Thytronic DMC3S - Control Functions; Synchrocheck Relay - 25; VT Monitoring - 74 TV; CT Monitoring - 74 CT

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 SI
2
t (t
break
) 0.05...1.00 s (step 0.01 s)
Interrupted I^2t sum threshold (SumI^2t) 0...5000 I
n
2
.
s (step 1 I
n
2
.
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)