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APC MGE Galaxy 3500 Technical Information Page 11

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Operation
WARNING:Forsafetyreasons,onlyqualiedpersonnelisallowedtoperformthe
operationproceduresdescribedinthischapter.
Modes
TheUPShasdifferentoperationmodes.IftheinstallationincludesaMaintenanceBypassPanel(MBP),
anexternalmaintenancebypassoperationmodewillalsobeavailable.
NormalOperation
TheUPSconvertsutility/mainspowertoconditionedpowerfortheconnectedload.
BatteryOperation
TheUPSprovidespowertotheconnectedloadfromitsinternaland(ifavailable)externalbatteriesfor
aniteperiod.TheUPStransferstobatteryoperationifthesupplyofutility/mainspowerfails,oris
outsidethepre-denedlimits.
InternalBypassOperation
Internalbypasskeepstheloadsuppliedwithutility/mainspowerduringmaintenanceoftheUPSpower
sections.Ininternalbypassoperation,utility/mainspowerissentdirectlytotheconnectedloadbypassing
allinternalUPSfunctionsandlters.Batteryback-upisnotavailableininternalbypassoperationeven
thoughthebatteriesareinplace.
ExternalMaintenanceBypassOperation
TheUPScanbeconnectedtoanoptionalexternalMBP .Whenactivated,thispanelbypassestheentire
UPSenclosure,feedingutility/mainspowerdirectlytotheload.AnactivatedexternalMBPcompletely
isolatestheUPSandallowsmaintenancetobeperformed.AnexternalMBPismandatoryiftheUPS
isrunninginparallel.
OptionalParallelOperation
TheconnectedloadispoweredbymultipleUPSunitstoincreasesystemredundancyortoincreasepower.
Theinternalmechanicalbypassleverisnotavailable.
990–2386D-001
MGE™Galaxy™3500Series10-40kV A380/400/415V10-30kV A208/220V
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