GE系列PDU原理文档

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1、LastRevised:December2004Thismodulecontainsthefollowingsections:·Section1-Overview·Section2-NGPDUPhysicalDescription·Section3-NGPDUServiceOverview·Section4-NGPDUElectricalSpecifications·Section5-NGPDUDrawings·Section6-NGPDULEDs·Section7-NGPDUControlBoard

2、SwitchesandFuses1  OverviewThePDUprovidesasinglelocationtoconnectinputpowerfortheentireCTsystem.ItsfunctionistoprovidethefollowingfeaturestotheSystem:·Compensationmeansforawiderangeofinputvoltagesviatapselection·ProviderequiredsystemACpowerfromasingleso

3、urce·ProvideHighVoltageDCpowerforx-raygeneration·Providepowerforgantryaxialrotation·Provideameansforemergencyshutdownofallx-rayanddrivespowercircuits·ProvidesystemACpowercircuitprotection·ProvideaninterfaceforanexternalUPSconnection·Meettherequirementso

4、fIEC601forbothradiatedandconductedemissionsThePDUisdesignedtocomplywithUnitedStatesFederalRegulationsandtheEuropeanMedicalDeviceDirective.ItbearsthecertificationmarksofaUnitedStatesNationalRecognizedTestLaboratorywithCanadiandeviationoraCanadiancertifie

5、dtesthouse.Eachunitisidentifiedasbeingincompliancebybeinglabeledwiththeofficialmark(s)ofeachrespectiveagency.Whileinthestand-bymode,theNGPDUdoesnotgeneratesoundlevelsinexcessof50dbA,whenmeasuredatadistanceofonemeterfromthenearestcabinetsurface,inanydire

6、ction.2  NGPDUPhysicalDescription2.1  MechanicalEnclosureTheenclosurehasafront,rearandtopaccesscovers.Thetopcoverisinstalledontheframewithacaptivefastenerinthemiddleoffrontedge.Thefrontcoverweighslessthan22lbs(10kg).Asinglefull-widthLexansafetyshieldisp

7、rovidedunderthefrontcover.Itextends½”belowthetopfrontedgeoftheassemblytothebottomofallHVDCSupplycomponents,includingthePDUControlBoard.Therearcoverisheldinplacebytwocaptivefasteners.Tomaintainagoodhighfrequencygroundbetweeninternalsubassemblies,allinter

8、nalmetalsurfacesaresolidlygroundedtoeachother.TheenclosureispaintedMistGray(GEMSGray#1).2.2  ComponentLocationsThemaininputtransformerislocatedintherearaccessiblechambernearthebottomofthecabinet,allowingenoughroomforcableaccessbe