OpModeI0
: This is used to select the operation
On
or
Off
of the end zone timer
logic using residual overcurrent start to provide a remote backup.
OpModetEnd1
: It is used to select operation
On
or
Off
of the end zone 1.
OpDirEnd1
: This is used to select the direction mode of end zone 1. It can be set to
Non-directional
,
Forward
and
Reverse
. It is recommended to set as
Forward
.
tEnd1
: This is used to set time delay for the first stage remote backup. The setting
should allow the farthest zone to operate. The default setting is 2.5s.
OpModetEnd2
: This is used to select the operation
On
or
Off
of the end zone 2.
OpDirEnd2
: This is used to select the direction mode of the end zone 2. It can be
set to
Non-directional
,
Forward
and
Reverse
. It is recommended to set this as
Non-
directional
.
tEnd2
: This is used to set the time delay for the second stage trip. It should be set in
coordination with the
tEnd1
timer. The default setting is 3.0s.
OpModeGenSt
: This is used to select
On
or
Off
of zone timers start by general start
signal. The default value is
Off
.
ZoneCharSym
: This is used to select measuring zone
Symmetry/Nonsymmetry
around R – X plane and it is set by default to
Symmetry
. With this default value, it
is not possible to set resistive and reactance reaches in reverse direction. However,
if it is needed to specify the reverse reaches depending on the application, it is
recommended to set this parameter to
Nonsymmetry
.
Start
GUID-D2A63BD2-34EA-407C-B43F-165DCB576C4E v2
CharStartZ<
: It is used to select the underimpedance start characteristic (i.e.
Circular
and
Quadrilateral
).
Z1CircleStart
: This is used to set a positive sequence impedance reach in Ohm of
the starting element circular characteristic. It will be set to operate for all faults
within the protected area. Therefore, it should be set beyond the reach of the
farthest zone.
X1Start
: This is to set positive sequence reactance reach in Ohm of starting element
quadrilateral characteristic. It will be set to operate for all faults within the
protected area. Therefore, it should be set beyond the reach of the farthest zone.
RFPEStart
: This is used to set the forward and reverse resistive reach in Ohm for
PE starting element when the quadrilateral characteristic is selected. It will be set to
a value greater than the resistive reach of the farthest zone.
RFPPStart
: This is used to set the forward and reverse resistive reach in Ohm for
PP starting element when the quadrilateral characteristic is selected. It will be set to
a value greater than the resistive reach of the farthest zone. It is not applicable for
compensated and high impedance earthed systems.
Section 7
1MRK 506 375-UEN A
Impedance protection
102
Railway application RER670 2.2 IEC
Application manual
Summary of Contents for RELION RER670
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