APC BK600EI, BK400EI, BK250EI Option Switch #2 Switch #3 Undervoltage Transfer, Option Switch #4

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Option

Switch #2

Option

Switch #3

Undervoltage

Transfer

Down (OFF)

Down (OFF)

196 Vac

Up (ON)

Down (OFF)

184 Vac

Down (OFF)

Up (ON)

172 Vac

Up (ON)

Up (ON)

160 Vac

5.4.3 Option Switch #4

Option switch #4 sets the internal operating frequency of the inverter. It should be set to match the local line frequency. When in the down (off) position, the UPS will operate properly with a 50 Hz line. If your local line frequency is 60 Hz, set the option switch #4 in the up (On) position.

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Contents APC Back-UPS Pleasesavethismanual ImportantSafetyInstructionsPleasesaveorrecyclethepackagingmaterials TableofContents 0Introduction 2Userreplaceablebattery3Optionswitches 1Overview5SurgesuppressionandEMI/RFIfiltering Test / Alarm Disable switch6Remoteinterface 0Safety 0Sécurité!Françias 0Sicherheit!Deutsch Vorsicht¡Seguridad!Español ¡Atencion1Receivinginspection 0Installation2Placement 3Loadtypes4ConnectingtotheUtility 5BatterychargingConnecting Your Equipment to the UPS Example labels found at system equipment rear panels Test for Proper Operation 8Overloads0PrinciplesofOperation Noise and surge suppression 4Battery 2Loadtransferswitch3BatteryCharger 5InverterMonitoring and control electronics 6Transformer8Operationduringautilityfailure Page Test/Alarm Disable switch on units so equipped ControlsandindicatorsPower I/0 switch 3AudiblealarmOption Switch #1 4OptionSwitchesOption Switch #2 and #3 Option Switch #2 Switch #3 Undervoltage Transfer Option Switch #42PowerChuteSoftware600VAonly 0UPSmonitoringPage 0Difficulty 0Difficulté Françias0SchwierigkeitDeutsch 0Dificultad Español ¡Cuidado1TroubleshootingChart Mo r1TroubleshootingChart 2ReplacingtheBattery 3ObtainingService StorageConditions StoringtheUPS2ExtendedStorage 0RunTimeVersusLoad 10.3OutputCharacteristics Specifications10.2TransferCharacteristics 10.4Batteryandcharger10.6Operatingenvironmentandphysicaldimensions Surge and noise suppressionDeclaration of Conformity LimitedWarranty Page Serial number