Toshiba GR200 Series Instruction Manual page 319

CBF1_START-A
CBF1_START-B
CBF1_START-C
○
1
CBF1-RETRIP-A
CBF1-RETRIP-B
CBF1-RETRIP-C
CBF1-RETRIP
OFF
ON
CBF1-Trip
ON-AftRe
CBF-EN-ON
CBF1-NON_BLOCK
820001EBB6 CBF1-TP_INST
Figure 2.20-3 CBF1 logics (continued from Figure 2.20-2)
Figure 2.20-2 illustrates that CBF trip signals (CBF1-RETRIP) will be issued when
OCCBF1 or EFCBF1 element operates continuously until expiration of timer settings [TCBF1-
RE] and [TCBF1-TP]. Setting [TCBF1-RE] is overridden when On-AftRe is set for scheme
switch [CBF1-TRIP]. When On is set for scheme switch [CBF1-TRIP], timer setting [TCBF1-
RE] is bypassed; [TCBF1-TP] is applied for backup CBF trip.
&
≥1
&
≥1
&
≥1
&
&
&
&
&
- 296 -
TCBF1-TP
8800011B24
t 0
≥1
8900011B25
t 0
≥1
8A00011B26
t 0
≥1
0.000-300.000s
8B00011B27
≥1
&
&
&
≥1
6F2S1914 (0.49)
CBF1_TRIP-A
CBF1_TRIP-B
CBF1_TRIP-C
CBF1_TRIP
To TRC
CBF1_ARC-BLOCK
GRL200 (Soft 033 & 037)