GE Industrial Solutions Pulsar Plus Controller - Manual (Page 166)

Pulsar Plus Controller Family
Issue 7 December 2011 166
Upper Temperature Slope (usp): The slope rate for the voltage decrease per cell when the battery
temperature is above the ntt (Battery Thermal Slope Nominal Temperature).
Upper Temperature Limit (utt): The upper temperature where Battery Thermal Compensation will have
reduced plant voltage to a level corresponding to (usp*(utt-ntt)*24)V below the fsp. Plant voltage will be
reduced proportionally at any temperature between this point and the Battery Thermal Slope Nominal
Temperature (ntt).
Battery Thermal Alarm Threshold (thr): A monitored battery temperature above this threshold results in a
Battery Thermal alarm with a PMN severity.
Battery Thermal Step Temperature (spt): A monitored battery temperature above this threshold results in
an additional 4.08V step decrease in plant voltage.
Plant Battery Test
The following is a list of plant battery test parameters that can be configured in the controller. The result of
the Plant Battery Test is available in the Batteries sub-menu of the Status menu.
Manual Test: Permits manually starting a battery discharge test. The test can be set to end on either of the
following two parameters.
Duration: The duration of the test can be set from 0.1 hours to 99.9 hours.
Cutoff Cell V: The test can be set to end when battery cell voltage reaches this cutoff voltage. Cutoff voltage
can be set from 1.5V to 2.0V.
Automatic Test: This utility offers the flexibility of running pre-programmed battery tests at specific times
and days, and for specific durations.
Automatic Test: Enable or disable automatic periodic running of the battery test. The factory default setting
is disabled.
Interval: The test interval (time between tests) can be set from 1 to 18 months in 1 month increments. The
factory default setting is 12 months.
Next Test: Enter a particular day in dd-mm-yy format to automatically run the battery test on that day.
Start Time: Enter a particular time in hh-mm format to automatically run the battery test at that time. The
setting can be configured from 0 to 23 hours. 00:00 is midnight.
Hours from BD: Time interval needed to elapse since the last Battery on Discharge alarm before a battery
test can be performed. This can be set from 0 to 240 hours in 1 hour increments. The factory default setting
is 72 hours.
Recharge Amp Limit: This section contains the settings for battery recharge current limit.
Limit: Enable or disable battery discharge current limiting.
Limit To: Current limit setting, from 5A to 1000A. The factory default setting is 50A.
During this test, the controller lowers the rectifier voltage to 44V. (This value was chosen to be higher than
1.2V plus the highest possible LVD contactor disconnect threshold so as not to accidentally open the LVD
contactor.) Lowering the rectifier output voltage to 44V creates a battery on discharge condition. If the
batteries are present and healthy, the plant voltage will remain above 48V and the batteries will support the
load. If the batteries are not present or are not able to support the load, the plant voltage will immediately
drop to approximately 44V without any consequence to the load. The Battery on Discharge alarm is masked
during this test.
The test is terminated by the occurrence of any of the following conditions: