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Configurable autoreclose:
User can configure the autoreclose condition by using the PLC function.
Two- to five-shot autoreclose
Any of two- to five-shot reclosing can be selected. In any case, the first shot is selected from three
types of autoreclose modes as described in the above first-shot autoreclose. All successive shots
(up to five times), which are applied if the first shot fails, are three-phase tripping and reclosing.
The autoreclose can also be activated from an external line protection. At this time, all autoreclose
modes described above are effective.
2.5.2
Scheme Logic
Figure 2.5.1 shows the simplified scheme logic for the first-shot autoreclose. Autoreclose for a
further fault incident becomes ready when the circuit breaker is closed and ready for autoreclose
(CB READY=1) and the on-delay timer TRDY is picked up, the [ARCEN], [ARCEN-S] or
[ARCEN-C] is set to "ON". The TRDY is used to determine the reclaim time.
TRDY
529
t
0
1632
CB READY
&
0.0-600.0s
[ARCEN]
+
"ON"
≥1
[ARCEN-S]
+
"ON"
[ARCEN-C]
≥1
+
"ON"
ARC1 INIT (Trip command)
ARC2 INIT (Trip command)
ARC-SUCSESS
≥1
ARC-FT
If the autoreclose is ready, the autoreclose is activated by ARC1 INIT or ARC2 INIT. The ARC1
INIT and ARC2 INIT are programmed from tripping commands of various protection by PLC
function. Further the external tripping command signal EXT.TRIPA, EXT.TRIPB, EXT.TRIPC
530
S
ARC IN-PROG
&
F/F
R
&
S
F/F
R
Multi-phase trip
1649
Single-phase trip
1651
ARC1-C INIT
&
S
F/F
R
SP1
Multi-phase trip
ARC-SHOT1
1665
Single-phase trip
1667
ARC2-C INIT
Figure 2.5.1 Autoreclose Scheme Logic
T1S1
t
0
&
&
[ARCEN]
0.01-300.00s
+
"ON"
ARC1-S1 COND
T1S1S
t
0
&
0.01-300.00s
[ARCEN-S]
+
"ON"
T1S1C
t
0
&
&
[ARCEN-C]
0.01-300.00s
+
"ON"
1650
ARC1-C COND
T1S1R
t
0
0.01-310.00s
T2S1
t
0
&
&
[ARCEN]
0.01-300.00s
+
"ON"
ARC2-S1 COND
T2S1S
t
0
&
0.01-300.00s
[ARCEN-S]
+
"ON"
T2S1C
t
0
&
&
[ARCEN-C]
0.01-300.00s
+
"ON"
1666
ARC2-C COND
T2S1R
t
0
0.01-310.00s
⎯
⎯
96
6 F 2 S 0 8 4 2
Coordination
≥1
538
ARC-SHOT1
543
TW
≥1
≥1
≥1
0.01-10.00s
ARC-SHOT2
3
4
5
ARC1-S1 TRR
-S2 TRR
-S3 TRR
-S4 TRR
551
-S5 TRR
≥1
ARC2-S1 TRR
-S2 TRR
-S3 TRR
-S4 TRR
-S5 TRR
STEP COUNTER
SP1
CLK
SP2
SP3
SP4
SP5
537
ARC-SHOT
≥1
ARC FT
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