GE Industrial Solutions CPS6000-M2 - Manual (Page 120)

CPS6000-M2 Installation Guide H5694720
Issue 8 January 2008 120
Appendix A: 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 and may be adjusted
by the Battery Thermal Compensation circuit, if active. No individual adjustment of plant
rectifiers is necessary. 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 Float Set point should be set per the battery manufacturer's recommendations. Note that the
actual Float Set point 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.
Battery 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 has the ability to disable or enable the high temperature compensation
feature independent of detection of a thermal probe. The feature is defaulted to be enabled
however it can be disabled by going to the appropriate configuration menu. 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.