Delta Ultron Series User Manual page 94

External Battery Cabinet's Protective Device (Option 4)
(Figure 5-51: Installation of a 3-pole DC Circuit Breaker in Series with Optional DC Fuses)
● Common Battery (Only for Parallel UPSs Sharing the Same External Battery
Cabinet(s))
To save on your costs and installation space, the parallel UPSs can share their connected
external battery cabinet(s). See Figure 5-52 for two parallel UPSs sharing one external
battery cabinet as an example.
NOTE:
The following 'common battery' information is not applicable to the UPS using
lithium-ion batteries. For relevant information, please refer to the user manual of
the lithium-ion batteries. Whether you use the lead-acid batteries or the lithium-ion
batteries, please contact Delta service personnel for any battery/ battery cabinet's
setup and configurations.
For common battery application, please install a protective device between each parallel
UPS and its connected external battery cabinet(s).
If the parallel UPSs share the external battery cabinet(s), you have to set each UPS's 'Float
Charge Voltage' (default: 272V) the same, 'Equalized Charge Voltage' (default: 280V) the
same, and each UPS's 'Battery Strings' and 'Charge Current (Max)' even on the LCD.
Please refer to the examples below and 7. LCD Display & Settings.
Example I When (1) two UPSs are paralleled and share one external battery cabinet, (2)
lead-acid batteries are used, (3) the battery capacity is 200AH, (4) there are a
total of 4 battery strings, and (5) the charge current is 80A, please use the LCD
to set each UPS's 'Battery Type' as 'VRLA', 'Capacity' as 200AH, 'Battery
Strings' as 2, and 'Charge Current (Max)' as 40A.
Example II When (1) three UPSs are paralleled and share one external battery cabinet,
(2) lead-acid batteries are used, (3) the battery capacity is 300AH, (4) there
are a total of 3 battery strings, and (5) the charge current is 90A, please use
the LCD to set each UPS's 'Battery Type' as 'VRLA', 'Capacity' as 300AH,
'Battery Strings' as 1, and 'Charge Current (Max)' as 30A.
Ultron DPS Series
94