TOSHIBA
19
5.0
Operating the UPS
5.6
Battery Recharging
The graph below shows the typical voltage requirements for recharging the UPS unit’s
batteries.
The recharge process usually consists of three periods. During the first period, the
current is maintained at approximately 0.4 amperes. In the second period, the constant
voltage control starts and the current gradually decreases as the batteries continue to
charge. In the third period, a slight current gradually decreases as the batteries continue
to charge. In the third period, slight current flows into the batteries to keep them fully
charged. After a complete discharge, a full recharge asually requires 24 hours (90%
recharge in 8 hours).
The chart depicted below shows the rated maximum and minimum battery voltages, and
the charge current.
Rated battery voltages
Model
Vmax.
Vmin.
Charge
2000 VA
82.8Vdc
57.6Vdc
0.4 (A)
