Lucent Technologies 415B Battery Plant for 4ESS
7 - 54 Retrofit of 415A Battery Plant
Issue 6 September 1999
After configuration has been checked and values confirmed as
indicated above, proceed to the next section.
Galaxy Readouts
1. Using the digital multimeter, read the voltage across the
output buses [Charge (+), Charge Return (-)] at the top of
the Control and Distribution Bay. Compare this voltage
with the Galaxy Controller voltage on the front panel
readout. If the readouts do not agree to within ± 0.1 volt,
adjust the Galaxy to agree, utilizing the ADJ PLV function
under the CONFIGURE and PLANT menus. Return the
display to normal by pressing the MENU button.
2. Connect the digital multimeter across the plant shunt at the
top of the Control and Distribution Bay. Place a
240-260 ampere load on the plant. Remember that each
millivolt read across the shunt equates to 12 amperes load
(±2%).
3. Compare the shunt load reading with the Galaxy front
panel load reading. If they do not agree to within ± 1
ampere, adjust Galaxy to agree with the shunt readings,
utilizing the ADJ PLI function under the CONFIGURE
and PLANT menus. Restore the plant to normal via the
MENU key.
4. Remove load.
DC/DC
Converters
Mounted below the Galaxy are two (redundant) converters that
supply its power. They convert the 140Vdc battery voltage to
48Vdc. The converters are located behind the front panel.
1. Remove converter #1 circuit pack and observe that Galaxy
does not lose power. Also observe that CONV 1 FAIL
LED (red) lights and extinguishes as circuit pack is
removed. Check that a minor alarm is received at Galaxy.
Replace the converter #1 circuit pack.
2. Repeat Step 1 for converter #2.
Note
The “Boost” voltage level is equal to 2.23 volts per cell, or
156 volts.
