This auxiliary voltage usually enough to
supply the regulator.2 Connecting the synchronization voltage
The synchronization voltage Usync used reference voltage, when measuring the phase angle for
both zero sequence voltage Une and currents and I2.Page Connecting the measurands the REG-DP
We take care it. The line-to-line voltage U12, for example, can used the synchronization volt-
age. The regulator's data and parameters are buffered and not get lost, which why
it possible use the auxiliary voltage synchronization voltage. The voltage transformed internally into square wave signal
so that special requirements must met, except the required minimum value and synchronicity
with the voltage.
8.
To adjust the P-coil, the regulator usually needs auxiliary voltage 230 VAC the P-coil's motor
drive unit. Other voltages, that are least grid-synchronized and not affected single pole-to-earth fault,
can also used. The input for the synchronization designed for nominal voltage 230 VAC
but voltage VAC also sufficient. When used system with mul-
tiple busbar connectors, the advantage that synchronization voltage always available, irrespective
of the switching state. few calculation methods use these quantities
for regulation purpose.
spring bar Nr.
Ipos
U
S
Row
analog
Inputs
8
8
8
z
b
d
R
22
20
U
0
L1
N
24
26
3
U
ne
100V
U
H
230
VAC
n
e
Imax
Imin
Pot
+
Pot
-
Figure 14: Cabling suggestion for Usync with auxiliary voltage 230 VAC
CAUTION
The right hardware version required wire the synchronization input with 230 VAC. This synchronization voltage synchronizes internal phase-locked loop (PLL),
hence interruptions the synchronization voltage the seconds range have effect, for example,
when switching the internal transformer another busbar.
U
0
auxilliary supply
AC DC
L(+)
L(-)
28 30
3
Pin-Nr.
This information displayed the regulator's status screen pressing <Menu>, <F3>,
<F5>, <F1>, <F5>:
MeasHW: NTZ2 230. The regulator cannot adjust the P-coil fails
