Delta Modulon DPH series User Manual page 103

Only use the same type of batteries from the same supplier. Never use old, new and
different Ah batteries at the same time.
The number of batteries must meet UPS requirements.
Do not connect the batteries in reverse.
Use a voltage meter to measure whether the total voltage, after the external battery
cabinet connection, is around 12.5Vdc × the total number of batteries.
The default number of batteries is 40 PCS of 12Vdc batteries connected in string, and
you should connect the external battery cabinet's neutral to the middle 20
batteries. You should use battery cables to connect the external battery cabinet with
the '+', '-' and 'N' terminals marked on the Delta external maintenance bypass cabinet
(optional). If you choose to use the non-Delta external maintenance bypass cabinet,
please contact service personnel for battery configurations. For more information, please
refer to Table 5-3 ~ Table 5-4.
Please follow your UPS rating to install an appropriate protective device for the external
battery cabinet. You can choose to install either (1) a DC circuit breaker or DC isolated
switch connected in series with a DC fuse or (2) a DC circuit breaker. Please refer to
Table 5-5.
The capacity of the protective device must be consistent with the current shown in Table
5-5. If the type of the protective device is a fuse, it must be a fast-acting fuse with melting
current 5 ~ 6 times of the rating current.
Table 5-5: External Battery Cabinet's Protective Device (Battery Default Q'ty:
12Vdc x 40 PCS)
UPS Capacity
200kVA/ 200kW
300kVA/ 300kW
400kVA/ 400kW
500kVA/ 450kW
Power Protective
Module Device's
Q'ty Current
4 500A
6 800A
8 1000A
9 1200A
5-27
5 Installation and Wiring
Protective Device's Voltage
1. 4-pole DC circuit breaker or
DC isolated switch (per pole
2. 3-pole DC circuit breaker or
DC isolated switch (per pole
and 21
th st