Working Principle; In Ac Mode; Ac Failure - Ewent EW3941 Manual De Usuario


As there is no overload protection of the UPS, it can not be overloaded. Otherwise, it would
cause danger.

It is strictly forbidden to place and operate the UPS in the following environment ：
o Place with inflammable gas or corrosive gas or much dust；
o Place with very high temperature or very low temperature(above 42℃ or below
o 0℃) or high humidity(above 90％) ；
o Place with direct sunlight or near heater；
o Place with strenuous vibration；
o Outside

Please use dry powder fire extinguisher in case of fire; it is forbidden to use fluid fire
extinguisher because it will cause electric shock.

Please put the socket near the UPS, in this way, it is convenient to disconnect the socket and
cut off power in case of emergency.
ALARM！The UPS must be connected with a wire to the ground!

2.0 Working Principle

2.1 In AC mode

When UPS is in normal working mode, AC goes through the filter and the harmful waves are
filtered. After that, AC charges the battery and meanwhile, passes UPS AVR and the filter and
provide power for the equipment.

2.2 AC Failure

When AC fails, the battery will supply power to the inverter and then passes filter and provide
power for the equipment, ensuring the continuous power supply.
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