ABB IEPAS01 infi90 power module
The relay module features a circuit breakerfailure protection (CBFP) unit. The CBFP unit
generates a trip signal via TS1 after a set operate
time 0.1...1 s, following the main trip signal
TS2, if the fault has not been cleared before the
set operate time has elapsed. The output contact
of the CBFP unit is normally used for tripping
an upstream circuit breaker. The CBFP unit can
also be used for tripping via redundant trip
circuits of the same circuit breaker, if the circuit
breaker is provided with two trip coils. The
circuit breaker failure protection unit is alerted/
set out of operation with switch SGF1/4.
The relay can be given two sets of setting values,
the main settings and the second settings. Switch ing between main settings and second settings
can be done in three different ways, i) with a
command V150 via the serial port, ii) with a
command via the external control input BS or
manually by changing a parameter in submenu
4 of register A.

Fig. 3. Block diagram for the combined overcurrent and earth-fault relay module SPCJ 4D29.
IL1, IL2, IL3 Energizing currents
I0 Residual current
BS External control signal
SGF1…2 Selector switchgroup SGF for operational relay functions
SGB Selector switchgroup SGB for special relay functions
SGR1...3 Selector switchgroups SGR for configuration of output relays
TS1 Start signal 1 or auxiliary trip signal configured with switchgroup SGR3
SS1 Start signal configured with switchgroup SGR1
SS2 Trip signal 1 configured with switchgroup SGR2
SS3 Trip signal 2 configured with switchgroup SGR2
TS2 Trip signal configured with switchgroup SGR1
AR1, AR2, AR3 Start signals to possible external optional auto-reclose relays
TRIP Red operation (trip) indicator
Note!
All input and output signals of the relay module
are not necessarily wired to the terminals of a
particular relay. The signals wired to the termi nals of a particular protection relay are shown in
the signal diagram in the general part of the relay
manual.
Indicator for the start current of the I> stage
Indicator for the operate time t> or time multiplier k
of the I> stage
Indicator for the start current of the I>> stage
Indicator for the operate time of the I>> stage
Indicator for the start current of the I0> stage
Indicator for the operate time t0> or time multiplier k0
of the I0> stage
Indicator for the start current of the I0>> stage
Indicator for the operate time of the I0>> stage
Indicator for the checksum of switchgroups SGF1…2
Indicator for the checksum of switchgroup SGB
Indicator for the checksum of switchgroups SGR1...3