Parallel Units Wiring - Delta Ultron HPH Series User Manual

(Figure 5-9: 20/30/40kVA UPS Single Unit Dual Input Wiring Diagram)

5.5.4 Parallel Units Wiring

NOTE:
Prior to wiring, please read Chapter 5.5.1 Precautions Prior to Wiring first.
 Single Input (Parallel Units)
When there is only one AC power source, parallel unit's wiring procedures are as follows.
1. Please follow steps 1~6 stated in section Single Input (Single Unit).
2. Connect the main AC source/ output/ external battery cabinet cables to the wiring terminal
block (please refer to Figures 5-8/ 5-10).
NOTE:
Regarding Figure 5-8, each figure represents that the main AC power is the TN
system and a 3-pole protective device is installed between the UPS and the main AC
power. If your main AC power is the TT system, please install a 4-pole protective
device between the UPS and the main AC power.
3. Use the provided parallel cable to connect the parallel ports on the parallel units. Please
see Figure 2-3~2-4 for parallel port location.
4. Ground the parallel UPSs.
Ultron HPH Series
39