Protection - DEMA 400 Series User Manual

The settings that can be made in the menu are described below.
4.3.3.1.1

Protection

It can be selected 'Active' or 'Passive'.According to the treshold situation, the protection is
activated in the active state and disabled in the passive state.
4.3.3.1.2 Start Value
It is the screen in where the protection of the phase-to-neutral voltage value is set when the
protection is active. The selection is made in the (2 - 260) V range.
4.3.3.1.3 Operate Delay
The operation delay determines the characteristic of the protection curve with the delay type.
In the case of voltage protection, the delay type must be DMT. This delay is expressed by the
term tI >> and may be in the range of 0.02 to 300 s.
4.3.3.1.4 Reset Delay
According to the menu settings, exceeding 200V and without breaker tripping, It was selected
to count the DMT (constant time) reset time (0.04 s) after the voltage exceeds 200V. Thus,
after the voltage exceeds the threshold, 40 ms will be counted. If the threshold is not exceeded
OverVoltage Protection Display
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