User Manual 200 kVA-1200 kVA UPS 5 Operation
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Step 6: Debug single UPS
After confirming the parameters, disconnect the mains input, bypass input, output switch, the battery and system
output switch of all UPSs to debug single UPS orderly and confirm that UPS is in good condition. Record the
output voltage of UPS, compare the three-phase output voltage of UPS, and confirm the effective difference of
three-phase voltage between any two UPSs. After confirmation, power off the UPS and disconnect all switches of
UPS. Refer to Chapter 5.1 ~ 5.9 for specific debugging steps of single UPS.
Step 7: Start the parallel system
Confirm the main circuit and bypass of the system, and then close the output air switch of all UPSs, and then start
each UPS separately. The starting operation of the parallel system is consistent with that of a single UPS.
Step 8: Add the battery
Check the monitoring homepage to confirm that all UPSs have been switched to the inverter mode. After the
system output is normal, add the battery pack and close the battery switch. If the batteries are independent, close
the battery switch of each UPS respectively. The "Battery disconnected" disappears from the alarm bar of e each
UPS 3min after closing. The main page can be observed and monitored to confirm that the battery is connected
properly. Observe the energy flow diagram on the home to confirm that the battery is connected properly.
Step 9: Test switching
1. Disconnect the mains input switch of each UPS, and check whether all UPSs are normally switched to the
battery mode through the home of the monitoring panel.
2. Close the mains input switch of each UPS, enable [Shut to bypass], and observe whether all UPSs can
normally switch to the bypass mode through the home of the monitoring panel.
Step 10: Close the main output switch
Switch each UPS back to the inverter mode, then close the main output switch, observe the load in the energy
flow diagram in the home, the load is displayed a certain percentage of value, and in this method, the whole
parallel system startup process has been completed.
5.9.2 Shut Down Parallel System
Operation procedures:
Step 1: Turn off all loads.
Step 2: Perform "Shutdown" operation for each UPS, and the shutdown operation procedure is same with that of a
single UPS.
Step 3: Approximately 5 min after completion of Step 2, turn off the main output switch, and the output switch,
battery switch, bypass input switch and mains input switch of each UPS successively. In this way, the whole
equipment is powered down.
5.9.3 Emergency Power Off (EPO)
In addition to emergency shutdown and switching to bypass and disconnection of output after shutdown, users can
choose to perform EPO operation on the failed UPS or EPO operation on all the UPS of the parallel system.
Specific wiring modes are shown in Fig. 3-22 and 3-23.
5.9.4 Single UPS Exits from Maintenance
Operation procedures:
Step 1: When UPS fails, output will be automatically disconnected and the failed UPS will exit from the parallel
system. Other UPS will continue to supply power to the system. If it is required to maintain the UPS that is
working normally, perform “Shutdown” operation.
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