MAKELSAN Challenger Series - Maintenance Mode; Battery Management; Normal Operation Mode

CHALLENGERSERIES10‐60KVA  PRODUCTDESCRIPTION
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AG–SD‐35Rev.No:1Rev.Date:25.09.2013PublicationNo:2 18
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2.2.5MaintenanceMode
Inmaintenancemode,theloadsareswitchedtothemaintenancebypass line with a
breaker,sothattheUPScanbeservicedwithoutcuttingoffthepowerflowtotheloads.
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2.3BatteryManagement
Lead–AcidBatteriesareusedwithUPSsasinternalwithvariableconfigurations.
2.3.1.NormalOperationMode
ConstantChargeCurrent
Currentislimitedto0.1Cuntillthefloatreachestochargevoltage.(adjustablebetween0.05C‐
0.25C.)Theappliedcurrentcannotexceedmaximumchargepower.
FloatCharge
Dependingonthebatterydischargecurrentthethirdpercentenergyofthebatteryischargedat
thislevel.Thankstothislevel,batteriesarekeptreadyforuseatthehighestcapacity.Forlead‐
acidbatteries,thisvoltagevariesbetweenvalues2.2‐2.35V/cellThisvoltagemaydifferslightly
withtemperatureadaptation.OptionofsettingthiscoefficientisprovidedwithourUPS.Ifthe
temperaturesensorisused,itisrecommendedtouse.
DeepDischargeProtection
Whilethesystemoperatesonbatterymode,ifbatteryvoltagehasdroppedbelowthedischarge
levelUPSshutsdownandstopsabsorbingenergyfromthebatteries.Thisvaluevariesbetween
1.6‐1.75V/cellforLead‐Acidbatteries,andforNi‐Cdbatteriesbetween0.9‐1.1V/cell.
LowBatteryWarning
While the system operates in battery (stored) mode, according to actual loads if the battery
capacitydropsbelowits40%value,itwillgiveaudibleandvisiblealarms.Thispercentagevalue
isadjustableforuserbetween20%‐70%.
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