⎯
85
⎯
6
F
2
S
0
8
3
5
SY1UV
SY1OV
VB
VL
θ
SY1
θ
2.11.6 Voltage and Synchronism Check Elements OVL, UVL, OVB, UVB and SYN
The voltage check and synchronism check elements are used for autoreclose.
The output of the voltage check element is used to check whether the line and busbar are dead or
live. The voltage check element has undervoltage detectors UVL and UVB, and overvoltage
detectors OVL and OVB for the line voltage and busbar voltage check. The undervoltage
detector checks that the line or busbar is dead while the overvoltage detector checks that it is live.
Figure 2.11.6.1 shows the characteristics of the synchronism check element used for the
autoreclose if the line and busbar are live.
The synchronism check element operates if both the voltage difference and phase angle
difference are within their setting values.
Figure 2.11.6.1 Synchronism Check Element
The voltage difference is checked by the following equations:
SY1OV
≤
VB
≤
SY1UV
SY1OV
≤
VL
≤
SY1UV
where,
VB = busbar voltage
VL = line voltage
SY1OV = lower voltage setting
SY1UV = upper voltage setting
The phase difference is checked by the following equations:
VB
⋅
VL cos
θ
≥
0
VB
⋅
VL sin(SY1
θ
)
≥
VB
⋅
VL sin
θ
where,
θ
= phase difference between VB and VL
SY1
θ
= phase difference setting
Содержание GRL100-101A
Страница 8: ... 7 6 F 2 S 0 8 3 5 6 7 4 Resumption of Service 220 6 7 5 Storage 220 7 Putting Relay into Service 221 ...
Страница 223: ... 222 6 F 2 S 0 8 3 5 ...
Страница 228: ... 227 6 F 2 S 0 8 3 5 Appendix B Signal List ...
Страница 256: ... 255 6 F 2 S 0 8 3 5 Appendix C Variable Timer List ...
Страница 258: ... 257 6 F 2 S 0 8 3 5 Appendix D Binary Output Default Setting List ...
Страница 269: ... 268 6 F 2 S 0 8 3 5 ...
Страница 270: ... 269 6 F 2 S 0 8 3 5 Appendix E Details of Relay Menu ...
Страница 279: ... 278 6 F 2 S 0 8 3 5 ...
Страница 288: ... 287 6 F 2 S 0 8 3 5 Appendix G Typical External Connection ...
Страница 326: ... 325 6 F 2 S 0 8 3 5 Appendix J Return Repair Form ...
Страница 330: ... 329 6 F 2 S 0 8 3 5 Customer Name Company Name Address Telephone No Facsimile No Signature ...
Страница 331: ... 330 6 F 2 S 0 8 3 5 ...
Страница 332: ... 331 6 F 2 S 0 8 3 5 Appendix K Technical Data ...
Страница 343: ... 342 6 F 2 S 0 8 3 5 ...
Страница 344: ... 343 6 F 2 S 0 8 3 5 Appendix L Symbols Used in Scheme Logic ...
Страница 347: ... 346 6 F 2 S 0 8 3 5 ...
Страница 348: ... 347 6 F 2 S 0 8 3 5 Appendix M Multi phase Autoreclose ...
Страница 351: ... 350 6 F 2 S 0 8 3 5 ...
Страница 352: ... 351 6 F 2 S 0 8 3 5 Appendix N Data Transmission Format ...
Страница 358: ... 357 6 F 2 S 0 8 3 5 Appendix O Example of DIF and DIFG Setting ...
Страница 360: ... 359 6 F 2 S 0 8 3 5 Appendix P Programmable Reset Characteristics and Implementation of Thermal Model to IEC60255 8 ...
Страница 364: ... 363 6 F 2 S 0 8 3 5 Appendix Q IEC60870 5 103 Interoperability ...
Страница 377: ... 376 6 F 2 S 0 8 3 5 ...
Страница 378: ... 377 6 F 2 S 0 8 3 5 Appendix R Failed Module Tracing and Replacement ...
Страница 384: ... 383 6 F 2 S 0 8 3 5 Appendix S PLC Setting Sample ...
Страница 386: ... 385 6 F 2 S 0 8 3 5 Appendix T Ordering ...
Страница 392: ......