AS/NZS 1747:2003

AS/NZS 1747:2003 REELING, TRAILING AND FEEDER CABLES USED FOR MINING-REPAIR, TESTING AND FITTING OF ACCESSORIES

PREFACE

CONTENTS

SECTION 1 SCOPE AND GENERAL

1.1 SCOPE

1.2 REFERENCED DOCUMENTS

1.3 DEFINITIONS

1.3.1 Bunch

1.3.2 Cable coupling device

1.3.3 Cable repair facility

1.3.4 Cable repairer

1.3.5 Centre filler

1.3.6 Collectively screened cable

1.3.7 Composite screen

1.3.8 Conductor screen

1.3.9 Covered conductor

1.3.10 Cradle separator

1.3.11 Direction of lay

1.3.12 Earth conductor

1.3.13 Feeder cable

1.3.14 Ferrule

1.3.15 History record

1.3.16 Individually screened cable

1.3.17 Insulation screen

1.3.18 Length of lay

1.3.19 Multiple (or rope) strand

1.3.20 Partial break detection device

1.3.21 Pilot/control core

1.3.22 Power core

1.3.23 Reeling and trailing cable

1.3.24 Replacement

1.3.25 Restrained plug

1.3.26 Restrained receptacle

1.3.27 Semiconductive elastomer

1.3.28 Sheath

1.3.29 Spark test

1.3.30 Strand

1.3.31 Vulcanizer

1.3.32 Wires

SECTION 2 EVALUATION BEFORE REPAIR AND HISTORY RECORD

2.1 REQUIREMENTS

2.2 HISTORY RECORD

2.3 DETAILS OF CABLE TO BE RECORDED

2.4 VISUAL EXAMINATION

2.5 PREREPAIR TESTS

2.6 PRACTICABILITY OF REPAIR

SECTION 3 REPAIR PROCEDURES FOR CABLES

3.1 COMPATIBILITY OF CABLES TO BE JOINED

3.2 USE OF CLEANING SOLVENTS

3.3 JOINING BY FERRULES

3.3.1 Ferrules

3.3.2 Solder and flux

3.3.3 Technique

3.4 JOINING BY EXOTHERMIC WELDING

3.5 JOINING BY HARD SOLDERING

3.6 JOINING PILOT CONDUCTORS (all types of cable)

3.6.1 Single central (extensible) pilot conductors

3.6.2 Multiple central pilot conductors

3.6.3 Interstitial pilot conductors

3.7 JOINING POWER CONDUCTORS OF ALL REELING AND TRAILING CABLES

3.7.1 Power conductors having less than 19 bunches

3.7.2 Power conductors having 19 or more bunches

3.8 JOINING POWER CONDUCTORS OF FEEDER CABLES

3.9 JOINING EARTH CONDUCTORS (EXCLUDING EARTH SCREENS)

3.10 REPLACEMENT OF INSULATION OR COVERING OVER CONDUCTORS

3.11 JOINING INDIVIDUAL METALLIC OR COMPOSITE EARTH SCREENS

3.11.1 General

3.11.2 Repair of screen by ferrules

3.11.3 Repair of metallic screen without ferrules

3.12 REPLACEMENT OF SEMICONDUCTIVE ELASTOMERS

3.13 LAY-UP OF CORE ASSEMBLY

3.14 REPAIR OF INNER SHEATH

3.15 JOINING PLIABLE ARMOUR

3.16 REPLACEMENT OF SHEATH (inner or outer sheath)

3.17 VULCANIZING

SECTION 4 INSPECTION AND REPLACEMENT OF PLUGS AND OTHER CABLE ACCESSORIES

4.1 PLUG INSPECTION

4.2 PLUG AND TAIL INSPECTION (Surface mining applications)

4.2.1 Cables fitted with plugs

4.2.2 Cables fitted with tails

4.3 PLUG FITTING

4.3.1 General

4.3.2 Power cores

4.3.3 Earth screens and conductors

4.3.4 Pilot cores

4.3.5 Sheath protrusion and clamping

4.4 COMPOUNDS

4.5 FLAMEPROOFING

4.6 SUITABILITY FOR APPLICATIONS (Surface mining applications)

SECTION 5 TESTING

5.1 GENERAL

5.2 TEST EQUIPMENT

5.3 TESTS TO BE CARRIED OUT

5.3.1 Underground mining cables

5.3.2 Surface mining cables

5.3.3 Fitting accessories to cables

5.4 HIGH VOLTAGE FAULT LOCATION TEST

5.4.1 General

5.4.2 Equipment

5.4.3 Application of voltage

5.4.4 Authorization to exceed appropriate voltage pulse and number of pulses given in Table 5.4

5.5 CONTINUITY AND PHASE ROTATION TESTS

5.6 INSULATION RESISTANCE TEST

5.6.1 General

5.6.2 Testing of power conductors

5.6.3 Testing of pilot conductors

5.6.4 Requirements

5.7 HIGH VOLTAGE PROOF TEST

5.8 SYMMETRICAL LOAD TEST

5.9 PARTIAL BREAK TEST

5.10 TESTS FOR INTEGRITY OF OUTER SHEATH

5.10.1 General

5.10.2 Spark test (underground mining cables)

5.10.3 Spark test (surface mining cables)

5.11 SHEATH HARDNESS

SECTION 6 IDENTIFICATION OF REPAIRS

6.1 METHOD OF MARKING

6.2 INFORMATION TO BE MARKED

SECTION 7 TEMPORARY SHEATH REPAIRS

7.1 GENERAL

7.2 PERFORMANCE CRITERIA

7.3 MARKING OF TEMPORARY REPAIRS

7.4 MONITORING OF TEMPORARY REPAIRS

APPENDIX A - MINIMUM COMPUTER DATA BASE CABLE HISTORY INFORMATION

APPENDIX B - REQUIREMENTS FOR FERRULES

B1 CONSTRUCTION

B2 LENGTH

B3 INTERNAL CROSSSECTIONAL DIMENSION

B4 WALL THICKNESS

APPENDIX C - REQUIREMENTS FOR SOLDER AND FLUX

C1 SOLDER

C2 SILVER SOLDER

C3 FLUX

APPENDIX D - PROCEDURE FOR EXOTHERMIC WELDING

D1 GENERAL

D2 PREPARATION

D3 MOULD SET UP

D4 WELDING

D5 REMOVAL OF EXCESS WELD FROM THE CONDUCTOR

D6 QUALITY OF WELDED JOINT

APPENDIX E - A PROCEDURE FOR HARD SOLDERING

E1 GENERAL SOLDERING INFORMATION

E2 PROCEDURE

APPENDIX F - REPAIR MATERIALS AND TAPES

F1 INSULATION OR COVERING

F1.1 Type

F1.2 Tape over insulation

F2 SEMICONDUCTIVE ELASTOMER CORE SCREENS AND SHEATH COMPONENT

F3 REINFORCEMENT

F4 SHEATH MATERIAL

F5 VULCANIZING CONDITIONS FOR INSULATION AND SHEATHS

F6 STORAGE OF REPAIR TAPES

F7 INCOMPATIBLE MATERIALS

F8 IDENTIFICATION OF REPAIR MATERIALS

APPENDIX G - GUIDANCE ON ASSESSING CABLE CONDITION

G1 GENERAL

G2 INITIAL TEST

G3 SHEATH TEST

G4 CABLE REPAIRER

G5 FINAL TESTING

APPENDIX H - REQUIREMENTS FOR TEST EQUIPMENT

H1 HIGH VOLTAGE PROOF TEST UNIT

H2 OHMIC RESISTANCE AND CONTINUITY TEST UNIT

H3 PARTIAL BREAK TEST UNIT

H4 SPARK TEST UNIT FOR TESTING THE INTEGRITY OF SHEATH

H5 INSULATION TESTING UNIT

H6 SHEATH HARDNESS TEST UNIT

H7 SYMMETRICAL LOAD TEST

APPENDIX I - ROUTINE TESTS ON TEST EQUIPMENT

I1 GENERAL

I2 HIGH VOLTAGE PROOF TEST UNIT

I3 HIGH VOLTAGE FAULT LOCATION TEST UNIT

I4 CONTINUITY TEST UNIT

I5 PARTIAL BREAK TEST UNIT

I6 SPARK TEST UNIT FOR TESTING INTEGRITY OF SHEATH

I7 INSULATION TEST UNIT

I8 SHEATH HARDNESS TEST UNIT

I9 SYMMETRICAL LOAD TEST UNIT

APPENDIX J - COMBINED RESISTANCE OF EARTH CONDUCTORS FOR TYPES 275 AND 280B CABLES

J1 SCOPE