6F2S1915 (0.46)
GRZ200 (Soft 031 & 032)
- 135 -
Figure shows CRL logic. CRL logic can determine the current reversal when the reverse
looking element runs and the forward looking element does not run. If the current reversal is
found, CRL declares for the opposite terminal to block the trip operation immediately. At the
same time, CRL blocks CB tripping at its own terminal. If the condition of current reversal
continues longer than 20ms, CRL lasts to run for setting [
TREBK-Dis
] even after the current
reversal ceases.
1
&
8000001B64
DIS-REVBLK-A
-CX
t 0
0.02s
0 t
TREBK-Dis
0.00-10.00s
≥
1
&
8100001B65
DIS-REVBLK-B
-CX
t 0
0.02s
0 t
TREBK-Dis
≥
1
&
8200001B66
DIS-REVBLK-C
-CX
t 0
0.02s
0 t
TREBK-Dis
≥
1
&
8300001B67
DIS-REVBLK-S
-CX
t 0
0.02s
0 t
TREBK-Dis
≥
1
Forward looking element in phase A
Reverse looking element in phase A
Forward looking element in phase B
Reverse looking element in phase B
Forward looking element in phase C
Reverse looking element in phase C
Forward looking element in three-phase
Reverse looking element in three-phase
0.00-10.00s
0.00-10.00s
0.00-10.00s
1
1
1
Figure 2.3-12 Current reversal logic
The operation of CRL and its effect in the current reversal are follows:
CRL at terminal A2 runs immediately after the fault occurs.
The operation of CRL continues to last for another period of off-delay timer setting
[
TREBK-dis
] even after the reverse looking element does not run and the forward
looking element runs; CRL continuously blocks the local tripping and transmitting a
trip block signal to terminal B2.
Even if operation overlap of the forward looking elements between terminal A2 and
terminal B2 arises due to the current reversal, the operation overlap will disappear during the
operation of CRL. Thus, the false operation on the healthy line of parallel lines can be removed.
When the current reversal occurs in the direction opposite to the above, CRL at terminal B2
will respond similarly.
CRL does not pick up for internal faults; thus, high-speed operation of any protection
scheme is not obstructed.
2.3.7
Carrier signal reception
IED has two types of carrier signal transmission style. One is the general style of outputting
and sending a carrier signal from a binary output and receiving it from a binary input. It is
called “external carrier communication”. The other is a special style that uses the transmission
control function (DIF_COMM) to send and receive carrier signals, which can only be used with
IEDs that has the DIF_COMM function. It is called “integral carrier communication”.
Figure 2.3-13 shows how to receive carrier signals from the remote terminal 1. In the external
Содержание GR 200 Series
Страница 1047: ...6F2S1915 0 46 GRZ200 Soft 031 032 1026 Figure 8 3 4 Screen shot from GR TIEMS ...
Страница 1354: ...6F2S1915 0 46 GRZ200 Soft 031 032 1333 Appendix 1 Signal list for common function ...
Страница 1369: ...6F2S1915 0 46 GRZ200 Soft 031 032 1348 Unit mm Panel cut out for 1 2 case size Figure 2 2 3 Panel cutout figure 1 2 size case ...
Страница 1410: ...6F2S1915 0 46 GRZ200 Soft 031 032 1389 This page is intentionally blank ...
Страница 1480: ...6F2S1915 0 46 GRZ200 Soft 031 032 1459 Appendix 6 Ordering ...
Страница 1497: ...6F2S1915 0 46 GRZ200 Soft 031 032 1476 Appendix 7 Technical data ...
Страница 1518: ...6F2S1915 0 46 GRZ200 Soft 031 032 1497 Appendix 8 Manufacture setting ...
Страница 1520: ...6F2S1915 0 46 GRZ200 Soft 031 032 1499 Appendix 9 Matrix between VCT terminals and relay applications ...
Страница 1523: ...6F2S1915 0 46 GRZ200 Soft 031 032 1502 Appendix 10 CT requirement ...
Страница 1531: ...6F2S1915 0 46 GRZ200 Soft 031 032 1510 Appendix 12 Engineering exercise ...
Страница 1563: ......