Delta Modulon DPH Series User Manual page 96

The protective device is optional, and its type must be fast-acting DC circuit breaker
or/ and fast-acting DC fuse. When choosing the protective device, please follow the in-
structions below.
1. The protective device's rated current must comply with the current values shown in
Table 5-4.
current of the fast-acting DC circuit breaker or/ and the melting current of the fast-
acting DC fuse) must be 3 ~ 6 times the values shown in Table 5-4. Besides, the
response time of the protective device must be less than 20ms.
3. For the choice of the fast-acting DC fuse mentioned above, the A50QS series from
the supplier Ferraz Shawmut is suggested. Please contact Delta customer service
for relevant information.
4. The maximum tripping current of the fast-acting DC circuit breaker or/ and the
maximum melting current of the fast-acting DC fuse mentioned above are 3 ~ 8
times the values shown in Table 5-4. These maximum values are suggested for
general applications only. For actual maximum values, the maximum short-circuit
capacity of the on-site batteries must be taken into consideration. Please contact
Delta customer service for relevant information.
The external battery cabinet's protective device installation methods are as follows.
Option 1: Installation of a 4-pole DC circuit breaker or DC isolated switch (per pole
Modulon DPH Series
+
N
-
External
Battery
Cabinet
DC Fuse
(Figure 5-18: Installation of a 4-Pole DC Circuit Breaker or
DC Isolated Switch Connected in Series with a DC Fuse)
4-Pole DC Circuit Breaker
or DC Isolated Switch
5-24
+
N
UPS
-