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4.6 Power Wiring Recommendations
TheVFDprovidesthehigh‐voltageandhigh‐currentconnectionsforinputpowerandoutput
power.Theinputpowerisfused(3phases)andfilteredforEMCcompliance.
DonotconnectinputpowertoVFDMotorTerminalsU/T1,V/T2,andW/T3otherwiseVFDcan
bedamaged.
Donotrunin
putpowerandmotorwiresinthesameconduit,otherwisetheVFDcan
malfunctionorbedamaged.(SeeFigure4.3.1)
DonotruninputpowerwiresormotorleadsformultipleVFDsincommonconduit.(SeeFigure
4.3.1)
Donotinstallpowerfactorcorrectioncapacitors,surgesuppressors,orRFIfilter
sontheVFD
output.ThesedevicescantriggersomeVFD faultsorevendamagetheVFD.
Donotleavewirefragments,metalshavingsorothermetalobjectsinsidetheVFD,otherwise
VFDcanbedamaged.
Sizepowerwiretomaintainavoltagedroplessthan2%atVFDormotorter
minals.
Installaload(output)reactortoprotectmotorwindingsifdistancefrom460Vor600VVFDtoa
motorisintherange45‐100feetoroutputdV/dtfilterforarange100‐1000feet(800feetfor
submersiblepumps)orasi
newavefilterforgreaterdistances.