A criterion based on delta current and delta voltage measurements can be added to the fuse
failure supervision function in order to detect a three phase fuse failure, which in practice is more
associated with voltage transformer switching during station operations.
13.2.3 Function block
M13678-3 v9
FUFSPVC
I3P*
V3P*
BLOCK
52A
MCBOP
89B
BLKTRIP
BLKZ
BLKV
3PH
DLD1PH
DLD3PH
PU_DI
PU_DI_A
PU_DI_B
PU_DI_C
PU_DV
PU_DV_A
PU_DV_B
PU_DV_C
ANSI14000065-1-en.vsd
ANSI14000065 V1 EN-US
Figure 390: FUFSPVC function block
13.2.4 Signals
PID-3492-INPUTSIGNALS v7
Table 427: FUFSPVC Input signals
Name Type Default Description
I3P GROUP
SIGNAL
- Current connection
V3P GROUP
SIGNAL
- Voltage connection
BLOCK BOOLEAN 0 Block of function
52a BOOLEAN 0 Active when circuit breaker is closed
MCBOP BOOLEAN 0 Active when external Miniature Circuit Breaker opens protected
voltage circuit
89b BOOLEAN 0 Active when line disconnect switch is open
BLKTRIP BOOLEAN 0 Blocks operation of function when active
PID-3492-OUTPUTSIGNALS v7
Table 428: FUFSPVC Output signals
Name Type Description
BLKZ BOOLEAN Start of current and voltage controlled function
BLKV BOOLEAN General pickup
3PH BOOLEAN Three-phase pickup
DLD1PH BOOLEAN Dead line condition in at least one phase
DLD3PH BOOLEAN Dead line condition in all three phases
PU_DI BOOLEAN Common pickup signal of sudden change in current
Table continues on next page
1MRK 502 066-UUS B Section 13
Secondary system supervision
731
Technical manual
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