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1 IEC/PAS Edition High-voltage switchgear and controlgear Part 109: Alternating-current series capacitor by-pass switches PUBLICLY AVAILABLE SPECIFICATION INTERNATIONAL ELECTROTECHNICAL COMMISSION Reference number IEC/PAS

2 2 Copyright 2002, IEC CONTENTS FOREWORD General Scope Normative references Normal and special service conditions Definitions General terms Assemblies Parts of assemblies Switching devices Parts of by-pass switches Operation Characteristic quantities Definitions related to series capacitor banks Index of definitions Ratings Rated voltage (U r ) Rated insulation level Rated frequency (f r ) Rated normal current (I r ) and temperature rise Rated short-time withstand current (I k ) Rated peak withstand current (I p ) Rated duration of short circuit (t k ) Rated supply voltage of closing and opening devices and of auxiliary and control circuits (U a ) Rated supply frequency of closing and opening devices and auxiliary circuits Rated pressures of compressed gas supply for insulation, operation and/or by-passing and insertion Design and construction Requirements for liquids in by-pass switches Requirements for gases in by-pass switches Earthing of by-pass switches Auxiliary equipment Dependent power operation Stored energy operation Independent manual operation Operation of releases Low- and high-pressure interlocking devices Nameplates Interlocking devices Position indication Degrees of protection by enclosures Creepage distances Gas and vacuum tightness Liquid tightness Flammability Electromagnetic compatibility...30

3 Copyright 2002, IEC 3 6 Type tests General Grouping of tests Information for identification of specimens Information to be included in type test reports Dielectric tests Ambient air conditions during tests Wet test procedure Condition of by-pass switch during dielectric tests Criteria to pass the test Application of test voltage and test conditions Tests of by-pass switches of U re 245 kv or U rp 245 kv Tests of by-pass switches of U re > 245 kv or U rp > 245 kv Artificial pollution tests Partial discharge tests Tests on auxiliary and control circuits Voltage test as a condition check Radio interference voltage (r.i.v.) tests Measurement of the resistance of the main circuit Temperature-rise tests Conditions of the by-pass switch to be tested Arrangement of the equipment Measurement of the temperature and the temperature rise Ambient air temperature Temperature-rise tests of the auxiliary and control equipment Interpretation of the temperature-rise tests Short-time withstand current and peak withstand current tests Arrangement of the by-pass switch and of the test circuit Test current and duration Behaviour of the by-pass switch during test Conditions of the by-pass switch after test Verification of the degree of protection Verification of the IP coding Mechanical impact test Tightness tests Electromagnetic compatibility (EMC) tests Routine tests Dielectric test on the main circuit Dielectric test on auxiliary and control circuits Measurement of the resistance of the main circuit Tightness test Design and visual checks Guide to the selection of by-pass switches for service Information to be given with enquiries, tenders and orders Rules for transport, storage, installation, operation and maintenance Conditions during transport, storage and installation Installation Operation Maintenance Safety...68

4 4 Copyright 2002, IEC Annex A (normative) Tolerances on test quantities during type tests...83 Annex B (normative) Records and reports of type tests...87 B.1 Information and results to be recorded...87 B.2 Information to be included in type test reports...87 B.2.1 General...87 B.2.2 Apparatus tested...87 B.2.3 Rated characteristics of by-pass switch, including its operating devices and auxiliary equipment...87 B.2.4 Test conditions (for each series of tests; if applicable)...87 B.2.5 Short-time withstand current and peak withstand current test...88 B.2.6 No-load operation...88 B.2.7 By-pass making current test-duty...88 B.2.8 Insertion current test-duty...88 B.2.9 Oscillographic and other records...88 Annex C (informative) List of symbols and abbreviations used...90 Figure 1 By-pass switch; Opening and closing operations70 Figure 2 By-pass switch Close-Open cycle...71 Figure 3 By-pass switch Open-Close cycle...72 Figure 4 Test sequences for low and high temperature tests...73 Figure 5 Static terminal load forces...74 Figure 6 Directions for static terminal load tests...75 Figure 7a Reference mechanical travel characteristics (idealised curve)...76 Figure 7b Reference mechanical travel characteristics (idealised curve) with the prescribed envelopes centered over the reference curve (+5 %, 5 %), contact separation in this example at time t = 20 ms...76 Figure 7c Reference mechanical travel characteristics (idealised curve) with the prescribed envelopes fully displaced upward from the reference curve (+10 %, 0 %), contact separation in this example at time t = 20 ms...77 Figure 7d Reference mechanical travel characteristics (idealised curve) with the prescribed envelopes fully displaced downward from the reference curve (+0 %, 10 %), contact separation in this example at time t = 20 ms 77 Figure 8 Equivalent testing set-up for unit testing of by-pass switches with more than one separate by-pass units...78 Figure 9 Recommended test circuit for the by-pass making current test-duty...79 Figure 10 Recommended LC test circuit for the insertion current test-duty...80 Figure 11 Recommended test circuit for the insertion current test-duty (mainly for high rated insertion current)...81 Figure 12 Recommended direct test circuit for the insertion current test-duty...82 Table 1 Nameplate information...29 Table 2 Type tests...32 Table 3 Number of operating sequences...40 Table 4 Examples of static horizontal and vertical forces for static terminal load test...46 Table 5 Invalid tests...53 Table 6 Application of voltage for dielectric test on the main circuit...57 Table A.1 Tolerances on test quantities for type tests...84

5 Copyright 2002, IEC 5 INTERNATIONAL ELECTROTECHNICAL COMMISSION HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR Part 109: Alternating-current series capacitor by-pass switches FOREWORD A PAS is a technical specification not fulfilling the requirements for a standard, but made available to the public. IEC-PAS has been processed by subcommittee 17A: High-voltage switchgear and controlgear, of IEC technical committee 17: Switchgear and controlgear. The text of this PAS is based on the following document: Draft PAS 17A/631/PAS This PAS was approved for publication by the P-members of the committee concerned as indicated in the following document: Report on voting 17A/637/RVD Following publication of this PAS, the technical committee or subcommittee concerned will investigate the possibility of transforming the PAS into an International Standard. 1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, the IEC publishes International Standards. Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. The IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested National Committees. 3) The documents produced have the form of recommendations for international use and are published in the form of standards, technical specifications, technical reports or guides and they are accepted by the National Committees in that sense. 4) In order to promote international unification, IEC National Committees undertake to apply IEC International Standards transparently to the maximum extent possible in their national and regional standards. Any divergence between the IEC Standard and the corresponding national or regional standard shall be clearly indicated in the latter. 5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with one of its standards.

6 6 Copyright 2002, IEC New numbering In accordance with the decision taken at the joint SC 17A/SC 17C meeting in Frankfurt (item 20.7 of 17A/535/RM) a common numbering system will be established of the standards falling under the responsibility of SC 17A and SC 17C. IEC (with the main title of High-voltage switchgear and controlgear) is the basis of the common standard. Numbering of the standards will apply the following principle: a) Common standards prepared by SC 17A and SC 17C will start with IEC ; b) Standards of SC 17A will start with IEC ; c) Standards of SC 17C will start with number IEC ; d) Guides prepared by SC 17A and SC 17C will start with number IEC The following Table provides an overview of the relationship between the old and new numbering: Common numbering of standards falling under the responsibility of subcommittees 17A and 17C IEC HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR Part Original title Old IEC number, if any 1 Common specifications IEC IEC High-voltage alternating current circuit-breakers IEC Synthetic testing of high-voltage alternating current circuit-breakers IEC High-voltage alternating current disconnectors and earthing switches IEC High-voltage switches for rated voltages above 1 kv and less than 52 kv IEC High-voltage switches for rated voltages of 52 kv and above IEC High voltage alternating current switch-fuse combinations IEC High-voltage alternating current contactors and contactor based motor-starters IEC Alternating current switchgear-fuse combinations New 108 Switchgear having combined functions New 200 Metal enclosed switchgear and controlgear for rated voltages up to and including 38 kv IEC Insulation-enclosed switchgear and controlgear for rated voltages up to and including IEC kv 202 High-voltage/low voltage prefabricated substations IEC Gas-insulated metal enclosed switchgear for rated voltages above 52 kv IEC IEC High-voltage gas-insulated transmission lines for rated voltages of 72,5 kv and above IEC Guide for seismic qualification IEC Guide for inductive load switching IEC Guide for short-circuit and switching test procedures for metal-enclosed and dead tank IEC circuit-breakers switches 303 Use and handling of sulphur hexafluoride (SF 6 ) in high-voltage switchgear and controlgear IEC Additional requirements for enclosed switchgear and controlgear from 1 kv to 72,5 kv to IEC be used in severe climatic conditions 305 Cable connections for gas-insulated metal-enclosed switchgear for rated voltages above IEC kv 306 Direct connection between power transformers and gas-insulated metal-enclosed IEC switchgear for rated voltages above 52 kv 307 The use of electronic and associated technologies in auxiliary equipment of switchgear IEC and controlgear 308 Guide for asymmetrical short-circuit breaking test duty T100a New 309 Electrical endurance testing for circuit-breakers rated 72,5 kv and above New

7 Copyright 2002, IEC 7 HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR Part 109: Alternating-current series capacitor by-pass switches 1 General 1.1 Scope This Publicly Available Specification is applicable to a.c. series capacitor by-pass switches designed for outdoor installation and for operation at frequencies of 50 Hz and 60 Hz on systems having voltages above V. It is only applicable to by-pass switches for use in three-phase systems. This specification is also applicable to the operating devices of by-pass switches and to their auxiliary equipment. This specification does not cover vacuum by-pass switches. 1.2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this Publicly Available Specification. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this Publicly Available Specification are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of IEC and ISO maintain registers of currently valid International Standards. IEC 60050(151):1978, International Electrotechnical Vocabulary Chapter 151: Electrical and magnetic devices IEC 60050(441):1984, International Electrotechnical Vocabulary Chapter 441: Switchgear, controlgear and fuses IEC 60050(436):1990, International Electrotechnical Vocabulary Chapter 436: Power capacitors IEC 60050(601):1985, International Electrotechnical Vocabulary Chapter 601: Generation, transmission and distribution of electricity General IEC 60050(604):1987, International Electrotechnical Vocabulary Chapter 604: Generation, transmission and distribution of electricity Operation IEC 60059:1999, IEC standard current ratings IEC 60060: all parts, High-voltage test techniques IEC :2002, Surge arresters Part 4: Metal-oxide surge arresters without gaps for a.c. systems IEC 60129:1984, Alternating current disconnectors and earthing switches IEC 60137:1995, Bushings for alternating voltages above V

8 8 Copyright 2002, IEC IEC :1992, Series capacitors for power systems Part 1: General Performance, testing and rating Safety requirements Guide for installation IEC :1994, Series capacitors for power systems Part 2: Protective equipment for series capacitor banks IEC :1989, Electrical relays Part 3: Single output energizing quantity measuring relays with dependent or independent time IEC 60296:1982, Specification for unused mineral insulating oils for transformers and switchgear IEC 60376:1971, Specification and acceptance of new sulphur hexafluoride IEC 60427:1989, Synthetic testing of high-voltage alternating current circuit-breakers IEC 60480:1974, Guide to the checking of sulphur hexafluoride (SF 6 ) taken from electrical equipment IEC 60529:1989, Degrees of protection provided by enclosures (IP code) IEC 60694:1996, Common specifications for high-voltage switchgear and controlgear standards IEC 61633:1995, High-voltage alternating current circuit-breakers Guide for short-circuit and switching test procedures for metal-enclosed and dead tank circuit-breakers IEC 61634:1995, High-voltage switchgear and controlgear Use and handling of sulphur hexafluoride (SF 6 ) in high-voltage switchgear and controlgear IEC :2001, High-voltage switchgear and controlgear Part 100: High-voltage alternating current circuit-breakers