GE Industrial Solutions Galaxy Power Systems - Manual (Page 208)

Installation Guide for Galaxy Power Systems
15 - 24 Power Up and Installation Completion Issue 12 August 2012
Testing the BD Alarm and High Voltage Shutdown
For additional information about the High Voltage Shutdown feature
and test, consult the Galaxy Controller product manual.
Testing the BD Alarm and High Voltage Shutdown
Step Action
1 Set the system load to 25 amperes.
2 Turn all rectifiers to STBY.
3 As the system voltage drops, observe that the BD alarm
activates at the programmed BD threshold.
4 Turn ON a single rectifier after the BD activates. Observe
that the BD retires as the system voltage rises above the BD
threshold.
5 Increase the system voltage to the HV level. (The HV
factory default is 27.5V or 55.0V.) Verify that the rectifier
shuts down, with an "HO" display.
6 Immediately after the rectifiers shut down, return the system
to the float voltage. Verify that the rectifiers restart.
Note: HVSD is a controller microprocessor function, so as
long as all rectifiers have established communication with
the controller, there is little benefit to repeating the HVSD
test with the remaining rectifiers in the plant. If it is
performed on additional rectifiers, it must be completed one
at a time in order to get past the uneven load sharing
requirement for the shutdown and it will be necessary to
occasionally perform a software restart from the controller in
order to reset its HVSD timer.