Operation Principle And Hardware Description; Contents Of This Chapter; Operation Principle - ABB ACS880-7107LC DC Hardware Manual

Operation principle and hardware description 13

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Operation principle and hardware
description

Contents of this chapter

This chapter introduces the operation principle and construction of the DC feeder unit.

Operation principle

The DC feeder unit provides a connection point for an external energy storage to the common
DC bus of a drive system. It enables transferring energy from a common DC bus of a drive
into an external energy storage and discharging energy back to the DC bus. The energy
storage can be, for example, a battery or super capacitor. The energy storage media does
not belong to the DC feeder unit product offering.
One DC feeder unit can contain one single or up to 3 parallel connected strings.
Parallel strings must be connected to separate energy storages. Each parallel string must
also have its own connection cabling. For more information, contact ABB.
Typically, the DC feeder unit is used in marine applications for heave compensation, peak
load compensation, propulsion supply in harbors, or energy storing instead of an additional
generator. The DC feeder unit can also be used in several other applications where energy
storing and reuse is needed.