GE Industrial Solutions Galaxy Vector Controller GCM3 - Manual (Page 50)

Galaxy Vector Controller GCM2, GCM3
3 - 16 Operation Issue 4 January 2008
can be stopped in the same manner, by pressing the Battery Test
Start softkey again during the test.
Note: The battery type should be configured before starting. The
Vector assumes one type of battery per system. The battery type
may be configured as either valve regulated or flooded.
During the test, rectifiers are set at a lower voltage. The set
voltage is the maximum of {LVD1 threshold +
ΔV, the LVD2
threshold + ΔV, or EDV}, where EDV (the end voltage) = 22V
for 24V plant and 44V for 48V plant, ΔV = 0.6V for 24V plant
and 1.2V for 48 plant. The plant mode is returned to float mode
automatically if this set voltage is reached during the test.
The test stops automatically whether it is successful or not. Refer
to the configuration process in Section 4. During the test, the
default screen of the LED indicates a battery test is active. Any
alarm occurring during the test aborts the test, and causes the
system to return to float mode.
The last test results, battery reserve time, and load current are
stored in memory. The user can retrieve them under the
operations menu. Refer to the configuration process in Section 4.
Boost Mode Controls and Thresholds
Boost mode is a feature of the Vector which allows the user to
temporarily raise the system voltage to a higher, predetermined
level for a specified period of time. This feature may be useful in
systems using a flooded battery type where the batteries are
displaying symptoms of an undercharged state such as differing
cell voltages or in the case of the Lineage Power KS20472
Round Cell, lead-sulfate crystals visible on the vertical positive
plate columns. Boost mode may also be used to accelerate the
recharge of discharged strings to their full charge condition.
Plant voltage, while in Boost mode, is determined by the
configuration parameter Plant Boost Set- Point. Refer to “Plant
Boost Mode Settings” in Section 4. Like Float mode, there is no
individual adjustment of plant rectifiers. Load share among plant
rectifiers is automatic.
Boost voltage is determined from the battery manufacturer’s
recommendations, but must also be less than the maximum
voltage rating of all connected loads since Boost Mode raises the
entire system bus voltage. Typical boost levels and durations
used might include 2.25 VPC for 96 hours, 2.27 VPC (volts per