NOTE
Note that for safety reasons the circuit breaker closing time is preset to ∞, asynchronous connection is
therefore not possible using the delivery setting. In this case the indication
Syx ParErr
for the selected
synchronizing function group x is issued.
If the circuit breaker closing time via evaluating fault records is obtained, in this way the measured value
can be directly transferred. On the contrary, if an external timer is used, the measured time of an internal
running time of 22 ms at f
N
= 50 or 60 Hz and of 42 ms at f
N
= 16.7 Hz is to be add.
With the Balancing U1/U2 (address 6121) different VT ratios of the two parts of the power system can be
considered (see example in the following Figure 2-28). In order that the device can compare both secondary
voltages, the voltage U2 is multiplied with the Balancing U1/U2 and this value is also displayed in the
operational measured values.
NOTE
Since voltage U1 is by definition the reference voltage, the secondary voltage U2
sec
alone is multiplied by
the Balancing U1/U2.
[ve6-sync-verschiedene-wandler-280203-oz, 1, en_GB]
Figure 2-28
Station configuration with various VTs
Normally different secondary rated values are rare and the factor remains therefore at 1,00. If the voltage
transformers are differently loaded however, amplitude errors may result. This can be compensated for using
the Balancing U1/U2. The setting value must be established after commissioning on the primary system
(see Commissioning instructions in Chapter 3).
The parameter may also be used to adapt with a transformer tapping switch the individual voltage stages for
synchronization. For this the parameter 6121 can be provided with various values suitable to the individual
voltage levels. If therefore the transformer in the following diagram has 3 stages, 3 synchronizing function
groups are used and set identically except for the parameter 6121.
Functions
2.2 Paralleling Functions
64 SIPROTEC 4, 7VE61 and 7VE63, Manual
C53000-G1176-C163-3, Edition 10.2017
To Next Page
Loading...
