Parallel System Initial Startup - Njoy Balder Series User Manual

Step 5.
Then modify the
jumpers on the charger board to
set the charging current (refer
to table below). Be careful that
the maximum charge current
should not exceed the battery
accepted charging current.
Charge current (A) JP06
1A 0
2A 0
3A 1
4A 0
NOTE:
0 = no jumper; 1 = connect with jumper.
IMPORTANT!
The charging current must be adjusted according to the number
of battery cabinets attached to the UPS:
Nr. of battery packs
x 1
x 2
x 3
x 4
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Jumpers on the charging board
JP07 JP08
0 1
1 0
0 0
0 0
Charging current
1A (default)
2A
3A
4A
5.10
Parallel UPS operation
5.10.1

Parallel system initial startup

First of all, please make sure all of the UPSs are
parallel models and have the same configuration.
Step 1.
Turn on each UPS to AC mode respectively. Then,
measure the output voltage of each UPS to check
if the voltage difference between actual output
and setting value is less than 1.5V (typical 1V) with
multimeter. If the difference is more than 1.5V,
please calibrate the voltage by configuring inverter
voltage adjustment (Refer to Program 15) in UPS
settings. the If voltage difference remains more than
1.5V after calibration, please contact your local
distributor or service center for help.
Step 2.
Calibrate the output voltage measurement by
configuring output voltage calibration (Refer to
Program 16) in UPS settings to make sure the error
between real output voltage and the detected value
of UPS is less than 1V.
Step 3.
Turn off each UPS. Then, follow the wiring procedure
in section 4.2.
Step 4.
Remove the cover of parallel share current cable
port on the UPS, connect each UPS one by one with
the parallel cable and share current cable, and then
screw the cover back.
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