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AS 1740-1990

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

Electrical equipment for coal mines - Transformer substations for use underground
Available format(s)

Hardcopy , PDF 1 User , PDF 3 Users , PDF 5 Users , PDF 9 Users

Superseded date

03-28-2023

Language(s)

English

Published date

01-01-1990

Publisher

Standards Australia

Preview

1 - AS 1740-1990 ELECTRICAL EQUIPMENT FOR COAL MINES - TRANSFORMER SUBSTATIONS FOR USE UNDERGROUND
4 - PREFACE
5 - CONTENTS
7 - SECTION 1 SCOPE AND GENERAL
7 - 1.1 SCOPE.
7 - 1.2 APPLICATION.
7 - 1.3 REFERENCED DOCUMENTS.
8 - 1.4 DEFINITIONS.
9 - SECTION 2 GENERAL REQUIREMENTS FOR DESIGN AND CONSTRUCTION
9 - 2.1 GENERAL REQUIREMENTS.
9 - 2.2 SUPPLY SYSTEM.
9 - 2.3 PREFERRED RATINGS.
9 - 2.4 INSULANT.
9 - 2.5 MAXIMUM SURFACE TEMPERATURE.
9 - 2.6 TRANSFORMERS.
9 - 2.6.1 General.
9 - 2.6.2 Lifting and anchoring of core.
9 - 2.6.3 Voltage adjustment tappings.
10 - 2.6.4 Neutral conductor.
10 - 2.7 SWITCHING DEVICES.
10 - 2.7.1 General.
10 - 2.7.2 Circuit-breakers.
10 - 2.7.3 Switch-fuse combinations.
10 - 2.7.4 Operation.
10 - 2.7.5 Contactors.
10 - 2.8 MOUNTING.
10 - 2.9 MEASURING INSTRUMENTS.
10 - 2.10 PREVENTION OF ARCING FAULTS.
10 - 2.11 CABLES.
10 - 2.12 PROTECTION AND MONITORING.
10 - 2.12.1 General.
10 - 2.12. 2 Arrangement of protection.
11 - 2.12.3 Overcurrent and short-circuit protection.
11 - 2.12.4 Overload protection.
11 - 2.12.5 Earth-fault/ Earth-leakage protection.
11 - 2.12.6 Earth-continuing protection.
11 - 2.12.7 Earth-fault lockout protection.
11 - 2.12.8 Earth-fault current limitation.
11 - 2.12.9 Undervoltage protection.
11 - 2.12.10 Loss of vacuum protection.
11 - 2.12.11 Frozen contact protection.
11 - 2.12.12 Under/over pressure protection.
13 - 2.12.12 Under/over pressure protection.
13 - 2.12.13 Overtemperature protection.
13 - 2.13 TESTING AND INDICATING FACILITIES.
13 - 2.14 SYSTEM FAULT LEVELS.
13 - 2.15 SHORT-CIRCUIT PROTECTION AND SHORT-CIRCUIT CAPACITY.
13 - 2.15.1 General.
13 - 2.15.2 Current-limiting devices.
13 - 2.16 AUXILIARY CIRCUITS.
13 - 2.17 CABLE FITTINGS.
13 - 2.18 TERMINALS.
13 - 2.18.1 General.
14 - 2.18.2 Arrangement of terminals.
14 - 2.19 EARTHING.
14 - 2.19.1 General.
14 - 2.19.2 Earth terminal.
14 - 2.19.3 Attachment of earth strap.
14 - 2.19.4 Special earthing requirements.
14 - 2.19.5 Doors and covers.
14 - 2.20 CIRCUIT DIAGRAMS.
14 - 2.21 EQUIPMENT IDENTIFICATION.
14 - 2.22 MARKING.
14 - 2.22.1 Method of marking.
14 - 2.22.2 Information to be marked.
14 - 2.23 WARNING PLATES.
15 - SECTION 3 SPECIFIC REQUIREMENTS FOR SUBSTATIONS FOR USE IN NON-HAZARDOUS AREAS
15 - 3.1 SWITCHGEAR ENCLOSURES.
15 - 3.2 PRIMARY AND SECONDARY SWITCHGEAR.
15 - 3.2.1 Primary side.
15 - 3.2.2 Secondary side.
15 - 3.2.3 Loss of insulating medium.
15 - 3.3 INTERLOCKING.
15 - 3.4 PROTECTION FROM ARCING FAULTS.
16 - SECTION 4 SPECIFIC REQUIREMENTS FOR SUBSTATIONS FOR USE IN HAZARDOUS AREAS
16 - 4.1 GENERAL
16 - 4.2 APPROVAL.
16 - 4.3 PRIMARY AND SECONDARY SWITCHGEAR.
16 - 4.3.1 Primary side.
16 - 4.3.2 Secondary side.
16 - 4.3.3 Loss of insulating medium.
16 - 4.4 CONTROL CABLING.
16 - 4.5 INTERLOCKING.
16 - 4.5.1 General.
16 - 4.5.2 Methods of interlocking.
17 - 4.5.3 Mechanical interlocking.
17 - 4.5.4 Electrical interlocking.
17 - 4.5.5 Electromechanical interlocking.
17 - 4.6 TRANSFORMER UNIT- EXPLOSION-PROTECTED.
17 - 4.6.1 Flameproof construction.
17 - 4.6.2 Other explosion-protection construction.
18 - 4.7 MARKING.
19 - SECTION 5 ROUTINE TESTS
19 - 5.1 GENERAL.
19 - 5.2 INSULATION RESISTANCE TEST.
19 - 5.3 HIGH VOLTAGE TEST.
19 - 5.3.1 General.
19 - 5.3.2 Test voltage.
19 - 5.3.3 Test equipment.
19 - 5.3.4 Procedure.
19 - 5.3.5 Criteria of acceptance.
20 - 5.4 FUNCTION TEST.
20 - 5.5 ADDITIONAL TESTS.
21 - SECTION 6 TYPE TESTS
21 - 6.1 GENERAL.
21 - 6.1.1 Verification of compliance.
21 - 6.1.2 Nature of type tests.
21 - 6.1.3 Certificates of type test.
21 - 6.1.4 Exemption from re-test.
21 - 6.2 EXPLOSION-PROTECTION TESTS.
21 - 6.2.1 General.
21 - 6.2.2 Pressure test.
21 - 6.2.3 Vacuum test.
21 - 6.3 VERIFICATION OF THE SHORT-CIRCUIT CAPACITY.
21 - 6.3.1 Circuits which shall be verified by tests.
21 - 6.3.2 Test sections.
21 - 6.3.3 Primary section enclosure.
21 - 6.3.4 Transformer section enclosure.
22 - 6.3.5 Secondary section enclosure.
22 - 6.3.6 Relationship between peak and r.m.s. values for short-circuit current.
22 - 6.3.7 Test arrangement.
22 - 6.3.8 Performance of the tests- General.
23 - 6.3.9 Testing of the power circuits.
24 - APPENDIX A - INFORMATION TO BE SUPPLIED BY THE PURCHASER
24 - A1 SUPPLY SYSTEM.
24 - A2 CONNECTED ELECTRICAL EQUIPMENT.
24 - A3 SUBSTATION.
24 - A5 CABLES AND CABLE ENTRIES.
25 - APPENDIX B - RECOMMENDED PROCEDURE FOR OBTAINING APPROVAL

Specifies requirements for transformer substations for use in non-hazardous areas and hazardous areas and intended primarily for supplying power to machinery below ground in coal mines.

This Standard specifies the minimum requirements for transformer substations (hereinafter referred to as a substation(s)) for use in non-hazardous areas and hazardous areas and intended primarily for supplying power to machinery below ground in coal mines.NOTE: Substations may require approval by the relevant Regulatory Authority.

Committee
EL-023
DocumentType
Standard
ISBN
0 7262 6204 8
Pages
19
PublisherName
Standards Australia
Status
Superseded
SupersededBy
Supersedes

Under Revision see DR 99403

AS 2290.2-1993 Electrical equipment for coal mines - Maintenance and overhaul - Overhaul and repair of electrical equipment for hazardous areas
AS/NZS 3800:2005 Electrical equipment for explosive atmospheres - Repair and overhaul
AS/NZS 3800:1997 Electrical equipment for explosive atmospheres - Overhaul and repair
HB 13-2000 Electrical equipment for hazardous areas
SAA HB37.2-1993 Handbook of Australian fire Standards Electrical equipment (Reconfirmed 2016)

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Hardcopy - English
PDF 1 User - English
PDF 3 Users - English
PDF 5 Users - English
PDF 9 Users - English
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