Toshiba GR 200 Series, Инструкция по эксплуатации

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6F2S1915 (0.46)
GRZ200 (Soft 031 & 032)
- 83 -
CTI
Busbar A
Busbar B Busbar C
Busbar D
Zone2
(X)
Zone1 (X)
TZ1
X
Zone3 (X)
Y
Zone1
(Y)
Zone2
(Y)
TZ3
Reach
Y Q
Z
P
Line AB Line BC
Line CD
TZ2
(Y)
X
TZ2
(X)
Figure 2.1-54 Setting zone2 when line BC is shorter than line AB
Tips: For the reach and delay settings about the CTI to the zone 2, the user is generally
required to check the selectivity that is influenced with the slowest timer of the
following protection relays: (1) Busbar, transformer, and breaker-failure relays at
the remote end and (2) line protection relay on the adjacent lines.
(iii)
Setting for far adjacent lines (Zone3 serviced as a backup relay)
The zone3
(X)
will be served as a backup relay for far adjacent lines, if the coordination could be
satisfied with the zone2
(Y)
; then, the user should set the reach of the zone3
(x)
that can cover the
remote-end of the longest adjacent line whenever possible. Note that the effect of fault infeed
should be taken into account at the remote busbars. If the line-configuration is similar to the
one in Figure 2.1-53, the user is only required to think of the coordination between the settings
TZ3
(X)
, TZ2
(X)
, and TZ2
(Y)
.
CTI
Busbar A
Busbar B Busbar C
Busbar D
G
Zone2
(X)
Zone1
(X)
TZ1
X
Zone3
(X)
Y
Zone1
(Y)
Zone2 (Y)
Reach
X
Y Q
Z P
Line AB Line BC
Line CD
TZ3
(Y)
X
TZ3
(X)
Busbar E
Line BE
Zone3
(Y)
Figure 2.1-55 Zone3 setting when the line BC is shorter than the line BE
Figure 2.1-55 illustrates that the adjacent line BC is shorter than the adjacent line BE.
For the CTI between the adjacent lines BC and BE, if it is difficult to achieve the coordination