Direction Angle - DEMA 400 Series User Manual

It is the screen where the Directional Active Over Power's treshold is set when the protection
is active. Selection is in the range of 10000x5W - 1x5W.
4.3.5.1.3

Direction Angle

It is the screen where Directional Active Over Power is set and angle of direction is selected.
Selection is made between (0
4.3.5.1.4 Operate Delay
The operation delay is the value that determines the characteristic of the protection curve with
the delay type. In the case of Directional Active Over Power protection, the delay type must
be DMT. This delay is expressed by the term tI >> and can take a value between (0 – 150) s.
4.3.5.1.5 Reset Delay
According to the menu settings, exceeding 1000x5W and without breaker tripping, It was
selected to count the DMT (constant time) reset time (0.04 s) the active power above
1000x5W .Thus, after the current falls below the threshold, 40 ms will be counted. If the
threshold is not exceeded until the end of this period, the protection function trip time counter
will be reseted. Reset delay thresholds are in the range of (0-60).
4.3.5.1.6 Hysteresis
It allows the selection of the minimum and maximum values for the protection to be activated
by entering the entered value in percentages and the same value being switched off in
percentage. For example, if the Directional Active Over Power Protection start value is set to
1000x5W, the hysteresis value is set to 5%, Protection is active when it exceeds 1000x5W;
protecton is disactive when it falls 950x5W. This hysteresis value can be selected from 1% to
20%.
32UP – Directional Active Under Power
4.3.5.2
The Directional Active Over Power settings are Main Menu> Protection Settings> Power
Protection Settings> Directional Active Under Power
Directional Active Over Power is indicated by P<, P<< in IEC 60617; PI_PDUP_1 ve
PI_PDUP_2 in IEC 61850; 32UP-I-1, 32UP-I-2 in IEEE/ANSI Standards
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