Toshiba GR200 Series Instruction Manual page 318

Scheme logic
2.20.4
CBF function can issue a trip signal in each phase. The trip signal will be generated where
OCCBF1 or EFCBF1 element is being operated and signals 'GEN.TRIP-*'† are generated
constantly. In other words, the circuit breaker has not been opened successfully with the
GEN.TRIP-* so that the fault has not been cleared yet; therefore, CBF trip command is
required separately.
†Note: The IED issues GEN.TRIP signals in trip circuit function (TRC), which is
discussed in Chapter
When wishing to issue the CBF trip command without the GEN.TRIP-* commands, the
IED can issue it with external signals come from other relay devices. The user should inject
the external signals at PLC connection points 'EXT.CBF1_START*'.
On the other hand, when wishing to issue the CBF trip command without the operation
of OCCBF1 or EFCBF1 element, the IED can also issue it with external signals using PLC
connection points 'SUB.CBF1*'. This technique will be achieved when the user programs to
inject a 'CB close (closed) state signal' at the 'SUB.CBF1*' points. It is useful if the CBF
function cannot determine the conditions of breaker failures, when OCCBF1 or EFCBF1
element fails to detect small fault currents.
8000011C20
OCCBF1 A
&
8100011C21
B
&
8200011C22
C
&
OCCBF-EN
ON
8400011C27
EFCBF1
&
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.CBF1_START-A
8100011BB1
810001EBB1 EXT.CBF1_START-B
8200011BB2
820001EBB2 EXT.CBF1_START-C
8300011BB3
830001EBB3 EXT.CBF1_START
800001EBB4 CBF1 _BLOCK
810001EBB5 CBF1-RE_INST
Relay application: Trip circuit
&
≥1
≥1
&
≥1
&
≥1
≥1
≥1
≥1
≥1
≥1
OFF
ON
&
CBF1-Retrip
ON-T
&
CBF-EN
ON
≥1
Figure 2.20-2 Elements logic in CBF1
- 295 -
.
TCBF1-RE
t 0
&
≥1
t 0
&
≥1
t 0
&
≥1
0.000-300.000s
&
&
&
&
&
&
6F2S1914 (0.49)
CBF1_START-A
CBF1_START-B
CBF1_START-C
CBF1_RETRIP-A
≥1
CBF1_RETRIP-B
≥1
CBF1_RETRIP-C
≥1
≥1 CBF1_RETRIP
8000011B20
CBF1_RETRIP-A
8100011B21
CBF1_RETRIP-B
8200011B22
CBF1_RETRIP-C
8300011B23
CBF1_RETRIP
CBF-EN-ON
CBF1-NON_BLOCK
GRL200 (Soft 033 & 037)
○
1
To TRC