Tecnoware EVO DSP TM, User Manual

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UPS EVO DSP TT 27 User’s Manual
7.4 Overload Behavior
While operating in Normal or Battery mode, the UPS can feed overloads for a limited duration which is
given in the “Technical Specifications” section. After that duration, UPS automatically switches into
Bypass mode, if the Bypass is enabled and frequency/waveform/RMS value of the Bypass mains voltage
is within limits. If the Overload situation continues in the Bypass operation, thermal/magnetic
protection devices may activate and protect the circuit. In this case, all loads on the output will be
switched off.
Make sure that the UPS is not overloaded to provide a higher quality supply to the loads.
7.5 Electronic Short Circuit Protection
The UPS attempts to force the thermal/magnetic protection devices between the output terminals and
the short circuited load to open, by supplying current to the short circuited load for a limited duration.
The UPS must be working in Battery or Normal mode, for this feature to work.
To enable the short circuit protection feature of the UPS, each load shall be fed over a
separate circuit breaker chosen according to the load current. This should provide quick
disconnection of the short circuited load and operation continuity of the other loads. To
obtain maximum protection, the rating of each individual load circuit breaker shall have
the minimum value, which is enough to carry the full load current continuously.
If the protection device fails to open the circuit in a limited time, the UPS stops feeding current to the
output. “VSECFLR” alarm message is shown on the upper left of the LCD.