Delta RT Series User Manual page 22

 Battery
Charge
UPS
Voltage
27.3 ± 0.3Vdc
1kVA
at 25 ℃
54.6 ± 0.6Vdc
2kVA
at 25 ℃
81.9 ± 0.9Vdc
3kVA
at 25 ℃
NOTE:
1
* The charge current is shared by the internal and external batteries.
 External Battery Pack
1. To increase the battery backup time, you can connect several external battery packs to the UPS.
2. Delta external battery pack is optional. Please refer to the Quick Guide, User Manual or Installation
& Operation Guide included in the package of the external battery pack.
3. When connecting the external battery pack with the UPS, you must install an appropriate DC
breaker or fast-acting fuses that meets the safety certification. Do not use an AC breaker.
4. The breaker must be a 2-pole DC breaker with features of 2-pole 80Vdc and 7kA (or above) DC
breaking capacity.
Amplon RT Series
Charge
Low Battery Shutdown
*1
Current
Back-up Time < 1 Hour, 10 ~ 100%
= 20.0V ± 3%
Back-up Time < 1 Hour, < 10%
1A
= 21.2V ± 3%
Back-up Time > 1 Hour
= 21.6V ± 3%
Back-up Time < 1 Hour, 10 ~ 100%
= 40.0V ± 3%
Back-up Time < 1 Hour, < 10%
1A
= 42.4V ± 3%
Back-up Time > 1 Hour
= 43.2V ± 3%
Back-up Time < 1 Hour, 10 ~ 100%
= 60.0V ± 3%
Back-up Time < 1 Hour, < 10%
1A
= 63.6V ± 3%
Back-up Time > 1 Hour
= 64.8V ± 3%
22
The Number of
Batteries
12V × 2 PCS
12V × 4 PCS
12V × 6 PCS