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【英文标准名称】:Overheadlines-Calculationoftheelectricalcomponentofdistancebetweenlivepartsandobstacles-Methodofcalculation
【原文标准名称】:架空电线.带电部分和障碍物间距离的电气元件的计算.计算方法
【标准号】:BSIEC61865-2002
【标准状态】:现行
【国别】:英国
【发布日期】:2002-03-29
【实施或试行日期】:2002-03-29
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:距离;导电体;定义;定义;电气工程;数学计算;架空线;障碍;裸的
【英文主题词】:Bare;Definition;Definitions;Distances;Electricconductors;Electricalengineering;Mathematicalcalculations;Obstacles;Overheadpowerlines
【摘要】:ThisInternationalStandardprovidesguidanceforthecalculationofelectricaldistancesbetweenliveandearthedpartsrequiredtopreventair-gapbreakdownwhichmayendangermembersofthepublicwholegitimatelycomeclosetoliveparts.Itisapplicableonlytooverheadlinesdesignedtooperateatmorethan45kVphase-to-phasea.c.Itdealswiththeelectricalcomponentofdistancesbetweenconductorsandmovableobjects-vehiclesontheground,vesselsonwater,personsontopofobjectsorontheground,wildlifeontheground(butnotairborne),etc.Thisstandarddoesnotdealwiththefollowingpublicandworkersafetyaspects:·stationaryobjects-structuresbeneathornexttolines,trees,groundcontours,etc.These,ingeneral,requireconsiderationastowhetherthestructurecanbeclimbedon,theextenttowhichthetreewillgrow,etc;·minimumapproachdistanceforliveworking,whichisdealtwithinIEC61472;·capacitivecouplingormagneticinductionbyoverheadlines,suchasvoltagesinducedinvehiclesunderaline,orinpipelinesburiedalongsideit;·currentsflowinginthegroundthatoriginatefromlinesandresultinstepandtouchvoltagesaroundstructuresduringlinefaultsorlightningstrikes;·flashoveroflineinsulatorsorsparkgaps,oraphase-to-phasedischarge,resultinginaudibleandelectricalnoiseandintensearcs;·dielectricbreakdownoftheairbetweentheconductorsandthegroundduetolargefiresbeneathconductors;·minimumelectricaldistancesrequiredtopreventdischargetoadjacentoverheadpowerorcommunicationcircuits.Thisstandarddoesnotgivetheelectricaldistancerequirementsforthedesignofoverheadlinestructures.Neitherdoesitgivethedistancerequirementsforoverheadlinestructureswhichneedtobeaccessibletoworkerswhilethelineisenergized(forexample,distancestolineworkersorpainters).Distancesbetweenconductorsandthestructureofthetowerarenormallychosentomeettherequiredoperatingreliabilityoftheline.Itispossiblethatthisdistancemaynotalwaysbeadequatetoallowliveworkingor,insomecases,accessforworkerstopartsofthestructureneartoliveconductors.
【中国标准分类号】:F21
【国际标准分类号】:29_240_20
【页数】:26P;A4
【正文语种】:英语