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3-64
Protection Functions
857-UM001A-EN-P – July 2009
Table 3.38 – Setting Parameters of Synchrocheck Stages SyC1, SyC2 (25)
(cont.)
Parameter
Values
SMode
Async; Sync;
Off
UMode
-,
DD,
DL,
LD,
DD/DL,
DD/LD,
DL/LD,
DD/DL/LD
CBtime
0.04 ... 0.6
DIbypass
Digital inputs
Bypass
0; 1
CBCtrl
Open;Close
ShowInfo
Off; On
SGrpDI
Digital inputs
SetGrp
1; 2
Unit
Default
-
Sync
Synchrocheck mode.
Off = only voltage check
Async = the function checks
dU, df and dangle.
Furthermore, the frequency
slip, df, determines the
remaining time for closing. This
time must be longer than "CB
time".
Sync mode = Synchronization
is tried to make exactly when
angle difference is zero. In this
mode df-setting should be
enough small (<0.3Hz).
-
-
Voltage check mode:
The first letter refers to the
reference voltage and the
second letter refers to the
comparison voltage.
D means that the side must be
"dead" when closing (dead =
The voltage below the dead
voltage limit setting)
L means that the side must be
"live" when closing (live = The
voltage higher than the live
voltage limit setting)
Example: DL mode for stage 1:
The U12 side must be "dead"
and the U12y side must be
"live".
s
0.1
Typical closing time of the
circuit-breaker.
-
-
Bypass input. If the input is
active, the function is
bypassed.
-
0
The bypass status. "1" means
that the function is bypassed.
This parameter can also be
used for manual bypass.
-
-
Circuit-breaker control
-
On
Additional information display
about the sychrocheck status to
the mimic.
-
-
The input for changing the
setting group.
-
1
The active setting group.
Description
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