UPS IST7 (10KVA-40KVA)
User Manual
2 Overview
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protect the service life of battery. Once the mains recover, the UPS will start automatically and
turn to normal mains power supply mode.
Bypass power supply mode
Under the circumstance of bypass voltage is normal, when UPS off or fault (such as inverter
output overload, over-current surge or IGBT over-temperature etc.) while UPS on, the UPS
will output by bypass. When UPS on and the fault removed, it will turn to inverter output again.
If the same fault occurs more than 5 times in a short time, the UPS protects and output by
bypass until power off manually or power down and remove the fault, restart the UPS and
then it will recover normal work.
Bypass power supply mode (the thick solid line stands for the energy flow direction)
ECO power supply mode
At the ECO mode, when bypass voltage is normal, the power for load is prior supplied by
bypass, when bypass voltage is abnormal, the power for load turns to inverter. ECO mode is
an economic operation mode. For the load which does not require high quality, user can select
ECO mode to reduce the energy consumption. At the ECO mode, the UPS efficiency can up
to 99%.
Maintenance bypass power supply mode
When the UPS needs to be maintained and the power supply for load cannot be interrupted,
user can shut down the inverter and make the UPS works in bypass status, the gate controlled
switch release automatically when open the maintenance bypass cover, then switch on the
maintenance bypass breaker and switch off the mains input breaker and bypass input breaker,
