
⎯
124
⎯
6 F 2 S 0 8 4 6
Setting of [VCHK]
Energizing control
LB
Reclosed under "live bus and dead line" condition or with synchronism check
DB
Reclosed under "dead bus and live line" condition or with synchronism check
SY
Reclosed with synchronism check only.
OFF
Reclosed without voltage and synchronism check.
When [VCHK] is set to "LB", the line is energized in the direction from the busbar to line under
the "live bus and dead line" condition. When [VCHK] is set to "DB", the lines are energized in the
direction from the line to busbar under the "dead bus and live line" condition.
When a synchronism check output exists, autoreclose is executed regardless of the position of the
scheme switch.
When [VCHK] is set to "SY", a three-phase autoreclose is performed with synchronism check
only.
When [VCHK] is set to "OFF", three-phase autoreclose is performed without voltage and
synchronism check.
The voltage and synchronism check require a single-phase voltage from the busbar or line as a
reference voltage. If the three-phase voltages that are used for the distance protection are supplied
from the line voltage transformer, the reference voltage has to be supplied from the busbar voltage
transformer. On the contrary, if the three-phase voltages that are used for the distance protection
are supplied from the busbar voltage transformer, the reference voltage has to be supplied from the
line voltage transformer.
Additionally, it is not necessary to fix the phase of the reference voltage.
The signal 3PLL shown in Figure 2.6.2.3 is output when all three phase voltages are live, and it is
available by the [3PH-VT] = LINE setting.
To match the busbar voltage and line voltage for the voltage and synchronism check option
mentioned above, the GRZ100 has the following three switches and VT ratio settings as shown in
Figure 2.6.2.4.
[VTPH-SEL]: This switch is used to match the voltage phases. If the A-phase voltage or
A-phase to B-phase voltage is used as a reference voltage, "A" is selected.
[VT-RATE]: This switch is used to match the magnitude and phase angle. "PH/G" is
selected when the reference voltage is a single-phase voltage while "PH/PH" is
selected when it is a phase-to-phase voltage.
[3PH-VT]:
"Bus" is selected when the three-phase voltages are busbar voltages while
"Line" is selected when they are the line voltages.
VT:
This setting is set to the VT ratio of busbar or line voltage for distance
protection
VTs1:
This setting is set to the VT ratio of line or busbar reference voltage for voltage
check and synchronism check.
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: ......