GE Industrial Solutions Galaxy Vector Rack Mounted Controller J85501M-1 - Manual (Page 41)

Galaxy Rack-Mounted Vector Controller J85501M-1
Issue 2 January 2008 Operation 3 - 13
200 < [(100 Ч 3) Ч 80)] / 100
200 < (300 × 80) / 100
200 < 240
Float mode adjustments are also available for High Float
Voltage Float Threshold which activates the High Float Voltage
(alarm only) minor when exceeded and the High Voltage Float
threshold which activates the High Voltage major alarm and
rectifier shutdown. Battery on Discharge Float Threshold and
Very Low Voltage Threshold are additional Float mode
configuration parameters. Refer to the Alarm Descriptions
section for additional information regarding these alarms.
Battery Recharge
Current limit
The battery recharge current limit feature enables the Vector
Controller to limit the recharge current flowing into a battery
section during the charge cycle. This feature is available only in
plants that have at least one battery shunt to monitor the battery
current. It can be enabled or disabled using the front panel
display or EasyView
®
Interface. The recharge current flowing
into the battery section can be limited to any value between 10
and 1000A.
The Vector Controller can monitor up to two shunts connected
to two battery sections, each battery section can contain one or
more battery strings. The controller limits the current flowing
through the shunts thereby limiting the charging current into the
batteries. This feature has no impact on the discharge current
flowing from the battery. The controller maintains the recharge
current within 10% of the set level.
Battery Discharge
Test
The purpose of the test is to verify the battery capacity connected
to the plant. The reserve time can be predicted after the test and
stored in the memory for future retrieval. By discharging about
20% of the battery capacity, the controller can predict the total
reserve time if 100% battery capacity is discharged at the same
load condition.
This function can be enabled in the configuration process by
enabling the battery test in the appropriate configuration menu.
Refer to Section 4 for detail. If the function is enabled, this test
can be activated by accessing the operations menus and
manually pressing the Battery Test Start softkey. The battery test
can be stopped in the same manner, by pressing the Battery Test
Start softkey again during the test.