Direction Angle - DEMA 400 Series User Manual

4.3.5.4.3

Direction Angle

It is the screen where Directional Reactive Under Power is set and angle of direction is
selected.This selection can be in (0
4.3.5.4.4 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 Reactive Under Power, the delay type must be DMT.
This delay is expressed by the term tI >> and can take a value between (0 – 150) s.
4.3.5.4.5 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) reactive power under 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).
4.3.5.4.6 Inhibit on Q<
If this setting is active when the device is subjected to low reactive power, the blocking of the
undervoltage protection is activated. If it is passive, blocking of the undervoltage protection is
deactivated.
4.3.5.4.7 Q< Locking Level
When Inhibit on P< is activated, P< Locking Level is displayed on the device display to set
the lock level. This level can be selected in the range of 10 to 1000 W. Ensure that the active
low-power protection level is not selected greater than the minimum voltage rating.
4.3.5.4.8 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 Reactive Under Power start value is set to 100 W,
the hysteresis value is set to 5%, Protection is active when it falls under 100 W; protecton is
disactive when it exceeds 105W. This hysteresis value can be selected from 1% to 20%.
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