Note:
The default value between and minutes (120 180 that grid switches can be
completed before new search process starts.2) for longer
than the set search delay.
Default setting: s
11. the zero sequence voltage returns the tolerance range before the
end the delay, the counter reset its maximum predefined time.
Evaluation the absolute value the zero sequence voltage search process started
when the zero sequence voltage either outside the biggest circuit (1) inside the small-
est circuit (2) during the total delay time after the grid switches.
Evaluation the absolute value and angle the zero sequence voltage search process
is started when the zero sequence voltage outside the circuit (3) during the total delay
time after the grid switches.8) (Uref 1.Page 100 Detailed description REG-DP/ REG-DPA parameters
We take care it.
1 Evaluating the absolute value and angle reveals that considerably more grid switches
were performed.
1 The parameter 'Une angle measurement' must enabled and the Usync voltage (refer-
ence voltage) must connected.
0 Delay search by: s
The zero sequence voltage must outside the tolerance range during the delay order
for search start.2 Tuning point
0 Target tuning type
This parameter determines how tuning determined
.1.
The circuit defined relative value the last saved zero sequence voltage.
0 Une tolerance:
A value 20% (default value) means that search process started when the zero se-
quence voltage outside the set tolerance range (Uref 0.
Default setting: 180 s
0 Forced search delay: s
A shorter response time can set for changes that not have take the history the
grid's state into account, for example, switching from manual automatic site or
through the SCADA system.
The factory setting reduce the waiting times during commissioning.3. During the delay
time, the time remaining until the search starts displayed the status bar
