EnerSys Alpha Cordex CXC HP - Low Voltage Disconnect Operation

Cordex®CXCHPControllerSoftwareManual|5-DCpowersystems
Estimated State of Charge (SOC),andanEstimated Battery Runtime (RTR)remainingatalltimes.
Itisnotalwayspracticaltoestimatethesevalues.Forexample,ifthesystemgoesintoachargingstage
immediatelyafterarestart,thereisnowaytoestimatetheSOCorRTR.
Theaccuracyoftheestimatedbatteryhealthimprovesasthebatteryundergoesmoredischargecycles
anditalsoimproveswithdeeperdischarges.
IfabatterydischargeoccursthatgoesbelowanSOCvalueof80percent,thentheBattery Runtime
& Health Estimation functioncreatesaLast Battery Discharge Summary,aLast Battery Recharge
Summary andrecalculatestheEstimated Battery Health.Ifestimatedbatteryhealthislessthan80
percentthenthatbatteryisnormallyduetobereplaced.
5.2.6. Low voltage disconnect operation
WheneverthesystemparametersrequirestheLVDtobeactivated,a60secondcountdownandaudible
warningbegins.Whenthecountdownreacheszero,theLVDisactivated.
Duringthecountdown,acommandinthedisconnectmenucanbepressedtoinhibitLVDactivation.
WhenthedisconnectfirstchangestoPending,everyuserloggedintothesystemwillreceivenotification
thatthedisconnectisabouttoactivate,andtheoptiontoinhibitit.Toreleasetheinhibit,youmustactivate
thereleasecommandforeachLVD.
Therearethreetypesofdisconnects:“legacy”disconnect,generalpurposedisconnect,andbattery
disconnectwithlatchingcontactor.
Legacy disconnect
Thelegacydisconnectisthefirstdisconnectavailableonthecontroller.Itofferstheabilitytodisconnect
basedonvoltage,timeelapsedsinceACfail,andthestateofchargeofthebattery.
General purpose disconnect
Thegeneralpurposedisconnectisbestsuitedforuseasaloadsheddingdisconnect.Itcanbeconfigured
todisconnectbasedonvoltage,oruptothreecustomizabledisconnectconditions.Therearethree
customizablereconnectconditionsinadditiontotheusualvoltagereconnectthreshold.
Whenusingtheoptionaldisconnect,notethefollowingconditions:
• Thevoltagemustbelessthanthedisconnectthresholdor
• Oneormoreoptionaldisconnectconditionsaretrueand
• Alloptionalreconnectsmustbeunknownorfalse
• Iftheoptiontodisallowdisconnectduringbatterytestistrueandbatterytestisactive,the
disconnectwillnotactivateuntilbatterytestisnolongeractiveorthisoptionisdisabled.
Whenusingtheoptionalreconnect,notethefollowingconditions:
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