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202 Vnom PRIMARY primary nominal voltage of the voltage transformers V
203 Vnom SECONDARY secondary nominal voltage of the voltage transformers V
213 VT Connect. 3ph specifies how the voltage transformers are connected.
When using the synchronization function the setting Vab, Vbc, VSyn is used if two phase-to-phase
voltages are open delta-connected to the device. You can use any phase-to-phase voltage as the reference
voltage V
SYN
Use the setting Vph-g, VSyn if only phase-to-ground voltages are available. One of these voltages is
connected to the first voltage transformer; the reference voltage V
former. V
at the first voltage transformer and V
1
voltage type (VAN or VBN or VCN).
Connection examples are given under side heading "Voltage Connections" and in the Appendix
Examples).
If you have set Vab, Vbc, VSyn or Vph-g, VSyn, the zero sequence voltage can not be determined.
Table 2-1
in Section
quences of the different voltage connection types.
The operating range of the synchronization function (f
power system, address 214 Rated Frequency.
The corresponding messages of the SYNC function group are pre-allocated for IEC 60870–5–103 (VDEW).
Selecting the SYNC function group in DIGSI opens a dialog box with tabs in which the individual parameters
for synchronization can be set.
General Settings
The general thresholds for the synchronizing function are set at addresses 6101 to 6112.
Address 6101 Synchronizing allows you to switch the entire SYNC function group ON or OFF. If switched
off, the synchrocheck does not verify the synchronization conditions and release is not granted.
Parameter 6102 SyncCB is used to select the switchgear component to which the synchronization settings are
applied. Select the option none to use the function as external synchronizing feature. It will then be triggered
via binary input messages.
Addresses 6103 Vmin and 6104 Vmax set the upper and lower limits for the operating voltage range for V
V
and thus determine the operating range for the synchronization function. Values outside this range will be
2
signaled.
Address 6105 V< indicates the voltage threshold below which the feeder or the busbar can safely be consid-
ered switched off (for checking a de-energized feeder or busbar).
Address 6106 V> indicates the voltage threshold above which the feeder or busbar can safely be considered
energized (for checking an energized feeder or busbar). It must be set below the anticipated operational
undervoltage.
The setting for the mentioned voltage values is made in secondary volts. When using DIGSI for configuration,
these values can also be entered as primary values. Depending on the connection of the voltages these are
phase-to-earth voltages or phase-to-phase voltages.
Addresses 6107 to 6110 are set to specify the release conditions for the voltage check: Where
6107 SYNC V1<V2> = component V
when reference is de-energized, dead line);
6108 SYNC V1>V2< = component V
when feeder is de-energized, dead bus);
6109 SYNC V1<V2< = component V
ence and feeder are de-energized, dead bus / dead line);
6110 Direct CO = connection released without checks.
The possible release conditions are independent of each other and can be combined. It is not recommended to
combine Direct CO with other release conditions.
SIPROTEC 4, 7RW80, Manual
C53000-G1140-C233-4, Edition 07.2018
Voltage Connection (Power System), Page 29
must be de-energized, component V
1
must be energized, component V
1
and component V
1
is connected to the third voltage trans-
SYN
at the third voltage transformer must belong to the same
2
provides information about the conse-
± 3 Hz) refers to the nominal frequency of the
Nom
2
must be de-energized (connection
2
must both be de-energized (connection when refer-
2
Functions
2.7 Synchrocheck
(phase-to-phase) in kV;
1
phase-to-phase) in V;
1
C Connection
must be energized (connection
or
1
85
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