Functions
2.7 SYNCHROCHECK 25
SIPROTEC, 7RW80, Manual
C53000-G1140-C233-1, Release date 10.2010
98
If only phase-to-ground voltages are available, the reference voltage V
1
is connected to the first voltage trans-
former and the additional voltage V
2
to the third voltage transformer.
Figure 2-27 Phase-to-ground voltage connection
Voltage Difference
The parameters 6150 dV SYNCHK V2>V1 and 6151 dV SYNCHK V2<V1 can be set to adjust the permissible
voltage differences asymmetrically. The availability of two parameters enables an asymmetrical release to be
set.
Frequency Difference
The parameters 6152 df SYNCHK f2>f1 and 6153 df SYNCHK f2<f1 determine the permissible frequency
differences. The availability of two parameters enables an asymmetrical release to be set.
Operating Range
The parameters 6154 dα SYNCHK α2>α1 and 6155 dα SYNCHK α2<α1 delimit the operating range for
switching under synchronous system conditions. The availability of two parameters enables an asymmetrical
release range to be set.
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