GE Industrial Solutions Galaxy Pulsar Edge - Manual (Page 176)

Galaxy Pulsar Edge Power System Controller
Issue 3 October 2011
176
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The test has continued for over 100 minutes.
• The plant voltage has dropped below 44V or the LVD safe voltage. In this case, the system
will abort the test and resume rectifier operation.
After the test has stopped, the plant will revert to the float mode. It may go to boost mode if the
auto-boost feature has been enabled.
Boost Mode
Boost charging is a feature of the Pulsar Edge controller, which allows the user to temporarily
raise the plant voltage to a higher predetermined level to reduce the time needed to charge
batteries. The system may manually be placed in the boost-mode through the front panel.
Note that the measured boost voltage may not exactly match the value chosen by the user if the
thermal compensation feature is enabled. This is because the Pulsar Edge performs thermal
compensated boost charging and will adjust the boost value based on the battery temperature per
the slope chosen by the user.
The plant will exit the boost mode and enter the float mode if any of the following occurs:
• The current flowing into the battery string(s) is less than the configured current
threshold for at least 3 minutes.
• The duration of boost mode charging has reached the configured number of hours
• The controller receives either a Vsense Fail, Communication Fail, High-Voltage,
Rectifier Fail alarm, Major Fuse Alarm, or High-Battery Temperature alarms
• User sets the plant state to Float via the Craft port or remote interface.
Once initiated, the boost mode may be exited by placing the Plant State to Float.
Auto-Boost Charge
This feature may be enabled from the Craft port or remote interface. See Appendix B for details.
When enabled, the plant enters the boost-charging mode of operation following a battery
discharge once the BD alarm has been retired, provided the duration of the discharge was greater
than 4 minutes. The controller will not enter the auto-boost-charging mode if the discharge
duration was less than 4 minutes. When in auto-boost mode, the controller raises the plant voltage
to the value selected by the user. The controller keeps the plant in this mode of operation for a
minimum of 5 minutes. The exit conditions for the Auto-Boost Charge are the same as those for
Boost Charge.
Redundancy Loss Function
This feature must be enabled from the Craft port or remote interface. The controller determines
the number of rectifiers present and compares the actual currents being drawn by the load to that
produced by the total number of rectifiers less one or the configured value for the desired
redundancy. If the measured load current exceeds the N (or adjusted) rectifier’s capacity for over
1 min, the alarm condition is activated. The alarm condition is latched on until the Clear Events
command is activated from the front panel.