Signals - ABB RELION REX640 Technical Manual

Section 5
Protection related functions
5.7.8
5.7.9
Table 1052: SCEFRFLO Group settings (Basic)
Parameter
Flt Loc Det mode
Z Max phase load
Ph leakage Ris
Ph capacitive React
R1 line section A
X1 line section A
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1120
The triggering of SCEFRFLO can also be inhibited during the autoreclosing
sequence. This is achieved by connecting the signal ACTIVE from the autoreclosing
function DARREC, which indicates that the autoreclosing sequence is in progress, to
the BLOCK input of SCEFRFLO. Blocking of the SCEFRFLO triggering is indicated
during the autoreclosing sequence when the load compensation or steady-state
asymmetry elimination is based on the delta quantities. This applies to the short circuit
faults when Load Com PP loops is set to "Enabled" or, to earth faults, when EF
algorithm Sel is set to "Load compensation" or "Load modelling".

Signals

Table 1050: SCEFRFLO Input signals
Name
I3P
U3P
URES
BLOCK
TRIGG_REC
TRIGG_XC0F
TRIGG_T
Table 1051: SCEFRFLO Output signals
Name
ALARM
Settings
Values (Range) Unit
2=Non-comp
1=Comp, switched
R
1.0...10000.0 ohm
20...1000000 ohm
10...1000000 ohm
0.000...1000.000 ohm / pu
0.000...1000.000 ohm / pu
Type Default Description
SIGNAL - Three-phase currents
SIGNAL - Three-phase voltages
SIGNAL - Residual voltage
BOOLEAN 0=False Signal for blocking the triggering
BOOLEAN 0=False Distance calculation triggering signal
BOOLEAN 0=False XC0F calculation triggering signal
BOOLEAN 0=False Start calculation sequence for compensation
network
Type Description
BOOLEAN Fault location alarm signal
Step Default
2=Non-comp
0.1 80.0
1 210000
1 7000
0.001 1.000
0.001 1.000
1MRS759142 C
Description
Fault location detection mode
Impedance per phase of max. load,
overcurr./under-imp., PSL
Line PhE leakage resistance in primary
ohms
Line PhE capacitive reactance in primary
ohms
Positive sequence line resistance, line
section A
Positive sequence line reactance, line
section A
Technical Manual
REX640