MajorComponents
RectierConvertsACinputvoltagetoDCvoltage.TherectierusesIGBT(Insulated
GateBipolarTransistor)powertransistorsandaPulseWidthModulated(PWM)
techniquetoprovideinputpowerfactorcorrectionandtominimizeanyharmonic
reectedontotheinputpowerlines.
InverterConvertsDCvoltagefromtherectierorfromthebatteriesintoACoutputvoltage
tomaintaintheattachedload.ThismoduleusestheIGBTtechnologytoprovide
digitalpowerquality.
StaticSwitchAutomaticallysuppliestheattachedloadfromthebypasssourcewhentheinverter
isoff.
BatterySystemStoresenergyforutilizationbytheinverterandattachedloadintheeventthatutility
ACpowerislostorisofunacceptablequality.

SingleLineDiagram

Duringnormaloperation,theutilitypower(Maininput)issuppliedtotheUPSrectier.Therectier
convertstheACpowertoDCthatissuppliedtotheinverter.TheinverterconvertstheDCvoltageto
three-phaseregulatedACvoltage,whichissuppliedtotheattachedload.
Duringpowerfailureconditions,theinverterissuppliedbythestoredener gyinthebatterysystem,and
theloadispoweredcontinuouslywithnointerruption.
TheMGEGalaxy4000UPSisdesignedforinternaloperationof208VACinputandoutput.External
batteries,andanoutputdistributionpanelmaybecontainedinauxiliarycabinetssimilarindesignto
theMGEGalaxy4000cabinet.Batteriesorexternalmaintenancebypasscircuitbreakersmayalsobe
containedinthirdpartycabinetsorwallmountedunits.
RefertoAppendix“SingleLineDiagram”.
StandardCabinets
TheMGEGalaxy4000individualcabinetdimensionsare:
•UPScabinet:72.1in(1831mm)Hx33.5in(851mm)Wx35.6in(904mm)D.
•Externalbatterycabinet:72.1in(1831mm)Hx26.5in(673mm)Wx33.5in(851mm)DOR–
•Externalbatterycabinet:72.1in(1831mm)Hx33.5in(851mm)Wx33.5in(851mm)D.
•Distributioncabinet:72.1in(1831mm)Hx19.5in(495mm)Wx33.5in(851mm)D.
TheUPScabinetisdesignedtoprovidefortopandbottomentryoftheutilitypowerfeed.Anoutput
voltageof208VACisstandardwiththeMGEGalaxy4000anddoesnotrequireanyadditional
cabinetry.ThecompletelistofadditionalcabinetsthatcouldbeincludedwithyourMGEGalaxy4000
systemare:externalmaintenancebypasswallcabinet,externalbatterycabinet,anddistributioncabinet.
Theexternalbatterycabinetsareprovidedintwodifferentcabinetsizesdependinguponthebatterytype
selected.Uptofourbatterycabinetsmaybeprovided.Thecabinetsmaybeinstalledadjacenttothe
UPSorremotelyandaredesignedfortopandbottomentry.Thedistributioncabinetprovidesa42pole
panelboard,withanoptionalsubmaincircuitbreaker.Thecabinetisdesignedfortopandbottomentry.
990–3964–001MGEGalaxy400040–75kV A208V5