6.5.3 Parallel Units Wiring - Delta HPH-60K User Manual

6.5.3 Parallel Units Wiring

Single Input (Parallel Units)
When there is only one AC power source, parallel unit's wiring procedures are as follows.
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2
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Ultron HPH Series UPS
NOTE:
Prior to wiring, please read 6.5.1 Precautions Prior to Wiring
Please follow steps
Connect the main AC source/ output/ external battery cabinet cables to the wiring
terminal block (please refer to Figures 6-9~6-11/ 6-15).
NOTE:
Regarding Figure 6-9~6-11
TN system and a 3-pole protective device is installed between the UPS and the
utility AC power. If your utility AC power is the TT system, please install a 4-pole
protective device between the UPS and the utility AC power.
Use the provided parallel cable to connect the parallel ports on the parallel units.
Please see Figure 5-2 for parallel port location.
Please refer to Chapter 5 : Communication Interfaces to set the parallel switch in
the ON or OFF position.
Ground the parallel UPSs.
WARNING:
1. When UPSs are paralleled, the length of each unit's input cables/ output
cables must be equal. This ensures that the parallel UPSs can equally share
the equipment loads in bypass mode.
otherwise, parallel functions will fail.
1, 2 or 3) through LCD. Otherwise, UPSs can not be started.
stated in section Single Input (Single Unit).
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