ABB Protect IT REL 501 2.5 Series Operator's Manual page 46

Distance protection terminal
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Calculate the distance to fault
&DOFXODWH WKH GLVWDQFH WR IDXOW
1DYLJDWH WKH PHQXV

2QO\ RQH GLVWXUEDQFH FDQ EH YLHZHG DW WKH WLPH 6HOHFW WKH
RQH WR EH YLHZHG

9LHZ WKH GLVWDQFH WR IDXOW FDOFXODWLRQ PHQX
Navigate the menus to:
'LVWXUE5HSRUW
&DOF'LVW7R)OW
'LVWXUEDQFHQ
Q is the disturbance order of occurrence, Q=1 meaning the most re-
cent and Q=10 the oldest.

6HOHFW D IDXOW ORRS

3UHVV WKH ( EXWWRQ WR FDOFXODWH
The fault loop and distance to fault are displayed.
+RZ WKH GLVWDQFH WR IDXOW LV GLVSOD\HG
The calculated distance to fault is displayed in the following manner either in the dis-
turbance summary or when the distance is manually recalculated:
)OW/RRS /RRS!
'LVW 4XDOLILHU!4XDOLILHU! 'LVWDQFH YDOXH!8QLW!
The first row identifies the fault loop used for calculation.
The second row qualifies the calculated data and shows the distance using the selected
unit, percent (%), kilometers (km) or English miles (mi).
7DEOH 
4XDOLILHU
6\PERO
0HDQLQJ
Blank (no symbol)
The calculated distance was within the set line length.
>
The fault was detected in adjacent lines.
&KDSWHU 
+DQGOH WKH GLVWXUEDQFHV
39

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