COMMISSION ELECTROTECHNIQUEINTERNATIONALE NORME DE LA CEI INTERNATIONAL ELECTROTECHNICAL COMMISSION IEC STANDARD Publication 129 Troisieme edition - Third edition 1984 Sectionneurs et sectionneurs de terre a courant alternatif Alternating current disconnectors and earthing switches @CEI 1984 Draits de feproducrion reserves - Copyright - all rights reserved ique. y compris la photocope es les tmucrotidins. sans Iaccardt icardt de Tetiteur. putishe. Bureau Centrat de la Commission Electrotechnique Internationale 3. tue de Varembe Geneve,Suisse Prix 、F.s. 89.- 129 IEC 1984 3 CONTENTS Pate FOREWORD 7 PREFACE 7 Clause 9 1. Ni and special service conditioas 6 Definitions 3.101 General terms 9 Switching devices 3.102 11 3.103 Parts of switching devices 11 3.104 Operation (of a mechanical switching device) 13 13 3.105 Characteristic quantities 17 Rating 17 4.1 Rated voltage Rated insulation levei 17 4.2 4.3 Rated frequency 61 19 4.4 4.5 19 Rated short-time withstand current 19* Rated peak withstand current 4.6 4.7 Rated duration of short circuit Rated supply voltage of closing and opening devices and auxiliary circuits 4.8 Rated supply frequency of operating devices and auxiliary circuits 4.9 Rated pressure of compressed gas supply for operation 4.10 4.101 Rated short-circuit making current 4.102 Rated contact zone 4.103 Rated mechanical terminal load 4.104 Rated values of maximum force required for manual operation (under consideration) Behaviour when carrying rated peak withstand current and rated shor-time withstand current 4.105 Behaviour of earthing switches when making short-circuit curents 4.106 27 4.107 Co-ordination ofrated voltages.ratednormal currents.ratedshort-timewithstandcurentsandrated peak 27 withstand currents. Design and construction 37 5.1 Requirements for liquids in disconnectors and earthing switches 37 5.2 Requirements for gases in disconnectors and earthing switches .53 5.3 Earthing of disconnectors and earthing switches 5.4 37 Auxiliary equipment 5.5 37 Dependent power closing 5.6 Stored energy closing 5.7 Operation of releases Low and high pressure interlocking devices 5.8 5.9 Nameplates 5.101 Special requirements for earthing switches Requirements in respect of the isolating distance of disconnectors 5.102 Mechanical strength . 5.103 41 Position ofthemovable contact system and its indicating orsignallingdevices 41 5.104 Type tests 43 6. 6.1 Dielectric tests 43 6.2 Radio interference voltage (r.i.v.) tests 49 6.3 49 Temperature-rise tests 993859 6.4 Measurement of the resistance of the main circuit 6.5 Short-tirmeandpeakwithstand currenttests 6.101 Tests to prove the short-circuit making performance of earthing switches 6.102 Operating and mechanical endurance tests 6.103 Operation under severe ice conditions 6.104 Operation at the temperature limits Routine tests 61 7.1 Power-frequency voitage withstand dry tests on the main circuit 61 129IEC1984 5 Page 7.2 Voltage withstand tests on auxiliary and control circuits 61 7.3 Measurementoi the resistance of themain circuit 101z Mechanical operatingtests 63 Guideto the selection of switching devices for service 63 8.101. General 8.102 Selection of rated values for normal service conditions 65 69 9. Information to be given with enquiries, tenders and orders Information to be given with enquiries and orders 81 10t6 Information to be given with tenders . 9.102 Rules for transport, storage. erection and maintenance 33 10. 10.1 Conditions during transport. storage and erection 73 10.2 Erection 73 10.3 Maintenance 74 FIGURES