AS 1306-1985

1 - AS 1306-1985 HIGH VOLTAGE A.C. SWITCHGEAR AND CONTROLGEAR - DISCONNECTORS (ISOLATORS) AND EARTHING SWITCHES
4 - PREFACE
5 - CONTENTS
7 - 1. SCOPE AND GENERAL
7 - 1.1 SCOPE.
7 - 1.2 APPLICATION.
7 - 1.3 REFERENCED DOCUMENTS.
7 - 2. SERVICE CONDITIONS
7 - 3. DEFINITIONS
7 - 3.1 GENERAL.
7 - 3.101 GENERAL TERMS.
7 - 3.101.1 Switchgear and controlgear
7 - 3.101.2 Ambient air temperature
7 - 3.101.3 Temperature rise
7 - 3.102 SWITCHING DEVICES.
7 - 3.102.1 Disconnector
7 - 3.102.2 Divided support disconnector
7 - 3.102.3 Centre-break disconnector
8 - 3.102.4 Double-break disconnector
8 - 3.102.5 Earthing switch
8 - 3.103 PARTS OF SWITCHING DEVICES.
8 - 3.103.1 Contact (of a mechanical switching device)
8 - 3.103.2 Contact piece
8 - 3.103.3 Position indicating device
8 - 3.103.4 Position signalling device
8 - 3.103.5 Terminal
8 - 3.103.6 Contact zone
8 - 3.104 CHARACTERISTIC QUANTITIES.
8 - 3.104.1 Prospective peak current
8 - 3.104.2 (Peak) Making current (of an earthing switch
8 - 3.104.3 Peak current
8 - 3.104.4 Normal current (of a disconnector)
8 - 3.104.5 Permissible duration of short-circuit current
8 - 3.104.6 Peak withstand current
8 - 3.104.7 Rated value
8 - 3.104.8 Rated insulation level
8 - 3.104.9 Rated 1-minute power-frequency withstand voltage
8 - 3.104.10 Rated impulse withstand voltage
8 - 3.104.11 Clearance between open contacts (gap)
8 - 3.104.12 Clearance to earth
8 - 3.104.13 Mechanical terminal load
8 - 4. RATINGS
8 - 4.0 LIST OF RATINGS.
9 - 4.1 RATED VOLTAGE.
9 - 4.2 RATED INSULATION LEVEL.
9 - 4.3 RATED FREQUENCY.
9 - 4.4 RATED NORMAL CURRENT AND TEMPERATURE-RISE
9 - 4.5 RATED SHORT-TIME WITHSTAND CURRENT
9 - 4.6 RATED PEAK WITHSTAND CURRENT.
9 - 4.7 RATED DURATION OF SHORT-CIRCUIT.
9 - 4.8 RATED SUPPLY VOLTAGE OF CLOSING AND OPENING DEVICES AND AUXILIARY CIRCUITS
9 - 4.9 RATED SUPPLY FREQUENCY OF OPERATING DEVICES AND AUXILIARY CIRCUITS.
9 - 4.10 RATED PRESSUREOF COMPRESSED GAS SUPPLY FOR OPERATION
9 - 4.11 RATED MECHANICAL LOAD OF TERMINALS
11 - 4.101 RATED SHORT-CIRCUIT MAKING CURRENT
11 - 4.102 RATED CONTACT ZONE.
14 - 4.103 RATED VALUES OF MAXIMUM FORCE REQUIRED FOR MANUAL OPERATION
14 - 4.104 BEHAVIOUR WHEN CARRYING RATED PEAK WITHSTAND CURRENT AND RATED SHORT-TIME WITHSTAND CURRENT.
14 - 4.104.1 Disconnectors.
14 - 4.104.2 Earthing switches.
14 - 4.105 BEHAVIOUR OF EARTHING SWITCHES WHEN MAKING SHORT-CIRCUIT CURRENTS.
14 - 4.106 COORDINATION OF RATED VOLTAGES, RATED NORMAL CURRENTS, AND RATED SHORT-TIME WITHSTAND CYURRENTS
14 - 5. DESIGN AND CONSTRUCTION
14 - 5.1 REQUIREMENTS FOR LIQUIDS.
14 - 5.2 REQUIREMENTS FOR GASES.
16 - 5.3 EARTHING.
16 - 5.4 AUXILIARY EQUIPMENT.
16 - 5.5 DEPENDENT POWER CLOSING-OPENING.
16 - 5.6 STORED ENERGY CLOSING-OPENING.
16 - 5.7 OPERATION OF RELEASES.
16 - 5.8 LOW AND HIGH PRESSURE INTERLOCKING DEVICES
16 - 5.9 NAMEPLATES.
16 - 5.10 TERMINALS.
16 - 5.11 POSITION INDICATING DEVICE.
16 - 5.101 SPECIAL REQUIREMENTS FOR EARTHING SWITCHES
16 - 5.102 LEAKAGE CURRENTS ACROSS OPEN DISCONNECTORS.
16 - 5.103 MECHANICAL STRENGTH.
16 - 5.104 POSITION OF MOVABLE CONTACT SYSTEM AND SIGNALLING.
16 - 5.104.1 Securing of position.
16 - 5.104.2 Auxiliary contacts for position signalling.
16 - 5.105 MECHANICAL AND ELECTRICAL INTERLOCKS
18 - 6. TYPE TESTS
18 - 6.0 GENERAL.
18 - 6.1 DIELECTRIC TESTS
18 - 6.1.1 Ambient air conditions during tests.
18 - 6.1.2 Wet test procedure.
18 - 6.1.3 Conditions of disconnectors and earthing switches during tests
18 - 6.1.4 Application of test voltage and test conditions.
18 - 6.1.5 Test voltage.
18 - 6.1.6 Lightning and switching impulse voltage tests.
19 - 6.1.7 Power-frequency voltage withstand tests.
19 - 6.1.8 Artificial pollution tests.
19 - 6.1.9 Partial discharge tests.
19 - 6.1.10 Test on auxiliary and control circuits.
20 - 6.2 RADIO-INTERFERENCE VOLTAGE (RIV) TEST
20 - 6.3 TEMPERATURE-RISE TESTS.
20 - 6.4 MEASUREMENT OF RESISTANCE OF THE MAIN CIRCUIT
20 - 6.5 SHORT-TIME WITHSTAND CURRENT AND PEAK WITHSTAND CURRENT TESTS
20 - 6.5.1 Arrangements of the mechanical switching device and of the test circuit.
20 - 6.101 TESTS TO PROVE THE SHORT-CIRCUIT MAKING CURRENT PERFORMANCE OF EARTHING SWITCHES
20 - 6.102 TESTS TO PROVE SATISFACTORY OPERATION AND MECHANICAL ENDURANCE.
20 - 6.102.1 General test conditions.
24 - 6.102.2 Contact zone test.
24 - 6.102.3 Mechanical endurance test.
24 - 6.102.4 Verification of operation during application of rated mechanical terminals loads
24 - 6.103 TESTS TO PROVE SATISFACTORY OPERATION UNDER SEVERE ICE CONDITIONS.
24 - 6.103.1 Applicability of tests.
24 - 6.103.2 Test arrangements.
25 - 6.103.3 Test procedure.
25 - 6.104 TESTS TO PROVE SATISFACTORY OPERATION AT MINIMUM AND MAXIMUM AMBIENT AIR TEMPERATURE.
25 - 6.104.1 General.
25 - 6.104.2 Operation at minimum ambient air temperature
25 - 6.104.3 Operation at maximum ambient air temperature
26 - 7. ROUTINE TESTS
26 - 7.0 GENERAL.
26 - 7.1 POWER-FREQUENCY VOLTAGE WITHSTAND DRY TESTS ON THE MAIN CIRCUIT.
26 - 7.2 VOLTAGE WITHSTAND TESTS ON AUXILIARY AND CONTROL CIRCUITS
26 - 7.3 MEASUREMENT OF THE RESISTANCE OF THE MAIN CIRCUIT
26 - 7.101 MECHANICAL OPERATING TESTS.
26 - 8. GUIDE TO THE SELECTION OF SWITCHING DEVICES
26 - 8.1 GENERAL.
27 - 8.2 SELECTION OF RATED VALUES FOR NORMAL SERVICE CONDITIONS.
27 - 8.2.1 Selection of rated voltage.
27 - 8.2.2 Insulation coordination.
27 - 8.2.3 Selection of rated normal current.
27 - 8.2.4 Local atmospheric and service conditions.
27 - 8.2.5 Selection of rated short-time withstand current and of rated duration of short-circuit
27 - 8.2.6 Selection of rated peak withstand current and for earthing switches of rated short-circuit making current
27 - 9. INFORMATION TO BE GIVEN WITH ENQUIRIES, TENDERS AND ORDERS
27 - 9.1 INFORMATION TO BE GIVEN WITH ENQUIRIES AND ORDERS
28 - 9.2 INFORMATION TO BE GIVEN WITH TENDERS
29 - 10. TRANSPORT, STORAGE, ERECTION AND MAINTENANCE
29 - 11. QUALITY CONTROL DURING MANUFACTURE.
30 - APPENDIX AA - PROCEDURE FOR ARRANGING PRE-ARCING CONDITION WHEN TESTING EARTHING SWITCHES FOR MAKING CAPACITY AT REDUCED VOLT
31 - APPENDIX BB - PREFERRED NOMENCLATURE FOR TYPES OF AIR INSULATED DISCONNECTORS AND EARTHING SWITCHES AND USUAL RATED VOLTAGE R
32 - APPENDIX CC - ITEMS SUBJECT TO AGREEMENT BETWEEN THE PURCHASER AND THE MANUFACTURER
33 - ANNEX - SUMMARY OF TECHNICAL VARIATIONS BETWEEN THIS STANDARD AND IEC 129

Specifies requirements for disconnectors (isolators) and earthing switches designed for indoor and outdoor use at service frequencies up to and including 60 Hz in systems having rated voltages exceeding 1000 V. Applies also to the operating devices of these switches and to their auxiliary equipment. Includes service conditions, definitions, ratings, design and construction requirements, type and routine tests, guide to the selection of switching devices, information to be given with enquiries, tenders and orders, requirements for transport, storage, erection and maintenance, and a recommendation for quality control during manufacture.

This standard applies to disconnectors (isolators) and earthing switches designed for use outdoors or indoors at service frequencies up to and including 60 Hz in systems having rated voltages exceeding 1000 V.NOTE: The IEC term 'disconnector' is used henceforth throughout this standard and replaces the term 'isolator' as used in the previous edition of this standard. This standard also applies to the operating devices of the disconnectors and earthing switches and to their auxiliary equipment.NOTES:1. The isolating properties assigned to disconnector-fuses and drop-out fuses should comply with the requirements of this standard. (See AS 1033.)2. Earthing switches forming an integral part of a high voltage switch or disconnector must comply with this standard. (See AS 1025.)3. Other parts of an installation, such as plug devices and movable circuit-breakers in metal-enclosed switchgear, may so be used as disconnectors, provided that they comply with this standard.