
-2-
Forthree-phaseequipmentconnectiontoanITpowersystem,a
four-poledevicewhichdisconnectall phaseconductorsand the
neutralconductorshouldbeprovided inthebuildingwiring
installation.
Thisispermanentlyconnectedequipment,itmustbeinstalled by
qualified maintenancepersonnel.
Earthconnectionessentialbeforeconnectingtothe buildingwiring
terminal.
1.2Operation
Donotdisconnectthe earthconductorcableon the UPS orthe
buildingwiringterminalsinanytimesincethiswouldcancelthe
protectiveearthingofthe UPS systemand ofall connected loads.
The UPS outputterminalblock maybeelectricallylived even if the
UPS systemisnot connected tothe buildingwiringterminal.
Inordertofullydisconnectthe UPS,firstpressthe OFF button,
then disconnect the mainslead.
Ensurethat no liquidorotherforeignobjectscan enterthe UPS.
The UPS canbeoperated byanyindividualswithno previous
experience.
1.3Maintenance, servicingandfaults
The UPS operateswithhazardousvoltages.Repairsmaybe
carried out onlybyqualified maintenancepersonnel.
Caution -risk of electricshock.Even aftertheunitisdisconnected
fromthe mainspowersupply(buildingwiringterminal),
componentsinsidetheUPS arestill connectedtothebattery
whicharepotentiallydangerous.