ABB RELION REX640 Technical Manual page 1216

Protection related functions
Figure 695: An example of the ALARM output use
5.7.5.6 Recorded data
All the information required for a later fault analysis is recorded to SCEFRFLO
recorded data. In the protection relay, recorded data is found in Monitoring >
Recorded data > Other protection > SCEFRFLO.
SCEFRFLO has also monitored data values which are used for the read-out of
continuous calculation values.
are available as continuous monitoring values during a fault.
Table 1156: Cross reference table for recorded and monitored data values
Recorded data
Flt loop
Flt distance
Flt Dist quality
Flt loop resistance
Flt loop reactance
Flt phase reactance
Flt point resistance
Flt to Lod Cur ratio
Equivalent load Dis
XC0F Calc
5.7.6 Measurement modes
The full operation of SCEFRFLO requires that all three phase-to-earth voltages are
measured. The voltages can be measured with conventional voltage transformers or
voltage dividers connected between the phase and earth (
"Wye"). Another alternative is to measure phase-to-phase voltages (
is set to "Delta") and residual voltage (Uo). Both alternatives are covered by setting
the configuration parameter
1216
Table 1156
shows which of the recorded data values
Monitored data
FAULT_LOOP
FLT_DISTANCE
FLT_DIST_Q
RFLOOP
XFLOOP
XFPHASE
RF
IFLT_PER_ILD
S_CALC
XC0F_CALC
Phase voltage Meas to "Accurate".
1MRS759142 F
VT connection is set to
VT connection
REX640
Technical Manual