ABB Remote I/O RIO600 Installation And Commissioning Manual page 150

Section 6
Commissioning
142
Table 88: Fuse failure output control
Fuse failure detection criterion
Negative-sequence criterion
Current and voltage delta function criterion
External fuse failure detection
It is recommended to always set Enable Seal in to "True". This secures
that the blocked protection functions remain blocked until normal
voltage conditions are restored if the fuse failure has been active for 5
seconds, that is, the fuse failure outputs are deactivated when the
normal voltage conditions are restored.
Signals
Table 89: SEQSPVC Input signals
Name Type
IA SIGNAL
IB SIGNAL
IC SIGNAL
I SIGNAL
2
U_A SIGNAL
U_B SIGNAL
U_C SIGNAL
U2 SIGNAL
FF_CBCLOSED BOOLEAN
FF_DISCONOPEN BOOLEAN
Conditions and function response
If a fuse is detected based on the negative-
sequence criterion, the FUSEF_U output is
activated.
The FUSEF_U output signal is also activated if all
the phase voltages are above the
setting for more than 60 seconds and at the same
time the negative-sequence voltage is above
Seq Voltage Lev for more than 5 seconds, all the
phase currents are below the
setting and the circuit breaker is closed, that is,
FF_CBCLOSED is TRUE.
If the current and voltage delta criterion detects a
fuse failure condition, but all the voltages are not
Seal in Voltage setting, only the
below the
FUSEF_U output is activated.
The FF_DISCONOPEN input signal is supposed to
be connected through a protection relay binary
input to the N.C. auxiliary contact of the line
disconnector. The FF_DISCONOPEN signal sets
the FUSEF_U output signal to block the voltage-
related functions when the line disconnector is in
the open state.
Default Description
0 Phase A current
0 Phase B current
0 Phase C current
0 Negative-sequence
current
0 Phase A voltage
0 Phase B voltage
0 Phase C voltage
0 Negative phase
sequence voltage
0 = False Active when circuit
breaker is closed
0 = False Active when line
disconnector is open
Installation and Commissioning Manual
1MRS757488 H
Seal in Voltage
Neg
Current Dead Lin Val
RIO600