AS 2467-2008

1 - AS 2467-2008 MAINTENANCE OF ELECTRICAL SWITCHGEAR
4 - PREFACE
5 - CONTENTS
8 - SECTION 1 SCOPE AND GENERAL
8 - 1.1 SCOPE
8 - 1.2 RATIONALE
8 - 1.3 OBJECT
9 - 1.4 APPLICATION
9 - 1.5 STATUTORY AND LEGAL REQUIREMENTS
9 - 1.6 DEFINITIONS
9 - 1.6.1 Acceptable conditions*
10 - 1.6.2 Electrical station
10 - 1.6.3 Emergency action
10 - 1.6.4 Examination
10 - 1.6.5 Failure (breakdown)*
10 - 1.6.6 Inspection
10 - 1.6.7 Item
10 - 1.6.8 Maintenance
10 - 1.6.9 Operational check
10 - 1.6.10 Test
11 - 1.6.11 Overhaul
12 - SECTION 2 SAFETY OF PERSONNEL
12 - 2.1 GENERAL
12 - 2.2 RESPONSIBILITY
12 - 2.2.1 Statutory requirements
12 - 2.2.2 Authorized person
12 - 2.3 FIRST AID
12 - 2.4 ACCESS
12 - 2.5 SAFETY RULES
12 - 2.5.1 General
12 - 2.5.2 Anticipating dangers
13 - 2.5.3 Familiarity with rules
13 - 2.5.4 Supply authority rules
13 - 2.5.5 High-voltage equipment
14 - SECTION 3 SAFETY PROVISIONS FOR MAINTENANCE OPERATIONS
14 - 3.1 GENERAL
14 - 3.2 AVOIDANCE OF MOISTURE AND DUST
14 - 3.3 CONTAINMENT OF FAULTS
14 - 3.4 FIRE EXTINGUISHING EQUIPMENT
14 - 3.4.1 Availability of equipment and training of personnel
14 - 3.4.2 Suitability for intended purpose
14 - 3.4.3 Inspection and labelling
15 - 3.4.4 Renewal or recharge after use
15 - 3.4.5 Automatic fire extinguishing installations
15 - 3.5 EMERGENCY EXITS
15 - 3.6 LIGHTING
15 - 3.7 ACCESS
15 - 3.8 EARTHING EQUIPMENT
15 - 3.8.1 Availability of earthing equipment
15 - 3.8.2 Suitability of earthing equipment
15 - 3.8.3 Inspection
15 - 3.8.4 Permanently stored earthing equipment
16 - 3.9 EARTH MATS
16 - 3.10 INSULATING MATS, STANDS, SCREENS AND OTHER SIMILAR EQUIPMENT
16 - 3.11 VERIFICATION THAT CONDUCTORS ARE NOT ALIVE
16 - 3.12 PROTECTION AGAINST INDUCTION
16 - 3.13 DETECTION OF HAZARDOUS GASES
16 - 3.14 DANGER FROM STORED ENERGY
16 - 3.15 PORTABLE ELECTRIC TOOLS
16 - 3.16 INSTRUCTIONS, NOTICES AND LABELS
16 - 3.16.1 Availability and display
17 - 3.16.2 Removal and replacement of identification labels
17 - 3.16.3 Caution and danger plates
17 - 3.16.4 Emergency exits
18 - SECTION 4 FREQUENCY OF MAINTENANCE OPERATIONS
18 - 4.1 GENERAL
18 - 4.2 PLANNING THE FREQUENCY OF MAINTENANCE OPERATIONS
18 - 4.2.1 Manufacturer’s instructions
18 - 4.2.2 Newly commissioned equipment
19 - 4.2.3 Records
19 - 4.2.4 Routine mainten
19 - 4.2.5 Post-fault maintenance
20 - 4.3 INSULATING OIL
20 - 4.3.1 General considerations
20 - 4.3.2 Environmental conditions
20 - 4.3.3 Deterioration and contamination
20 - 4.3.4 Normal maintenance tests
20 - 4.3.5 Auto-reclosing duty
20 - 4.4 RECOMMENDED INTERVALS
20 - 4.4.1 General
20 - 4.4.2 Operational check of a circuit-breaker
21 - 4.4.3 Indoor switchgear
21 - 4.4.4 Outdoor switchgear
21 - 4.4.5 Frequent operation or adverse atmospheric conditions
22 - SECTION 5 MAINTENANCE OF SWITCHGEAR INTENDED TO OPERATE AT VOLTAGES UP TO 1000 V a.c. AND 1200 V d.c.
22 - 5.1 PRE-MAINTENANCE REQUIREMENTS AND PRECAUTIONS
22 - 5.1.1 Safety of personnel
22 - 5.1.2 Equipment to be rendered inoperative
22 - 5.1.3 Manufacturer™s operation and maintenance instructions
22 - 5.1.4 Replacement parts
22 - 5.2 FREQUENCY OF MAINTENANCE
22 - 5.3 DIAGNOSTIC TESTING
23 - 5.4 ROUTINE MAINTENANCE
23 - 5.4.1 Inspection
23 - 5.4.2 Examination and overhaul
26 - 5.5 POST-FAULT MAINTENANCE
26 - 5.6 MAINTENANCE OF AUXILIARY EQUIPMENT
26 - 5.7 SUMMARY OF MAINTENANCE OPERATIONS
28 - SECTION 6 MAINTENANCE OF AIR-BREAK SWITCHGEAR INTENDED FOR OPERATION AT VOLTAGES ABOVE 1000 V a.c. AND 1200 V d.c.
28 - 6.1 PRE-MAINTENANCE REQUIREMENTS AND PRECAUTIONS
28 - 6.1.1 Safety of personnel
28 - 6.1.2 Equipment to be rendered inoperative
28 - 6.1.3 Manufacturer’s operation and maintenance instructions
28 - 6.1.4 Replacement parts
29 - 6.2 FREQUENCY OF MAINTENANCE
29 - 6.3 DIAGNOSTIC TESTING
29 - 6.4 OPERATIONAL CHECK
29 - 6.5 ROUTINE MAINTENANCE
29 - 6.5.1 Inspection
29 - 6.5.2 Examination and overhaul
35 - 6.6 POST-FAULT MAINTENANCE
35 - 6.7 MAINTENANCE OF AUXILIARY EQUIPMENT
35 - 6.8 HIGH-VOLTAGE FUSE CONNECTIONS AND ASSOCIATED LINKAGE
35 - 6.9 SUMMARY OF MAINTENANCE OPERATIONS
37 - SECTION 7 MAINTENANCE OF OIL SWITCHGEAR
37 - 7.1 APPLICATION OF SECTION
37 - 7.2 SPECIAL PRECAUTIONS FOR OIL SWITCHGEAR
37 - 7.3 ROUTINE MAINTENANCE
37 - 7.3.1 Examination and overhaul
39 - 7.4 POST-FAULT MAINTENANCE
39 - 7.4.1 Isolation of withdrawable metal-clad switchgear
39 - 7.4.2 Insulating oil
39 - 7.4.3 Joints and seals
40 - 7.4.4 General mechanical inspection
40 - 7.5 SUMMARY OF MAINTENANCE OPERATIONS
42 - SECTION 8 MAINTENANCE OF AIR-BLAST CIRCUIT-BREAKER SWITCHGEAR
42 - 8.1 APPLICATION OF SECTION
42 - 8.2 PRE-MAINTENANCE REQUIREMENTS AND PRECAUTIONS
42 - 8.2.1 Reduction in air pressure
42 - 8.2.2 Adjacent unsilenced circuit-breakers
42 - 8.2.3 Avoidance of hydraulic tests on air receivers
42 - 8.3 ROUTINE MAINTENANCE
42 - 8.3.1 Examination and overhaul
46 - 8.4 POST-FAULT MAINTENANCE
46 - 8.5 SUMMARY OF MAINTENANCE OPERATIONS
48 - SECTION 9 MAINTENANCE OF VACUUM CIRCUIT-BREAKER SWITCHGEAR
48 - 9.1 APPLICATION OF SECTION
48 - 9.2 GENERAL
48 - 9.3 FREQUENCY OF MAINTENANCE
48 - 9.3.1 Determination of frequency of maintenance
48 - 9.4 ROUTINE MAINTENANCE
48 - 9.4.1 Examination and overhaul
49 - 9.5 POST-FAULT MAINTENANCE
49 - 9.6 SUMMARY OF MAINTENANCE OPERATIONS
51 - SECTION 10 MAINTENANCE OF SULPHUR HEXAFLUORIDE CIRCUIT-BREAKER SWITCHGEAR
51 - 10.1 APPLICATION OF SECTION
51 - 10.2 SPECIAL CONSIDERATIONS ARISING FROM THE USE OF SULPHUR HEXAFLUORIDE
51 - 10.2.1 Properties of sulphur hexafluoride
51 - 10.2.2 SF6 circuit-breakers
51 - 10.2.3 Statutory regulations
51 - 10.2.4 Warnings to personnel
52 - 10.3 PRE-MAINTENANCE REQUIREMENTS AND PRECAUTIONS
52 - 10.3.1 Access to equipment in contact with SF6
52 - 10.3.2 Maintenance opening or closing jacks
52 - 10.4 FREQUENCY OF MAINTENANCE
52 - 10.4.1 Factors to be considered for SF6 circuit-breakers
53 - 10.5 ROUTINE MAINTENANCE
53 - 10.5.1 Examination and overhaul
57 - 10.6 POST-FAULT MAINTENANCE
57 - 10.7 SUMMARY OF MAINTENANCE OPERATIONS
59 - SECTION 11 DIAGNOSTIC TESTING
59 - 11.1 GENERAL
59 - 11.2 DIAGNOSTIC TESTS FOR CORRECT OPERATION
59 - 11.2.1 Time-travel test
59 - 11.2.2 Timing test
59 - 11.2.3 Operating voltages
60 - 11.2.4 Operation of pressure switches
60 - 11.2.5 Compressed air and gas systems
60 - 11.2.6 Hydraulic systems
60 - 11.3 DIAGNOSTIC TESTS FOR CONTACTS AND CONNECTIONS
60 - 11.3.1 Resistance tests
60 - 11.3.2 Infrared detection
60 - 11.4 DIAGNOSTIC TESTS FOR INSULATION
60 - 11.4.1 Insulation tests-General
61 - 11.4.2 Insulation resistance test
61 - 11.4.3 Measurement of dielectric dissipation factor
61 - 11.4.4 Gas leakage test (SF6 circuit-breaker switchgear)
61 - 11.4.5 Air quality (Air-blast circuit-breaker switchgear)
63 - SECTION 12 MAINTENANCE OF AUXILIARY ITEMS
63 - 12.1 EQUIPMENT FOR TRIPPING AND CLOSING CURRENT SUPPLY
63 - 12.2 GENERAL PRECAUTIONS FOR BATTERY INSTALLATIONS
63 - 12.2.1 Precautions to be taken in battery charging areas
63 - 12.2.2 Handling electrolyte
63 - 12.2.3 Avoid mixing or contamination of electrolytes
63 - 12.3 SECONDARY CELL BATTERIES
63 - 12.3.1 General
64 - 12.3.2 Routine maintenance
64 - 12.3.3 Electrolyte condition
64 - 12.4 PRIMARY CELL BATTERIES
65 - 12.5 COMPRESSED AIR PLANT
65 - 12.6 CURRENT TRANSFORMERS
65 - 12.6.1 Precautions
65 - 12.6.2 Current transformers which are accessible
65 - 12.6.3 Oil-filled current transformers
65 - 12.6.4 SF6 insulated current transformers
65 - 12.6.5 Current transformers enclosed in metal-clad gear or otherwise inaccessible
65 - 12.7 VOLTAGE TRANSFORMERS
65 - 12.7.1 Precautions
66 - 12.7.2 Maintenance, inspection and verification
66 - 12.8 EQUIPMENT EARTHING CONNECTIONS
66 - 12.9 OTHER AUXILIARY DEVICES
66 - 12.9.1 Lifting devices
66 - 12.9.2 Oil handling plant
66 - 12.10 REPLACEMENT PARTS
67 - SECTION 13 MAINTENANCE OF PROTECTIVE APPARATUS
67 - 13.1 GENERAL
67 - 13.2 REMOVAL OF DUST
67 - 13.3 CONNECTIONS
67 - 13.4 ROUTINE TRIPPING TESTS
67 - 13.5 PROTECTIVE APPARATUS INCORPORATING SEMICONDUCTORS
67 - 13.6 INJECTION TESTS
67 - 13.6.1 Primary injection
67 - 13.6.2 Secondary injection
67 - 13.7 RELAYS
68 - SECTION 14 MAINTENANCE AND TESTING OF INSULATION
68 - 14.1 GENERAL
68 - 14.2 ROUTINE TESTING AND INSPECTION
68 - 14.2.1 Materials susceptible to deterioration
68 - 14.2.2 Systematic testing and recording methods
68 - 14.2.3 Measurement of the dielectric dissipation factor tan δ
68 - 14.2.4 Lift rods
68 - 14.2.5 Ambient temperature
69 - 14.3 ELECTROSTATICALLY GRADED (CONDENSER) BUSHINGS
69 - 14.3.1 General
69 - 14.3.2 Ingress of moisture
69 - 14.3.3 Sampling of oil
69 - 14.3.4 Compound-filled bushings
69 - 14.4 OIL BARRIER BUSHINGS
69 - 14.5 LAMINATED INSULATION
69 - 14.6 PORCELAIN INSULATION
70 - 14.7 APPLIED VOLTAGES FOR INSULATION RESISTANCE TESTS
70 - 14.8 POWER FREQUENCY WITHSTAND TESTS AFTER MAINTENANCE
71 - APPENDIX A - EXAMPLE OF ELECTRICAL SAFETY RULES
82 - APPENDIX B - MAINTENANCE RECORD FORMS
86 - APPENDIX C - FIRE PROTECTION EQUIPMENT
86 - C1 AUTOMATIC CONTROL
86 - C2 PORTABLE EXTINGUISHERS
86 - C3 VENTILATION OF ENCLOSED SPACE
87 - APPENDIX D - GRAPHICAL ILLUSTRATION OF SOME OF THE TERMS AND DEFINITIONS GIVEN IN CLAUSE 1.4
88 - APPENDIX E - APPROPRIATE ACTS AND REGULATIONS
88 - E1 GENERAL
88 - E2 LIST OF MATTERS WHICH MAY BE COVERED BY STATE ACTS AND REGULATIONS
89 - E3 EXAMPLES OF ACTS AND REGULATIONS IN FORCE IN INDIVIDUAL STATES OF AUSTRALIA
89 - E3.1 General
89 - E3.2 New South Wales
89 - E3.3 Victoria
89 - E3.4 Queensland
89 - E3.5 South Australia
89 - E3.6 Western Australia
89 - E3.7 Tasmania
90 - E3.8 Northern Territory
91 - APPENDIX F - REFERENCED DOCUMENTS