GE Industrial Solutions Pulsar Plus Controller - Manual (Page 167)

Pulsar Plus Controller Family
Issue 7 December 2011 167
• Initiating another Plant Battery Test. That is, once the test has been initiated, the test may be stopped
by initiating another test either through the controller or by shorting pins 19 and 20 of the host
interface connector.
• An alarm condition occurring. Any alarm condition that occurs during this test will result in the test
being aborted regardless of whether the contact-closure exists between pins 19 and 20 of the host
interface connector.
• The test has continued for over 100 minutes.
• The plant voltage has dropped below 44V. 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 controller, which allows the user to temporarily raise the plant voltage to a
higher, predetermined level, thus, reducing 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 controller 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 5A
• The duration of boost mode charging has reached the configured duration time (1-80) hours
• The controller receives either a High-Voltage, Rectifier Fail alarm, or High-Battery Temperature alarms
• User sets the plant state to Float via the TI.
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 TI. 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 front panel. 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. If the measured load current exceeds the N 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.
This feature may be used by customers to determine if the load being served is greater than N rectifiers
worth, in an N+1 system. That is, the load requirements have changed such that the power system is no