IEC_60129-1984_scan.pdf

129IEC1984-7-INTERNATIONAL ELECTROTECHNICAL COMMISSIONALTERNATING CURRENT DISCONNECTORSAND EARTHING SWITCHESFOREWORD1)The formal decisions or agreements of the IEC on technical matters.prepared by Technical Committees on which all theNational Committees having a special interest therein are represented,express.as nearly as possible,an interationai consensusof opinion on the subjects dealt with.2)They have the form of recommendations for international use and they are accepted by the National Committees in.thatsense.3)In order to promoteintemational unification.theIECexpresses the wish that all National Committees should adopt the text ofthe IECrecommendation for their national rules in so far as national conditions will permit Any divergence between the IECrecommendation and the corresponding national rules should,as far as possible,be clearly indicated in the latter.PREFACEThis standard has been prepared by Sub-Committee 17A:High-voltage Switchgear and Controlgear,of IEC Technical Committee No.17:Switehgear and Controlgear.This third edition replaces the second edition of IEC Publication 129.This standard refers to IECPublication 694:Common Clauses for High-voltage Switchgear and Controlgear Standards,which isapplicable unless otherwise specified in this standard.In order to simplify the indication of corre-sponding requirements,the same numbering of clauses and sub-clauses is used as in Publication 694.Amendments to these clauses and sub-clauses are given under the same references whilst additionalsub-clauses are numbered from 101.The text of this standard is based on the following documents:Six MonthsRuleReport on VotingI7A(CO)16217A(Co)166Further information can be found in the Report on Voting,indicated in the table above.The following IEC publications are quoted in this standard:Publications Nos.50(151)(1978):International Electrotechnical Vocabutary(IEV),Chapter 151:Electrical and MagneticDevices.50441)(1984):Chapter 441:Switchgear.Controlgear and Fuses.60-1(1973):High-voltage Test Techniques,Part 1:General Definitions and Test Requirements.137(1973):Bushings for Alternating Voltages above 1 000 V.265(1968):High-voltage Switches.270(1981):Partial Discharge Measurements.298(1981):A.C.Metal-enclosed Switchgear and Controlgear for Rated Voltagesabove I kV and up toand Including 72.5 kV.466(1974):High-voltage Insulation-enclosed Switchgear and Controlgear.517(1975):High-voltage Metal-enclosed Switchgear for Rated Voltages of 72.5 kV and Above.694(1980):Commor Clauses for High-voltage Switchgear and Controlgear Standards.