⎯
58
⎯
6
F
2
S
0
8
3
5
2.9 Fault
Detector
GRL100 model 400s and 500s are provided with a fault detector (FD) which functions as a check
relay and enhances security, or prevents false tripping due to a single failure in the protection
system.
The FD is an independent module and incorporates the following six fault detection elements.
The FD output signal is an ORing of the elements output signals shown in Figure 2.9.1.
•
Current change detection element (OCDF)
•
Multi-level overcurrent element (OCMF)
•
Earth fault overcurrent element (EFF)
•
Undervoltage element for earth fault detection (UVGF)
•
Undervoltage element for phase fault detection (UVSF)
•
Undervoltage change detection element (UVDF)
Figure 2.9.1 Fault Detector Logic
The FD output signal drives two sets of high-speed checking output relays. The checking output
relay resets 60ms(*) after the fault detection elements are reset by clearing the fault.
(*) Reset time is adjustable by PLC function. Default setting is 60ms.
The OCDF operates in response to load current if it is a steeply fluctuating one. When the relay
is used for a line with such a load current, the OCDF can be disabled by short-circuiting
dedicated paired pins on the module with a receptacle.
All the FD elements have fixed operating threshold levels. But if the earth fault current due to
unbalance in the network is significant, the EFF can be desensitized in the same way as described
above.
Note:
To give high independency to the module, the human machine interface on the front panel or
PC has no access to the FD module except for the user configurable binary output relays
mounted on it.
When it is desirable to disable the OCMF, disable the OCDF or desensitize the EFF, take the
following steps:
•
Pull out the FD module. For a description of how the module is removed, refer to Section
6.7.3.
•
Four pairs of pins J1 and J2 are arranged lengthwise on the front at the top of the module
as shown in Figure 2.9.2.
J2:3-4
&
&
+
≥
1
&
≥
1
0.06s
t
0
0.06s
t
0
FD1
FD2
OCMF
EFF
OCDF
UVDF
UVSF
UVGF
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: ......