Lucent Technologies Lineage
®
2000 200A Ferroresonant Rectifier J85503B-2
6 - 22 Testing
Issue 8 January 1999
Adjust
Rectifiers to
Float Voltage
Float voltage is the optimum voltage level at which a battery
string gives maximum life and full capacity. This voltage
depends on the type and number of batteries in a plant.
Float voltage per cell x number of cells = battery string float voltage
The float voltage for flooded lead-acid batteries such as the
Round Cell is 2.17 volts per cell. For a 24-cell configuration of
Round Cells, string voltage is
2.17 x 24 = 52.08 volts
To adjust rectifiers to the predetermined float voltage, the
rectifiers must be on line with plant cables connected and REG
fuses installed in the plant controller or a remote bay.
Adjust Rectifiers
Individually
The fastest way to adjust a group of rectifiers to float voltage is
to adjust them individually, turning each one off after
adjustment, and turning them all on after the last adjustment. In
order to use this method, however, the load requirement at the
time of the adjustments must be less than the capacity of the
smallest rectifier.
1. Measure the battery voltage by holding the meter selector
switch in the Plt V position.
2. If the battery voltage is not 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.
b. If the voltage is too low, turn the Float Adj
potentiometer clockwise.
c. Check the battery voltage and repeat Steps (a) and (b)
above until the battery voltage is within the required
tolerance of the desired float voltage.
3. Turn the rectifier off and repeat this procedure for each
rectifier in the group.
4. Turn all rectifiers on after the last rectifier is adjusted.
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Страница 72: ...Lucent Technologies Lineage 2000 200A Ferroresonant Rectifier J85503B 2 5 22 Installation Issue 8 January 1999 ...