IEC_61109_Composite_Insulator.pdf

48448910586586180NORMECEIINTERNATIONALEIECINTERNATIONAL1109STANDARD1992AMENDEMENT 1AMENDMENT 11995-04Amendement 1Isolateurs composites destines aux lignesaeriennes a courant alternatif de tensionnominale superieure a 1 000 V-Definitions,methodes dessai et criteresdacceptationAmendment 1Composite insulators for a.c.overheadlines with a nominal voltage greaterthan 1 000 V-Definitions,test methods and acceptancecriteriaCEI 1995 Droits de reproduction reserves-Copyright-all rights reservedBureau Central de la Commission Electrotechnique Intemalionale 3,rue de Varemb6 Gendve,SuisseCommission Electrotechnique InternationaleCODE PRIXInternational Electrotechnical CommissionPRICE CODEEFor prioe,aee current catalogue48448910586587017-2-1109 amend.1CEl:1995AVANT-PROPOSLe present amendement a t tabli par le comit dtudes 36 de la CEI:Isolateurs.Le texte de cet amendement est issu des documents suivants:DISRapport de vote36/115/DIS36/115A/DIS36/119/RVDLe rapport de vote indique dans le tableau ci-dessus donne toute information sur le voteayant abouti a lapprobation de cet amendement.Page 102 References normativesInserer dans la liste existante,les titres des normes suivantes:CEI 707:1981,Mthodes dessai pour valuer Iinflammabilit des matriaux isolantslectriques solides soumis a une source dallumageISO 3452:1984,Essais non destructifs-Controle par ressuage-Principes gnrauxPage 185 Essais de conceptionAjouter,a la page 28,les nouveaux paragraphes suivants:5.5 Essai dinflammabiliteCet essai a pour but dvaluer les proprits dallumage et dextinction du matriau derevetement.5.5.1 Methode dessaiCet essai doit tre effectue conformement a la methode FV de la CEI 707.5.5.2 Sanction de lessaiLessai est considere comme passe avec succes si le specimen essaye appartient a lacategorie FVO de la CEI 707.48448910586588T531109 Amend.1IEC:1995-3-FOREWORDThis amendment has been prepared by IEC technical committee 36:Insulators.The text of this amendment is based on the following documents:DISReport on voting36/115/DIS36/115A/DIS36/119/RVDFull information on the voting for the approval of this amendment can be found in thereport on voting indicated in the above table.Page 112 Normative referencesInsert,in the existing list,the titles of the following standards:IEC 707:1981,Methods of test for the determination of the flammability of solid electricalinsulating materials when exposed to an igniting sourceISO 3452:1984,Non-destructive testing-Penetrant inspection-General principlesPage 195 Design testsAdd,on page 29,the following new subclauses:5.5 Flammability testThis test is intended to check the housing material for ignition and self-extinguishingproperties.5.5.1 Test procedureThe test shall be performed according to IEC 707,method FV.5.5.2 Evaluation of the testThe test is passed if the test specimen belongs to category FVO indicated in IEC 707.4844891058658999T-4-1109 amend.1 CEl:1995Page 286 Essals de typeRemplacer a la page 30,le titre et le texte du 6.4 par ce qui suit:6.4 Essai mecanique charge-temps et essai detancheite de Iinterface entreles extremites metalliques et le revetement de lisolateur6.4.1 Specimens dessaiQuatre isolateurs pris sur la chaine de production doivent etre essayes.Dans le casdisolateurs longs,des specimens,assembles sur la chaine de production,peuvent etrefabriques,ayant une longueur isolante(distance entre ferrures)dau moins 800 mm.Lesdeux extremites metalliques doivent etre les memes que sur les isolateurs de productionstandard.Les extremites metalliques doivent etre assemblees de telle sorte que la partieisolante entre les extremites et Iailette la plus proche soit egale a celle de lisolateur de lachaine de production.Les isolateurs doivent etre examines visuellement et on controleraque leurs dimensions sont conformes aux plans.Ils doivent etre ensuite soumis a lessaimecanique individuel suivant 8.3.6.4.2 Deroulement de Iessaia)Les quatre specimens sont soumis a une charge de traction appliquee entre lescouplages,a temperature ambiante.La charge est augmente rapidement,mais sans a-coups,de zero jusqua 70%de la CMS.et ensuite maintenue a cette valeur pendant 96 h.b)Les deux extremites de Iun des quatre specimens doivent etre soumises,a la findes 96 h dessai,a un essai de verification de craquelure,par penetration de colorant.conformement a IISO 3452,sur le revetement sur une zone comprenant la longueurtotale de Iinterface entre ferrure et revetement,et setendant sur une surface addi-tionnelle suffisante au-dela de lextremite de la ferrure.On doit proceder de la facon suivante:la surface doit etre prealablement nettoyee a laide dun agent nettoyant;le liquide colorant,qui doit agir pendant 20 min,doit etre appliqu sur la surface propre;la surface doit etre debarrassee de lexces de colorant et sechee;-Iagent revelateur doit etre applique.si necessaire:la surface doit etre controlee.Le colorant peut penetrer certains materiaux de revetement.Dans de tels cas,il faudraen apporter la preuve pour valider Iinterpretation des resultats.Apres cet essai de penetration.les specimens doivent etre contr6les.Si des craque-lures apparaissent,le revetement et,si necessaire,les extremites metalliques ainsi quele noyau doivent etre coupes en deux moities,perpendiculairement a la plus large descraquelures revelees,en son milieu.La surface des deux moities doit etre ensuiteexaminee pour connaitre la profondeur de la craquelure.c)Les trois autres specimens sont,ensuite,de nouveau soumis a une traction appliqueeentre les couplages a temperature ambiante.La charge est augmentee rapidement,maissans a-coups,de zero jusqua environ 75%de la CMS,et ensuite augmentee graduel-lement en un temps allant de 30 s a 90 s jusqua la CMS.Si on atteint 100 de laCMS en moins de 90 s,la charge(100%de la CMS)doit etre maintenue pendantle reste des 90 s.(Cet essai est considere comme equivalant a un essai de tenuependant 1 min a la CMS.484489105865906011109 Amend.1IEC:19955Page 296 Type testsReplace,on page 31,the existing title and text of 6.4 by the following:6.4 Mechanical load-time test and test of the tightness of the interface betweenend fittings and insulator housing6.4.1 Test specimensFour insulators taken from the production line shall be tested.In the case of longinsulators,specimens may be manufactured,assembled on the production line,with aninsulation length(metal to metal spacing)not less than 800 mm.Both metal fittings shallbe the same as on standard production insulators.The fittings shall be assembled suchthat the insulating part from the fitting to the closest shed should be identical to that of theproduction line insulator.The insulators shall be examined visually and checked that thedimensions conform with the drawing and then be subjected to the mechanical routine testaccording to 8.3.6.4.2 Performance of the testa)The four specimens are subjected to a tensile load applied between the couplings atambient temperature.The tensile load shall be increased rapidly but smoothly fromzero up to 70%of the SML and then maintained at this value for 96 h.b)Both ends of one of the four specimens shall,at the end of the 96 h test,be sub-jected to crack indication,by dye penetration,in accordance with ISO 3452,on thehousing in the zone embracing the complete length of the interface between thehousing and metal fitting and including an additional area,sufficiently extended,beyond the end of the metal part.The indication shall be performed in the following way:-the surface shall be properly pre-cleaned with the cleaner;-the penetrant,which shall act during 20 min,shall be applied on the cleaned surface;-the surface shall be cleaned with the excess penetrant removed and dried;-the developer shall be applied,if necessary;-the surface shall be inspected.Some housing materials may be penetrated by the penetrant.In such cases evidenceshall be provided to validate the interpretation of the results.After the penetration test the specimen shall be inspected.If any cracks occur,thehousing and,if necessary,the metal fittings and the core shall be cut perpendicularly tothe crack in the middle of the widest of the indicated cracks,into two halves.Thesurface of the two halves shall then be investigated for the depth of the cracks.c)The three remaining specimens are then again subjected to a tensile load appliedbetween the couplings at ambient temperature.The tensile load shall be increasedrapidly but smoothly from zero to approximately 75%of the SML and then graduallyincreased in a time between 30 s to 90 s to the SML.If 100%of the SML is reachedin less than 90 s,the load(100%of SML)shall be maintained for the remainder ofthe 90 s.(This test is considered to be equivalent to a 1 min withstand test at SML.)