AS 1025.1-1984

1 - AS 1025.1-1984 HIGH-VOLTAGE A.C. SWITCHGEAR AND CONTROLGEAR - SWITCHES AND SWITCH-DISCONNECTORS - FOR RATED VOLTAGES ABOVE 1
4 - PREFACE
5 - CONTENTS
7 - 1. SCOPE AND GENERAL
7 - 1.1 SCOPE.
7 - 1.2 APPLICATION.
7 - 1.3 REFERENCED DOCUMENTS.
7 - 1.4 OBJECT.
7 - 2. SERVICE CONDITIONS.
7 - 3. DEFINITIONS
7 - 3.1 GENERAL.
8 - 3.101 SWITCHES.
8 - 3.101. 1 Switch
8 - 3.101. 2 Switch- disconnector
8 - 3.101. 3 General purpose switch
8 - 3.101. 4 Increased operating frequency switch
8 - 3.101. 5 Limited purpose switch
8 - 3.101. 6 Motor switch
8 - 3.101. 7 Single capacitor bank switch
8 - 3.101. 8 Earthing switch
8 - 3.102 CHARACTERISTIC QUANTITIES.
8 - 3.102.1 Closed loop breaking current
8 - 3.102.2 Mainly active load breaking current
8 - 3.102.3 Earth fault breaking current
8 - 3.102.4 Cable charging breaking current under earth-fault conditions
8 - 4. RATINGS
8 - 4.0 LIST OF RATINGS.
8 - 4.1 RATED VOLTAGE.
8 - 4.2 RATED INSULATION LEVEL.
8 - 4.3 RATED FREQUENCY.
8 - 4.4 RATED NORMAL CURRENT AND TEMPERATURE RISE
8 - 4.4.1 Rated normal current.
8 - 4.5 RATED SHORT-TIME WITHSTAND CURRENT.
8 - 4.6 RATED PEAK WITHSTAND CURRENT.
8 - 4.7 RATED DURATION OF SHORT-CIRCUIT.
8 - 4.8 RATED SUPPLY VOLTAGE OF CLOSING AND OPENING DEVICES AND AUXILIARY CIRCUITS
8 - 4.9 RATED SUPPLY FREQUENCY OF OPERATING DEVICES AND AUXILIARY CIRCUITS.
8 - 4.10 RATED PRESSURE OF COMPRESSED GAS SUPPLY FOR OPERATION
8 - 4.11 RATED MECHANICAL LOAD OF TERMINALS.
8 - 4.101 RATED BREAKING CURRENTS OF A GENERAL PURPOSE SWITCH
9 - 4.102 RATED BREAKING CURRENT OF MOTOR SWITCHES.
9 - 4.102.1 Rated breaking current in steady state condition
9 - 4.102.2 Rated breaking current with stalled motor.
9 - 4.103 RATED SINGLE-CAPACITOR BANK BREAKING CURRENT OF A SWITCH
9 - 4.104 RATED SHORT- CIRCUIT MAKING CURRENT
9 - 4.105 SWITCHES BACKED BY CURRENT LIMITING FUSES
9 - 4.106 COORDINATION OF RATED VALUES.
9 - 4.108 RATED EARTH-FAULT BREAKING CURRENT
9 - 4.109 RATED CABLE-CHARGING BREAKING CURRENT UNDER EARTH-FAULT CONDITIONS
9 - 5. DESIGN AND CONSTRUCTION
9 - 5.1 REQUIREMENTS FOR LIQUIDS.
9 - 5.2 REQUIREMENTS FOR GASES.
9 - 5.3 EARTHING.
9 - 5.4 AUXILIARY EQUIPMENT.
9 - 5.5 DEPENDENT POWER CLOSING-OPENING
10 - 5.6 STORED ENERGY CLOSING-OPENING.
10 - 5.7 OPERATION OF RELEASES.
10 - 5.8 LOW AND HIGH PRESSURE INTERLOCKING DEVICES
10 - 5.9 NAMEPLATES.
10 - 5.10 TERMINALS.
10 - 5.11 POSITION INDICATING DEVICE.
10 - 5.101 MAKING AND BREAKING OPERATIONS.
10 - 5.102 REQUIREMENTS FOR SWITCH DISCONNECTORS.
10 - 5.103 MECHANICAL STRENGTH.
11 - 5.104 POSITION OF THE MOVABLE CONTACT SYSTEM AND ITS INDICATING OR SIGNALLING DEVICE.
11 - 5.104.1 Securing the position.
11 - 5.104.2 Indication of position.
11 - 5.104.3 Auxiliary contacts for signalling.
11 - 5.105 DEPENDENT MANUAL CLOSING.
11 - 6. TYPE TESTS
11 - 6.0 GENERAL.
11 - 6.1 DIELECTRIC TESTS.
11 - 6.1.9 Partial discharge tests.
11 - 6.2 RADIO-INTERFERENCE VOLTAGE (RIV) TEST
11 - 6.3 TEMPERATURE-RISE TESTS.
11 - 6.4 MEASUREMENT OF THE RESISTANCE OF THE MAIN CIRCUIT
11 - 6.5 SHORT-TIME WITHSTAND CURRENT AND PEAK WITHSTAND CURRENT TESTS.
11 - 6.101 MAKING AND BREAKING TESTS.
11 - 6.101.1 Arrangement of the switch for tests.
11 - 6.101.2 Earthing of the test circuit.
12 - 6.101.3 Test frequency.
12 - 6.101.4 Breaking current.
12 - 6.101.5 Test voltage.
12 - 6.101.6 Applied voltage before short-circuit making tests
12 - 6.101.7 Short-circuit making current.
12 - 6.101.8 Test circuits.
13 - 6.101.9 Test sequence for general purpose switches.
13 - 6.101.10 Test sequence for increased operating frequency switch
13 - 6.101.11 Test sequence for limited purpose switches.
13 - 6.101.12 Test sequence for single capacitor bank switches
13 - 6.101.13 Test sequence for motor switches.
13 - 6.101.14 Behaviour of switch during tests.
14 - 6.101.15 Condition of switch after breaking tests.
14 - 6.101.16 Condition of switch after short-circuit making tests
14 - 6.101.17 Test reports.
14 - 6.101.18 Tests with breaking currents for earth-fault conditions.
14 - 6.102 MECHANICAL ENDURANCE TEST.
16 - 6.103 OPERATION UNDER SEVERE ICE CONDITIONS.
16 - 7. ROUTINE TESTS
16 - 7.0 GENERAL.
16 - 7.1 POWER-FREQUENCY VOLTAGE WITHSTAND DRY TESTS ON THE MAIN CIRCUIT.
16 - 7.2 VOLTAGE WITHSTAND TESTS ON AUXILIARY AND CONTROL CIRCUITS.
16 - 7.3 MEASUREMENT OF THE RESISTANCE OF THE MAIN CIRCUIT
16 - 7.101 MECHANICAL OPERATING TESTS.
16 - 8. GUIDE TO THE SELECTION OF SWITCHING DEVICES FOR SERVICE
16 - 9. INFORMATION TO BE GIVEN WITH ENQUIRIES, TENDERS AND ORDERS
16 - 10. TRANSPORT, STORAGE, ERECTION AND MAINTENANCE
16 - 11. QUALITY CONTROL DURING MANUFACTURE
17 - APPENDIX A - CALCULATION OF ATMOSPHERIC CORRECTION FACTORS
17 - APPENDIX B - DETERMINATION OF THE EQUIVALENT R.M. S. VALUE OF A SHORT-TIME CURRENT DURING A SHORT-CIRCUIT OF A GIVEN DURATI
17 - APPENDIX C - REQUIREMENTS FOR A QUALITY ASSURANCE MANUAL
18 - APPENDIX AA - SINGLE-PHASE TESTS WITH SINGLE-POLE SWITCHES COMBINED IN A THREE- PHASE UNIT BUT OPERATED POLE-AFTER-POLE
18 - AA1 GENERAL.
18 - AA2 GENERAL PURPOSE SWITCH.
18 - AA3 SINGLE-CAPACITOR BANK SWITCH.
22 - APPENDIX BB - ITEMS SUBJECT TO AGREEMENT BETWEEN THE PURCHASER AND THE MANUFACTURER
22 - ANNEX - SUMMARY OF TECHNICAL VARIATIONS BETWEEN THIS STANDARD AND THE IEC DOCUMENTS ON WHICH IT IS BASED

Specifies requirements for a.c. switches and switch-disconnectors designed for indoor and outdoor installation for rated voltages above 1 kV and less than 52 kV and power frequencies up to and including 60 Hz. It is intended to be read in conjunction with AS 2650 and covers service conditions, definitions, ratings, design and construction requirements, type and routine tests, transport, erection, maintenance and quality control during manufacture.

This standard specifies requirements for a.c. switches and switch-disconnectors designed for indoor and outdoor installation for rated voltages above 1 kV and less than 52 kV and power frequencies up to and including 60 Hz.This standard also applies to the operating devices of these switches and to their auxiliary equipment.NOTES:1. For a.c. switches and switch disconnectors having rated voltages of 52 kV and above, prior to the issue of Part 2 of this standard, reference should be made to IEC 265-2, in course of preparation. In the meantime the appropriate provisions of IEC 265 apply to such switches and switch disconnectors.2. The term 'switch' applies to all kinds of switches and switch disconnectors within the scope of this standard. This standard does not require all switches to provide dis- connection (isolating) characteristics across open contacts. Where such characteristics are required, in conformity with IEC terminology, it is necessary to specify switch disconnectors.3. Earthing switches forming an integral part of a switch are covered by AS 1306. If the earthing switch has a rated short-circuit making current the making tests need to be made according to the requirements in this standard.4. High voltage alternating current contactors, high voltage fuse switch combinations and high voltage motor starters are covered by AS 1864, AS 2024 and AS 2232 respectively.

Under Revision see DR 01059