processing plant - Operating requirements
    AS/NZS 4871.1:2010 Electrical equipment for mines and quarries General requirements
    AS/NZS 4871.6:2013 Electrical equipment for mines and quarries Diesel powered machinery and ancillary equipment
    AS 1418.1-2002 Cranes, hoists and winches General requirements
    AS 2067-1984 Switchgear assemblies and ancillary equipment for alternating voltages above 1 kV
    AS/NZS 3000:2007 Electrical installations (known as the Australian/New Zealand Wiring Rules)
    AS 3007.3-2004 Electrical installations - Surface mines and associated processing plant - General requirements for equipment and ancillaries
    HB 242-2007 High voltage mining equipment for use underground (Reconfirmed 2019)
    AS 5062-2006 Fire protection for mobile and transportable equipment
    AS 3007.1-2004 Electrical installations - Surface mines and associated processing plant - Scope and definitions
    AS/NZS 4871.1:2012 Electrical equipment for mines and quarries General requirements
    AS 3007.4-2004 Electrical installations - Surface mines and associated processing plant - Additional requirements for specific applications
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