SF6 handling.pdf

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IEC/TR 62271-303

Edition 1.0 2008-07

TECHNICALREPORT

RAPPORTTECHNIQUE

High-voltage switchgear and controlgear

Part 303: Use and handling of sulphur hexafluoride (SF6)

Appareillage haute tension

Partie 303: Utilisation et manipulation de lhexafluorure de soufre (SF6)

INTERNATIONAL

ELECTROTECHNICAL

COMMISSION

COMMISSION

ELECTROTECHNIQUE

INTERNATIONALE XCICS 29.130.10

PRICE CODE

CODE PRIX

ISBN 2-8318-9915-X

Reg istered trademark of the International Electrotechnical CommissionMarque dpose de la Commission Electrotechnique Internationale


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2 TR 62271-303 IEC:2008

CONTENTS

FOREWORD...........................................................................................................................5INTRODUCTION.....................................................................................................................71 Scope...............................................................................................................................82 Normative references .......................................................................................................83 Terms and definitions .......................................................................................................84 Storage and transportation of SF6 ..................................................................................11

4.1 Storage of containers filled with SF6......................................................................114.2 Transportation of containers filled with SF6 ...........................................................134.3 Storage and transportation of electric power equipment containing SF6.................144.4 Responsibilities .....................................................................................................14

5 Safety and first a id .........................................................................................................145.1

General safety rules ..............................................................................................14

5.1.1 Protection of personnel.............................................................................. 155.1.2 Handling of contaminated safety equipment and tools ...............................165.1.3 Pressurised equipment and tools or measuring devices.............................175.1.4 Personal safety and protective equipment .................................................175.1.5 Facilities and services ...............................................................................18

5.2 Additional safety measures in case of abnormal release of SF6 due toexternal fire or internal arc fault .............................................................................18

5.3 First aid equipment and treatment .........................................................................19 5.3.1 Irritation of the skin....................................................................................195.3.2 Irritation of the eyes...................................................................................195.3.3 Breathing difficulty ..................................................................................... 20

6 Training and cer tification ................................................................................................206.1 General .................................................................................................................206.2 Training modules ...................................................................................................20

6.2.1 Module A Awareness ..............................................................................216.2.2 Module B1 Maintenance not implying gas recovery.................................21 6.2.3 Module B2 Installation and commissioning.............................................. 226.2.4 Module C1 Maintenance implying gas recovery ......................................226.2.5 Module C2 Decommissioning of electric power equipment at the

end-of-life ..................................................................................................236.3 Certification ...........................................................................................................23

7 SF6 handling during installation and commissioning .......................................................237.1 Evacuation, filling and checking the SF6 quality after filling ................................... 237.2 Topping-up of SF6 pre-filled compartments to the rated pressure/density ..............257.3 Filling sea led pressure systems.............................................................................27

8 SF6 handling during normal service life ..........................................................................27 8.1 Re-filling of SF6 to the nominal pressure/density ................................................... 278.2 Checking the SF6 quality .......................................................................................28

8.2.1 Measurement of the SF6 quality with portable equipment...........................298.2.2 Sampling and shipment of SF6 for off-site analysis ....................................29

9 SF6 recovering and reclaiming during maintenance ........................................................30 9.1 Recovery and reclaiming of SF6 from any compartment of controlled and/or

closed pressure systems containing non-arced and/or normally arced SF6 ............30


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TR 62271-303 IEC:2008 3

9.2 Recovery and reclaiming from any compartment of controlled and/or closedpressure systems containing heavily arced SF6 .....................................................32

10 Dismantling of SF6 electric power equipment at the end-of-life .......................................34 10.1 End-of-life of controlled and/or closed pressure systems .......................................35 10.2 End-of-life of sealed pressure systems .................................................................. 3510.3 Recovery and reclaiming of SF6 at the end-of-life of sealed pressure systems ...... 3610.4 Dismantling of electric power equipment at the end-of-life .....................................3810.5 By-products at the end-of-life ................................................................................39

11 Description of SF6 handling equipment ...........................................................................40 11.1 Reclaimer ..............................................................................................................40

11.1.1 External and internal pre-filters..................................................................41 11.1.2 Filters ........................................................................................................4111.1.3 Vacuum pump ...........................................................................................42 11.1.4 Main and auxiliary compressors .................................................................4311.1.5 External and internal gas storage containers .............................................4311.1.6 Evaporator and gas storage container heater ............................................4311.1.7 Gas piping and pipe junctions .................................................................... 4311.1.8 Control instruments ................................................................................... 4311.1.9 Safety valves .............................................................................................44

11.2 Flexible hose connections .....................................................................................4411.3 Portable devices for gas measurement .................................................................. 44

11.3.1 Dew point meter ........................................................................................4411.3.2 SF6 percentage measuring device.............................................................4511.3.3 Reaction tubes sensitive to SO2 ................................................................4511.3.4 Portable SF

6detectors ..............................................................................45

11.3.5Ala rm system SF6 detectors ......................................................................4611.4 Cylinder for gas samples .......................................................................................46

Annex A (informative) Sulphur hexaf luoride ... ... ... ... ... ... ... ... ... ... ..... ... ... ... ... ..... ... ... ... ..... ... ... .47Annex B (informative) Environmental effects of SF6 .............................................................51Annex C ( informative) SF6 by-products ................................................................................54Annex D ( informative) Potential effects on health of SF6 by-products...................................57Bibliography..........................................................................................................................76Figure 1 Commissioning or re-commissioning of SF6 compartments .................................. 24Figure 2 Topping-up of SF6 pre-filled compartments to the rated pressure/density.............26Figure 3 SF6 re-filling to the nominal pressure/density .......................................................28Figure 4 Checking the SF6 quality on-site ..........................................................................29Figure 5 SF6 sampling and shipment .................................................................................30Figure 6 Recovering and reclaiming from any compartment of controlled and/orclosed pressure systems containing non-arced and/or normally arced SF 6 ...........................31Figure 7 Recovering and reclaiming from any compartment of controlled and/orclosed pressure systems containing heavily arced SF6 .........................................................33Figure 8 End-of-life of controlled and/or closed pressure systems......................................35 Figure 9 End-of-life of sealed pressure systems.................................................................36 Figure 10 SF6 recovery and reclaiming at the end-of-life of sealed pressure systems ........37 Figure 11 Dismantling of electric power equipment ............................................................39Figure 12 General purpose reclaimer .................................................................................41


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4 TR 62271-303 IEC:2008

Figure A.1 Pressure/temperature/density characteristics for SF6 [9]...................................48Table 1 Methods for storage of SF6 ...................................................................................12Table 2 Container types and labelling required for storage and transportation of SF 6.........13Table 3 International regulations for shipment of SF6 .........................................................14Table 4 Measures when working with SF6 electric power equipment .................................. 15Table 5 Safety measures when opening and/or accessing gas compartments .................... 16Table 6 Neutra lising solutions ............................................................................................17Table 7 Additional safety measures ...................................................................................19Table 8 Commissioning or re-commissioning of SF6 compartments....................................25Table 9 Topping-up of SF6 pre-filled compartments to the rated pressure/density ..............27Table 10 SF6 re-filling to the nominal pressure/density ......................................................28Table 11 Checking the SF6 quality on-site .........................................................................29 Table 12 SF6 sampling and shipment .................................................................................30Table 13 Recovering and reclaiming from any compartment of controlled and/orclosed pressure systems containing non-arced and/or normally arced SF 6 ...........................32Table 14 Recovering and reclaiming from any compartment of controlled and/orclosed pressure systems containing heavily arced SF6 .........................................................34Table 15 SF6 recovery at the end-of-life of sealed pressure systems ................................. 38Table 16 Expected SF6 characteristics and quantity of by-products ................................... 40Table 17 Typical filter types used during SF6 reclaiming ....................................................42Table 18 Gas measuring devices .......................................................................................44Table A.1 Main chemical characteristics of SF6 [9].............................................................47Table A.2 Main physical characteristics of SF6 [9]..............................................................49Table A.3 Main electrical characteristics of SF6 [9] ............................................................49Table D.1 TLVs for SOF2, SO2, HF, and S2F10 ..................................................................60Table D.2 Results of example calculations for leakage situations.......................................63Table D.3 Results for leakage situations taking account of SOF2 hydrolysis ......................64 Table D.4 Sample calculation of S2F10 concentration for partial discharges .......................65 Table D.5 Sample calculation of S2F10 concentration for corona discharges ......................66 Table D.6 Sample calculation of S2F10 concentration for disconnector sparking.................67Table D.7 Sample calculation of SOF2 concentrations for internal fault situations ..............68Table D.8 Switchgear volume and filling pressure ..............................................................71Table D.9 Arc energies for interruptions .............................................................................72Table D.10 Arc energies for internal faults .........................................................................72 Table D.11 SOF2 production rates .....................................................................................73Table D.12 Quantities of SOF2 formed ...............................................................................73Table D.13 SF6 leakage rates ............................................................................................73Table D.14 SOF2 leakage rates .........................................................................................74


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TR 62271-303 IEC:2008 5

INTERNATIONAL ELECTROTECHNICAL COMMISSION____________

HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR


FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprisingall national electrotechnical committees (IEC National Committees). The object of IEC is to promoteinternational co-operation on all questions concerning standardization in the electrical and electronic fields. Tothis end and in addition to other activities, IEC publishes International Standards, Technical Specifications,Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as IECPublication(s)). Their preparation is entrusted to technical committees; any IEC National Committee interestedin the subject dealt with may participate in this preparatory work. International, governmental andnon-governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates

closely with the International Organization for Standardization (ISO) in accordance with conditions determinedby agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an internationalconsensus of opinion on the relevant subjects since each technical committee has representation from allinterested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC NationalCommittees in that sense. While all reasonable efforts are made to ensure that the technical content of IECPublications is accurate, IEC cannot be held responsible for the way in which they are used or for anymisinterpretation by any end user.

4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publicationstransparently to the maximum extent possible in their national and regional publications. Any divergencebetween any IEC Publication and the corresponding national or regional publication should be clearly indicatedin the latter.

5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any

equipment declared to be in conformity with an IEC Publication.

6) All users should ensure that they have the latest edition of this publication.

7) No liability should attach to IEC or its directors, employees, servants or agents including individual experts andmembers of its technical committees and IEC National Committees for any personal injury, property damage orother damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) andexpenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IECPublications.

8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications isindispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject ofpatent rights. IEC should not be held responsible for identifying any or all such patent rights.

The main task of IEC technical committees is to prepare International Standards. However, a

technical committee may propose the publication of a technical report when it has collecteddata of a different kind from that which is normally published as an International Standard, forexample "state of the art".

IEC 62271-303, which is a technical report, has been prepared by subcommittee 17A:High-voltage switchgear and controlgear, of IEC technical committee 17: Switchgear andcontrolgear.

This first edition of IEC/TR 62271-303 cancels and replaces the first edition of IEC 61634published in1995. This edition constitutes a technical revision.

This edition includes the following significant technical changes with respect to the previous

edition.

IEC 62271-303 is a major revision of the old IEC 61634. The former sections of IEC 61634are removed and replaced by the chapters of the CIGRE brochure n. 276.


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6 TR 62271-303 IEC:2008

IEC 61634 was issued in 1995 when the focus was on safety. In 2008, safety is a very wellknown and established concept and the focus is nowadays on the environmental compatibility.SF6 must be kept in a closed cycle and any intentional release must be forbidden. Theimplementation of the SF6 reuse concept suggested in the CIGRE brochure was updated withthe most recent information. Today SF6 can be recovered and reclaimed for either being

reused on-site or given back to the gas supplier and reused as raw material for the productionof "technical grade SF6". Detailed procedures for appropriate SF6 handling are given togetherwith the description of the state-of-the-art equipments and measuring devices.

More in detail, clause by clause:

The former Section 1 was removed and replaced with Clause 1 "Scope", Clause 2"Normative references" and Clause 3 Terms and Definitions.

Clause 4 "Storage and transportation of SF6", Clause 5 "Safety and first aid", Clause 6"Training and certification", and Clause 11 "Description of SF6 handling equipment" weretaken from the CIGRE brochure and their content was revised.

Clause 7 " SF6 handling during installation and commissioning", Clause 8 " SF 6 handling

during normal service life", Clause 9 " SF6 recovery and reclaiming during maintenance",and Clause 10 "Dismantling of SF6 electric power equipment at the end-of-life" were takenfrom the CIGRE brochure, their content was revised and replaces the former sections 2, 3,4, 5, and 6.

The former Annexes A, B, C, and D were revised while the Annexes E and F weredropped. The Bibliography replaces the former Annex G.

The text of this technical report is based on the following documents:

Enquiry draft Report on voting

17A/813/DTR 17A/817/RVC

Full information on the voting for the approval of this technical report can be found in the

report on voting indicated in the above table.

This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

A lis t of all parts of IEC 62271 series, under the general tit le High-voltage switchgear andcontrolgearcan be found on the IEC website.

The committee has decided that the contents of this publication will remain unchanged untilthe maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" inthe data related to the specific publication. At this date, the publication will be

reconfirmed,

withdrawn,

replaced by a revised edition, or

amended.


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TR 62271-303 IEC:2008 7

INTRODUCTION

SF6 technology is used in switchgear and controlgear, for more than 30 years. Its applicationis mainly in electric power equipment for rated voltages exceeding 1 kV up to the highestrated voltages for which switchgear and controlgear are manufactured. It is estimated thatseveral millions of the different types of SF6-filled units are currently in service.

Three methods for gas containment are technically available, according to IEC 62271-1:

controlled pressure system;

NOTE 1 Controlled pressure systems are no longer used for new equipment, because of the unacceptableleakage rate (see IEC 62271-203).

closed pressure system: modern high-voltage electric power equipments. Thestandardized values for leakage rates are 0,5 % and 1 % per year and per gas-filledcompartment;

sealed pressure system: modern medium-voltage electric power equipments (commercially

designated as sealed for life products or hermetically sealed systems). The tightness ofsealed pressure systems is specified by their expected operating life. The expected operatinglife with regard to leakage performance is specified by the manufacturer. Preferred valuesare 20, 30 and 40 years.

NOTE 2 To fulfil the expected operating life requirement the leakage rate of the SF6 sealed pressure systems isconsidered to be less than 0,1 % per year.

The long experience with the use of SF6 in switchgear and controlgear evidences that acertain number of elementary precautions and procedures should be adopted in order toachieve operational, safety at work and environmental benefits such as:

safe operation of the equipment;

optimisation of resources and tools required;

minimisation of out-of-service time for equipment;

standard training of personnel handling SF6;

reduction of the amount of gas released during handling operations down to the functionalphysical limit;

avoidance of any deliberate release, for example flushing to the atmosphere;

reduction of SF6 losses and emissions during commissioning, service, operation andend-of-life treatment to a minimum.

Recently, the latest practical recommendations on the use of SF 6 technology applied toswitchgear and controlgear have been published by WG B3.02 of CIGRE Study Committee B3

[1]1. This information is used to revise IEC 61634 into the present technical report.

1 Figures in square brackets refer to the Bibliography .


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HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR


1 Scope

The scope of this technical report is to address the procedures for safe and environmentalcompatible handling of SF6 during installation, commissioning, normal and abnormaloperations, disposal at the end-of-life of high-voltage switchgear and controlgear. Storage andtransportation of SF6 are also covered.

These procedures should be regarded as minimum requirements to ensure the safety ofpersonnel working with SF6 and to minimize the SF6 emission to the environment.

This technical report generally applies also to gas mixtures containing SF6.

NOTE 1 For the use of this technical report, the term high voltage (reference IEV 601-01-27) is the ratedvoltage above 1 000 V. However, the te rm medium voltage (reference IEV 601-01-28) is commonly used fordistribution systems with voltages above 1 kV and generally applied up to and including 52 kV.

NOTE 2 Throughout this technical report, the term electric power equipment stands for high-voltage andmedium voltage switchgear and/or controlgear.

2 Normative references

The following referenced documents are indispensable for the application of this technical

report. For dated references, only the edition cited applies. For undated references, the latestedition of the referenced document (including any amendments) applies.

IEC 60050-441, International Electrotechnical Vocabulary (IEV) Part 441: Switchgear,

controlgear and fuses

IEC 60376, Specification of technical grade sulphur hexafluoride (SF6) for use in electricalequipment

IEC 60480, Guidelines for the checking and treatment of sulphur hexafluoride (SF6) takenfrom electrical equipment and specifications for its reuse

IEC 62271-1, High-voltage switchgear and controlgear Part 1: Common specifications

IEC 62271-100, High-voltage switchgear and controlgear Part 100: A lternating-currentcircuit-breakers


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9.1 Rcupration et rgnration du SF6 contenu dans tout compartiment desystmes pression entretenue et/ou autonome contenant du SF 6 trsfaiblement ou faiblement dcompos...................................................................110

9.2 Rcupration et rgnration du SF6 contenu dans tout compartiment desystmes pression entretenue et/ou autonome contenant du SF 6

fortement dcompos ..........................................................................................11210 Dmontage de lappareillage lectrique contenant du SF6 en fin de vie........................114

10.1 Fin de vie des systmes pression entretenue et/ou autonome ..........................11510.2 Fin du cycle de vie des systmes pression scells ...........................................115 10.3 Rcupration et rgnration du SF6 en fin de vie des systmes pression

scells................................................................................................................. 11610.4 Dmontage de lappareillage lectrique en fin de vie...........................................11810.5 Produits de dcomposition en fin de vie ..............................................................119

11 Description des appareils de manipulation du SF6 ........................................................12011.1 Groupe de rcupration ....................................................................................... 120

11.1.1 Pr-filtres externes et internes ................................................................. 12111.1.2 Filtres ......................................................................................................12111.1.3 Pompe vide ..........................................................................................12211.1.4 Compresseurs principal et auxiliaire ........................................................ 12311.1.5 Conteneurs de stockage de gaz externes et internes...............................12311.1.6 Evaporateur et appareil de chauffage des conteneurs de stockage de

gaz .......................................................................................................... 12311.1.7 Conduites de gaz et raccord de tuyauteries .............................................124 11.1.8 Instruments de contrle ...........................................................................12411.1.9 Soupapes de sret.................................................................................124

11.2 Raccords de tuyaux flexibles ...............................................................................124 11.3 Dispositifs mobiles de mesure de gaz..................................................................124

11.3.1Appareil de mesure du point de rose ..... ... ... ..... ... ... ..... ... ... ..... ... ... ..... ... . 12511.3.2 Dispositif de mesure du pourcentage de SF6 ...........................................12511.3.3 Tubes ractions sensibles au SO2 ........................................................12511.3.4 Dtecteurs de SF6 mobiles ...................................................................... 12611.3.5 Systmes de dtecteurs de SF6 alarme ................................................126

11.4 Bouteille pour chantillons de gaz ....................................................................... 127Annexe A ( informative) Hexafluorure de soufre ... ... ... ... ..... ... ... ... ..... ... ... ... ..... ... ... ... ... ..... ... 128Annexe B ( informative) Effets du SF6 sur l'environnement ................................................132Annexe C ( informative) Produits de dcomposition du SF

6...............................................135

Annexe D ( informative) Effets potentiels sur la sant des produits de dcomposi tioncontenant du SF6 ................................................................................................................139 Bibliographie.......................................................................................................................159 Figure 1 Mise en service ou nouvelle mise en service des compartiments sous SF6 .......103Figure 2 Remplissage des compartiments pr-remplis de SF6 la pression/densitassigne ............................................................................................................................. 105Figure 3 Nouvelle opration de remplissage du SF6 la pression/densit nominale........107Figure 4 Vrification de la qualit du SF6 sur le site .........................................................108Figure 5 Echantillonnage et transport du SF6 ...................................................................109Figure 6 Rcupration et rgnration du SF6 contenu dans tout compartiment desystmes pression entretenue et/ou autonome contenant du SF6 trs faiblementet/ou faiblement dcompos ...............................................................................................111


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Figure 7 Rcupration et rgnration du SF6 contenu dans tout compartiment desystmes pression entretenue et/ou autonome contenant du SF6 fortementdcompos ......................................................................................................................... 113Figure 8 Fin du cycle de vie des systmes pression entretenue et/ou autonome ...........115 Figure 9 Fin de vie des systmes pression scells........................................................116Figure 10 Rcupration et rgnration du SF6 en fin vie des systmes pressionscells ................................................................................................................................117 Figure 11 Dmontage de lappareillage lectrique ............................................................119Figure 12 Groupe de rcupration polyvalent................................................................... 121Figure A.1 Caractristiques pression/temprature/densit du SF6 [9]...............................129Tableau 1 Mthodes de stockage du SF6 ...........................................................................89 Tableau 2 Types de conteneurs et tiquetage requis pour le stockage et le transportdu SF6 ..................................................................................................................................90Tableau 3 Rglements internationaux applicables au transport du SF6 ..............................91Tableau 4 Mesures appliquer pour toute tche excute sur un appareillagelectrique contenant du SF6..................................................................................................92Tableau 5 Mesures de scurit appliquer lors de louverture et/ou de laccs dansles compartiments................................................................................................................. 94Tableau 6 Solutions neutralisantes .................................................................................... 95Tableau 7 Mesures de scurit supplmentaires ................................................................97Tableau 8 Mise en service ou nouvelle mise en service de compartiments sous SF6 .......104Tableau 9 Remplissage des compartiments pr-remplis de SF6 la pression/densitassigne ............................................................................................................................. 106Tableau 10 Nouvelle opration de remplissage du SF6 la pression/densitnominale ............................................................................................................................. 107Tableau 11 Vrification de la qualit du SF6 sur le site .................................................... 108Tableau 12 Echantillonnage et transport du SF6 ..............................................................110Tableau 13 Rcupration et rgnration du SF6 contenu dans tout compartiment desystmes pression entretenue et/ou autonome contenant du SF6 trs faiblementet/ou faiblement dcompos ...............................................................................................112 Tableau 14 Rcupration et rgnration du SF6 contenu dans tout compartimentde systmes pression entretenue et/ou autonome contenant du SF 6 fortementdcompos ......................................................................................................................... 114Tableau 15 Rcupration du SF6 en fin de vie des systmes pression scells .............118Tableau 16 Caractristiques du SF6 et quantit de produits de dcompositionprvisibles .......................................................................................................................... 120Tableau 17 Modles de filtres types utiliss lors de la rgnration du SF6 .....................122Tableau 18 Dispositifs de mesure de gaz .........................................................................124Tableau A.1 Principales caractristiques chimiques du SF6 [9] ........................................128Tableau A.2 Principales caractristiques physiques du SF6 [9] ........................................130Tableau A.3 Principales caractristiques lectriques du SF6 [9].......................................130 Tableau D.1 Valeurs TLV pour les gaz SOF2, SO2, HF et S2F10......................................143Tableau D.2 Rsultats des calculs donns titre d'exemple dans les casdchappement ...................................................................................................................146Tableau D.3 Rsultats pour les cas dchappement, en tenant compte de l'hydrolysedu SOF2 .............................................................................................................................147


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Tableau D.4 Exemple de calcul de concentration de S2F10 en cas de dchargespartielles.............................................................................................................................148 Tableau D.5 Exemple de calcul de concentration de S2F10 pour les cas dedcharges par leffet couronne............................................................................................149 Tableau D.6 Exemple de calcul de concentration de S2F10 en cas de coupurecapacitive de sectionneur ...................................................................................................150Tableau D.7 Exemple de calcul de concentrations de SOF2en cas de dfaut interne.......151Tableau D.8 Volume des appareillages et pression de remplissage ................................. 155Tableau D.9 Valeurs dnergie d'arc en cas de coupure de courant ................................. 155Tableau D.10 Valeurs dnergie d'arc en cas de dfauts internes .................................... 156Tableau D.11 Taux de formation de SOF2 ........................................................................ 156Tableau D.12 Quantits de SOF2 form...........................................................................157Tableau D.13 Taux dchappement de SF6 ....................................................................... 157Tableau D.14 Taux dchappement de SOF

2.................................................................... 157


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COMMISSION LECTROTECHNIQUE INTERNATIONALE____________

APPAREILLAGE HAUTE TENSION

Partie 303: Utilisation et manipulationde lhexafluorure de soufre (SF6)

AVANT-PROPOS

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responsable de ne pas avoir identifi de tels droits de proprit et de ne pas avoir signal leur existence.

La tche principale des comits dtudes de la CEI est dlaborer des normes internationales.Un comit dtudes peut toutefois proposer la publication dun rapport technique lorsquil arecueilli des donnes dune nature diffrente de celles qui sont gnralement publies sous laforme de norme internationale, par exemple tat de la technique .

La CEI 62271-303, qui est un rapport technique, a t tablie par le sous-comit 17A:Appareillage haute tension, du comit d tudes 17 de la CEI: Apparei llage.

Cette premire dition de la CEI/TR 62271-303 annule et remplace la premire dition de laCEI 61634 publie en 1995. Cette dition constitue une rvision technique.

La prsente dition inclut les modifications techniques significatives suivantes par rapport ldition prcdente.


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84 TR 62271-303 CEI:2008

INTRODUCTION

La technologie SF6 est utilise dans l'appareillage lectrique depuis plus de 30 ans. Elle estprincipalement utilise dans les appareillages lectriques dont la tension assigne estsuprieure 1 kV jusqu'aux plus hautes tensions assignes pour lesquelles l'appareillagelectrique est fabriqu. On estime plusieurs millions le nombre de diffrents typesd'appareillages lectriques remplis au SF6 en service actuellement.

Il existe trois mthodes techniques de confinement du gaz, conformment la CEI 62271-1:

systme pression entretenue;

NOTE 1 Les systmes pression entretenue ne sont plus utiliss pour les nouveaux appareillages lectriques, enraison du taux dchappement inacceptable quils gnrent (voir CEI 62271-203).

systme pression autonome: appareillage lectrique moderne trs haute tension. Lesvaleurs normalises relatives aux taux dchappement sont de 0,5 % et 1 % par an et parcompartiment remplissage de gaz;

systme pression scell: appareillage lectrique moderne moyenne tension (dsignssous lappellation commerciale produits scells vie ou systmes hermtiquementferms ). L'tanchit des systmes pression scells est dfinie par leur dure de viethorique. La dure de vie thorique eu gard la performance aux chappements estspcifie par le constructeur. Des dures de vie de 20, 30 et 40 ans constituent desvaleurs prfrentielles.

NOTE 2 Pour satisfaire lexigence relative la dure de vie thorique, le taux dchappement des systmes pression scells contenant du SF6 est considr tre infrieur 0,1% par an.

La longue exprience d'utilisation du SF6 dans les appareillages lectriques montre quilconvient dadopter un certain nombre de mesures de scurit et de procdures lmentairespour que ladite utilisation se rvle positive au niveau du fonctionnement, de la scurit et de

lenvironnement, et ce, sous la forme suivante: fonctionnement en toute scurit des appareillages lectriques;

optimisation des ressources et des outils requis;

rduction au minimum de la dure hors service des appareillages lectriques;

formation normalise du personnel qui manipule le SF6;

rduction de la quantit de gaz chapp au cours des oprations de manipulation jusqula limite fonctionnelle des quipements de rcupration;

absence de tout chappement volontaire, par exemple rinage latmosphre;

rduction au minimum des chappements de SF6 au cours des mise en service, entretien,

fonctionnement et traitement de fin de vie.Les toutes dernires recommandations pratiques concernant lutilisation de la technologie SF6applique aux appareillages lectriques ont t publies rcemment par le GT B3.02 duComit dtudes B3 du CIGRE [1]1. Ces informations ont servi la rvision de la CEI 61634dans le prsent rapport technique.

1 Les chiffres entre crochets font rfrence la Bibliographie.


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TR 62271-303 CEI:2008 85

APPAREILLAGE HAUTE TENSION

Partie 303: Utilisation et manipulationde lhexafluorure de soufre (SF6)

1 Domaine d'application

Le prsent rapport technique a pour objectif de traiter des procdures de manipulation duSF6, en toute scurit et en toute compatibilit avec lenvironnement, au cours delinstallation, de la mise en service, dun fonctionnement normal et anormal ou de lliminationen fin de vie des appareillages lectriques haute tension. Le stockage et le transport du SF 6sont galement couverts.

Il convient de considrer ces procdures comme les exigences minimales ncessaires pourgarantir la scurit du personnel travaillant avec le SF6 et pour rduire au minimum lesmissions de SF6 dans lenvironnement.

De mme, le prsent rapport technique sapplique, gnralement, aux mlanges gazeuxcontenant du SF6.

NOTE 1 Pour lutilisation du prsent rapport technique, le terme haute tension (rfrence VEI 601-01-27)dsigne la tension assigne suprieure 1 000 V. Toutefois, le te rme moyenne tension (rfrence VEI 601-01-28) est utilis couramment pour les systmes de distribution dont les tensions sont suprieures 1 kV etgnralement appliques jusques et y compris 52 kV.

NOTE 2 Dans lensemble du prsent rapport technique, le terme appareillage lectrique dsigne les appareillages haute et moyenne tension .

2 Rfrences normatives

Les documents de rfrence suivants sont indispensables pour lapplication du prsentrapport technique. Pour les rfrences dates, seule ldition cite sapplique. Pour lesrfrences non dates, la dernire dition du document auquel il est fait rfrence (y comprisles ventuels amendements) sapplique.

CEI 60050-441, Vocabulaire Electrotechnique International (VEI) Partie 441: Appareillageset fusibles

CEI 60376, Spcifications de la qualit technique de lhexafluorure de soufre (SF6) pourlutilisation dans les appareils lectriques

CEI 60480, Lignes directrices relatives au contrle et au traitement de l'hexafluorure desoufre (SF6) prlev sur lquipement lectrique et spcification en vue de sa rutil isation

CEI 62271-1,Appareil lage haute tension Par tie 1: Spcifications communes

CEI 62271-100, Appareill age haute tension Partie 100: Disjoncteurs courant alternatif

SF6 handling.pdf

Documents

Transcript of SF6 handling.pdf