XEoverXLZ5: This is used to set the earth return compensation factor for reactance
of zone 5. It provides zero sequence compensation for phase-to-earth faults.
RFPEFwZ5: This is used to set the forward fault resistive reach in Ohm/p for the
phase-to-earth faults in zone 5. This may be set identical to zone 1 setting. In case
of permissive overreach schemes used for short lines, this has to be set higher than
zone 1 resistive reach.
RFPERvZ5: This is used to cover the zone 5 fault resistive reach in Ohm/p for
phase-to-earth faults in reverse direction. It may be set identical to zone 1 setting.
RFPPFwZ5: This is used to set the forward fault resistive reach in Ohm/p for
phase-to-phase faults in zone 5. It may be set identical to zone 1 setting.
RFPPRvZ5: This is used to cover the zone 5 fault resistive reach in Ohm/p for
phase-to-phase faults in reverse direction. It may be set identical to zone 1 setting.
TimerSelZ5
: This is used to set the zone timer selection mode of zone 5. i.e. Timers
separated, Timers linked, General start, PhSel start, Internal start and External
start. The default setting is Timers separated.
OpModetPEZ5: This is used to set the Off/On operation of the phase-to-earth timer
of zone 5. The default setting is Off.
tPEZ5: This is used to set the time delay to trip for phase-to-earth faults in zone 5.
It should be set identical to zone 2/zone 3 timer setting.
OpModetPPZ5: This is used to set the Off/On operation of the phase-to-phase timer
of zone 5. The default setting is Off.
tPPZ5: This is used to set the time delay to trip for phase-to-phase faults in zone 5.
It should be set identical to zone 2/zone 3 timer setting.
zone 6
GUID-3145A2F9-164D-4035-B1F6-EE67CDA492CE v2
OpZ6: This is used for the Off/On operation of zone 6 and it is set to Off by default.
This zone can be used to provide switch on to fault protection.
DirModeZ6: This is used to set the zone 6 direction mode. It can be set to Non-
directional, Forward and Reverse. The default setting is Forward direction mode.
PhSelModeZ6: This is used to enable the measuring loops of zone 6. It can be set to
Phsel logic, Release L1E, ReleaseL2E, Release PE, Release L1L2 and Release
PE&PP modes. The default setting is Phsel logic mode.
LEModeZ6: This is used to operate the load discrimination characteristic of zone 6.
The default setting is Off.
LCModeZ6: This is used to Off/On the adaptive load compensation mode of zone 6.
It avoids overreaching of the zone in to the next section in case of resistive fault
due to remote end feed. Generally, this setting is not needed for zone 6. The default
setting is Off.
1MRK 506 375-UEN A Section 7
Impedance protection
Railway application RER670 2.2 IEC 109
Application manual
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