Delta Modulon DPH Series User Manual page 100

Use a voltage meter to measure whether the total voltage is around 12.5Vdc × the total
number of batteries after the batteries are connected in series.
The default battery quantity is 40 PCS of 12V batteries connected in series and you
should connect the external battery cabinet's neutral (N) to the middle 20
batteries. You should use battery cables to connect the external battery cabinet to the
UPS's Battery Input terminals '+', '-' and 'N'. Please refer to Figure 5-20.
Please follow your UPS rating to install an appropriate protective device for each exter-
nal battery cabinet. There are four installation methods for selection.
(1) A 4-pole DC circuit breaker or DC isolated switch connected in series with a DC fuse.
(2) A 3-pole DC circuit breaker or DC isolated switch connected in series with a DC fuse.
(3) A 4-pole DC circuit breaker.
(4) A 3-pole DC circuit breaker.
For relevant values, please refer to Table 5-6; for relevant installation diagrams, please
refer to Figure 5-21 ~ Figure 5-24.
Modulon DPH Series
External Battery
Cabinet
+ - + -
1 2
(Figure 5-20: External Battery Cabinet Connection)
WARNING:
A battery leak can short-circuit the batteries and lead to serious accidents. For
safety's sake, you must insulate the batteries from their touched metal cabinets
by installing insulated devices (e.g. insulated trays or boxes) in between. For
relevant information about the insulated materials for such application, please
contact Delta customer service.
UPS's Battery Input Terminals
+ -
( N )
( ) ( )
Protective Device
+ ( N ) -
( ) ( )
+ - + -
20 21
5-24
th
- -
+ +
22 40
and 21 st