ABB RELION Series, Technical Manual

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GUID-59F4E262-44C8-4EF3-A352-E6358C84C791 V2 EN
Figure 261: An example of the ALARM output use
5.4.4.5 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 .
The function has also monitored data values which are used for the read-out of
continuous calculation values. The cross reference table shows which of the recorded
data values are available as continuous monitoring values during a fault.
Table 519: 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
5.4.4.6 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
1MRS758755 A
Section 5
Protection related functions
REC615 and RER615 501
Technical Manual