AS 1039-1986

1 - AS 1039-1986 ELECTRICAL EQUIPMENT FOR COAL MINES - EXPLOSION-PROTECTED DISTRIBUTION AND CONTROL BOXES FOR VOLTAGES UP TO 330
4 - PREFACE
5 - CONTENTS
6 - SECTION 1. SCOPE AND GENERAL
6 - 1.1 SCOPE.
6 - 1.2 REFERENCED DOCUMENTS.
6 - 1.3 DEFINITIONS.
6 - 1.3.1 Access cover
6 - 1.3.2 Adaptor
6 - 1.3.3 Approved
6 - 1.3.4 Automatic control
7 - 1.3.5 Circuit-breaker
7 - 1.3.6 Contactor
7 - 1.3.7 Distribution and control box (DCB)
7 - 1.3.8 Explosion-protected
7 - 1.3.9 Flameproof enclosure
7 - 1.3.10 Intrinsically safe circuit
7 - 1.3.11 Inverse time-delay overcurrent release
7 - 1.3.12 Local control
7 - 1.3.13 Overcurrent and short-circuit protection
7 - 1.3.14 Overload protection
7 - 1.3.15 Rated prospective short-circuit current
7 - 1.3.16 Rated conditional short-circuit current
7 - 1.3.17 Rated short-time withstand current
7 - 1.3.18 Rated peak withstand current
7 - 1.3.19 Rating
7 - 1.3.20 Regulatory Authority
7 - 1.3.21 Remote control
7 - 1.3.22 Sequence interlocking
7 - 1.3.23 Undervoltage release
7 - 1.4 SERVICE CONDITIONS.
8 - SECTION 2. DESIGN AND CONSTRUCTION
8 - 2.1 GENERAL.
8 - 2.2 DISTRIBUTION AND CONTROL BOX (DCB).
8 - 2.2.1 Enclosure.
8 - 2.2.2 Selection of the equipment.
8 - 2.2.3 Accessibility.
8 - 2.2.4 Interaction.
8 - 2.2.5 Withdrawable equipment.
8 - 2.2.6 Unused openings and cable gland holes.
8 - 2.2.7 Internal electrical conductors and connections.
8 - 2.3 FLAMEPROOF ENCLOSURES.
8 - 2.3.1 General.
8 - 2.3.2 Fastenings.
8 - 2.3.3 Conductors through common walls.
8 - 2.3.4 Bushes.
8 - 2.4 EXPLOSION-PROTECTED ENCLOSURES.
8 - 2.5 ELECTRICAL EQUIPMENT.
8 - 2.5.1 Circuit breakers.
9 - 2.5.2 Contactors.
9 - 2.5.3 Interlocking.
9 - 2.5.4 Mounting requirements.
9 - 2.5.5 Instruments.
9 - 2.5.6 Auxiliary circuit protection.
9 - 2.6 MEANS FOR ISOLATION.
9 - 2.6.1 Isolating device.
9 - 2.6.2 Safety lock.
9 - 2.6.3 Test switch.
9 - 2.6.4 Phase-rotation reversal.
9 - 2.7 INTERLOCKING.
9 - 2.7.1 General.
9 - 2.7.2 Methods of interlocking.
10 - 2.7.3 Mechanical interlocking.
10 - 2.7.4 Electrical interlocking.
10 - 2.7.5 Electromechanical interlocking.
10 - 2.7.6 Plug electrical interlock.
10 - 2.8 SHORT-CIRCUIT PROTECTION AND SHORT-CIRCUIT CAPACITY.
10 - 2.8.1 General.
10 - 2.8.2 Information concerning the short-circuit capacity.
10 - 2.8.3 Relationship between peak and r.m.s. values for short-circuit current
11 - 2.8.4 Coordination of short-circuit protective devices.
11 - 2.8.5 Circuits within a DCB.
11 - 2.9 PREVENTION OF ARCING FAULTS.
11 - 2.9.1 General.
11 - 2.9.2 Insulating materials.
11 - 2.10 CABLE FITTINGS (flameproof enclosures).
11 - 2.10.1 Incoming, outgoing and throughgoing cable(s).
11 - 2.10.2 Auxiliary cable(s).
11 - 2.11 CABLE FITTINGS (other than flameproof enclosures)
11 - 2.12 PROVISION FOR EXTERNAL EARTHING.
11 - 2.13 COUPLING OF UNITS.
11 - 2.14 BUSBARS.
11 - 2.15 EARTHING OF POWER CONDUCTORS.
11 - 2.16 PROVISION FOR CONTROL.
11 - 2.16.1 Methods of control.
11 - 2.16.2 External control circuits.
11 - 2.17 TRANSFORMERS.
11 - 2.17.1 Rating.
11 - 2.17.2 Insulation.
11 - 2.17.3 Earthing.
11 - 2.17.4 Protection.
11 - 2.17.5 Power transformers.
12 - 2.17.6 Control transformers.
12 - 2.17.7 Earthing of control transformers.
12 - 2.17.8 Current transformers.
12 - 2.18 PROTECTION.
12 - 2.18.1 General.
12 - 2.18.2 Earth fault protection.
12 - 2.18.3 Earth fault lockout protection.
12 - 2.18.4 Earth continuity protection.
12 - 2.18.5 Loss of vacuum or frozen contact protection.
12 - 2.19 MARKING.
12 - 2.19.1 Marking of distribution and control boxes.
13 - 2.19.2 Terminals.
13 - 2.19.3 Diagrams.
13 - 2.19.4 Identification of wiring.
14 - SECTION 3. TESTS
14 - 3.1 ROUTINE TESTS.
14 - 3.1.1 General.
14 - 3.1.2 Insulation resistance test.
14 - 3.1.3 High voltage test.
14 - 3.1.4 Function test.
14 - 3.1.5 Additional tests.
14 - 3.2 TYPE TESTS.
14 - 3.2.1 Verification of compliance.
14 - 3.2.2 Explosion protection tests.
14 - 3.2.3 Verification of the short-circuit capacity.
17 - APPENDIX A - INFORMATION TO BE SUPPLIED BY THE PURCHASER
17 - A1 INFORMATION RELATING TO THE SUPPLY SYSTEM.
17 - A2 INFORMATION RELATING TO CONNECTED ELECTRICAL EQUIPMENT WHERE KNOWN.
17 - A3 INFORMATION RELATING TO THE DISTRIBUTION AND CONTROL BOX.
17 - A4 CABLES AND CABLE ENTRIES.
18 - APPENDIX B - RECOMMENDED PROCEDURE FOR OBTAINING APPROVAL

Specifies requirements for single-outlet and multi-outlet explosion protected distribution and control boxes for the attachment of trailing cables. Includes requirements for isolation, attachment of cables, overload protection and earthing. A testing section includes both type tests and routine tests. Design and test requirements have been expanded to include voltages up to 3300 V a.c.

This standard specifies requirements for multiple-outlet or single-outlet explosion-protected distribution and control boxes (hereinafter referred to as 'DCB') designed for use with a.c. voltages up to 3300 V, in the coalmining industry.NOTE: Appendix A sets out information to be specified by the purchaser with an enquiry or order.

Under Revision see DR 99402