UPS 30-300kVA User Manual
Maintenance
69
The battery number setting range is 140-180.The lowest EOD voltage for the LFPB will be
360V and highest voltage can be 620V.
5.4.3
Battery Capacity Setting
Battery Capacity Setting sets the capacity value of the battery block .For example,
if the system uses 40 blocks of 12V/100AH batteries, the Battery Capacity Setting
should set to 100 Ah. If 240 cells of 2V/1000AH are used, the Battery Capacity
Setting should be set to 1000 Ah.
In case of there are more than one strings of battery in parallel, the battery
capacity setting value will be the times of the single string. For instance, if the
configuration is two strings of 40 blocks of 12V/100AH batteries, the battery capacity
setting should be set to 200AH.
The system sets current limits according to the battery capacity set. For the
Lead-Acid battery, the current limit is 0.2C, and for the LFPB, the current is 0.3C. For
instance, the 500kVA is configured to 40 blocks of 12V/500AH batteries, which can
provides total max charging current of 160A.Due to the current limits(0.2C) , the max
charging current will be 100A(0.2*500A).
5.4.4
Float and BoostCharge Setting
In boost charging, the system charges the batteries with constant current. After the period, the
system will enter the float charging.
For the Lead-Acid battery ,the default float charge voltage per cell is 2.25V, boost charge voltage
is 2.35V
；
For the LFPB, the default float and boost charge voltage per cell is 3.45V
5.4.5 EOD Voltage Setting
The EOD voltage 0.6C is the EOD voltage when the discharging current is larger than 0.6C;
EOD voltage 0.15C is the EOD voltage when the discharging current is less than 0.15C.EOD
voltage decreases linearly as the EOD voltage Current increases from 0.15C and 0.6C, as shown in
Figure5-3.
0
0. 05
0. 1
0. 15
0. 2
0. 25
0 . 3
0. 35
0. 4
0. 45
0. 5
0. 55
0. 6
0. 65
0 . 7
0. 75
EOD voltage 0.15C
EOD voltage 0.6C
Figure 5-3
EOD voltage
For Lead-Acid battery, the cell voltage is suggested to set to 1.65V/cell at 0.6C, and set to 1.75V
at 0.15C
For the LFPB battery, the cell voltage is suggested to set to 2.7V/cell at both 0.6C and 0.15C.
5.4.6 Charging Current PercentLimit
This setting is for limiting the charging power, max current limit can be 20% of
the rated active power. The max current that one power unit can give according to the
current limit (in percentage) is shown in Table 5-1.
The actual charging current is also limited to the battery capacity. Refer to
