Lucent Technologies Lineage
®
2000 400A, 60Hz Ferroresonant Rectifier J85503C-3
Issue 10 July 2000
Testing 6 - 23
As a Group
If the load requirement is always greater than the capacity of the
smallest rectifier, adjust the rectifiers to float voltage using the
following procedure. Rectifiers must be on line with plant cables
connected and REG fuses installed in the plant controller or remote bay.
1. Measure the battery voltage with a test meter connected to the
Plant test jacks.
2. If the battery voltage is not at the predetermined float voltage or
the desired battery float voltage, perform the following:
a. If the voltage is too high, turn the Float Adj potentiometer
counterclockwise on the rectifier with the highest output
current.
b. If the voltage is too low, turn the Float Adj potentiometer
clockwise on the rectifier with the lowest output current.
c. Check the battery voltage and re-adjust steps the Float Adj
potentiometer until the battery voltage is within the required
tolerance of the desired float voltage.
3. If all rectifiers are not carrying some load current (between 5
percent and 95 percent of rated load):
Note: Rectifiers are not required to share load current equally
unless load share is enabled.
a. Turn off all spare rectifiers, but leave enough rectifiers on to
handle the load current.
b. Turn up (clockwise) the Float Adj potentiometer on rectifiers
carrying less than 5 percent rated load till they carry more than
5 percent rated load, and
c. Turn down (counterclockwise) the Float Adj potentiometer on
rectifiers carrying more than 95 percent rated load until they
carry less than 95 percent rated load.
d. Repeat from Step 2 (battery voltage check and adjustment) until
all rectifiers are carrying between 5 and 95 percent rated load
and the battery voltage is within the required tolerance of the
desired float voltage.
e. Turn on one of the spare rectifiers, and turn off one of the
previously loaded rectifiers (same number of rectifiers on).
Perform the same adjustments as before.
f.
Repeat for each rectifier that has not been adjusted.
g. Upon completion, turn all rectifiers on.