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NOTE:
1. The above-mentioned DC fuse and DC circuit breaker are optional. If you
want to buy any of them, please contact Delta service personnel.
2. If you need to parallel multiple units of external battery cabinets, please
contact Delta service personnel for relevant information.
Please follow Table 5-3: External Battery Cabinet's Protective Device and Figure
5-17: External Battery Cabinet Wiring to connect an external battery cabinet to the
UPS. Please note that only authorized Delta engineers or service personnel can perform
wiring or you can perform wiring only under the supervision of authorized Delta engineers
or service personnel.
ON I
INPUT SWITCH
BYPASS SWITCH
N
R
S
T
R
AC INPUT
(Figure 5-17: External Battery Cabinet Wiring)
To save on your costs and installation space, parallel UPSs can share external battery
cabinets. Please note that the number of the batteries in each paralleled external bat-
tery cabinet must be the same. Please refer to 3.10 Common Battery.
The external battery cabinet's protective device must be planned and designed by
qualified service personnel. The protective device could be either an isolated switch
connected in series with a DC fuse or a DC circuit breaker; please refer to Table 5-3.
When choosing the external battery cabinet's protective device, please take the follow-
ing factors into consideration: (1) over current between the UPS and battery circuit, (2)
short circuit, (3) wire/ cable material, and (4) local electrical regulations. If you have any
ON I
ON I
ON I
MANUAL BYPASS SWITCH
OUTPUT SWITCH
T
N
R
S
S
BYPASS INPUT
UPS OUTPUT
RISK OF VOLTAGE BACKFEED
BEFORE WORKING ON THIS CIRCUIT
Isolate Uninterruptible Power System (UPS)
Then check for Hazardous Voltage between all
terminals including the protective earth
See installation instructions before connecting to the supply
Apparatet er egnet for tilkopling til et IT forsyningsnett
5-19
5
P.S.
AC OUTLET
FUSE
FUSE
AC OUTLET
220/230/240Vac,8A
T
N
240VDC
240VDC
BATTERY INPUT
Installation and Wiring
-
+
N
N
Connect to
an External
Battery Cabinet
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