建筑物防雷设计规范GB50057教学文稿.ppt

建筑物防雷设计规范GB50057教学文稿.pptLightning&SurgeProtection雷电及过电压保护讲座蔡振新(高工)12中国各主要城市雷暴天数地名平均全年日期最早初日(日/月)最晚终日(日/月)/210//33//33//410/104建筑物被烧毁5电路板及元器件损坏6配电柜被损坏7雷暴引起感应雷击及过电压直击雷或邻近雷击:击在外部防雷系统,如保护框架(工业装置上.)电缆上等。浪涌电流在接地电阻Rst上引起电压降。闭合环路感应产生过电压信息系统电源系统L1L2L3PEN20kVRst2c1a1b12a2b11a1b远处雷击:击在远处架空输送线缆上雷云之间的放电通过架空线缆引起感应雷电波及过电压。在野外,雷电击中通信线缆2a2b2c8邻近建筑物之间危险的浪涌雷击几100kA几10kV几100kV几kA几10kA几10kV通信线缆OV230V~几10kA几kAWater/Gas几kA几几kA几几kA几230V9StandardIEC61024ProtectionofstructuresagainstlightningStandardIEC61312ProtectionagainstLEMPStandardIEC61643Lightningprotection-municationlinesTechnicalReportIEC61662AssessmentofriskofdamageduetolightningPublished:1995-04Amendment1toIEC61662Published:1996-05TechnicalReportIEC61819/:2001TRPart1:GeneralprinciplesIEC61024-1Published:1990-03Section1:GuideASelectionofprotectionlevelsforlightningprotectionsystemsIEC61024-1-1Published:1993-08Section2:GuideBDesign,installation,maintenanceandinspectionoflightningprotectionsystemsPublished:1998-05Part1:GeneralprinciplesIEC61312-1Published:1995-02Part2(technicalspecification):Shieldingofstructure,bondinginsidestructureandearthingIEC61312-2TSPublished:1999-08Part3(technicalspecification):Requirementsofsurgeprotectivedevices(SPDs)IEC61312-3TSPublished:2000-07Amendment1:AnnexDCoordinationofSPDwithinexistingstructuresIEC81/150/CDForecast:2001Part4(TechnicalReport):ProtectionofequipmentinexistingstructuresPublished:1998-09IECTC81雷电保护Part1:FibreopticinstallationsIEC61643-1Published:1999-07Part2:onductorsIEC81/164/FDISForecast2001Part5:ApplicationGuideIEC81/165/CDForecast:2000IEC61024-1/,explosionandlifehazardsIEC81/151/CDVStatus:MCRcirculatedForecast:2001IEC61662/:200110