Battery Recharging - Toshiba 1600XPi Series Installation And Operation Manual

9.7

Battery Recharging

The illustration below shows a graphical representation of the UPS battery recharge process after a full discharge.
I
CHARGE
The recharge process usually consists of three periods. During the first period, the current is maintained at approximately 1
ampere. This current limit is the maximum value that can be used to charge the batteries (for minimal recharge time) while
assuring safety and long battery life. In the second period, constant-voltage control starts and current gradually decreases
as the batteries charge to their normal fully charged state. In the third period, a slight trickle current continues to flow into
the batteries to keep them fully charged and floating at the normal Vdc level. A full recharge usually requires 24 hours (90%
recharge in 12 hours) after a complete discharge.
The following chart shows the rated maximum and minimum battery voltages and the charge current for each of the sizes.
20
CURRENT VOLTAGE
V
MAX
V
MIN
DISCHARGE
SHUT-OFF
POINT
0 0
PERIOD 1
RATED BATTERY VOLTAGES
Model
3.6 kVA
5.2–6 kVA
8 kVA
10 kVA
14 kVA
18 kVA
22 kVA
CHARGING
CURRENT
PERIOD 2
Vmax Vmin
163 V 114 V
245.7 V 170 V
327 V 227 V
327 V 227 V
327 V 227 V
327 V 227 V
327 V 227 V
1600XPi Series UPS Installation and Operation Manual – 60616-014
BATTERY
CHARGE
VOLTAGE
FULLY
CHARGED
TIME
PERIOD 3
Icharge
(Typical)
1.0 A
1.0 A
1.0 A
1.0 A
1.0 A
1.0 A
1.0 A