Working Principle; In Ac Mode - Ewent EW3948 Manual De Instrucciones

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When AC fails and the "ON" button on the front panel is pressed, the UPS will
output voltage; if the "OFF" button on the front panel is pressed, the UPS will not
output voltage.
•
It is forbidden to open the case, because there is danger with electricity. If there is
problem, please handle with the instruction of experts.
•
It is forbidden to put container containing liquid inside on the UPS, because it will
cause danger of electric shock or fire when the UPS short-circuits.
•
When the UPS is abnormal, please cut off power immediately and turn to experts
or the dealer for help.
•
As there is no overload protection of the UPS, it cannot be overloaded. Otherwise,
it would cause danger.
•
It is strictly forbidden to place and operate the UPS in the following environment：
Place with inflammable gas or corrosive gas or much dust；
o
Place with very high temperature or very low temperature(above 42℃ or
o
below
0℃) or high humidity(above 90％) ；
o
Place with direct sunlight or near heater；
o
Place with strenuous vibration；
o
Outside
o
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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.
Attention! Please ground the UPS for safety purpose

3.0 Working Principle

3.1 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.
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ENGLISH