Page 112 Detailed description REG-DP/ REG-DPA parameters
We take care it. Too high zero sequence voltage the tuned state can overexcite earth
fault detection systems.
Default setting: s
Note:
The parameters Umax_Threshold, Umax_Delay and Umax_Hysteresis apply search pro-
cesses performed AUTO mode. The regulator displays 'Tune'. Moreover, high zero sequence voltage healthy grid in-
creased continuous load for the insulation single phase.
Note:
The parameters Umax_End_Threshold, Umax_End_Priority and
Umax_Hysteresis apply tuning performed AUTO mode. If, for ex-
ample, the zero sequence voltage too high the target tuning point, the coil moved
away from the resonance point until the smaller zero sequence voltage Umax_End has
been reached. this case, the line-to-earth-
voltage must added the zero sequence voltage (absolute value and phase). This why
it possible have too high voltage for least one line-to-earth-voltage.
Default setting:.
A value disables the 'Umax_End' function.
This function makes sense very unbalanced grids with big zero sequence voltage the
resonance point.
0 100
10
-2
10
-1
10
0
10
1
Coil position [%]
Une
in
[%]
Self-extinguishing
current limit
detuning
Umax_end_threshold
Umax_end hysteresis
Figure 81: Umax_End and self-extinguishing current limit; Description
0 Umax_End threshold
This value used set maximum zero sequence voltage for the tuning point
