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
Summary of Contents for Relion 670 series
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