Data Centre Reliability and Redundancy - Server Racks Australia

TIA 942 – Electrical systems (2)Redundancy N N N+1 2NTopologySingle or Parallel Single or Parallel ModulesModuleswith Static BypassAutomatic Bypass None Non dedicated maintenancebypass feeder to UPS outputswitchboardMaintenance BypassarrangementOutput Power DistributionBattery StringBattery TypeParallel Redundant modules,Distributed RedundantModules or Block RedundantSystemsDedicated maintenancebypass feeder to UPS outputswitchboardParallel Redundantmodules, DistributedRedundant Modules or BlockRedundant SystemsDedicated maintenancebypass feeder to UPS outputswitchboardBypass from same source Bypass from same source Bypass from same source Bypass from reserve UPSsystemPanelboard incorporating Panelboard incorporatingstandard thermal standard thermal magnetic tripmagnetic trip breakersbreakersCommon string formultiple modules5 year valve regulatedlead acidDedicated string for eachmodule10 year valve regulated leadacid or flood typePanelboard incorporatingcircuit breakers that arecoordinated under overloadand ground fault currentconditionDedicated string for eachmodule15 year valve regulated leadacid or flood typePanelboard incorporatingcircuit breakers that arecoordinated under allovercurrent conditionsDedicated string for eachmodule20 year lead acid flood typeBattery Minimum Backup5 minutes 7 minutes 10 minutes 15 minutesTimeBattery Monitoring System Optional Optional String level by UPS system Centralised automatedsystem to check each cellfor, voltage and impedanceor resistanceFlywheel Allowed Allowed Allowed AllowedPower Distribution UnitTransformer Optional K-rated or harmoniccancellingK-rated or harmoniccancelling, Front accessablefor maintenanceK-rated or harmoniccancelling low inrush, Frontaccessable for maintenanceAutomatic Static Transfer SwitchOvercurrent Device NA Fuse Circuit breaker Circuit breakerMaintenance Bypass NA Manual non Guided Manual Guided Manual GuidedOutput NA Single circuit breaker Dual circuit breaker Dual circuit breaker