2.17 Fault locator
297
7SA522 Manual
C53000-G1176-C155-3
If the parallel line compensation is used, set address 3DUDO/LQH&RPS to <(6
(presetting for devices with parallel line compensation). Further prerequisites are that
• the earth current of the parallel line has been connected to the fourth current input
I
4
with the correct polarity and
• the current transformer ratio ,,SK&7 (address ) in the Power System Data
1 has been set correctly (refer also to Subsection 2.1.3.1 at “Current Transformer
Connection”) and
• the parameter for the fourth current input ,WUDQVIRUPHU has been set to ,Q
SDUDOOLQH (address ) in the Power System Data 1 (Subsection 2.1.3.1 at
“Current Transformer Connection”) and
• the mutual impedances 505/3DUDO/LQH and ;0;/3DUDO/LQH (addresses
and ) have been set correctly in the general protection data (Power
System Data 2, Sub-section 2.1.5.1).
If load compensation is applied to single-phase faults in double-fed lines of an earthed
system, set in address /RDG&RPSHQVDW <(6. In case high fault resistances
are expected for single-phase faults, e.g. at overhead lines without overhead earth
wire or unfavourable footing of the towers, this will improve the accuracy of the dis-
tance calculation.
2.17.3 Settings
2.17.4 Information List
Addr. Parameter Setting Options Default Setting Comments
3802 START Pickup
TRIP
Pickup Start fault locator with
3805 Paral.Line Comp NO
YES
YES Mutual coupling parall.line com-
pensation
3806 Load Compensat. NO
YES
NO Load Compensation
No. Information Type of In-
formation
Comments
1114 Rpri = OUT Flt Locator: primary RESISTANCE
1115 Xpri = OUT Flt Locator: primary REACTANCE
1117 Rsec = OUT Flt Locator: secondary RESISTANCE
1118 Xsec = OUT Flt Locator: secondary REACTANCE
1119 dist = OUT Flt Locator: Distance to fault
1120 d[%] = OUT Flt Locator: Distance [%] to fault
1122 dist = OUT Flt Locator: Distance to fault
1123 FL Loop L1E OUT_Ev Fault Locator Loop L1E
1124 FL Loop L2E OUT_Ev Fault Locator Loop L2E
1125 FL Loop L3E OUT_Ev Fault Locator Loop L3E
1126 FL Loop L1L2 OUT_Ev Fault Locator Loop L1L2
1127 FL Loop L2L3 OUT_Ev Fault Locator Loop L2L3
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