AS/NZS 4871.1:2002

1 - AS/NZS 4871.1:2002 ELECTRICAL EQUIPMENT FOR COAL MINES, FOR USE UNDERGROUND - GENERAL REQUIREMENTS
4 - PREFACE
5 - CONTENTS
6 - SECTION 1 SCOPE AND GENERAL
6 - 1.1 SCOPE
6 - 1.2 APPLICATION
6 - 1.3 SERVICE CONDITIONS
7 - 1.4 REFERENCED DOCUMENTS
8 - 1.5 DEFINITIONS
8 - 1.5.1 Access cover
8 - 1.5.2 Adaptor
8 - 1.5.3 Approved
8 - 1.5.4 Area, hazardous
8 - 1.5.5 Area, non-hazardous (safe)
8 - 1.5.6 Automatic circuit opening device
8 - 1.5.7 Automatic control
8 - 1.5.8 Cable attachments
9 - 1.5.9 Cable entry
9 - 1.5.10 Certifying authority
9 - 1.5.11 Circuit-breaker
9 - 1.5.12 Clearance
9 - 1.5.13 Conduit entry
9 - 1.5.14 Connection facilities
9 - 1.5.15 Contactor
9 - 1.5.16 Cover
9 - 1.5.17 Creepage distance
9 - 1.5.18 Dead front
9 - 1.5.19 Disconnector (Isolating switch)
9 - 1.5.20 Distribution, control box and auxiliary equipment
9 - 1.5.21 Earth-continuity protection
9 - 1.5.22 Earth-fault current limitation
9 - 1.5.23 Earth-fault lockout protection
10 - 1.5.24 Earth-fault protection
10 - 1.5.25 Electrical equipment
10 - 1.5.26 Electrical equipment for explosive gas atmospheres
10 - 1.5.27 Enclosure
10 - 1.5.28 Ex component
10 - 1.5.29 Explosion-protected
10 - 1.5.30 Explosion-protection
10 - 1.5.31 Explosive atmosphere
10 - 1.5.32 Fail-to-safety (fail-safe)
10 - 1.5.33 Fixed equipment
10 - 1.5.34 Flameproof enclosure
11 - 1.5.35 Flame resistant
11 - 1.5.36 Fuse, HRC
11 - 1.5.37 Ignition temperature
11 - 1.5.38 Interlocking device
11 - 1.5.39 Intrinsically safe circuit
11 - 1.5.40 Inverse time-delay overcurrent release
11 - 1.5.41 Local control
11 - 1.5.42 Maximum surface temperature
11 - 1.5.43 Mobile machine
11 - 1.5.44 Overcurrent and short-circuit protection
11 - 1.5.45 Overload protection
11 - 1.5.46 Pilot core
12 - 1.5.47 Portable equipment
12 - 1.5.48 Prospective peak current
12 - 1.5.49 Rated conditional short-circuit current
12 - 1.5.50 Rated peak withstand current
12 - 1.5.51 Rated prospective short-circuit current
12 - 1.5.52 Rated short-time withstand current
12 - 1.5.53 Rating
12 - 1.5.54 Regulatory authority
12 - 1.5.55 Relevant Standards
12 - 1.5.56 Remote control
12 - 1.5.57 Restrained plug and receptacle
12 - 1.5.58 Sensitive earth-fault protection
12 - 1.5.59 Sequence interlocking
12 - 1.5.60 Shunt release
13 - 1.5.61 Switching device
13 - 1.5.62 Temperature classification
13 - 1.5.63 Terminal compartment
13 - 1.5.64 Testing station
13 - 1.5.65 Transportable equipment
13 - 1.5.66 Transportable substation
13 - 1.5.67 Undervoltage release
13 - 1.5.68 Voltage
14 - SECTION 2 COMMON REQUIREMENTS
14 - 2.1 GENERAL
14 - 2.1.1 Safety appraisal
14 - 2.1.2 Supply system
14 - 2.1.3 System fault levels
14 - 2.1.4 Equipment selection
14 - 2.1.5 Temperature rating
15 - 2.1.6 Assembly
15 - 2.1.7 Construction
15 - 2.2 ENCLOSURE REQUIREMENTS
15 - 2.2.1 General
15 - 2.2.2 Internal segregation
15 - 2.2.3 Access
16 - 2.2.4 Withdrawable and plug-in equipment
16 - 2.2.5 Unused openings and threaded entries
16 - 2.2.6 Electric shock interlocking
17 - 2.3 COMPONENTS REQUIREMENTS
17 - 2.3.1 General
17 - 2.3.2 Switching devices
19 - 2.3.3 Transformers
20 - 2.3.4 Measuring instruments
20 - 2.3.5 Terminals
20 - 2.3.6 Cable attachments
20 - 2.3.7 Motors
20 - 2.3.8 Resistors
21 - 2.3.9 Electronic based systems
21 - 2.4 CONDUCTORS AND CABLING REQUIREMENTS
21 - 2.4.1 Conductor insulation
21 - 2.4.2 Earthing conductors
22 - 2.4.3 Neutral earthing conductor
22 - 2.4.4 Power conductors
22 - 2.4.5 Control, protection and auxiliary conductors
22 - 2.4.6 Intrinsically safe conductors
22 - 2.4.7 Internal wiring
23 - 2.4.8 Cables
23 - 2.5 CONNECTION FACILITIES FOR EARTHING OR BONDING CONDUCTORS
23 - 2.5.1 General
23 - 2.5.2 Circuits containing voltages below 50V to earth
24 - 2.5.3 Provision for earthing circuits above 1200V
24 - 2.6 PROTECTION REQUIREMENTS
24 - 2.6.1 General
24 - 2.6.2 Protection devices
27 - 2.6.3 Transformer protection
27 - 2.6.4 Motor protection
27 - 2.6.5 Control protection or auxiliary circuits
27 - 2.7 REMOTE CONTROL
28 - SECTION 3 SPECIFIC LOCATION REQUIREMENTS
28 - 3.1 GENERAL
28 - 3.2 HAZARDOUS AREAS
28 - 3.2.1 Electric arcing interlocking
29 - 3.2.2 Enclosures
30 - 3.2.3 Batteries
30 - 3.2.4 Cable hose
30 - 3.2.5 Machine cables
31 - 3.2.6 Intrinsically safe plugs and sockets
33 - SECTION 4 TESTS
33 - 4.1 TYPE TESTS
33 - 4.1.1 Verification of compliance
33 - 4.1.2 Certificates of type tests
33 - 4.1.3 Exemption from re-test
33 - 4.1.4 Explosion-protection tests
33 - 4.1.5 Verification of the manufacturer’s assigned fault rating
34 - 4.1.6 Test arrangement
34 - 4.1.7 Short-circuit protective device incorporated
34 - 4.1.8 Short-circuit protective device not incorporated
34 - 4.1.9 Rated short-time withstand current test
35 - 4.1.10 Relationship between peak and r.m.s. values for short-circuit current
35 - 4.1.11 Test conditions and criteria
35 - 4.1.12 Power circuit test method and application
36 - 4.1.13 Criteria of acceptance
37 - 4.1.14 Temperature rise test
37 - 4.1.15 Temperature rise test for motors
38 - 4.1.16 Temperature measurements
38 - 4.2 ROUTINE TESTS
38 - 4.2.1 General
38 - 4.2.2 Insulation resistance test
39 - 4.2.3 High voltage test
40 - 4.2.4 Function test
40 - 4.2.5 Additional routine tests
41 - SECTION 5 MARKING AND LABELLING
41 - 5.1 EQUIPMENT MARKING
41 - 5.2 COMPONENT MARKING
41 - 5.3 WIRING MARKING
42 - 5.4 WARNING LABEL
42 - 5.5 WARNING PLATES
43 - APPENDIX A - INFORMATION TO BE SUPPLIED BY THE PURCHASER
43 - A1 RELATING TO THE SYSTEM TO BE INSTALLED
43 - A2 RELATING TO CONNECTED ELECTRICAL EQUIPMENT, WHERE KNOWN
43 - A3 RELATING TO CABLES AND CABLE ENTRIES
44 - APPENDIX B - INTEGRATED CONTROL SYSTEMS
44 - B1 GENERAL
44 - B2 RECOMMENDED PROCESS
44 - B3 OTHER RECOMMENDATIONS
45 - APPENDIX C - ADDITIONAL INFORMATION ON FLAMEPROOF ENCLOSURES
45 - C1 PRECAUTIONS ASSOCIATED WITH HIGH ENERGY ARC FAULTS
45 - C2 DOCUMENTATION
46 - APPENDIX D - DOCUMENTATION REQUIREMENTS

Specifies the general design, manufacturing, testing and performance standards for all electrical equipment intended for use in underground coal mines.

This Standard sets out the general requirements for all electrical equipment intended for use in underground coal mines.

First published as part of AS 1039-1972.
AS 1740 first published 1975.
Second edition AS 1039-1983.
AS 2595.1 first published 1983.
Second edition AS 1740-1985.
Second edition AS 2595.1-1985.
AS 2989 first published 1987.
Third edition AS 1039-1986.
Third edition AS 1740-1990.
Third edition AS 2595.1-1992.
Second edition AS 2989-1992.
AS 1039-1986, AS 1740-1990, AS 2595.1-1992 and AS 2989-1992 jointly revised, amalgamated and redesignated in part as AS/NZS 4871.1:2002