Reset Delay - DEMA 400 Series User Manual

curves and their parameters are examined in Main Menu> Protection Settings> Protection and
Reset Curves.
4.3.2.4.7

Reset Delay

According to the menu settings, exceeding 5.00 In and without breaker tripping, It was
selected to count the DMT (constant time) reset time (0.04 s) after the current has dropped
below 5.00 In. 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).
4.3.2.4.8 RTMS
Reset Curves are the 'Reset Time Multiplier' used in the Universal Formula. The Reset Type
is activated when selected as IDMT. The setting range of the factor can be selected within the
range (0,025 - 5).
4.3.2.4.9 Trip Zone
Trip area can be selected in forward and reverse direction with ± 90 °.
4.3.2.4.10 Torque Angle
The torque angle must be entered as the zone where the relay is most sensitive to fault
currents. You may notice differences in varied systems. It can be beasically set to 30° .
Torque point is obtained by adding the entered torque angle to the angle of the phase-to-phase
voltage. Protection is carried out in the area of the Torque zone, as much as the Torque Area.
4.3.2.4.11 Direction Mode
Direction mode to protect can be selected 'Forward' or 'Backward '
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