This can suppressed with locking.
The switching states four big lines and their capacitive current can taken into
account.
Locking can prevent the P-coil from being automatically adjusted grid components have
to switched deactivated during lengthy earth fault searches.
Default setting: OFF:
0 Ipos correction
To further minimize the current across the faulty section, the REG-DP resonance regulator
can adjust the P-coil when earth fault occurs.
The below table shows the list options for the regulator's behaviour:
ICE
Ipos
A
abs(IF)
A
ICE +
Idetuning
a)
b)
ICE_2
c)
Figure 77: Ipos the event earth fault based the selected correction method
. binary input tells the REG-DP/ REG-DPA whether the line switched OFF.Page 107
Detailed description REG-DP/ REG-DPA parameters
0 Locking
The above describes how the regulator automatically starts new tuning process the end
of the delay time set for earth fault. locking en-
abled, the regulator switches MAN mode after the transient earth fault time and must be
switched back AUTO mode either manually, through the SCADA system onsite
