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ID:40083481
大小:52.91 KB
页数:6页
时间:2019-07-20
《LIGHTNING PROTECTION》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、(Feb2003)LIGHTNINGPROTECTIONINSTALLATIONGENERALSPECIFICATION1.SATISFACTORYINSTALLATIONThewholeoftheinstallationshallbecarriedoutinaccordancewith:(a)ThelatestS.A.B.S.CodeofPracticefortheProtectionofStructuresagainstLightning-S.A.B.S.03;SABSIEC61024(1),61024(1-1);SABSIEC61312(1);SABSIEC61662&
2、NRS042.(b)TheKwaZulu-NatalDepartmentofWorksGeneralElectricalSpecification.(c)TheMunicipalBy-LawsandanyotherspecialrequirementsasdeemednecessarybytheLocalSupplyAuthority;(d)LocalFireRegulations.2.S.A.B.S.APPROVEDDRAWINGSSABSApproveddrawingsarenotrequiredforthisproject.3.TESTONCOMPLETIONUponc
3、ompletionofthelightningprotectionsystem,thefollowingtestsshallbewitnessedbyanappointedrepresentativeoftheEmployer.TheresultsshallberecordedonsuitabletestcertificateswhichmustbesignedbyboththeContractorandtheEmployersrepresentative.Asketchmustbeincludedoneachtestcertificateindicatingtheposit
4、ionsofeachearthelectrodeinrelationtosomepermanentreferencepoint.Itmustalsoindicatethepositionsatwhichtestswerecarriedout,thetypeoftestandtheresultsofthesetests.3.1EarthResistanceTestTheEarthResistanceTestshallinvolvemeasuringtheresistancetoearthofeachrod-typeelectrode,orgroupofrod-typeelect
5、rodes,ortrenchearthwhichwouldnormallybeconnectedtoonedown-conductororearthterminal.Thistestmustbemadewiththeelectrodescompletelydisconnectedfromanypartofthestructureorlightningprotectionsystem.3.2ElectricalContinuityTests(a)ExternalDown-ConductorsElectricalcontinuitybetweenthelowerendsofext
6、ernaldown-conductorswhichmustallbedis-connectedfromtheearthingsystemduringthetestshallnotexceed1(one)ohm.(b)MetallicServicesElectricalcontinuitybetweenanymetallicstructuresofservices(e.g.rainwaterpipes)whichformanintegralpartofthelightningprotectionsystemshallnotexceed1(one)ohm.Thesetestssh
7、ouldbecarriedoutwithallothercomponentsofthelightningprotectionsystemdisconnectedfromthecomponentbeingtested.LP/1(Feb2003)4.DESCRIPTIONOFMATERIAL4.1AirTerminalsandDown-conductorsAllconductorsmustbeinaccordancewiththerequirementsofBSS1474orAmericanStandard
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