B400R 1-3kVA User Manual
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4.4 Operation procedure of external battery for long backup time model
(“S” model)
(1) Use the battery pack with voltage:
36VDC for 1KS (12V x3 batteries) for B400R-010-B (C)
48VDC (12V x4 batteries) for the B400R-020-B (C)
72VDC (12V ×6 batteries) for the B400R-030-B (C)
Connection of battery quantities that exceed or do not meet the above mentioned quantities will
cause abnormal operation or permanent damage to the UPS.
(2) One hard wired battery terminal on the rear panel is used for connecting the battery pack.
(3) The battery connection procedure is very important. Any incompliance may result in the risk of
electric shock. Therefore, the following steps must be strictly complied with.
(4) Make sure the UPS is isolated from the supply, if there is a battery breaker then turn it off first.
(5) Remove the front panel; connect the battery via Anderson PP45 connectors. Prepare the battery
cable which should be able to carry the current of >50A for all models, the cross section area should
be greater than 4mm
2
for all models. Battery wire colour is recommended as following:
+
GND
-
Brown
Green/Yellow
Blue
(6) The brown wire is connected to the "+" terminal of the battery. The blue wire is connected to the
"-" terminal of the battery. (Note: the green/yellow wire is grounded for protection purpose.)
(7) Make sure all wires are connected correctly, and install the terminal block cover on the rear
panel of the UPS.
(8) Connect the UPS to the load. Then, turn on the mains switch or connect the power cord of the
UPS to utility power supply, the battery would start to be charged.
Caution:
A DC Breaker must be connected between the UPS and external battery.
Caution:
The output terminals of the UPS system may still be electrically live even if the UPS has been
disconnected from mains or if the Bypass switch is in the “OFF” Position
