If the zero sequence voltage exceeds the set Uerd_Threshold when earth fault occurs, a
cycle for the residual current increase started providing resistor control enabled. This will ensure that the resis-
tor not switched for too long and overheats (when contact supposed stay
closed).Page 117
Detailed description REG-DP/ REG-DPA parameters
L
N
Resistor on
R_on
+U
H
-UH
R_block
R_auto_on
+U
H
-UH
R_start
R_block
R_auto_off
R_auto_on
SCADA serial
SCADA
REG-DP
Resistor
Binary
Inputs
(BI)
Binary
Outputs
(BO
or
Rel)
Figure 83: Connection examples when resistor control used
Note:
Please switch two relay outputs with function R_on series.
.
Functional description
The zero sequence voltage Une that measured the regulator continuously monitored. The
resistor connected for the duration the set switch-on time after the set delay time has
lapsed (switch-on delay)
