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127
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6 F 2 S 0 8 4 6
Use of external automatic reclosing equipment
To use external automatic reclosing equipment instead of the built-in autoreclose function of the
GRZ100, the autoreclose mode is set to "EXT1P" or "EXT3P". When "EXT1P" is selected, the
GRZ100 performs single-phase tripping for a single-phase fault and three-phase tripping for a
multi-phase fault. When "EXT3P" is selected, three-phase tripping is performed for all faults. At
the same time, one binary signal for individual phase is output as an autoreclose start signal.
2.6.2.2 Two-breaker autoreclose
As shown in Figure 2.6.2.6, in the one-and-a-half breaker busbar arrangement, two circuit
breakers, the busbar breaker and the center breaker, must be reclosed. The GRZ100 series 300s
and 500s are provided with the two-breaker autoreclose scheme.
Multi-shot autoreclose is not applicable to two-breaker autoreclose; the scheme switch [ARC-SM]
is set to "OFF" for a default setting.
Autoreclose is not activated when an autoreclose prohibiting binary input signal is applied at the
local or remote terminal.
•
ARC_BLOCK signal common for leader and follower CB
•
ARC_BLOCK1 signal for leader CB
•
ARC_BLOCK2 signal for follower CB
The autoreclose scheme is different depending on the reclosing mode.
Center
breaker
Busbar
breaker
VL2
VL1
VB
Protected line
Adjacent line
Figure 2.6.2.6 One-and-a-Half Breaker Busbar Arrangement
Single-phase autoreclose and single- and three-phase autoreclose
The breaker(s) to be reclosed and the reclosing order can be set by the scheme switch [ARC-CB]
as follows:
Setting of [ARC-CB] Autoreclose mode
ONE
(Set when applied to a one-breaker system)
O1
Only the busbar breaker is reclosed and the center breaker is subjected to final tripping.
O2
Only the center breaker is reclosed and the busbar breaker is subjected to final tripping.
L1
Single-phase autoreclose: Both breakers are reclosed simultaneously.(*1)
Three-phase autoreclose: The busbar breaker is reclosed first. If successful, then the center
breaker is reclosed.
Summary of Contents for GRZ100 B Series
Page 264: ... 263 6 F 2 S 0 8 4 6 Appendix A Block Diagram ...
Page 271: ... 270 6 F 2 S 0 8 4 6 ...
Page 272: ... 271 6 F 2 S 0 8 4 6 Appendix B Signal List ...
Page 307: ... 306 6 F 2 S 0 8 4 6 ...
Page 308: ... 307 6 F 2 S 0 8 4 6 Appendix C Variable Timer List ...
Page 310: ... 309 6 F 2 S 0 8 4 6 Appendix D Binary Input Output Default Setting List ...
Page 321: ... 320 6 F 2 S 0 8 4 6 ...
Page 322: ... 321 6 F 2 S 0 8 4 6 Appendix E Details of Relay Menu and LCD Button Operation ...
Page 331: ... 330 6 F 2 S 0 8 4 6 ...
Page 340: ... 339 6 F 2 S 0 8 4 6 Appendix G Typical External Connections ...
Page 377: ... 376 6 F 2 S 0 8 4 6 ...
Page 384: ... 383 6 F 2 S 0 8 4 6 Appendix J Return Repair Form ...
Page 388: ... 387 6 F 2 S 0 8 4 6 Customer Name Company Name Address Telephone No Facsimile No Signature ...
Page 389: ... 388 6 F 2 S 0 8 4 6 ...
Page 390: ... 389 6 F 2 S 0 8 4 6 Appendix K Technical Data ...
Page 401: ... 400 6 F 2 S 0 8 4 6 ...
Page 402: ... 401 6 F 2 S 0 8 4 6 Appendix L Symbols Used in Scheme Logic ...
Page 405: ... 404 6 F 2 S 0 8 4 6 ...
Page 406: ... 405 6 F 2 S 0 8 4 6 Appendix M Example of Setting Calculation ...
Page 417: ... 416 6 F 2 S 0 8 4 6 ...
Page 418: ... 417 6 F 2 S 0 8 4 6 Appendix N IEC60870 5 103 Interoperability and Troubleshooting ...
Page 434: ... 433 6 F 2 S 0 8 4 6 Appendix P Inverse Time Characteristics ...
Page 437: ... 436 6 F 2 S 0 8 4 6 ...
Page 438: ... 437 6 F 2 S 0 8 4 6 Appendix Q Failed Module Tracing and Replacement ...
Page 444: ... 443 6 F 2 S 0 8 4 6 Appendix R Ordering ...
Page 447: ......