Battery And Charging; Main Features; Unattended Operation; Protection - Eminent Ewent EW3941 Mode D'emploi

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2.3 Battery and Charging:

1. When the UPS is connected to AC, the charger will charge the battery fully in about 10 hours.
2. When the battery is used up, please charge the battery immediately so that to prolong the life
of the battery.

3.0 Main Features

3.1 Unattended Operation


Please connect the UPS to AC and press the ON button on the front panel, the UPS is turned
on and the AC outputs stabilized voltage.

When AC fails, UPS will supply power to the equipment immediately. And when the battery is
used up, UPS will turn off automatically.

When AC comes back, UPS will turn on automatically.

3.2 Protection


Battery over discharge protection： when the battery discharges and the UPS is in inverter
mode, the battery will check and monitor the working status of the battery; when the battery
voltage drops to the limited lowest voltage, the inverter will turn off automatically and protect
the battery; When AC comes back, UPS will turn on automatically.

Short-circuit Protection ： when 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).

3.3 Three Kinds of Alarm Function


When AC fails, and the UPS supplies power, UPS will alarm once every 6 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 2 seconds.

When the battery is really used up, the UPS will alarm for a very long time and after

20 seconds, it will turn off automatically.

3.4 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 and minimizes the interference and damage to the equipment.

3.5 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.