provided in subsequent sections which zone 3 reach of relay being set, overlaps.
The default setting is 0.7 s.
OpModetPPZ3
: This is used to set the
Off/On
operation of the phase-to-phase timer
of zone 3. The default setting is
Off
.
tPPZ3
: This is used to set the time delay to trip for phase-to-phase faults in zone 3.
It should be set so that it provides discrimination with the operating time of relays
provided in subsequent sections which zone 3 reach of relay being set, overlaps.
The default setting is 0.7 s.
Zone 4
GUID-E42EF947-C601-494A-B561-390BBF616356 v2
OpZ4
: This is used for the
Off/On
operation of zone 4 and it is set to
Off
by default.
This can be used as reverse zone.
DirModeZ4
: This is used to set the zone 4 direction mode. It can be set to
Non-
directional
,
Forward
and
Reverse
.
PhSelModeZ4
: This is used to enable the measuring loops of zone 4. 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.
LEModeZ4
: This is used to operate the load discrimination characteristic of zone 4.
The default setting is
Off
.
LCModeZ4
: This is used to enable/disable the adaptive load compensation mode of
zone 4. 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 4. The
default setting is
Off
.
X1FwZ4
: This is used to set the forward positive sequence reactance reach of zone
4 in Ohm/p. It may be set identical to
X1RvZ4
.
X1RvZ4
: This is used to set the reverse positive sequence impedance reach of zone
4 in Ohm/p. It should be set less than zone 1 reach of distance protection for the
shortest line in the reverse direction.
REoverRLZ4
: This is used to set the earth return compensation factor for resistance
of zone 4. It provides zero sequence compensation for phase-to-earth faults.
XEoverXLZ4
: This is used to set the earth return compensation factor for reactance
of zone 4. It provides zero sequence compensation for phase-to-earth faults.
RFPEFwZ4
: This is used to set the forward fault resistive reach in Ohm/p for the
phase-to-earth faults in zone 4. This may be set identical to
RFPERVZ4
.
RFPERvZ4
: This is used to cover the zone 4 fault resistive reach in Ohm/p for
phase-to-earth faults in reverse direction. It should cover apparent phase-to-earth
bus fault resistance allowing for multiple infeed from other circuits. Therefore, it
should be set identical to zone 3 resistive reach setting.
1MRK 506 375-UEN A
Section 7
Impedance protection
Railway application RER670 2.2 IEC
107
Application manual
Summary of Contents for RELION RER670
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