Eaton SC100 - Data Logging

System Operation
Copyright © 2008-2011 Eaton Corporation. All Rights Reserved.
IPN 997-00012-63C August 2011
37
Batteries Configuration
The following battery parameters must be configured.
Parameter
Description
Where to find:
Cells Per String
The number of 2V cells per battery string (for example:
24 in a 48V nominal system).
DCTools: Batteries
Battery Capacity
Set to the rated 10 hour capacity of the installed battery
strings.
Battery State
Threshold
Used to determine the Battery Charge State. See Battery
Charge State on page 36.
DCTools: Alarms > Alarm
Configuration
Battery Time Remaining
The SC100 obtains characterization data from periodic battery discharges, to a specified end
voltage.
During a battery discharge, the SC100 uses this characterization data to calculate an estimated
time until the battery will reach the specified end voltage.
 If a battery disconnect LVD is fitted then the end voltage will usually be the voltage at which the
LVD disconnects the battery.
 Battery Time Remaining is designed for a constant power load. The accuracy of the time
remaining calculation will be reduced if the dc power system is connected to a predominantly
resistive (constant current) load.
 The time remaining calculation will not be correct if a non-essential load is disconnected during
the battery discharge.
The following information is available about Battery Time Remaining.
Parameter
Description
Where to find:
Battery Time
Remaining*
During a battery discharge, this is the estimated time
until the battery voltage will be equal to the End
Voltage, at the present battery current. Time Remaining
will be re-calculated if the load current varies during
discharge (for example, when a load disconnect LVD
operates).
SC100: Menu > Controls >
Batt Time Remaining
DCTools: Batteries
Estimated State of
Charge (SOC)*
The estimated charge left in the battery (Ah).
 *Values of Battery Time Remaining and SOC are only available during a discharge and if the
battery has been characterized. The values will be N/A when the Battery Charge State is
Floating or Charge, or if the battery has not been characterized. See Battery Characterization
on page 37.
Battery Characterization
Battery Characterization is a controlled battery discharge that provides data for the SC100 to
estimate the Battery Time Remaining during any subsequent battery discharge. The data is
displayed in the Battery Characterization Table.