inform SAVER PLUS DSP SERIES, Руководство пользователя

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In the below diagram, computer serial communication connection via RS232 is shown as an example;
5.1.4 Abnormal Conditions Operating Principles
5.1.4.1 Overload
Connection of loads to the output of the UPS that exceeds the nominal power of the unit is called
“ Overload “.
UPS can feed the load that exceeds the nominal power of the unit for a limited period while operating
online. This period depends on the load quantity and the initial temperature of the overload on the
semiconductors.
The Unit follows up the following procedure in the calculation of the overload time:
It feeds the load for a period which will not cause the output fuses to blow out using a thermal model
which has been formed by considering the output fuses’ thermal characteristic, than it transfers the
load to by-pass line if the bypass input voltage value is within the allowed limits.
Meanwhile if the junction temperature passes over a certain value, than it transfers the load to by-pass
line (assuming the bypass voltage is acceptable) before the calculated time, which has been found out
with the help of thermal model.
Overload time versus overload quantity diagram is shown in the “technical specifications” section of the
user manual.
If the unit is working on by-pass mode during the initial start of the overload or if it has passed to by-pass
mode because of the overload, than the only protection in the system is the automatic fuses in the circuit.
In case of the UPS fuse is switched off than all the loads on the output shall be without energy.
For safe operation, avoid the system from overloading.
.
5.1.4.2 Output Short Circuit
If a short circuit occurs at the output of the unit, UPS acts like a current source (as long as the over
current is drawn, it decreases the output voltage keeping the output current constant at a certain value)
forcing to trigger the fuse that is between the UPS and the short-circuited load. By triggering the