Toshiba H3BG2L100C61T - Battery Recharging

20 1600XPi Series UPS Installation and Operation Manual – 60616-014
9.7 Battery Recharging
The illustration below shows a graphical representation of the UPS battery recharge process after a full discharge.
BATTERY
CHARGE
VOLTAGE
CURRENT VOLTAGE
CHARGING
CURRENT
I
CHARGE
V
MAX
V
MIN
DISCHARGE
SHUT-OFF
POINT
PERIOD 1
PERIOD 2
PERIOD 3
TIME
FULLY
CHARGED
0 0
The recharge process usually consists of three periods. During the rst 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 ow into
the batteries to keep them fully charged and oating 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.
RATED BATTERY VOLTAGES
Model Vmax Vmin Icharge
(Typical)
3.6 kVA 163 V 114 V 1.0 A
5.2–6 kVA 245.7 V 170 V 1.0 A
8 kVA 327 V 227 V 1.0 A
10 kVA 327 V 227 V 1.0 A
14 kVA 327 V 227 V 1.0 A
18 kVA 327 V 227 V 1.0 A
22 kVA 327 V 227 V 1.0 A