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Do not connect the batteries in reverse.
Use a voltage meter to measure whether the total voltage, after battery connection, is
around 12.5 Vdc × the total number of batteries.
The default number of batteries is 40 pcs of 12V batteries connected in string, and you
should connect the external battery cabinet's neutral to the middle 20
You should use three cables to connect the external battery cabinet with the '+', '-' and 'N'
terminals marked on the UPS. Please refer to Figure 5-16.
External Battery
Please follow your UPS's rating to install an appropriate protective device for the ex-
ternal battery cabinet. You can choose to install either an isolated switch connected in
series with a DC fuse or a DC circuit breaker. Please refer to Table 5-3.
Table 5-3: External Battery Cabinet's Protective Device
4-Pole DC Circuit Breaker
3-Pole DC Circuit Breaker
Ultron DPS Series
UPS's Battery Input Terminlas
Cabinet
+ -
+ -
1
2
(Figure 5-16: External Battery Cabinet Connection)
UPS Rating (kVA)
DC Fuse
Battery Cable
+
-
( N )
(
)
(
)
Protective Device
+
-
( N )
(
)
(
)
+ -
+ -
+ -
20
21
300
800 A
800 A
800 A
2
185mm
*2 PCS
or
400 kcmil *2 PCS
5-18
th
and 21
+ -
22
40
400
1000 A
1000 A
1000 A
2
300mm
*2 PCS
185mm
or
600 kcmil *2 PCS
400 kcmil *3 PCS
st
batteries.
500
1200 A
1200 A
1200 A
2
*3 PCS
or
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