【英文标准名称】:Explosiveatmospheres-Protectionofequipmentandtransmissionsystemsusingopticalradiation
【原文标准名称】:爆炸性环境.光辐射设备和传输系统的保护
【标准号】:BSEN60079-28-2007
【标准状态】:现行
【国别】:英国
【发布日期】:2007-05-31
【实施或试行日期】:2007-05-31
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:环境;元部件;结构要求;尺寸规格;电气工程;电驱动装置;设备;防爆;爆炸性环境;纤维光学;可燃性环境;点火;点火防护装置;点火试验;检验;作标记;光辐射;防护电气设备;保护设备;辐射;规范(验收);温度;温度极限;测试;传输系统;波辐射
【英文主题词】:Atmosphere;Components;Constructionrequirements;Dimensions;Electricalengineering;Electrically-operateddevices;Equipment;Explosionprotection;Explosiveatmospheres;Fibreoptics;Flammableatmospheres;Ignition;Ignitionprotection;Ignitiontest;Inspection;Marking;Opticalradiation;Protectedelectricalequipment;Protectiondevices;Radiation;Specification(approval);Temperature;Temperaturelimit;Testing;Transmissionsystems;Waveradiation
【摘要】:ThispartofIEC60079explainsthepotentialignitionhazardfromequipmentusingopticalradiationintendedforuseinexplosivegasatmospheres.Italsocoversequipment,whichitselfislocatedoutsidebutitsemittedopticalradiationenterssuchatmospheres.Itdescribesprecautionsandrequirementstobetakenwhenusingopticalradiationtransmittingequipmentinexplosivegasatmospheres.Italsooutlinesatestmethod,whichcanbeusedtoverifyabeamisnotignitioncapableunderselectedtestconditions,iftheopticallimitvaluescannotbeguaranteedbyassessmentorbeamstrengthmeasurement.Thisstandardcontainsrequirementsforopticalradiationinthewavelengthrangefrom380nmto10μm.Itcoversthefollowingignitionmechanisms:opticalradiationisabsorbedbysurfacesorparticles,causingthemtoheatupand,undercertaincircumstances,thismayallowthemtoattainatemperaturewhichwilligniteasurroundingexplosiveatmosphere;directlaserinducedbreakdownofthegasatthefocusofastrongbeam,producingplasmaandashockwavebotheventuallyactingastheignitionsource.Theseprocessescanbesupportedbyasolidmaterialclosetothebreakdownpoint.Thisstandarddoesnotcoverignitionbyultravioletradiationandbyabsorptionoftheradiationintheexplosivemixtureitself.Explosiveabsorbersorabsorbersthatcontaintheirownoxidizeraswellascatalyticabsorbersarealsooutsidethescopeofthisstandard.Thisstandardspecifiesrequirementsforequipmentintendedforuseunderatmosphericconditions.ThisstandardsupplementsandmodifiesthegeneralrequirementsofIEC60079-0.WherearequirementofthisstandardconflictswitharequirementofIEC60079-0,therequirementofthisstandardwilllltakeprecedence.
【中国标准分类号】:K35
【国际标准分类号】:29_260_20
【页数】:40P.;A4
【正文语种】:英语