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  • AS 2380.7-1987

    Withdrawn A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
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    Electrical equipment for explosive atmospheres - Explosion-protection techniques - Intrinsic safety i

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

    Withdrawn date:  24-06-2021

    Language(s):  English

    Published date:  01-01-1987

    Publisher:  Standards Australia

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

    1 - AS 2380.7-1987 ELECTRICAL EQUIPMENT FOR EXPLOSIVE ATMOSPHERES - EXPLOSION-PROTECTION TECHNIQUES - INTRINSIC SAFETY i
    4 - PREFACE
    5 - CONTENTS
    7 - SECTION 1. SCOPE AND GENERAL
    7 - 1.1 SCOPE.
    7 - 1.2 REFERENCED DOCUMENTS.
    7 - 1.3 DEFINITIONS.
    7 - 1.3.1 Associated electrical equipment
    8 - 1.3.2 Electrical equipment
    8 - 1.3.3 Fault
    8 - 1.3.4 Infallible component or infallible assembly of components
    8 - 1.3.5 Intrinsically safe circuit
    8 - 1.3.6 Intrinsically safe electrical equipment
    8 - 1.3.7 Intrinsically safe electrical system
    8 - 1.3.8 Normal operation
    8 - 1.3.9 Self-revealing fault
    8 - 1.4 GROUPING AND CLASSIFICATION.
    8 - 1.5 TEMPERATURES.
    8 - 1.6 CATEGORIES.
    8 - 1.6.1 General requirements.
    8 - 1.6.2 Category ‘ia’.
    8 - 1.6.3 Category ‘ib’.
    8 - 1.7 SAFETY FACTORS.
    8 - 1.8 CERTIFICATION.
    10 - SECTION 2. CONSTRUCTIONAL REQUIREMENTS
    10 - 2.1 GENERAL REQUIREMENTS.
    10 - 2.2 WIRING.
    10 - 2.3 MOUNTING OF COMPONENTS.
    10 - 2.4 OUTER ENCLOSURES.
    10 - 2.5 FACILITIES FOR CONNECTION OF EXTERNAL CIRCUITS.
    10 - 2.5.1 Terminals.
    10 - 2.5.2 Plugs and sockets.
    12 - 2.6 CLEARANCES, CREEPAGE DISTANCES, AND DISTANCES THROUGH CASTING COMPOUND AND INSULATIONS.
    12 - 2.6.1 General.
    12 - 2.6.2 Assessment.
    12 - 2.6.3 Printed circuits.
    12 - 2.6.4 Relays.
    12 - 2.6.5 Encapsulation.
    12 - 2.7 EARTHING.
    13 - 2.8 INSULATION.
    13 - 2.8.1 Segregated circuits.
    13 - 2.8.2 Non-segregated circuits.
    13 - 2.8.3 Inductive or capacitive interference.
    13 - 2.8.4 Separation.
    13 - 2.9 INTRINSICALLY SAFE ELECTRICAL SYSTEMS.
    13 - 2.9.1 General.
    13 - 2.9.2 External parameters.
    13 - 2.9.3 Multicore cables in Zone 1.*
    13 - 2.9.4. Multicore cables in Zone 0.*
    15 - 2.9.5 Fibre optic cable.
    15 - 2.10 PIEZO-ELECTRIC DEVICES.
    16 - SECTION 3. REQUIREMENTS FOR COMPONENTS
    16 - 3.1 COMPONENTS ON WHICH INTRINSIC SAFETY DEPENDS.
    16 - 3.1.1 Rating of components.
    16 - 3.1.2 Connectors for internal connections, plug-in cards and components
    16 - 3.1.3 Cells and batteries.
    16 - 3.1.4 Semiconductors.
    16 - 3.2 INFALLIBLE COMPONENTS AND INFALLIBLE ASSEMBLIES OF COMPONENTS.
    16 - 3.2.1 General.
    16 - 3.2.2 Mains transformers.
    18 - 3.2.3 Transformers other than mains transformers
    18 - 3.2.4 Damping windings.
    18 - 3.2.5 Current-limiting resistors.
    18 - 3.2.6 Fuse-protected resistors.
    18 - 3.2.7 Capacitors.
    18 - 3.2.8 Safety shunts.
    18 - 3.2.9 Optical coupling devices.
    19 - SECTION 4. REQUIREMENTS FOR SAFETY BARRIERS
    19 - 4.1 GENERAL.
    19 - 4.2 PROVISION OF DIODES.
    19 - 4.3 EARTHING.
    19 - 4.4 PROTECTIVE MEASURES.
    19 - 4.5 RATING OF BARRIER COMPONENTS.
    19 - 4.5.1 General.
    19 - 4.5.2 Barriers protected by resistors.
    19 - 4.5.3 Barriers protected by fuses.
    19 - 4.6 CONSTRUCTION.
    19 - 4.6.1 Provision for mounting.
    19 - 4.6.2 Facilities for connection to earth.
    19 - 4.6.3 Separation of connection facilities.
    19 - 4.6.4 Protection of components.
    19 - 4.7 ROUTINE TESTS.
    19 - 4.7.1 Completed barriers.
    19 - 4.7.2 Diodes for 2-diode ‘ia’ barriers.
    20 - SECTION 5. TYPE TESTS FOR ELECTRICAL EQUIPMENT
    20 - 5.1 GENERAL.
    20 - 5.2 SPARK TEST APPARATUS.
    20 - 5.3 TEST MIXTURES.
    20 - 5.4 CALIBRATION OF THE SPARK TEST APPARATUS
    20 - 5.5 TESTS WITH THE SPARK TEST APPARATUS.
    20 - 5.5.1 Procedure.
    20 - 5.5.2 Safety factors.
    21 - 5.5.3 Result of spark tests.
    21 - 5.6 VOLTAGE TEST.
    21 - 5.7 IMPACT TEST.
    22 - SECTION 6. MARKING
    22 - 6.1 MARKING OF ELECTRICAL EQUIPMENT.
    22 - 6.2 MARKING OF DIODE SAFETY BARRIERS.
    22 - 6.3 MARKING OF CONNECTION FACILITIES.
    22 - 6.4 MARKING OF INTEGRATED INTRINSICALLY SAFE SYSTEMS
    22 - 6.5 EXAMPLES OF MARKING.
    22 - 6.5.1 Self-contained equipment.
    22 - 6.5.2 Entity concept equipment.
    22 - 6.5.3 Integrated systems.
    22 - 6.5.4 Diode safety barriers.
    22 - 6.5.5 Associated electrical equipment protected by an Ex d enclosure.
    23 - APPENDIX A - GUIDANCE ON DESIGN AND ASSESSMENT OF INTRINSICALLY SAFE CIRCUITS
    23 - A1 INTRODUCTION.
    23 - A2 REFERENCE CURVES.
    23 - A3 PROCEDURE.
    23 - A4 LIMITATIONS IN APPLICATION.
    24 - A5 EFFECT OF EXTERNAL INTERCONNECTING CABLES.
    24 - A6 EXAMPLES.
    24 - A6.1 Simple inductive circuit.
    25 - A6.2 Simple capacitive circuit.
    37 - APPENDIX B - GUIDANCE ON DESIGN AND ASSESSMENT OF SHUNT DIODE SAFETY BARRIERS
    37 - B1 INTRODUCTION.
    37 - B2 TYPICAL DESIGNS.
    37 - B3 FUSE DATA.
    40 - B4 EXTERNAL PARAMETERS.
    44 - APPENDIX C - DETERMINATION OF EXTERNAL PARAMETERS
    44 - C1 CERTIFICATION METHODS.
    44 - C2 PARAMETERS TO BE DEFINED.
    44 - C2.1 Entity concept intrinsically safe equipment.
    44 - C2.2 Certified intrinsically safe systems.
    44 - C3 CALCULATION OF PARAMETERS.
    44 - C3.1 General.
    44 - C3.2 Output parameters.
    46 - C3.3 Input parameters.
    46 - C3.4 Cable parameters.

    Abstract - (Show below) - (Hide below)

    Specifies design, construction and testing requirements for intrinsically safe electrical equipment for use in explosive atmospheres. Includes requirements for self-contained equipment, equipment forming a part of a system (entity concept equipment) and integrated systems. Also covers shunt diode safety barriers and other associated equipment intended for installation in a safe area. An appendix provides guidelines on the design and assessment of intrinsically safe circuits. Technically similar to IEC 79-11.

    Scope - (Show below) - (Hide below)

    This standard specifies requirements for intrinsically safe electrical equipment and systems, type of protection i, intended for use in explosive atmospheres.This standard supplements AS 2380, Part 1, except for the following requirements which do not apply:(a) For intrinsically safe equipment and associated equipment:Clause 2.1.4(b) Access to uninsulated live partsClause 2.4.2 Special fastenersClause 2.5 Interlocking devicesClause 2.6 Bushings and terminal studsClause 2.7 Materials used for cementing and sealingClause 2.8 ConnectionsClause 2.12 Cable and conduit entriesSection 3 Supplementary requirements for certain electrical equipmentClause 5.2.1 Impact testClause 5.2.3 Rubbing of moving partsClause 5.4 Torque test for bushings(b) For associated electrical equipment:Clause 2.2 Plastics enclosuresClause 2.3 Light alloy enclosuresClause 5.5 Temperature rise testClause 5.6 Thermal shock testClause 5.7 Insulation resistance test of parts of enclosures of plastics materialsWhere associated electrical equipment is protected by a type of explosion-protection other than intrinsic safety, the requirements of the applicable standard for that type of protection shall apply.This standard applies also to electrical equipment or parts of electrical equipment located outside the explosive atmosphere or protected by another type of explosion-protection, where the intrinsic safety of the electrical circuits in the explosive atmosphere may depend upon the design and construction of such electrical equipment or parts of such electrical equipment.NOTE: The permitted methods of interconnection of intrinsically safe electrical equipment and associated electrical equipment are specified in AS 1076, Part 4.

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

    Committee EL-014
    Document Type Standard
    Publisher Standards Australia
    Status Withdrawn
    Superseded By
    Supersedes

    History - (Show below) - (Hide below)

    Superseded on 28 February 2005

    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 2865-1995 Safe working in a confined space
    AS 1915-1992 Electrical equipment for explosive atmospheres - Battery-operated vehicles (Reconfirmed 2013)
    AS 2290.2-1993 Electrical equipment for coal mines - Maintenance and overhaul - Overhaul and repair of electrical equipment for hazardous areas
    AS 1681-2002 Safety requirements for electrically heated Type 1 ovens in which flammable volatiles occur
    AS 2381.1-1991 Electrical equipment for explosive atmospheres - Selection, installation and maintenance - General requirements
    AS 2381.10-1995 Electrical equipment for explosive atmospheres - Selection, installation and maintenance - Equipment in combustible dust (Class II) areas
    AS 3765.1-1990 Clothing for protection against hazardous chemicals - Protection against general or specific chemicals
    AS 1972-1991 Electric cables - Underground coal mines - Other than reeling and trailing cables
    AS 2192-1991 Sterilizers - Steam - Downward displacement
    AS/NZS 1716:1994 Respiratory protective devices
    AS 3640-2004 Workplace atmospheres - Method for sampling and gravimetric determination of inhalable dust
    AS/NZS 2290.1:2005 Electrical equipment for coal mines - Introduction and maintenance - For hazardous areas
    AS/NZS 1716:2003 Respiratory protective devices
    SAA HB 9-1994 Occupational personal protection
    AS/NZS 3584.3:2005 Diesel engine systems for underground coal mines - Maintenance
    AS/NZS 1715:1994 Selection, use and maintenance of respiratory protective devices
    AS/NZS 3800:2005 Electrical equipment for explosive atmospheres - Repair and overhaul
    HB 213:2003 Guidelines for safe working in a confined space
    AS/NZS 3788:1996 Pressure equipment - In-service inspection
    AS/NZS 3800:1997 Electrical equipment for explosive atmospheres - Overhaul and repair
    AS 2380.9-1991 Electrical equipment for explosive atmospheres - Explosion-protection techniques Type of protection n - Non-sparking
    AS 2989-1992 Electrical equipment for coal mines - Specific requirements for high voltage circuit-breakers and disconnectors
    AS 2192-2002 Sterilizers - Steam - Downward-displacement
    AS/NZS 2865:2001 Safe working in a confined space
    AS 3007.3-2004 Electrical installations - Surface mines and associated processing plant - General requirements for equipment and ancillaries
    AS/NZS 2381.1:2005 Electrical equipment for explosive gas atmospheres - Selection, installation and maintenance - General requirements
    AS 1755-2000 Conveyors - Safety requirements
    AS 2361-1990 Freight containers - Automatic identification - Operating parameters
    AS/NZS 4783.2:2002 Performance of electrical lighting equipment - Ballasts for fluorescent lamps Energy labelling and minimum energy performance standards requirements (Reconfirmed 2013)
    AS/NZS 1972:2002 Electric cables - Underground coal mines - Other than reeling and trailing
    AS 2381.7-1989 Electrical equipment for explosive atmospheres - Selection, installation and maintenance - Intrinsic safety i
    AS 2595.1-1992 Electrical equipment for coal mines - Electrical requirements for underground mining machines and accessories - Equipment for use in hazardous areas
    AS/NZS 4871.3:2002 Electrical equipment for coal mines, for use underground Substations
    AS 3846-1998 The handling and transport of dangerous cargoes in port areas
    AS 1670.2-1997 Fire detection, warning, control and intercom systems - System design, installation and commissioning - Local fire
    HB 13-2000 Electrical equipment for hazardous areas
    MP 69-1993 Explosion-protected electrical equipment - Certification scheme - Policy
    AS/NZS 60079.14:2009 Explosive atmospheres Electrical installations design, selection and erection (IEC 60079-14, Ed. 4.0 (2007) MOD)
    AS/NZS 3788:2001 Pressure equipment - In-service inspection
    AS 2985-2004 Workplace atmospheres - Method for sampling and gravimetric determination of respirable dust
    AS/NZS 2081.4:2002 Electrical equipment for coal and shale mines - Electrical protection devices - Lockout earth-fault protection devices
    AS 3007.4-2004 Electrical installations - Surface mines and associated processing plant - Additional requirements for specific applications
    AS/NZS 1972:1996 Electric cables - Underground coal mines - Other than reeling and trailing
    AS 1716-1991 Respiratory protective devices
    SAA HB37.2-1993 Handbook of Australian fire Standards Electrical equipment (Reconfirmed 2016)
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