AEG IST7, Руководство пользователя

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2 Overview
IST Series UPS (10kVA-200kVA)
User Manual
10
Normal mains mode
When the mains normal, AC power is transformed to DC power by PFC, and supply power
for inverter. While rectifying the AC power into DC power, the rectifier eliminates the abnormal
noise wave, noise and unstable frequency, and make the inverter provide stable and clean
power for load. The specific work process is as follows.
When mains normal, the rectifier, inside the power unit, rectify the mains into anode and
cathode DC voltage, and store energy in DC electrolysis for inverter to use. The inverter
absorbs energy from DC electrolysis and inverts to output stable 220Vac voltage. When the
system control card detects the inverter normal, it will supply the inverting voltage to load.
Battery mode
When mains abnormal, system will switch to battery input, the Boost circuit promotes the
battery voltage to a certain value and then supply the DC power to the inverter, that makes
the AC output without interruption phenomenon and then protect the load. The specific work
process is as follows.
When mains abnormal at any time, the rectifier will switch to battery input immediately to
maintain the voltage of DC electrolysis, which guarantee the inverter without power down.
Before battery discharge completely, if mains recovers, the rectifier will switch to mains input
and charge battery at the same time. During the switch between grid power supply and battery
power supply, the inverter output cannot power down.
In battery power supply mode, if mains does not recover normal all the time, and the battery
energy is running out, the UPS will send sound & light alarm, and stop working at the max.
discharge point, and long beeps to alarm. At that time, the load will power down.
Bypass mode
When system abnormal (such as over-temperature, short-circuit, output voltage abnormal or
overload) and exceed the bear range, the inverter will shut down to avoid damage
automatically. If mains still normal at this time, it will turn to bypass to supply power for load.
The specific work process is as follows.
If the inverter circuit fault or inverter overload and exceed the bear range, the UPS will turn to
bypass to output. During bypass power supply, if fault or overload removed, the UPS will start
inverter and begin to supply power for load. When the load is serious overload and exceeds
the bypass bear range, the UPS will close the bypass output, and it will cause user load power
down. When load fault or short circuit, the UPS will switch to bypass to supply power from