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off automatically and protect the battery; When AC comes back, the UPS will
turn on automatically.
• Short-circuit Protection: when the UPS is in inverter mode and there is shock or
short-circuit, UPS will output limited currency, protecting the UPS( When in AC
mode, the UPS will be protected first by input fuse and then transfers to the
inverter working mode).
4.3 Four Kinds of Alarm Function
• When AC fails, and the UPS supplies power, UPS will alarm once every 10
seconds and the beep stops about 40 seconds later.
• When the battery is nearly used up, the UPS will alarm automatically and the
beep frequency is once every 1 second.
• Overload, when the UPS is overloaded, UPS will alarm once every 0,5 second
• Fault, if there is a faulty operation of the UPS, UPS will alarm continuously.
4.4 Lock Phase Function
In AC mode, the UPS system automatically tracks AC phase and ensures that the
output wave form of the inverter is the same with AC voltage wave form. In this way, it
reduces the peak pulse and surge voltage to minimizes the interference and damage
to the equipment.
4.5 The Function of the Self-set Frequency
When the UPS is turned on for the first time, the acquiescence frequency is 50/60Hz;
when it is connected to AC, the frequency is automatically set to 50Hz or 60Hz in
accordance with AC.
5.0 LCD Display
The UPS is equipped with an LCD display. The display shows the following
information:
• Input voltage
• Output voltage
• The battery status/level
• Power usage in percent
• UPS status indication
• Low Battery indication
• Over load indication
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