ABB RELION REX640 - 5.7.5.6 Recorded data; 5.7.6 Measurement modes

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.
Table 1156 shows which of the recorded data values
are available as continuous monitoring values during a fault.
Table 1156: Cross reference table for recorded and monitored data values
Recorded data Monitored data
Flt loop FAULT_LOOP
Flt distance FLT_DISTANCE
Flt Dist quality FLT_DIST_Q
Flt loop resistance RFLOOP
Flt loop reactance XFLOOP
Flt phase reactance XFPHASE
Flt point resistance RF
Flt to Lod Cur ratio IFLT_PER_ILD
Equivalent load Dis S_CALC
XC0F Calc 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 ( VT connection is set to
“Wye”). Another alternative is to measure phase-to-phase voltages ( VT connection
is set to “Delta”) and residual voltage (Uo). Both alternatives are covered by setting
the configuration parameter Phase voltage Meas to "Accurate".
Protection related functions
1MRS759142 F
1216 REX640
Technical Manual