s7300_dp_principles_explosion_protection_system_ma

PrinciplesofExplosionProtection__________________________________________________________________________________________________________________SIMATICPrinciplesofExplosionProtectionSystemManual06/2010A5E00206201-03Preface1Productoverview2Planning3Commissioning(hardware)4Repairandmaintenance5AppendixALegalinformationLegalinformationWarningnoticesystemThismanualcontainsnoticesyouhavetoobserveinordertoensureyourpersonalsafety,aswellastopreventdamagetoproperty.Thenoticesreferringtoyourpersonalsafetyarehighlightedinthemanualbyasafetyalertsymbol,noticesreferringonlytopropertydamagehavenosafetyalertsymbol.Thesenoticesshownbelowaregradedaccordingtothedegreeofdanger.DANGERindicatesthatdeathorseverepersonalinjurywillresultifproperprecautionsarenottaken.WARNINGindicatesthatdeathorseverepersonalinjurymayresultifproperprecautionsarenottaken.CAUTIONwithasafetyalertsymbol,indicatesthatminorpersonalinjurycanresultifproperprecautionsarenottaken.CAUTIONwithoutasafetyalertsymbol,indicatesthatpropertydamagecanresultifproperprecautionsarenottaken.NOTICEindicatesthatanunintendedresultorsituationcanoccurifthecorrespondinginformationisnottakenintoaccount.Ifmorethanonedegreeofdangerispresent,thewarningnoticerepresentingthehighestdegreeofdangerwillbeused.Anoticewarningofinjurytopersonswithasafetyalertsymbolmayalsoincludeawarningrelatingtopropertydamage.QualifiedPersonnelTheproduct/systemdescribedinthisdocumentationmaybeoperatedonlybypersonnelqualifiedforthespecifictaskinaccordancewiththerelevantdocumentationforthespecifictask,inparticularitswarningnoticesandsafetyinstructions.Qualifiedpersonnelarethosewho,basedontheirtrainingandexperience,arecapableofidentifyingrisksandavoidingpotentialhazardswhenworkingwiththeseproducts/systems.ProperuseofSiemensproductsNotethefollowing:WARNINGSiemensproductsmayonlybeusedfortheapplicationsdescribedinthecatalogandintherelevanttechnicaldocumentation.Ifproductsandcomponentsfromothermanufacturersareused,thesemustberecommendedorapprovedbySiemens.Propertransport,storage,installation,assembly,commissioning,operationandmaintenancearerequiredtoensurethattheproductsoperatesafelyandwithoutanyproblems.Thepermissibleambientconditionsmustbeadheredto.Theinformationintherelevantdocumentationmustbeobserved.TrademarksAllnamesidentifiedby®areregisteredtrademarksoftheSiemensAG.Theremainingtrademarksinthispublicationmaybetrademarkswhoseusebythirdpartiesfortheirownpurposescouldviolatetherightsoftheowner.DisclaimerofLiabilityWehavereviewedthecontentsofthispublicationtoensureconsistencywiththehardwareandsoftwaredescribed.Sincevariancecannotbeprecludedentirely,wecannotguaranteefullconsistency.However,theinformationinthispublicationisreviewedregularlyandanynecessarycorrectionsareincludedinsubsequenteditions.SiemensAGIndustrySectorPostfach484890026NÜRNBERGGERMANYA5E00206201-03Ⓟ08/2010Copyright©SiemensAG2010.TechnicaldatasubjecttochangePrinciplesofExplosionProtectionSystemManual,06/2010,A5E00206201-033Tableofcontents1Preface......................................................................................................................................................71.1Preface...........................................................................................................................................72Productoverview.....................................................................................................................................112.1Introduction..................................................................................................................................112.2Explosiveatmosphere..................................................................................................................122.2.1Definition......................................................................................................................................122.2.2Explosion-relatedcharacteristics.................................................................................................122.2.2.1Gases...........................................................................................................................................122.2.2.2Dusts............................................................................................................................................132.2.2.3Concentrationofflammablesubstances......................................................................................142.2.3Presenceofahazardousamount................................................................................................162.2.4Efficiencyoftheignitionsource...................................................................................................162.3Protectivemeasures....................................................................................................................173Planning...................................................................................................................................................193.1Directivesand