131
6
F
2
S
0
8
3
4
2.7.2 Scheme
Logic
2.7.2.1 One-breaker Autoreclose
Figure 2.7.2.1 shows the simplified scheme logic for the single-shot autoreclose. Autoreclose for a
further fault incident is available when the circuit breaker is closed and ready for autoreclose (CB1
READY=1), the autoreclose mode by the switch [ARC-M] or the PLC is set to "SPAR", "TPAR"
or "SPAR & TPAR" and the on-delay timer TRDY1 is picked up. The TRDY1 is used to
determine the reclaim time.
"SPAR", "TPAR", "SPAR & TPAR"
&
+
[ARC-M]
5-300s
t 0
&
52A
52B
52C
CB1_READY
1545
TRIP-A
TRIP-B
TRIP-C
[ARC-EXT]
≥
1
≥
1
≥
1
"ON"
"ON"
≥
1
EXT_TRIP-A
1556
EXT_TRIP-B
1557
EXT_TRIP-C
1558
&
TP
F/F
Single-phase trip
+
[ARC-M]
"SPAR", "SPAR & TPAR"
&
&
0.01-10s
t 0
TRDY1
TSPR1
SPR.L-REQ
1824
"Default =CONSTANT 1"
&
Multi-phase trip
+
[ARC-M]
"TPAR", "SPAR & TPAR"
&
&
0.01-100s
t 0
TTPR1
TPR.L-REQ
1825
"Default =SYN-OP"
&
≥
1
&
Single-phase trip
0.01-10s
t 0
TEVLV
Multi-phase trip
+
[ARC-M]
"TPAR", "SPAR & TPAR"
&
≥
1
0.01-100s
t 0
TRR
≥
1
0.1 - 10s
TW1
0.2s
ARC(*)
MSARC
(*)ARC
(For Leader CB)
(For Leader CB)
FT
≥
1
ARC
(For Leader CB)
(For Leader CB)
(For Leader CB)
M-TRIPA
FT
≥
1
0.1s
Trip when ARC1 READY not operated.
Multi phase trip in SPAR.
ARC1 READY
( To Figure
2.10.2.8. )
CT-DG
&
"OFF"
+
[ARC-DEF]
BUP
ARC BLOCK
1544
"OFF"
[ARC-BU]
&
"Disable"
+
[ARC-M]
ARC_BLOCK1
1564
≥
1
ARC FAIL
(For Leader CB)
+
[ARC-SUC]
&
"ON"
Figure 2.7.2.1 Autoreclose Scheme Logic
If the autoreclose is ready, the internal tripping signal TRIP-A, B, C or external tripping signal
EXT_TRIP-A, B, C for each phase of the circuit breaker activates the autoreclose. These tripping
signals are output from the command protection, zone 1 extension protection, and specific zone 1
tripping. Whether or not the external trip signals are used to activate the reclosing is selected by
the scheme switch [ARC-EXT].
Once this autoreclose is activated, it is maintained by a flip-flop circuit until one reclosing cycle is
completed.
Autoreclose is not activated in the following conditions.
•
When the tripping is output by the directional earth fault command protection (CT-DG =1)
and the autoreclose selection switch [ARC-DEF] is set to "OFF".
•
When the tripping is performed by the out-of-step protection (OSTT =1), stub fault protection
(STUB=1), switch-onto-fault protection (SOTF =1) breaker failure protection (RETRIP=1) or
time-delayed backup protection (BUP =1).
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Summary of Contents for GRZ100-211B
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