Functions
2.19 Synchronization Function
SIPROTEC, 7SJ62/64, Manual
C53000-G1140-C207-2, Release date 01.2008
311
Before granting a release for connecting the energized component V
1
and the de-energized component V
2,
the
following conditions are checked:
• Is the reference voltage V
1
above the setting value
Vmin
and
V>
, but below the maximum voltage
Vmax
?
• Is the voltage to be synchronized V
2
below the threshold
V<
?
• Is the frequency f
1
within the permitted operating range f
Nom
±
3 Hz?
After successful termination of the check the release is granted.
For switching the de-energized component 1 to the energized component 2 or connecting the de-energized
component 1 to the equally de-energized component 2 the conditions to be fulfilled correspond with those
stated above.
The associated messages indicating the release via the corresponding condition are as follows:
„25 V1>
V2<“
,
„25 V1< V2>“
and
„25 V1< V2<“
.
Via binary input
„>25 V1>V2<“
,
„>25 V1<V2>“
and
„>25 V1<V2<“
, release conditions can be issued ex-
ternally provided the synchronization is controlled externally.
Parameter
TSUP VOLTAGE
(address
6111
) can be set to configure a monitoring time which requires above
stated release conditions for de-energized connection to be fulfilled at least this time before switching is al-
lowed.
2.19.1.5 Direct Command / Blocking
Parameter
Direct CO
can be set to grant a release without performing any checks. In this case switching is
released immediately when initiating the synchrocheck. It is obviously not reasonable to combine
Direct CO
with other release conditions.
If the synchrocheck fails, depending on the type of failure a direct command bypassing any checks may be
issued or not (also see "Plausibility check / SYNC Error").
Via binary input
„>25direct CO“
this release can also be granted externally.
Blocking the entire synchrocheck is possible via binary input
„>BLK 25-1“
. The message signaling this con-
dition is made via
„25-1 BLOCK“
. When blocking the measurement is terminated and the entire function is
reset. A new measurement can only be performed with a new measurement request.
Via binary input
„>BLK 25 CLOSE“
it is possible to only block the release signal for closing (
„25
CloseRelease“
). When blocking is active, measurement continues. The blocking is indicated by the
message
„25 CLOSE BLK“
. When blocking is reset and release conditions are fulfilled, the release signal for
closing is issued.
www
. ElectricalPartManuals
. com