⎯
106
⎯
6 F 2 S 0 8 4 6
The characteristic of the BFR is obtained by the following equation.
X
≥
(R
−
Rs) tan 75
°
where,
R = resistance component of measured impedance
X = reactance component of measured impedance
Rs = reach setting
The characteristic BFL is obtained by the following equation. Polarizing voltage employed is the
same as employed for mho element.
Vp I cos (
φ
+
θ
−
90
°
)
>
0
where,
Vp = polarizing voltage
I = fault current
φ
= lagging angle of I to Vp
θ
= angle setting
A blinder applicable to the offset mho element for the power swing blocking also has the same
characteristics as BFR.
The characteristics of BRR and BRL are expressed by the following equations.
For
BRR
X
≤
(R + Rs) tan 75
°
For BRL
X
≤
(R
−
Rs) tan (180
°
−
θ
)
where,
R = resistance component of measured impedance
X = reactance component of measured impedance
Rs = reach setting
The reach settings of BFR and BRR are made on the R-axis. The BRL setting is interlinked with
the BRR setting.
If the minimum load impedance is known, then assuming a worst case load angle of 30
°
and a
margin of 80%, then the following equation can be used to calculate the blinder element resistive
settings:
R
set
< 0.8
×
Z
Lmin
×
(cos30
−
sin30
tan75 )
Содержание GRZ100 B Series
Страница 264: ... 263 6 F 2 S 0 8 4 6 Appendix A Block Diagram ...
Страница 271: ... 270 6 F 2 S 0 8 4 6 ...
Страница 272: ... 271 6 F 2 S 0 8 4 6 Appendix B Signal List ...
Страница 307: ... 306 6 F 2 S 0 8 4 6 ...
Страница 308: ... 307 6 F 2 S 0 8 4 6 Appendix C Variable Timer List ...
Страница 310: ... 309 6 F 2 S 0 8 4 6 Appendix D Binary Input Output Default Setting List ...
Страница 321: ... 320 6 F 2 S 0 8 4 6 ...
Страница 322: ... 321 6 F 2 S 0 8 4 6 Appendix E Details of Relay Menu and LCD Button Operation ...
Страница 331: ... 330 6 F 2 S 0 8 4 6 ...
Страница 340: ... 339 6 F 2 S 0 8 4 6 Appendix G Typical External Connections ...
Страница 377: ... 376 6 F 2 S 0 8 4 6 ...
Страница 384: ... 383 6 F 2 S 0 8 4 6 Appendix J Return Repair Form ...
Страница 388: ... 387 6 F 2 S 0 8 4 6 Customer Name Company Name Address Telephone No Facsimile No Signature ...
Страница 389: ... 388 6 F 2 S 0 8 4 6 ...
Страница 390: ... 389 6 F 2 S 0 8 4 6 Appendix K Technical Data ...
Страница 401: ... 400 6 F 2 S 0 8 4 6 ...
Страница 402: ... 401 6 F 2 S 0 8 4 6 Appendix L Symbols Used in Scheme Logic ...
Страница 405: ... 404 6 F 2 S 0 8 4 6 ...
Страница 406: ... 405 6 F 2 S 0 8 4 6 Appendix M Example of Setting Calculation ...
Страница 417: ... 416 6 F 2 S 0 8 4 6 ...
Страница 418: ... 417 6 F 2 S 0 8 4 6 Appendix N IEC60870 5 103 Interoperability and Troubleshooting ...
Страница 430: ... 429 6 F 2 S 0 8 4 6 Appendix O Programmable Reset Characteristics and Implementation of Thermal Model to IEC60255 8 ...
Страница 434: ... 433 6 F 2 S 0 8 4 6 Appendix P Inverse Time Characteristics ...
Страница 437: ... 436 6 F 2 S 0 8 4 6 ...
Страница 438: ... 437 6 F 2 S 0 8 4 6 Appendix Q Failed Module Tracing and Replacement ...
Страница 444: ... 443 6 F 2 S 0 8 4 6 Appendix R Ordering ...
Страница 447: ......