⎯
414
⎯
6
F
2
S
0
8
4
6
b. VT failure supervision
The undervoltage element for VT failure supervision (UVFS, UVFG) is set to about 50% of
the rated voltage.
Element Setting
UVFS 52V
UVFG 30V
c. Weak infeed tripping function
The undervoltage element for weak infeed tripping (UVLS, UVLG) is set to 70% of the
rated voltage.
Element Setting
UVLS 77V
UVLG 45V
3.9 Time
setting
a. Time delay setting for zone distance protection
b. Coordination time setting for protection signaling channel
This time setting is required only for the Blocking scheme. The time should be set larger
than the time delay of protection signaling equipment (PSE) including propagation time of
PLC (Power Line Carrier) or other communication link. The time setting should include an
operation margin of 5ms.
Time setting = Time delay of PSE + Margin
= 12ms + 5ms
=
17ms
c. Time setting of earth fault element EF (TEF)
This time setting is for time delay of the EF element. If it is set to 3s, the trip/alarm contact
will close 3s after detecting an unbalance current (residual current) such as a CT open
circuit fault. In addition to CT open circuit faults, this element can detect a broken
conductor condition.
d. Time setting of directional earth fault relay (TDEF)
Set the time delay for the directional earth fault element for back-up.
Element Setting
(s)
TZ1S 0.00
TZ2S 0.30
TZ3S 0.40
TZ1G 0.00
TZ2G 0.30
TZ3G 0.40
TCHD 0.017
TEF 3.00
TDEF 3.00
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: ......