Enumerator value Description
26 Zones 2,4 and 5
27 Zones 1,2,4 and 5
28 Zones 3,4 and 5
29 Zones 1,3,4 and 5
30 Zones 2,3,4 and 5
31 Zones 1,2,3,4 and 5
Table 925: Recorded data parameters regarding specific zones
Parameter
Description
Fault/load Dir Znx Direction of fault or load zone Zx
Dir resistance Znx Direction resistance, zone Zx
Dir reactance Znx Direction reactance, zone Zx
Flt loop 1st Ris Znx First PE-Loop resistance, zone Zx
Flt loop 1st Rea Znx First PE-Loop reactance, zone Zx
Flt loop 2nd Ris Znx Second PE-Loop resistance, zone Zx
Flt loop 2nd Rea Znx Second PE-Loop reactance, zone Zx
Flt PP-loop Ris Znx PP-Loop resistance, zone Zx
Flt PP-loop Rea Znx PP-Loop reactance, zone Zx
Phase reactance Znx Phase reactance Znx
In case of a no-fault condition, the direction of the load current seen by a
three-phase fault measuring element (based on positive-sequence signal data) is
indicated. DIR_LOOP_R and DIR_LOOP_X are the loop resistance and reactance from
the impedance calculation used in directional discrimination for zone 1. Depending
on the released fault loops, the calculated fault loop impedance can be read from
the parameters FLTLOOP_RFST, FLTLOOP_XFST, FLTLOOP_RPP and FLTLOOP_XPP. If
two phase-to-earth loops are released simultaneously for measurement, the second
phase-to-earth impedance can be found from the parameters FLTLOOP_RSND
and FLTLOOP_XSND. The corresponding positive-sequence phase-to-earth fault
reactance can be found from parameter FLTPH_X.
The impedances are shown in primary ohms.
Protection functions 1MRS759142 F
982 REX640
Technical Manual
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