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1、SEMIE7-91(Reapproved0699)SPECIFICATIONFORELECTRICALINTERFACESFORTHEU.S.ONLYThisspecificationwastechnicallyapprovedbytheGlobalPhysicalInterfaces&CarriersCommitteeandisthedirectresponsibilityoftheNorthAmericanPhysicalInterfaces&CarriersCommittee.Currenteditionapprovedbyth
2、eNorthAmericanRegionalStandardsCommitteeonDecember18,1998.InitiallyavailableonSEMIOnLineApril1999;tobepublishedJune1999.Originallypublished1984,previouslypublished1991.ForJapanelectricalinterfacerequirements,seeSEMIE31.Motors3/4to5HP208V3Ø3.1to16.7AMPs1Introduction230V3
3、Ø2.8to15.2AMPs1.1Intent—ThepurposeofthisstandardistoMotors5HPand480V3Ø7.6AMPsandupsimplifythedesignandimplementationoffutureLargersemiconductorfacilitieswherebothequipmentsuppliersanduserscanbeassuredoftheexactelectricalinterfacesrequired.1.4.3OtherLoads—(ByCalculation)
4、1.2Overview—ThisstandardpresentsrecommendationsfortheselectionofspecificelectricalAmpereRangeforRecommendedVolts&powerinterfaces:Phases·Servicecategoriesbyvoltage,currentandphasePower120V1Ø208V1Ø208V3Ø480V3Øforsystems,motors,andotherelectricalloads0-3000Watts0to250to14A
5、.0to8A.A.·Electricalconnectors3000-5000Watts14to8to14A.·Cordage24A.1.3ApplicableDocumentsandReferences5000-13to30,000Watts83A.NEMA—NationalElectricalManufacturer's130,000and36A.andAssociationAboveupNFPA70-1981—NationalElectricalCode,(NEC)NationalFireProtectionAssociatio
6、n22ElectricalConnectors2.1TheNEMAtypeslistedbelowareavailablein1.4ServiceCategoriesmanyformsfrommanymanufacturers.Forexample,1.4.1Voltage,current,andphaseformotorsandotherthe"receptacle"configurationsshownalsoapplytoelectrical/electronicloads:connectorsandflangedoutlets
7、.1.4.2Motors—(FromArticle430-148,150of2.1.1125Volt,1Ø,20AMPsmax.,straightbladeNationalElectricalCode)PowerRecommendedRecommendedPhase&VoltageCurrentRangeMotors1/6to3/4HP120V1Ø4.4to13.8AMPs208V1Ø2.4to7.6AMPs230V1Ø2.2to6.9AMPs1NationalElectricalManufacturer'sAssociation,2
8、101"L"Street,N.W.,Washington,D.C.200372NationalFireProtectionAssociation,470AtlanticAvenue,Boston,MA022101SEMI
