⎯
410
⎯
6
F
2
S
0
8
4
6
The line angle setting is set to 85
°
. Alternatively set to a smaller angle (e.g. 80
°
) in consideration
of higher levels of fault resistance.
<Z1S, Z1XS, Z2S, Z3S, Z4S, Z1G, Z1XG, Z2G element>
Z1S, Z1XS, Z2S, Z3S, Z4S, Z1G, Z1XG, Z2G element settings are calculated as shown in the
following table.
<Z3G, Z4G element>
Zero sequence current compensation is not applied to Z3 or Z4. Z3G and Z4G settings should be
larger than the calculated values because of the underreaching effect without zero sequence
current compensation.
a. Setting condition of Z3G element:
The Z3G element must operate on all faults for which the Z2G element operates.
(lower setting limit: Z3G > Z2G)
The Z3G element must not operate on load current. (upper setting limit), so:
X3G setting = [Zline
×
130%](Z2G setting)
×
2.6(operating margin for no zero phase
sequence current compensation)
×
1.5(operating margin)
= 500% of Zline
b. Setting condition of Z4G element
The operation zone of the Z4G element includes the operating zone of the Z3G element
remote terminal relay.
Element Actual
impedance
(ohms)
k factor
Relay impedance
(ohms)
Z1S 3.692
0.32
Z1XS 5.999
0.53
Z2S 5.999
0.53
Z3S 13.84
1.22
Z4S 16.61
1.46
Z1G 3.461
0.088
0.30
Z1XG 5.999
0.53
Z2G 5.999
0.53
Z3G 23.07
2.03
Z4G 27.68
2.44
PSBSZ -----
2.00
PSBGZ -----
2.00
3.5 Blinder
setting
Zero sequence compensation is not applied to the blinder elements.
Recommended setting: 5.00 ohms
These elements should not operate under maximum load current:
Rset < load impedance/margin
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: ......