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8000011C20
OCCBF
A
&
8100011C21
B
&
8200011C22
C
&
OCCBF-EN
ON
8400011C27
EFCBF
&
EFCBF-EN
ON
8000001BB8
800000EBB8
SUB.CBF1-A
8100001BB9
810000EBB9
SUB.CBF1-B
8200001BBA
820000EBBA
SUB.CBF1-C
8300001BBB
830000EBBB
SUB.CBF1
From
GEN.TRIP-A
TRC
TRC
GEN.TRIP-B
GEN.TRIP-C
8000011BB0
800001EBB0 EXT.CBF_START-A
8100011BB1
810001EBB1 EXT.CBF_START-B
8200011BB2
820001EBB2 EXT.CBF_START-C
8300011BB3
830001EBB3 EXT.CBF_START
800001EBB4 CBF _BLOCK
810001EBB5 CBF-RE_INST
CBF_START-A
CBF_START-B
CBF_START-C
○
1
CBF-RETRIP-A
CBF-RETRIP-B
CBF-RETRIP-C
CBF-RETRIP
CBF-Trip
CBF-EN-ON
CBF1-NON_BLOCK
820001EBB6 CBF-TP_INST
Figure 2.12-3 CBF logics (continued from Figure 2.12-2)
Figure 2.12-2 illustrates that CBF trip signals (CBF-RETRIP) will be issued when OCCBF or
EFCBF element operates continuously until expiration of timer settings [TCBF-RE] and
[TCBF-TP]. Setting [TCBF-RE] is overridden when On-AftRe is set for scheme switch [CBF-
TRIP]. When On is set for scheme switch [CBF-TRIP], timer setting [TCBF-RE] is bypassed;
[TCBF-TP] is applied for backup CBF trip.
&
≥1
≥1
&
≥1
&
≥1
≥1
≥1
≥1
≥1
≥1
OFF
ON
CBF-Retrip
&
ON-T
&
CBF-EN
ON
≥1
Figure 2.12-2 Elements logic in CBF
&
≥1
&
≥1
&
≥1
&
&
&
OFF
&
ON
ON-AftRe
&
- 138 -
TCBF-RE
t 0
&
≥1
t 0
&
≥1
t 0
&
≥1
0.000-300.000s
&
&
&
&
&
&
TCBF-TP
t 0
≥1
t 0
≥1
t 0
≥1
0.000-300.000s
≥1
&
&
&
6F2T0207 (0.01)
CBF_START-A
CBF_START-B
CBF_START-C
CBF_RETRIP-A
≥1
CBF_RETRIP-B
≥1
CBF_RETRIP-C
≥1
≥1
CBF_RETRIP
8000011B20
CBF_RETRIP-A
8100011B21
CBF_RETRIP-B
8200011B22
CBF_RETRIP-C
8300011B23
CBF_RETRIP
CBF-EN-ON
CBF-NON_BLOCK
8800011B24
CBF_TRIP-A
8900011B25
CBF_TRIP-B
8A00011B26
CBF_TRIP-C
8B00011B27
CBF_TRIP
To TRC
CBF_ARC-BLOCK
≥1
GRE200 (5,6)
○
1
To TRC
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