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4.7 Grounding
GroundVFDtothepowersourcegroundandmotorgroundtoavoidelectricalshock.
Connectadedicatedgroundwirefrompowertransformerorpower distributionpaneltoVFD
groundterminalanddedicatedgroundwirefromVFDtothemotorforground faultprotection
properoperation.Ifmetalconstructionorcondui
tsareusedasgroundleakcurrentpath,the
VFDcanhaveinadequategr oundingandgroundfaultprotection.
Connectgroundwirefirstbeforeanyotherwiresandonlyconnectittothededicatedground
terminaloftheVFD.Donotusethecaseorthechassisassemblyscrewsforgrounding.
VFDGro
undingwireshouldbeasshortaspossible.
DonotinstallagroundrodatVFDpackageifitisnotaserviceentranceratedpanel,otherwise
theVFDcannotprovidepropergroundfaultprotectionoritcanintermittentlytriponGround
Fault.