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Cordex®CXCHPControllerSoftwareManual|5-DCpowersystems

5.3.5.1. Rectifier configuration guidelines

Thefollowingareguidelinesforsettingrectifierconfiguration.Someorallmayapply.

Over Voltage Protection

Threshold

Setthisvalueasfaraboveequalizevoltageorboostvoltageasneeded.Fora48V

system,theusualvalueis60V.Theactualupperlimitofthissettingdependsonthe

rectifiermodel.IftheRectifierConfigurationErroralarmisactive,itusuallymeansthe

OVPthresholdistoohighortooclosetotheequalize,boostorfloatvoltagesetting.It

isnecessarytohaveatleast1V(for48Vsystem)differencebetweenfloat,equalize

andOVPsettings.

System Start Delay SetthisvaluetodelaythestartupofallrectifierswhenACreturnstogiveotherAC

equipmentonsiteachancetostartupfirst.

Module Start Delay Setthisvaluetoapplyastaggeredstartdelaytoindividualrectifiers.Thishelpslim

itACinrushcurrentandgivesthecontrollertimetoengagechargecurrentcontrol,if

enabled,topreventabatterybreakerorfusefromopening.Eachrectifierisassigned

amodulestartdelaythatisamultipleoftheconfigurationvalue.Ifthevalueexceeds

250s,thevaluestartsagainatthelowestmultiple.Forexample,ifthemodulestartde

layis60sandthereareeightrectifiersinthesystem,thestartdelaysassignedtothe

rectifierswillbe:1s,60s,120s,180s,240s,1s,60s,120s.Thismeansthatthreerecti

fierswillbeassignedthesame1s,60s,and120sdelays.

Current Limit/Power Limit Setoneofthesevalues(notboth)tolimittheoutputcurrentoftherectifier.Thisisnor

mallyonlydoneifthesitehasundersizedACbreakersorisrunningonanundersized

ACgenerator.Thesevaluesmustonlybesetwhileinfloatmode.Settingthemwhen

thebatteryisbulkchargingmayresultintoomuchcurrenttothebattery.

Fast Soft Start Setthistoenabledifthesystemhasnobatteriesandtheloaddoesnotturnonwhen

ACreturns.

CL/PL alert Thisisusuallydisabledwhenthesystemhasbatteriestoavoidacurrentlimitorpow

erlimitalarmduringbatterycharging.

Ramp Test Thisisnormallyenabledtodetectifarectifierhasbeendisconnectedfromtheload.

Whenenabledandiftherectifierissourcinglessthan2.5percentofit’smaximum

current,therectifierwillbrieflyraiseit’soutputvoltageby0.5V(fora48Vsystem)

onceperminute.Iftherectifiercannotsourceatleast2.5percentofit’smaximumcur

rent,theramptestwillfailandaRectifierFailalarmwillactivate.

5.3.6. Configure the shunts

Bydefaultthesystemhasoneshunt.Youmayaddorremoveshuntsasneeded.

ToconfigureashuntyouneedanADIOmodulewithcurrentinputs.Theshuntwillmapthecurrentinputs

fromtheADIOmoduletotheLoad Current Source fieldoftheLoadConfigurationtableortheBattery

Current Source fieldoftheBattery Configuration table.

To configure a shunt:

0350058-J0 Rev AL Page 83

EnerSys Alpha Cordex CXC HP User Manual

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