5 Use and Operation
UPS IST7 (10KVA-40KVA)
User Manual
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Start load
according to "high power device→small power device", which is to avoid overload
protection when starting high power device.
5.3 Shutdown Operation
Close load and keep the UPS running without load for about 10min to exhaust heat.
Press "OFF" combination button (touch screen) for 1s at the same time on the front panel to
shut down the UPS.
Switch off the external battery, bypass and mains switch.
5.4 Parallel System Operation
5.4.1 Start Parallel System
Ensure that each UPS in the parallel system is equipped with the parallel kit (optional) for
parallel and has been set to the same parallel mode through the screen display.
Before completely starting the parallel system, please do not start load, and ensure that all
switches of UPS are off.
The following steps for start the parallel system:
Ensure that each UPS of parallel system is installed properly, start each UPS of parallel system according
to the 5.2Startup Operation one by one.
After each UPS in parallel system outputs by inverter, measure the inverter voltage of each paralleled
UPS. The voltage difference between max. and min. voltage should be within 8V. Close the output
breaker of paralleled UPS, measure the circulating current of parallel UPS, and the current should be
less than 3A.
When the voltage different larger than 8V, measure the output voltage of the UPS and check
if the output are all 220V, if the voltage different larger than 15V, please report it to our
company to maintain it. In addition, once the circulating current of parallel UPS too large, it
