Battery Recharging - Toshiba Black Gold TB Series Operation Manual

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.
Model
2000 VA
TOSHIBA
Rated battery voltages
Vmax. Vmin.
82.8Vdc 57.6Vdc
19
Charge
0.4 (A)