AEG IST7, Руководство пользователя

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IST Series UPS (10kVA-200kVA)
User Manual 5 Use and Operation
79
back-end of UPS2 output breaker. Measure the voltage difference of phase-B and phase-Cas
the same way. If the phase sequence is right, the voltage different of each should less than
5V; if the phase sequence is not right, there is at least one phase voltage difference greater
than 5V. Measure whether the bypass sequence of each paralleled UPS is right (when
measure other UPSs’ phase sequence, it doesn’t need to operate the breaker. Maintain the
output of UPS1 is closed and the output breaker of other UPSs are not closed). If all bypass
phase sequence of all UPS are right, go on the next step; if the phase sequence of any one
UPS is not right, power off the system and check the input and output wiring of each UPS is
right.
Step 9
Close the output breaker of all UPS.
Ensure that each UPS is with no abnormal, close the output breaker of all UPS successively.
Ensure that the output end of all UPS stay in parallel status.
Step 10
Start the inverter of each UPS.
Ensure that the system is with no abnormal, manually start each UPS successively. System
start inverter power supply. Monitor that there is no abnormal alarm.
Step 11 Shut down the inverter of each UPS.
Ensure that each UPS is with no abnormal, shut down the inverter of all UPS, the system
turns to bypass power supply.
Step 12
Close the total output breaker of load.
After the parallel system turns to bypass power supply, close the total output breaker of load,
system bypass supplies power for load.
Step 13
Start each UPS successively, the system turns to inverter power supply.
----End
5.4.2 Shutdown Parallel System
If the system bypass is normal, after shutting down the UPS, the system will turn to bypass
power supply mode; if the system bypass is abnormal, after shutting down the UPS, the
system will turn to no output mode, the system output is outage.