GE Industrial Solutions CPS6000 - Manual (Page 190)

CPS6000 –48V Indoor/Outdoor Power Shelf
Issue 21 January 2008
190
Appendix B: Battery Functions
Float Mode
Float mode is the default mode of operation of the battery plant. The plant voltage, while in
float mode, is determined by the configuration parameter Rectifier Float Set point (fsp) and
may be adjusted by the Battery Thermal Compensation circuit, if active. No individual
adjustment of plant rectifiers is necessary and load sharing among plant rectifiers is automatic
in all plant modes and will take effect within several seconds of a new rectifier being added to
the system.
The fsp should be set per the battery manufacturer's recommendations. Note that the actual
fsp measured on the plant may differ from the value set by the user if thermal compensation is
enabled. See Slope Thermal Compensation (next topic) for more details.
Slope Thermal Compensation
The following is a list of slope thermal compensation parameters that can be configured in the
controller.
High Temperature Alarm
Alarm threshold can be set from 30°C to 85°C. The alarm retires when the temperature drops
to 10°C below the set threshold. The factory default setting is 55°C.
High Temperature Compensation
The system controller automatically enables high temperature compensation if a VT thermal
probe is detected. The feature can be disabled by disconnecting all thermal probes and
updating the serial links using the Lamp Test function. Settings for this feature are as follows.
V Step Down: Battery step temperature can be set from 45°C to 85°C. The factory default
setting is 75°C.
High Comp Limit: The upper temperature thermal limit can be set from 30°C to 55°C. The
factory default setting is 45°C.
Decrease: The upper temperature slope setting (rate of decrease) can be set from -1mV to -
10mV in -2mV steps. The factory default is -3mV.
Nominal Temperature: Temperature above or below which Slope Thermal Compensation is
enabled. The stable range is 15 to 30°C. The factory default setting is 25°C.