Toshiba GRZ100 B Series, Instruction Manual, Page: 64 / 447

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63
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6 F 2 S 0 8 4 6
CS (Carrier send) signal
Signal No. Signal name
225: EXT_CAR-S for Distance and DEF command
protection (CH1)
338: EXT_DEFCAR
－
S for DEF command
protection (CH2)
R1-CR-DEF: Trip permission signal from the remote terminal.
Signal No. Signal name Description
1568: EXT_CAR.R1-1 Trip carrier signal from
remote terminal
1569: EXT_CAR.R1-2 Guard/And carrier signal
from remote terminal
"ON"
&
&
≥
1
200ms
(+)
t 0
Z3
Z2
Z4
T2
T1
250ms
0 t
50ms
0 t
[ZONESEL]
"Z3"
"Z2" [ECHO]
1
CB-OR
≥
1
R1-CR-DEF(POP)
&
TECCB
0.00 - 200.00s
t 0
DEFFCR
DEFRY
1
R1-CR-DEF(UOP)
(UOP)
(POP)
CS
CS 1
&
&
ECHO1_DEF-R1
1
ECHO_BLOCK 1840
Figure 2.4.4.4 Echo Function in DEF POP and DEF UOP Scheme Logic
Figure 2.4.4.5 shows the scheme logic of the weak infeed trip function. Weak infeed tripping is
executed on condition that a trip permission signal has been received (ECHO1_DEF-R1=1) for
the POP, the undervoltage element UVL (UVLS or UVLG) operates.
The undervoltage element responds to three phase-to-phase voltages and three phase-to-ground
voltages. The undervoltage element prevents false weak infeed tripping due to spurious operation
of the channel.
Single-phase tripping or three-phase tripping is also applicable to weak infeed tripping according
to the reclosing mode of the autoreclose function.
The weak infeed trip function can be disabled by the scheme switch [WKIT] and the PLC signal
WKIT_BLOCK.
DEFWI_TRIP
&
[WKIT]
"ON"
(+)
UVL
ECHO1_DEF-R1
&
778, 779, 780
WKIT_BLOCK 1841
1
Figure 2.4.4.5 Weak Infeed Trip Logic
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 2.4.4.6 shows the scheme logic of the DEF BOP.
&
&
≥
1
0 - 50ms
TDEFR
TCHD
0 - 300ms
20ms
t 0
CS
DEFF
DEFR
t 0
t 0
M-TRIP
&
&
t 0
TDEFF
R1-CR-DEF
1
TSBCT
0.00 – 1.00s
0 t
0.01 – 10.00s
0 t
TREBK
Figure 2.4.4.6 DEF BOP Scheme Logic