10. Distribution systems
Thissectionprovidesanoverviewoftheoperationandconfigurationofadistributionsystemandits
subsystems,panels,andbreakers.
10.1. Introduction to distribution systems
AdistributionsystemisawaytodefineandtrackhowtheoutputpowerofaDCsystemisdistributed.The
systemmaybecomposedofspecializedADIOmodulesbuiltforthepurposeofdistributionorviageneral-
purposeADIOmodulesinanyconfiguration.Thedistributionsystemitselfisreallyjusta“container”to
holddistributionsubsystems.
InthecaseofthespecializedADIOmodules(asmartsubsystem),thesubsystemwillmapone-to-one
withtheADIOmodule.Forexample,aCordex®SmartBDFBiADIOmodulewillberepresentedinthe
distributionsystemasonesubsystem.Manuallycreatedsubsystemscanbemappedtoanumberof
ADIOmodules,andcontainauser-definednumberofbreaker/fusepanelsandbreakersthemselves.
Withinasubsystemthereareanumberofpanels.Apanelisagroupingofbreakers/fuses.
Apanelisconsidereda‘downstreamload’ofasubsystemandabreaker/fuseisconsidereda
‘downstreamload’ofapanel.Abreakercanthenfeedareferencedload.Forexample,abreaker
mayfeedaDCsystemoranothersubsystem.Inthisway,ausercancreateprimaryandsecondary
distributionlayouts.Understandingthisrelationshiphelpstovisualizehowadistributionsystem,its
subsystems,panels,breakersorfuses,andreferencedloadsareorganized.
Amanuallydefinedsubsystemmaycontainupto160breakersacrossallpanels.Thiscouldconsistof
160panelswithonebreakereach,10panelswith16breakerseach,oranothercombination.Thesmart
subsystemswillcontainthenumberofpanelsandbreakerssupportedbytheADIOmoduletypetowhich
theycorrespond.
Figure 10-1 ExampleofaDCsystemdistributionsystem
DC System
Distribution System
Battery
BDFBCXPS-C
Reference Load
Subsystem 1 Subsystem 2
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