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

This Standard sets out recommendations and procedures for the maintenance of electrical switchgear. It is applicable to electrical switchgear having rated voltages not greater than 145V..

This Standard sets out procedures and recommendations for the maintenance of electrical switchgear. It is applicable to electrical switchgear having rated voltages not greater than 145 kV. At voltages above this level the design of equipment, system operations and consequently maintenance requirements and practices may differ significantly from those at voltages up to this level. However, the principles formulated in this Standard as good practice, especially those regarding the safety of personnel, are for the most part applicable at the higher voltages.The Standard does not apply to the maintenance of electrical switchgear - (a) of sealed construction intended only to be returned to the manufacturer for adjustment and repair; or (b) used in explosive atmospheres and in coal mines. Reference should be made to appropriate Standards for the maintenance of electrical equipment used in explosive atmospheres and in coal mines.

Originated as AS CC9-1965.
Revised and redesignated as AS 2467-1981.
Second edition 2008.