EnerSys Alpha Cordex CXC HP - Configure the Temperature Compensation System Function

Cordex®CXCHPControllerSoftwareManual|5-DCpowersystems
maybesuspendedforvariousreasons.IfthisisthecasetheCharge Current Control State willsay
Suspended andthesuspendreasonwillbeshowninCharge Current Control Suspended Reason.
Youcanenable/disableanincreasedvoltageintheabsorptionchargingstate.IfyoudisableElevated
Absorption Charging orthearmingthresholdwasnotreached,thentheabsorptionchargingstagewill
bedoneatthefloatvoltage.YoucanconfigureElevated Absorption Charging toterminateonatimeout
andalowcurrentthreshold.
Absorptioncharging,atanincreasedvoltage,isnormallydonefordeepdischargesonlysothereis
anAbsorption Arming Threshold.AbatterydischargemustreachavoltagebelowtheAbsorption
Arming Threshold forElevated Absorption Charging tobeactivatedontherecharge.
To configure the charging system:
1. GotoSystems > DC System > System Functions > Charging.Notethatyoumusthave
abatterydefinedintheDCSysteminordertohavethismenuitemavailableunderSystem
Functions.
2. InthePrimary Charge Current Control table,ensuretheCharge Current Control settingis
Enabled (thisisthedefault).
3.
SettheCharge Current (C/X) limittoanappropriatevalue(forexample,10-hrs).Seeyourbattery
manufacturers’datasheetforchargingrecommendations.
Notice: The charge current limit in amps cannot be set to an arbitrarily low value. The
charge current control feature uses the rectifier’s ability to limit its output current. All
rectifiers have a lower limit to which their current can be adjusted and this value is
documented in the rectifier hardware manual. For example, if you have two Cordex® HP
48-1.2kW rectifiers, they have a minimum current limit of 23 percent of maximum current.
This means the lowest amount of current they can output is 2 × 25A × 0.23 = 11.5 A. If
the load is 5 A, the lowest charge current limit to the battery will be 11.5A – 5A = 6.5 A. A
charge current limit of less than 6.5 A cannot be achieved with this arrangement.
4. FromtheAbsorption Charging Configuration table,enableElevated Absorption Charging.
5. SettheElevated Absorption Arming Threshold toavoltagethatindicatesadeepenough
dischargetowarrantabsorptionchargingatahighervoltage.
6. SettheElevated Absorption Voltage toavaluerecommendedbythebatterymanufacturer.
7. SettheElevated Absorption Termination Threshold inamps.
8. SettheElevated Absorption Timeout inhours.
9. SettheTerminate/Disallow Elevated Absorption When True settingtoeitherpreventor
terminateelevatedabsorptionbasedonacustomdatacondition(ifdesired).
5.3.15. Configure the temperature compensation system function
Temperaturecompensationusesthebatterytemperaturetoadjustbatteryvoltage.Thedefaultvaluefor
temperaturecompensationis–2.5mV/℃/Cell(–1.5mV/℉/Cell).
0350058-J0 Rev AL Page 93