⎯
70
⎯
6
F
2
S
0
8
3
5
Permanent fault
When reclose-onto-a-fault is activated when a permanent fault exists, three-phase final
tripping is performed. However, this operation is performed only in the single-shot
autoreclose mode. In the multi-shot autoreclose mode, reclosing is retried as shown below,
for multi-shot autoreclosing.
Multi-shot autoreclose
In a multi-shot autoreclose, low-speed autoreclose is executed up to three times after
high-speed autoreclose fails. The first shot is high-speed autoreclose that functions in the
same manner as described for single-shot autoreclose. Figure 2.10.2.6 shows the simplified
scheme logic for the low-speed autoreclose of the second to fourth shot.
F/F
F/F
F/F
F/F
&
≥
1
SP2
SP1
FT
MSARC1
≥
1
≥
1
FT
MSARC2
SP1
F/F
FT
MSARC3
SP2
5 - 300s
FT
ARC
3
ARC
2
SYN-OP
"S2", "S3", "S4"
+
TP
ARC1
ARC1
t
0
STEP COUNTER
MSARC
SP3
SP2
SP1
MSARC1
TS2R
TS2
5 - 300s
t
0
&
≥
1
5 - 300s
t
0
5 - 300s
t
0
5 - 300s
t
0
5 - 300s
t
0
MSARC2
MSARC3
TS4R
FT
FT2
FT1
TS4
TS3R
TS3
&
SP2
SP1
&
SP3
FT3
&
≥
1
&
≥
1
≥
1
&
&
&
CLR
CLOCK
1
0.1s
0
t
MSARC
≥1
FT
"S3"
"S4"
"S2"
[ARC-SM]
[ARC-SM]
0.5s
Figure 2.10.2.6 Scheme Logic for Multi-Shot Autoreclose
The multi-shot mode, two shots to four shots, is set with the scheme switch [ARC-SM].
In low-speed autoreclose, the dead time counter TS2 for the second shot is activated if
high-speed autoreclose is performed (ARC = 1), but tripping occurs again (TP = 1). Second shot
autoreclose is performed only when the voltage and synchronism check element operates
(SYN-OP = 1) after the period of time set on TS2 has elapsed. At this time, outputs of the step
counter are: SP1 = 1, SP2 = 0, and SP3 = 0.
Autoreclose is completed at this step if the two-shot mode is selected for the multi-shot mode.
Therefore, the tripping following the "reclose-onto-a-fault" becomes the final tripping (FT = 1).
If the voltage and synchronism check element does not operate within the period of time set on
the timer TS2R which is started at the same time as TS2 is started, the multi-shot autoreclose is
cancelled (FT = 1).
Summary of Contents for GRL100-101A
Page 223: ... 222 6 F 2 S 0 8 3 5 ...
Page 228: ... 227 6 F 2 S 0 8 3 5 Appendix B Signal List ...
Page 256: ... 255 6 F 2 S 0 8 3 5 Appendix C Variable Timer List ...
Page 258: ... 257 6 F 2 S 0 8 3 5 Appendix D Binary Output Default Setting List ...
Page 269: ... 268 6 F 2 S 0 8 3 5 ...
Page 270: ... 269 6 F 2 S 0 8 3 5 Appendix E Details of Relay Menu ...
Page 279: ... 278 6 F 2 S 0 8 3 5 ...
Page 288: ... 287 6 F 2 S 0 8 3 5 Appendix G Typical External Connection ...
Page 326: ... 325 6 F 2 S 0 8 3 5 Appendix J Return Repair Form ...
Page 330: ... 329 6 F 2 S 0 8 3 5 Customer Name Company Name Address Telephone No Facsimile No Signature ...
Page 331: ... 330 6 F 2 S 0 8 3 5 ...
Page 332: ... 331 6 F 2 S 0 8 3 5 Appendix K Technical Data ...
Page 343: ... 342 6 F 2 S 0 8 3 5 ...
Page 344: ... 343 6 F 2 S 0 8 3 5 Appendix L Symbols Used in Scheme Logic ...
Page 347: ... 346 6 F 2 S 0 8 3 5 ...
Page 348: ... 347 6 F 2 S 0 8 3 5 Appendix M Multi phase Autoreclose ...
Page 351: ... 350 6 F 2 S 0 8 3 5 ...
Page 352: ... 351 6 F 2 S 0 8 3 5 Appendix N Data Transmission Format ...
Page 358: ... 357 6 F 2 S 0 8 3 5 Appendix O Example of DIF and DIFG Setting ...
Page 364: ... 363 6 F 2 S 0 8 3 5 Appendix Q IEC60870 5 103 Interoperability ...
Page 377: ... 376 6 F 2 S 0 8 3 5 ...
Page 378: ... 377 6 F 2 S 0 8 3 5 Appendix R Failed Module Tracing and Replacement ...
Page 384: ... 383 6 F 2 S 0 8 3 5 Appendix S PLC Setting Sample ...
Page 386: ... 385 6 F 2 S 0 8 3 5 Appendix T Ordering ...
Page 392: ......