Delta DPS-500K, User Manual

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5 - 1 8
Ultron DPS Series
y
Do not connect the batteries in reverse.
y
Use a voltage meter to measure whether the total voltage, after battery connection, is
around 12.5 Vdc × the total number of batteries.
y
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
th
and 21
st
batteries.
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 .
(Figure 5-16: External Battery Cabinet Connection)
1 2 20 21 22 40
+ - + - + - + - + - + -
(
+
) (
-
)
(N)
(
+
) (
-
)
(N)
UPS’s Battery Input Terminlas
Protective Device
External Battery
Cabinet
y
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
UPS Rating (kVA) 300 400 500
DC Fuse
9ROWDJH•9GF
800 A 1000 A 1200 A
4-Pole DC Circuit Breaker
3HUSROHYROWDJH•9GF
800 A 1000 A 1200 A
3-Pole DC Circuit Breaker
3HUSROHYROWDJH•9GF
800 A 1000 A 1200 A
Battery Cable
185mm
2
*2 PCS
or
400 kcmil *2 PCS
300mm
2
*2 PCS
or
600 kcmil *2 PCS
185mm
2
*3 PCS
or
400 kcmil *3 PCS