nema与ip防护等级的对照比较

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1、NEMA与IP防护等级的对照比较Postedon星期三,23九月2009byadmin1COMMENTBOOKMARKNEMA/IPEnclosureTypes:TheNationalElectricalManufacturersAssociation(NEMA)providesdescriptions,classifications,andtestcriteriarelatingtoenclosuresforelectricalequipment.Tables12-13,12-14,and12-15compareth

2、especificapplicationsofenclosuresforindoorandoutdoornonhazardouslocationsandindoorhazardouslocations.NEMA防护等级，是美国电气制造商协会工业控制装置和系统中的外壳防护标准。NEMA的防护标准除了防尘、防水之外，还包括防爆（IP代码只包括防尘和防水）。SpecificApplicationsofEnclosuresforIndoorNonhazardousLocationsNEMA的防护场合ProvidesaDegre

3、eofProtectionAgainsttheFollowingEnvironmentalConditionsTypeofEnclosure1*2*44X566P1212K13IncidentalcontactwiththeenclosedequipmentXXXXXXXXXXFallingdirtXXXXXXXXXXFallingliquidsandlightsplashing XXXXXXXXXCirculatingdust,lint,fibers,andflyings**  XX XXXXXSettlingair

4、bornedust,lint,fibers,andflyings**  XXXXXXXXHosedownandsplashingwater  XX XX   Oilandcoolantseepage       XXXOilorcoolantsprayingandsplashing         XCorrosiveagents   X  X   Occasionaltemporarysubmersion     XX   Occasionalprolongedsubmersion      X   *Theseen

5、closuresmaybeventilated.However,Type1maynotprovideprotectionagainstsmallparticlesoffallingdirtwhenventilationisprovidedintheenclosuretop.Consultthemanufacturer.**ThesefibersandflyingsarenonhazardousmaterialsandarenotconsideredClassIIItypeignitablefibersorcombust

6、ibleflyings.ForClassIIItypeignitablefibersorcombustibleflyings,seetheNationalElectricalCode,Article500.ProvidesaDegreeofProtectionAgainsttheFollowingEnvironmentalConditionsTypeofEnclosure33R*3S44X66PIncidentalcontactwiththeenclosedequipmentXXXXXXXRain,snow,andsl

7、eet**XXXXXXXSleet***  X    WindblowndustX XXXXXHosedown   XXXXCorrosiveagents    X XOccasionaltemporarysubmersion     XXOccasionalprolongedsubmersion      X*Theseenclosuresmaybeventilated.**Externaloperatingmechanismsarenotrequiredtobeoperablewhentheenclosureisi

8、cecovered.***Externaloperatingmechanismsareoperablewhentheenclosureisicecovered.ProvidesaDegreeofProtectionAgainstAtmospheresTypicallyContaining:* Type7and8Enclosures