Usage Warnings - Delta Modulon DPH Series User Manual

4. The recommended electrical rating of the input, output and backfeed
protective devices are as follows. Application of the protective devices shall be
in accordance with local installation codes.
50kVA
690V/100A
5. Each protective device should have the functions of overcurrent protection,
short circuit protection, insulating protection and shunt trip feature. Please
refer to the table below for the UPS rated short-time withstand current (Icw).
50kVA
10KA
6. When selecting the protective devices, please take each power cable's current
capacity and the system's overload capacity (please refer to
Technical Specifications
of the upstream protective devices must be equal to or larger than the capacity
of the UPS's input protective devices.
7. Due to abnormalities in the UPS, the fault current may reach 20 kA. At the time,
the UPS's internal semi-conductor fuses will take 8 ~ 10 ms to open. Thus, the
reaction time of the upstream*
so that the fuses would have sufficient time to interrupt the fault current, and
the UPS's bypass will be able to keep supplying power to the loads.
NOTE:
* For dual input application, this refers to the bypass upstream.
1
8. If the UPS is supplied by a power source whose neutral is grounded, each
protective device must be a 3-pole type. If the UPS is supplied by a power
source whose neutral is not grounded, each protective device must be a 4-pole
type.
1.3

Usage Warnings

• Only qualified service personnel can upgrade the UPS's firmware.
• Before installation, wiring and working on the UPS's internal circuits, please
completely cut off all power supplying to the UPS, including the input power and
battery power.
Delta UPS DPH 50-200kVA
100kVA
690V/200A
100kVA
10KA
) into consideration. Besides, the short-circuit capacity
protective devices must be more than 10 ms
1
150kVA
690V/300A
150kVA
10KA
200kVA
690V/400A
200kVA
10KA
Appendix 1:
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