2 Overview
UPS IST7 (10KVA-40KVA)
User Manual
18
Normal mains power supply mode (the thick solid line stands for the energy flow direction)
Battery inverter mode
When mains is abnormal, the rectifier will transfer to battery input immediately, boost the
battery voltage and then maintain the voltage of DC bus voltage to guarantee the inverter
output continuous.
Battery inverter mode (the thick solid line stands for the energy flow direction)
Before the battery stop discharging, if the mains recover normal, the rectifier will transfer to
mains input automatically and charge the battery at the same time. That is to say, the UPS
recover normal mains power supply mode. If the mains always abnormal and the battery is
running up, the UPS will send sound and light alarm and stop working till battery low-voltage
point. At that time, the buzzer long beeps to alarm, the power for load powers down. Under
the circumstance of mains power outage completely, the UPS will shut down about 1min later
automatically and close the power of the UPS to avoid the battery discharge slimly, thus to
