Usage Warnings - Delta Modulon DPH series User Manual

4. Each protective device should have the functions of over current protection, short
circuit protection, insulating protection and shunt trip feature. Please refer to the
100kVA
5. When selecting the protective devices, please take each power cable's current
capacity and the system's overload capacity (please refer to Appendix 1: Technical
Specifications) into consideration. Besides, the short-circuit capacity of the
upstream protective devices must be equal to or larger than the capacity of the
UPS's input protective devices.
6. When the UPS has abnormalities and input short current reaches 20kA, the UPS's
internal semi-conductor fast-acting fuses need 8ms ~10ms to be fused. Thus, the
upstream protective devices' reaction time should be more than 10ms to let the
UPS's internal protective devices block breakdown and let the UPS transfer to
bypass mode.
7. If the UPS is supplied by a power source whose neutral is grounded, the backfeed
protective device installed as UPS input protection must be a 3-pole type. If the
UPS is supplied by a power source whose neutral is not grounded, the backfeed
protective device installed as UPS input protection must be a 4-pole type.
8. The recommended electrical rating of the backfeed protective device is as follows.
100kVA
690V/ 200A
1.3

Usage Warnings

Before installation, wiring and working on the UPS's internal circuits, please completely
The UPS is specifically designed for information technology equipment and used to
power computers, servers, and associated peripheral devices. If you want to connect
any capacitive loads or non-linear loads (that have serious surge current) to the UPS,
it needs to be de-rated according to on-site applications. For such special applications,
please contact Delta service personnel for the accurate UPS sizing. The UPS is not
suitable for connecting with any asymmetrical loads.
The external slits and openings in the UPS are provided for ventilation. To ensure reli-
able operation of the UPS and to protect the UPS from overheating, these slits and
openings must not be blocked or covered. Do not insert any object into the slits and
openings that may hinder ventilation.
150kVA
10kA 10kA
150kVA
690V/ 300A
1
200kVA
10kA
200kVA
690V/ 400A
1-3
Important Safety Instructions
250kVA 300kVA
10kA 10kA
250kVA 300kVA
690V/ 500A 690V/ 600A