Exicircuitsbi德和盛油气站防雷讲座

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1、KonferenzJurata2009Surgeprotectionforintrinsicallysafecircuits本质安全电路电涌保护www.dehn.deKonferenzJurata2009Acircuitisintrinsicallysafeifnosparkandthermaleffect,whichoccurunderdefinedexperimentalconditions(includingnormaloperationandcertainfaultconditions),canigniteacertainexplosiveatmosphere.如

2、果一个电路在某实验条件下(包括正常工作和故障情形),不会产生能导致爆炸气体点火的闪络和温度变化,这样的电路是本质安全的.Measuringandcontroltechnology,communicationtechnology测控技术,通信技术Basicprinciple:/基本原则Application:/应用IntrinsicsafetyExiinaccordancewithEN60079-11,2007-01本质安全电路EXi,根据EN60079-11,2007-01KonferenzJurata2009“Lightningisnotintrinsicallys

3、afe!!!“雷击不是本质安全KonferenzJurata20091.Lightningasanignitionsource/雷击为点火源一种2.LightningprotectionsystemsinaccordancewithEN62305inhazardousareas根据62305危险区域防雷系统3.Designofintrinsicallysafecircuits本质安全电路设计4.Selectionofsurgeprotectivedevices电涌保护器选型a)withgalvanicisolation/电隔离b)withoutgalvanicisolat

4、ion/非电隔离KonferenzJurata20091.Lightningasanignitionsource/雷击为点火源一种2.LightningprotectionsystemsinaccordancewithEN62305inhazardousareas根据62305危险区域防雷系统3.Designofintrinsicallysafecircuits本质安全电路设计4.Selectionofsurgeprotectivedevices电涌保护器选型a)withgalvanicisolation/电隔离b)withoutgalvanicisolation/非电隔

5、离KonferenzJurata2009EN1127-1:2007“Explosiveatmospheres-Explosionpreventionandprotection-Part1:Basicconceptsandmethodology“EN1127-1:2007“爆炸环境-防爆及保护-第1部分:基本概念及方法Thefollowingpossibleignitionsourcesarespecifiedinthestandard:标准中列举了以下可能的点火源:-Flamesandhotgases/明火及高温气体-Hotsurfaces/高温表面-Mechanica

6、llygeneratedsparks/机械引起的火星-Elecricalapparatus/电器设备-Strayelectriccurrents/杂散电流-Staticelectricity/静电-Lightning/雷击-Electromagneticwaves/电磁波-Ionisingradiation/离子辐射-Ultrasonics/超音波KonferenzJurata2009Controlroom/控制室LookingforSourcesofIgnitions确定点火源Non-hazardousareaHazardousarea/危险区域1IN2I.S.Barr

7、ier/安全栅explosionprotectionzone0防爆分区0explosionprotectionzone1,2防爆分区1,2S1KonferenzJurata2009Controlroom/控制室LookingforSourcesofIgnitions确定点火源Non-hazardousareaHazardousarea/危险区域1IN2I.S.Barrier/安全栅explosionprotectionzone0防爆分区0explosionprotectionzone1,2防爆分区1,2S1Ko