Toshiba GRL100-701B Instruction Manual page 81

The weak infeed trip function can be disabled by the scheme switch [WKIT].
ECHO1_DEF-1
ECHO1_DEF-2
UVL
[WKIT]
(+)
"ON"
PUP
When the signaling channel of DEF POP or DEF UOP is separated from that of distance command
protection, the signal S-DEF2 is used for CS and assigned to a user configurable binary output
relay (see Section 3.2.2.).
DEF BOP scheme logic
Figure 2.4.1.6 shows the scheme logic of the DEF BOP.
TDERC
t 0
DEFR
TDEFC
t 0
DEFF
0 - 300ms
R1-CR-DEF
1
R2-CR-DEF
1
≥1
[TERM]
+
"2TERM"
With the BOP, the signal transmitted is a trip block signal. When the reverse looking DEFR
operates, the logic level of the transmit signal CS becomes 1 and a trip block signal is transmitted.
When the trip block signal is received, R1-CR-DEF and R2-CR-DEF becomes 1.
When the forward looking DEFF operates, it executes tripping on condition that no trip blocking
signal should be received.
The delayed pick-up timer TCHD is provided to allow for the transmission delay of the trip block
signal from the remote terminal. Therefore, the time is set depending on the channel delay time.
TCHD setting = maximum signal transmission delay time(*) + 5ms
(*) includes delay time of binary output and binary input for the blocking signal.
The DEFR is also used for the current reversal logic (for current reversal, see Section 2.3.2.6).
≥ 1
Figure 2.4.1.5 Weak Infeed Trip Logic
TREBK
t 0
0.01 – 10.00s
20ms
&
TCHD
t 0
0 - 50ms
&
&
CS (Carrier send) signal
Signal No. Signal name
886:
887:
R1-CR-DEF: Trip permission signal from the remote terminal 1 in 3 terminal application,
or Trip permission signal from remote terminal in 2 terminal application.
Signal No. Signal name
1856:
1857:
R2-CR-DEF: Trip permission signal from the remote terminal 2 in 3 terminal application.
Signal No. Signal name
1864:
1865:
Figure 2.4.1.6 DEF BOP Scheme Logic
 80 
877
DEFWI_TRIP
&
&
DISWI_TRIP
0 t
≥1
CAR-S for Distance and DEF command protection (CH1)
DECAR－S for DEF command protection (CH2)
Description
CAR.R1-1 Trip carrier signal from remote terminal 1 (CH1)
CAR.R1-2 Trip carrier signal from remote terminal 1 (CH2)
Description
CAR.R2-1 Trip carrier signal from remote terminal 2 (CH1)
CAR.R2-2 Trip carrier signal from remote terminal 2 (CH2)
6 F 2 S 0 8 5 0
875
WI_TRIP
≥ 1
&
CS
TSBCT
0 t
0.00 – 1.00s
M-TRIP
&