6F2S1915 (0.46)
GRZ200 (Soft 031 & 032)
- 3 -
Figure 1.1-2(b) exemplifies that both the forward line and the busbar are protected using
a CT. Once a fault occurs between the CT and the CB
(N)
, the relay Ry
(S)
for the forward line can
operate, but the relay Ry
(X)
for the busbar may fail to operate to clear the fault. That is, we
should keep in mind that a blind spot never exits in the power system for designing the
protection.
: Circuit Breaker (which is located at M)
Busbar G
Ry
(X)
Ry
(S)
Ry
(U)
M
N
Ry
(V)
Busbar H
Ry
(Q)
Ry
(P)
Ry
(O)
K
L
Ry
(T)
Line
: Protection area by line protection scheme
: Protection area by busbar protection scheme
Ry
(V)
: Protection relay (which is located at V)
M
: Current transformer (which is connected with a relay)
Figure 1.1-1 Two protection schemes for line and busbar
(b)Line and Busbar protected relays with a CT
Ry
(X)
Ry
(S)
N
Line
Busbar G
Ry
(X)
Ry
(S)
N
Line
(a)Line and Busbar protected relays with two CTs isolated
Busbar G
Figure 1.1-2 Protection schemes and the location of the CB
(ii)
Speediness
As mentioned earlier, shortening the fault duration is realized by the speedy operation of the
relay; it is achieved by the high speed signal processing module. However, we have to note that
the operating time of the CB is slower comparted with the one of the processing module.
Additionally, the propagation delay of the communion should also be considered when the
carrier command protection function is considered for the protection.
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 ...
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