5 Use and Operation
61
Start load according to "high power device→small power device", which is to avoid overload
protection when starting high power device.
----End
5.3 Shutdown Operation
Step 1
Close load and keep the UPS running without load for about10min to exhaust heat.
Step 2
Press "
" and "
"button on the front panel at the same time for 1s to shut down the UPS.
Step 3
Switch off the external battery, bypass and mains switch.
----End
5.4 Parallel SystemOperation
5.4.1 Start Parallel System
Before completely starting the parallel system, please do not start load, and ensure that all
switches of output distribution cabinet are off.
The following steps for start the parallel system:
Step 1
Ensure that each unit of parallel system is installed properly, start each unit of parallel
system according to the
5.2 Startup Operation
one by one.
Step 2
After each unit in parallel system outputs by inverter, measure the inverter voltage of each
paralleled unit. The voltage difference between max. and min. voltage should be within 8V.
Close the breaker of paralleled unit in parallel distribution cabinet, measure the circulating
current of parallel unit, 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 unit too large, it will
Summary of Contents for IST9
Page 1: ...l un I Jet _________ __ AEC IST9 1 0 20 https www uni jet com catalog ibp on line ibp aec ist9...
Page 2: ...UPS IST9 10 20 kVA User Manual...
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Page 52: ...3 Installation 43 Figure3 29 Diagram of 33 mode parallel system wiring of 10kVA 20kVA UPS...
Page 54: ...3 Installation 45 Figure3 31 Diagram of 33 mode parallel system wiring of 30kVA 40kVA UPS...
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