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這是IEC-60950的空間和爬電距離要求：附表2J–AC交流電源瞬間電壓（摘錄標(biāo)準(zhǔn)表2J）ACmainsupplyvoltageuptoandincludingaMainstransientvoltageVpeakbOvervoltagecategoryVr.m.sIII50330550100500800150c800150030025004000a

Forequipmentdesignedtobeconnectedtoathree-phase,three-wiresupply,wherethereisnoneutralconductor,theACMAINSSUPPLYvoltageistheline-to-linevoltage.Inallothercases,wherethereisaneutralconductor,itistheline-to-neutralvoltage.b

TheMAINSTRANSIENTVOLTAGEisalwaysoneofthevaluesinthetable.Interpolationisnotpermitted.c

Including120/208Vand120/240V.d

Including230/400Vand277/480V.e

Including400/690V.Ingeneral,CLEARANCESinequipmentintendedtobeconnectedtotheACMAINSSUPPLYshallbedesignedforOvervoltageCategoryII.如果所測(cè)的工作電壓峰值超過(guò)下表規(guī)格時(shí)，上述空間距離的值需增加下表所列的對(duì)應(yīng)值附表2K–一次電路以及一次電路與二次電路之間的最小電氣絕緣（摘錄標(biāo)準(zhǔn)表2K）Unit:mmPeakingworkingvoltage

uptoandincluding,

VMainstransientvoltage150025004000Pollutiondegree1and231and231,2and3FB/SRFB/SRFB/SRFB/SRFB/SR710.4120.81.32.61241.32423.26.42100.5120.81.32.61.4241.52423.26.4420F1.5

B/S2.0

R4.02.53.26.4840F3.0

B/S3.2

R6.4

ThevaluesinthetableareapplicabletoFUNCTIONALINSULATION(F)ifrequiredby5.3.4a)(see2.10.1.3),BASIC

INSULATION(B),SUPPLEMENTARYINSULATION(S)andREINFORCEDINSULATION(R).IfthepeakworkingvoltagesexceedsthepeakvoltageoftheACmainsupplyvoltage,linearinterpolationispermittedbetweenthenearesttwopoints,thecalculatedminimumclearancebeingroundeduptothenexthigher0.1mmincrement.附表2L–次電路中的附加間隙（摘錄標(biāo)準(zhǔn)表2L）Unit:mmMainstransientvoltage1500V2500VPollutiondegree1and2Pollution3FunctionalbasicorsupplementaryinsulationReinforcedinsulationPollutiondegree1,2and3FunctionalbasicorsupplementaryinsulationReinforcedinsulationPeakworkingvoltageuptoandincluding,

VPeakworkingvoltageuptoandincludingV21021000420002982940.10.24930.10.23863790.20.45670.20.44744630.30.66400.30.65625470.40.87130.40.8Forvoltagesabovethepeakworkingvoltagevaluesgiveninthetable,linerextrapolationispermitted.附表2N–最小爬電距離（摘錄標(biāo)準(zhǔn)表2N）Unit:mmRMSworkingvoltageuptoandincluding,

VPollutiondegree12123MaterialgroupPrintedboardsOthermaterialsI,II,IIIa,IIIbI,II,IIIaI,II,IIIa,IIIbIIIIIIa,IIIbIIIIIIa,IIIb100.0250.040.080.40.40.411112.50.0250.040.090.420.420.421.051.051.05160.0250.040.10.450.450.451.11.11.1200.0250.040.110.480.480.481.21.21.2250.0250.040.1250.50.50.51.251.251.25320.0250.040.140.530.530.531.31.31.3400.0250.040.160.560.81.11.41.61.8500.0250.040.180.60.851.21.51.71.9630.040.0630.20.630.91.251.61.82800.0630.10.220.670.91.31.71.92.11000.10.160.250.7111.41.822.21250.160.250.280.751.051.51.92.12.41600.250.40.320.81.11.622.22.52000.40.630.4211.422.52.83.22500.5610.561.251.82.53.23.643200.751.60.751.62.23.244.5540012122.8455.66.35001.32.51.32.53.656.37.18Linearinterpolationispermittedbetweenthenearesttwopoints,thecalculatedspacingbeingroundedtothenexthigher0.1mmincrement.Forreinforcedinsulation,thecalculatedvalueforbasi

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