GE Industrial Solutions Galaxy Vector Controller GCM3 - Manual (Page 68)

Galaxy Vector Controller GCM2, GCM3
4 - 14 Installation and Configuration Issue 4 January 2008
Very Low Voltage
Threshold
Very Low Voltage Major Alarm Threshold: In any system
mode, system voltage monitored below this threshold results in
a Very Low Voltage major alarm.
Battery Recharge
Current Limit
Settings
Battery Recharge Current Limit: The maximum current
flowing into a monitored battery string during a recharge period
is adjustable to any value between 10A and 1000A. At least one
battery string must be present to have this function.
Battery Recharge Current Limit Enable: To activate the
battery recharge current limit feature, the function must be
enabled in the appropriate configuration menu. The user must
select “enabled;” the default setting is “disabled.”
Battery Thermal
Compensation
Settings
Refer to Figure 3-1 (Standard) or Figure 3-2 (Flexent) for a
graphical representation of the various Battery Thermal
Compensation settings.
High Battery Temperature Alarm Threshold (G): A
monitored battery temperature above this threshold results in a
Battery Temperature major alarm. This threshold can be set from
30°C to 85°C. The default temperature is 45°C.
High Battery Temperature Step Down Temperature (H): A
monitored battery temperature above this threshold results in a
“step” decrease in plant voltage to a level corresponding to 0.17
volts per cell (VPC) below the Plant Float Voltage Set-Point
(FSP). This threshold can be set from 45°C to 85°C. The default
temperature is 65°C.
Battery Temperature Slope Upper Temperature (F): This is
the upper temperature where Battery Temperature
Compensation will have reduced system voltage to a level
corresponding to F*(F-D)*cells-per-string below the FSP.
System voltage will be reduced proportionally at any
temperature between this point and the No Voltage
Compensation Temperature (D).
Battery No Voltage Compensation Temperature (Nominal
Temperature) (D): This is the zero compensation temperature
point. Temperatures monitored between this point and the High
Battery Temperature Voltage Decrease Upper Threshold (F)
will result in a proportional decrease of plant voltage to a level
corresponding to F*(F-D)*cells-per-string below the limit. If the