AS/NZS 2290.1:2014
Electrical equipment for coal mines - Introduction, inspection and maintenance - Part 1: For hazardous areas
Sets out requirements for the inspection and maintenance of electrical equipment designed for use in hazardous areas in and around underground coal mines. It provides general requirements that are fundamental to the safe use of electrical equipment in hazardous areas, and provides specific requirements for each type of explosion-protection technique. This standard is intended to be applied where there is a potential risk due to the presence of explosive gas, dust mixtures and combustible dust layers, and is part of a series of Standards on the maintenance and overhaul of electrical equipment used in association with underground mining machines.
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AS/NZS 2290.1:2014 ELECTRICAL EQUIPMENT FOR COAL MINES-INTRODUCTION, INSPECTION AND MAINTENANCE - FOR HAZARDOUS AREAS
PREFACE
CONTENTS
FOREWORD
SECTION 1 SCOPE AND GENERAL
1.1 SCOPE
1.2 NORMATIVE REFERENCES
1.3 DEFINITIONS
1.3.1 Certificate
1.3.2 Competent person
1.3.3 Defect management scheme
1.3.4 Electrical engineering manager
1.3.5 Fixed plant/equipment
1.3.6 Hazardous area (explosion risk zone)
1.3.7 Inspection
1.3.8 Inspection, external
1.3.9 Inspection, initial
1.3.10 Inspection, internal
1.3.11 Inspection, pre-overhaul
1.3.12 Inspection, periodic
1.3.13 Inspection report
1.3.14 Inspection, sample
1.3.15 Life cycle
1.3.16 Maintenance
1.3.17 Mobile plant/equipment
1.3.18 Modification
1.3.19 Non-hazardous area (negligible explosion risk zone)
1.3.20 Portable equipment
1.3.21 Readily accessible component
1.3.22 Transportable plant/equipment
1.3.23 Verification dossier
SECTION 2 GENERAL REQUIREMENTS
2.1 LIFE CYCLE MANAGEMENT
2.2 DOCUMENTATION
2.2.1 General
2.2.2 Verification dossier
2.2.3 Additional documentation
2.3 COMPETENCY
2.3.1 Competent persons
2.3.2 Electrical engineering manager
2.4 INSPECTIONS
2.4.1 General
2.4.2 Determining accessibility for inspection of components
2.4.3 Types of inspection
2.5 INITIAL INSPECTION REQUIREMENTS
2.6 PERIODIC INSPECTION REQUIREMENTS
2.6.1 General
2.6.2 Frequency of inspection
2.6.3 Portable equipment
2.6.4 Fixed installations
2.6.5 Transportable and mobile equipment
2.7 PRE-OVERHAUL AUDIT REQUIREMENTS
2.7.1 General
2.7.2 Examination
2.7.3 Equipment not included in pre-overhaul audit
2.8 MAINTENANCE REQUIREMENTS
2.8.1 Repair and alterations to equipment
2.8.2 Maintenance of flexible cables entering enclosures
2.8.3 Repair in situ
2.8.4 Withdrawal from service
2.8.5 Fastenings and tools
2.9 ENVIRONMENTAL CONDITIONS
2.10 ISOLATION OF EQUIPMENT
2.10.1 Installations other than intrinsically safe circuits
2.10.2 Intrinsically safe installations
2.11 EARTHING AND EQUIPOTENTIAL BONDING
2.12 SPECIFIC CONDITIONS OF USE
2.13 MOBILE, PORTABLE AND TRANSPORTABLE EQUIPMENT AND ITS CONNECTIONS
2.14 GENERAL INSPECTION REQUIREMENTS
2.14.1 General
2.14.2 Equipment is appropriate to the requirements of the location
2.14.3 Equipment maximum surface temperature
2.14.4 Equipment circuit identification
2.14.5 Cable gland
2.14.6 Cables, plugs and couplers
2.14.7 Fault loop impedance or earthing resistance
2.14.8 Insulation resistance
2.14.9 Electrical protection devices
SECTION 3 SPECIFIC INSPECTION REQUIREMENTS
3.1 GENERAL
3.2 TYPE OF PROTECTION ‘d’—FLAMEPROOF ENCLOSURE
3.2.1 Flameproof joints
3.2.2 Periodic inspection-External inspection
3.2.3 Periodic inspection-Internal inspection
3.2.4 Pre-overhaul audit
3.3 TYPE OF PROTECTION ‘e’—INCREASED SAFETY
3.3.1 General
3.3.2 Enclosures
3.3.3 Overloads
3.3.4 Replacement parts
3.3.5 Periodic inspection-External inspection
3.3.6 Periodic inspection-Internal inspection
3.4 TYPE OF PROTECTION ‘i’—INTRINSIC SAFETY
3.4.1 General
3.4.2 Enclosures
3.4.3 Labelling
3.4.4 System configuration and entity parameters
3.4.5 Repairs and unauthorized modifications
3.4.6 Replacement parts and attachments
3.4.7 Associated apparatus (safety interface) between intrinsically safe and non-intrinsically safe circuits
3.4.8 Cables
3.4.9 Cable screens
3.4.10 Point-to-point connections
3.4.11 Earth continuity of non-galvanically isolated circuits
3.4.12 Intrinsically safe circuit earthing and insulation
3.4.13 Separation between intrinsically safe and non-intrinsically safe circuits
3.4.14 Inspection schedule
3.5 TYPE OF PROTECTION ‘p’—PRESSURIZED ENCLOSURE
3.6 TYPE OF PROTECTION ‘m’—ENCAPSULATION
3.7 TYPE OF PROTECTION ‘o’—OIL-IMMERSION
3.8 TYPE OF PROTECTION ‘q’—POWDER-FILLING
3.9 TYPE OF PROTECTION ‘s’—SPECIAL PROTECTION
3.10 EXPLOSION PROTECTED CAPLIGHTS
APPENDIX A - INSPECTION FLOWCHART
APPENDIX B - CORROSION OR SURFACE INDENTATION TOLERANCES
APPENDIX C - TYPICAL METHOD FOR TEMPORARY, IN SITU REPAIR OF A DAMAGED HOLE OR THREAD IN A FLAMEPROOF ENCLOSURE
APPENDIX D - DOCUMENTATION CHECK SHEET-TYPICAL FORMAT
APPENDIX E - TYPICAL EXTERNAL INSPECTION REPORT FORM Ex 'd'
APPENDIX F - TYPICAL INTERNAL INSPECTION REPORT FORM Ex 'd'
APPENDIX G - TYPICAL EXTERNAL INSPECTION REPORT FORM Ex 'e'
APPENDIX H - TYPICAL INTERNAL INSPECTION REPORT FORM Ex 'e'
APPENDIX I - TYPICAL EXTERNAL INSPECTION REPORT FORM Ex 'i'
APPENDIX J - TYPICAL INTERNAL INSPECTION REPORT FORM Ex 'i'
APPENDIX K - TYPICAL EXTERNAL INSPECTION REPORT FORM Ex 'p'
APPENDIX L - TYPICAL PRE-OVERHAUL AUDIT REPORT SHEET
APPENDIX M - INTRODUCTION OF AN ALTERNATIVE RISK ASSESSMENT METHOD ENCOMPASSING 'EQUIPMENT PROTECTION LEVELS' FOR Ex...
M1 INTRODUCTION
M2 HISTORICAL BACKGROUND
M2.1 General
M2.2 Group I
M2.3 Group II and III
M3 GENERAL
M3.1 Introduction
M3.2 Mines susceptible to firedamp (Group I)
M3.3 Gases (Group II)
M3.4 Dusts (Group III)
M4 RISK IGNITION PROTECTION AFFORDED
M5 IMPLEMENTATION
BIBLIOGRAPHY
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AS/NZS 2290.1:2014 ELECTRICAL EQUIPMENT FOR COAL MINES-INTRODUCTION, INSPECTION AND MAINTENANCE - FOR HAZARDOUS AREAS
PREFACE
CONTENTS
FOREWORD
SECTION 1 SCOPE AND GENERAL
1.1 SCOPE
1.2 NORMATIVE REFERENCES
1.3 DEFINITIONS
1.3.1 Certificate
1.3.2 Competent person
1.3.3 Defect management scheme
1.3.4 Electrical engineering manager
1.3.5 Fixed plant/equipment
1.3.6 Hazardous area (explosion risk zone)
1.3.7 Inspection
1.3.8 Inspection, external
1.3.9 Inspection, initial
1.3.10 Inspection, internal
1.3.11 Inspection, pre-overhaul
1.3.12 Inspection, periodic
1.3.13 Inspection report
1.3.14 Inspection, sample
1.3.15 Life cycle
1.3.16 Maintenance
1.3.17 Mobile plant/equipment
1.3.18 Modification
1.3.19 Non-hazardous area (negligible explosion risk zone)
1.3.20 Portable equipment
1.3.21 Readily accessible component
1.3.22 Transportable plant/equipment
1.3.23 Verification dossier
SECTION 2 GENERAL REQUIREMENTS
2.1 LIFE CYCLE MANAGEMENT
2.2 DOCUMENTATION
2.2.1 General
2.2.2 Verification dossier
2.2.3 Additional documentation
2.3 COMPETENCY
2.3.1 Competent persons
2.3.2 Electrical engineering manager
2.4 INSPECTIONS
2.4.1 General
2.4.2 Determining accessibility for inspection of components
2.4.3 Types of inspection
2.5 INITIAL INSPECTION REQUIREMENTS
2.6 PERIODIC INSPECTION REQUIREMENTS
2.6.1 General
2.6.2 Frequency of inspection
2.6.3 Portable equipment
2.6.4 Fixed installations
2.6.5 Transportable and mobile equipment
2.7 PRE-OVERHAUL AUDIT REQUIREMENTS
2.7.1 General
2.7.2 Examination
2.7.3 Equipment not included in pre-overhaul audit
2.8 MAINTENANCE REQUIREMENTS
2.8.1 Repair and alterations to equipment
2.8.2 Maintenance of flexible cables entering enclosures
2.8.3 Repair in situ
2.8.4 Withdrawal from service
2.8.5 Fastenings and tools
2.9 ENVIRONMENTAL CONDITIONS
2.10 ISOLATION OF EQUIPMENT
2.10.1 Installations other than intrinsically safe circuits
2.10.2 Intrinsically safe installations
2.11 EARTHING AND EQUIPOTENTIAL BONDING
2.12 SPECIFIC CONDITIONS OF USE
2.13 MOBILE, PORTABLE AND TRANSPORTABLE EQUIPMENT AND ITS CONNECTIONS
2.14 GENERAL INSPECTION REQUIREMENTS
2.14.1 General
2.14.2 Equipment is appropriate to the requirements of the location
2.14.3 Equipment maximum surface temperature
2.14.4 Equipment circuit identification
2.14.5 Cable gland
2.14.6 Cables, plugs and couplers
2.14.7 Fault loop impedance or earthing resistance
2.14.8 Insulation resistance
2.14.9 Electrical protection devices
SECTION 3 SPECIFIC INSPECTION REQUIREMENTS
3.1 GENERAL
3.2 TYPE OF PROTECTION ‘d’—FLAMEPROOF ENCLOSURE
3.2.1 Flameproof joints
3.2.2 Periodic inspection-External inspection
3.2.3 Periodic inspection-Internal inspection
3.2.4 Pre-overhaul audit
3.3 TYPE OF PROTECTION ‘e’—INCREASED SAFETY
3.3.1 General
3.3.2 Enclosures
3.3.3 Overloads
3.3.4 Replacement parts
3.3.5 Periodic inspection-External inspection
3.3.6 Periodic inspection-Internal inspection
3.4 TYPE OF PROTECTION ‘i’—INTRINSIC SAFETY
3.4.1 General
3.4.2 Enclosures
3.4.3 Labelling
3.4.4 System configuration and entity parameters
3.4.5 Repairs and unauthorized modifications
3.4.6 Replacement parts and attachments
3.4.7 Associated apparatus (safety interface) between intrinsically safe and non-intrinsically safe circuits
3.4.8 Cables
3.4.9 Cable screens
3.4.10 Point-to-point connections
3.4.11 Earth continuity of non-galvanically isolated circuits
3.4.12 Intrinsically safe circuit earthing and insulation
3.4.13 Separation between intrinsically safe and non-intrinsically safe circuits
3.4.14 Inspection schedule
3.5 TYPE OF PROTECTION ‘p’—PRESSURIZED ENCLOSURE
3.6 TYPE OF PROTECTION ‘m’—ENCAPSULATION
3.7 TYPE OF PROTECTION ‘o’—OIL-IMMERSION
3.8 TYPE OF PROTECTION ‘q’—POWDER-FILLING
3.9 TYPE OF PROTECTION ‘s’—SPECIAL PROTECTION
3.10 EXPLOSION PROTECTED CAPLIGHTS
APPENDIX A - INSPECTION FLOWCHART
APPENDIX B - CORROSION OR SURFACE INDENTATION TOLERANCES
APPENDIX C - TYPICAL METHOD FOR TEMPORARY, IN SITU REPAIR OF A DAMAGED HOLE OR THREAD IN A FLAMEPROOF ENCLOSURE
APPENDIX D - DOCUMENTATION CHECK SHEET-TYPICAL FORMAT
APPENDIX E - TYPICAL EXTERNAL INSPECTION REPORT FORM Ex 'd'
APPENDIX F - TYPICAL INTERNAL INSPECTION REPORT FORM Ex 'd'
APPENDIX G - TYPICAL EXTERNAL INSPECTION REPORT FORM Ex 'e'
APPENDIX H - TYPICAL INTERNAL INSPECTION REPORT FORM Ex 'e'
APPENDIX I - TYPICAL EXTERNAL INSPECTION REPORT FORM Ex 'i'
APPENDIX J - TYPICAL INTERNAL INSPECTION REPORT FORM Ex 'i'
APPENDIX K - TYPICAL EXTERNAL INSPECTION REPORT FORM Ex 'p'
APPENDIX L - TYPICAL PRE-OVERHAUL AUDIT REPORT SHEET
APPENDIX M - INTRODUCTION OF AN ALTERNATIVE RISK ASSESSMENT METHOD ENCOMPASSING 'EQUIPMENT PROTECTION LEVELS' FOR Ex...
M1 INTRODUCTION
M2 HISTORICAL BACKGROUND
M2.1 General
M2.2 Group I
M2.3 Group II and III
M3 GENERAL
M3.1 Introduction
M3.2 Mines susceptible to firedamp (Group I)
M3.3 Gases (Group II)
M3.4 Dusts (Group III)
M4 RISK IGNITION PROTECTION AFFORDED
M5 IMPLEMENTATION
BIBLIOGRAPHY
Previous versions
AS/NZS 2290.1:2014
Online Library subscription information
Online library subscriptions provide a cost-effective solution for organisations of any size to access the latest standards, offering 24/7 access to a personalised catalogue. The service ensures subscribers have have the most up-to-date version of selected standards, incluing automatic updates for any amendments or versions. Pricing is dependent on the chosen standards and the number of concurrent users, with discounts applied from the standards PDF price. For customised subscriptions or further inquiries, contact the Online Library team.