Toshiba GRL100-701B Instruction Manual page 60

far from the fault, but they can operate if the other terminal trips. Transmission of the trip
permission signal continues for the setting time of TSBCT after reset of zone 1, and thus even the
terminal for which the overreaching element has delayed-picked up can also trip.
Z1
R1-CR
≥1
R2-CR
&
[TERM]
+
"3TERM"
Z2
"
[ZONESEL]
"Z2
"
"Z3
Z3
PSB
(PSBS_DET/PSBG_DET
from Figure 2.3.3.2.)
NON_VTF
(from Figure 3.3.5.1.)
R1-CR: Trip perm ission signal from the rem ote term inal 1 in 3 term inal application, or
Trip perm ission signal from rem ote term inal in 2 term inal application.
Signal No. Signal nam e
1856: CAR.R1-1
R2-CR: Trip perm ission signal from the rem ote term inal 2 in 3 term inal application.
Signal No. Signal nam e
1864: CAR.R2-1
Setting
The following shows the setting elements necessary for the PUP and their setting ranges. For the
settings of Z1, Z2, Z3 and UVC, refer to Section 2.3.1.
Element Range
TSBCT 0.00 – 1.00s
CRSCM PUP/POP/UOP/BOP
DISCR OFF/ON
ZONESEL Z2/Z3
PSB - CR OFF/ON
2.3.2.2 Permissive Overreach Protection
Application
In permissive overreach protection (POP), the terminal on which the forward overreaching
element operates transmits a trip permission signal to the other terminal. The circuit breaker at the
local terminal is tripped on condition that the overreaching element of the local terminal has
operated and that a trip permission signal has been received from the remote terminal. That is, POP
determines that the fault exists inside the protected line based on the overlapping operation of the
forward overreaching elements at both terminals. It is possible to use zone 2 or zone 3, as the
forward overreaching element.
The POP is provided with an echo function and weak infeed trip function so that even when the
protection is applied to a line with open terminal or weak infeed terminal, it enables fast tripping of
both terminals for any fault along the whole length of the protected line. An undervoltage element
UVL is provided for weak infeed tripping. (See Section 2.3.2.5 for protection for weak infeed
terminal.)
≥ 1
&
[PSB-CR]
" ON "
Description
Trip carrier signal for CH1
Description
Trip carrier signal for CH1
Figure 2.3.2.1 PUP Scheme Logic
Step Default
0.01s 0.10s
POP
OFF
Z2
ON
 59 
TSBCT
0 t
0.00 – 1.00s
Phase
&
Selection
CS (Carrier send) signal
Signal No. Signal nam e
886: CAR-S
Remarks
Carrier protection mode
Distance carrier protection enable
Overreaching element selection
Power swing blocking
6 F 2 S 0 8 5 0
CS
S-TRIP
M-TRIP