26
DMC3S - Manual - 08 - 2021
3.8
CONTROL FUNCTIONS
—
Synchrocheck relay - 25
Common configurations:
Minimum stabilisation time (
t
STAB
)
0.10...10.00 s (step 0.01 s)
Breaker closing time (
t
CB-CLOSE
)
0.02...0.20 s (step 0.01 s)
Synchronisation timeout (
timeout
-SYNC
)
1...20 min (step 1 min)
Synchronisation emission delay (
t
SYNC
)
0.00...60.0
s
0.00...9.99 (step 0.01 s)
1.0...60.0 (step 0.1 s)
Upper voltage limit threshold (
V
max-SYNC
) 0.50...1.50
E
n
-
U
n2
(step 0.01
E
n
)
Lower voltage limit threshold (
V
min-SYNC
) 0.20...1.50
U
n
/
E
n
/
U
n2
(step 0.01
E
n
)
Permitted frequency range for V1, V2 (f
RANGE
)
f
n
±0.5...3.0 Hz (step 0.01 Hz)
Frequency measurement repeatability (
Rof>
-SYNC
)
0.00...0.60 Hz (step 0.05 Hz)
Parameters:
Synchronism/asynchronism threshold (
df-
GRID
)
0.01...0.10 Hz (step 0.01 Hz)
Frequency difference with f1>f2 (
df
12-SYNC
)
0.02...1.00 Hz (step 0.01 Hz)
Frequency difference with f2>f1 (
df
21-SYNC
)
0.02...1.00 Hz (step 0.01 Hz)
Voltage difference with V1>V2 (
dV
12-SYNC
)
0.01...0.40
U
n
/
E
n
-
U
n2
(step 0.01 V)
Voltage difference with V2>V1 (
dV
21-SYNC
)
0.01...0.40
U
n
/
E
n
-
U
n2
(step 0.01 V)
Phase difference with V2 in advance of V1 (
dp
12-SYNC
)
1...60 °(step 1 degree)
Phase difference with V2 behind V1 (
dp
21-SYNC
)
1...60 °(resolution 0.01 V)
No voltage threshold V1 (
V
1
<
-SYNC
)
0.05...0.60
E
n
(step 0.01 V)
No voltage threshold V2 (
V
2
<
-SYNC
)
0.05...0.60
E
n
(step 0.01 V)
Minimum no voltage time V1 (
t
V1
<
SYNC
)
0.00...10.00 s (step 0.01 s)
Minimum no voltage time V2 (
t
V2
<
SYNC
)
0.00...10.00 s (step 0.01 s)
—
VT monitoring - 74TV
Maximum negative sequence voltage threshold for 74VT (
U
2VT>
) 0.05...0.50
E
n
(step 0.01 V)
Negative sequence overcurrent threshold for 74VT (
I
2VT>
)
0.05...0.50
I
n
(step 0.01
I
n
)
Minimum phase voltage threshold for 74VT (
U
VT<
) 0.05...0.50
E
n
(step 0.01 V)
Minimum current variation threshold for 74VT (
D
IVT<
)
0.05...0.50
I
n
(step 0.01
I
n
)
Minimum current disable threshold for 74VT (
I
VT<
) 0.100...25.0
I
n
0.100...0.999
I
n
(step 0.001
I
n
)
1.00...9.99
I
n
(step 0.01
I
n
)
10.0...25.0
I
n
(step 0.1
I
n
)
Alarm delay (
t
VT-AL
)
0.0...10.0 s (step 0.1 s)
—
CT Monitoring - 74CT
Threshold
74CT
(
S<)
0.10...0.95 (step 0.01)
Maximum current threshold 74CT (
I
*
)
0.10...1.00
I
n
(step 0.01
I
n
)
Operating time
S<
(
t
S
<)
0.03...200
s
0.03...9.99 s (step 0.01 s)
10.0...99.9 s (step 0.1 s)
100...200 s (step 1 s)
—
Breaker failure - BF
Phase current threshold for BF (
I
BF
>)
0.05...1.00
I
n
(step 0.01
I
n
)
Residual current threshold for BF (
I
EBF
>) 0.01...2.00
I
n
(step 0.01
I
En
)
Operating time (
t
BF)
0.06...10.00 s (step 0.01 s)
—
Breaker coils control monitoring
Pulse duration CH
2 ÷ 5 ms (step 1 ms)
Pulse duration AP
2 ÷ 5 ms (step 1 ms)
—
Opening command breaker diagnostics
Opening counter threshold (
N.Open
)
0...10000 (step 1)
Command under load counter threshold (
N.MnvLoad
)
0...10000 (step 1)
No load command counter threshold (
N.MnvLoad
)
0...10000 (step 1)
Command under load current threshold (
MnvLoad>
)
0.00...1.00
I
n
(step 0.01
I
n
)
Interrupted current sum threshold (
SumI
) 0...5000
I
n
(step 1
I
n
)
Opening time for calculation
S
I
2
t (
t
break
)
0.05...1.00 s (step 0.01 s)
Interrupted I^2t sum threshold (
SumI^2t
) 0...5000
I
n2
.s (step 1
I
n2
.s)
Maximum admitted opening time (
t
break
>)
0.05...0.50 s (step 0.01 s)
—
Closing command breaker diagnostics
Closing counter threshold (
N.Close
)
0...10000 (step 1)
Maximum admitted closing time (
t
close
>)
0.05...0.50 s (step 0.01 s)
