UBase
: Sets the base voltage in kV. This is 110.0kV.
Operation
: Sets the protection to
On/Off
. Set this to
On
.
System Earthing
: It is used to select the type of system earthing. Select the
Compensated
.
LineAng
: Set it to 50 deg.
IMinOpPE
: It is used to select the minimum operating current for the phase-to-
earth loops. Set this to 10%
IB
.
IMinOpPP
: It is used to select the minimum operating current for the phase-to-
phase loops. Set this to 10%
IB
.
OpLoadEnch
: This setting is used to select the load discrimination characteristic.
Set this to
On
.
RLd
: It is used to set the resistive reach within the load impedance of load
discrimination characteristic.
RLd
can be calculated according to equation:
max
2
min
8
.
0
P
U
RLd
IECEQUATION15051 V1 EN-US
(Equation 25)
Where,
P
max
is the maximum exporting power = 2.5 times the rated power of 50MVA.
U
min
is the minimum voltage which can be taken as 90% of 110.0kV which is
equal to 99kV.
0.8 is security factor.
Therefore
RLd
= 0.8 (99.0)
2
/2.5 x 50.0 = 62.7 Ohm.
ArgLd
: This is used to set the load angle determining the load impedance area of
the load discrimination characteristic. Set the parameter to the maximum possible
load angle at maximum possible load. Set this to 30 deg.
OpModetEnd1
: It is used to select the
On/Off
operation of the first stage timer
tEnd1
. Set this to
On
.
OpDirEnd1
: This is used to select the direction mode of end zone 1. Set this to
Forward
.
tEnd1
: This is used to set time delay for the first stage remote backup. Set this
higher than zone 3 time delay of 0.7s plus additional delays provided. Set this to
the default 2.5s.
OpModetEnd2
: This is used to select the operation
On/Off
of the second stage
timer
tEnd2
. Set this to
On
.
Section 7
1MRK 506 375-UEN A
Impedance protection
144
Railway application RER670 2.2 IEC
Application manual
Summary of Contents for RELION RER670
Page 1: ...RELION 670 SERIES Railway application RER670 Version 2 2 IEC Application manual ...
Page 2: ......
Page 22: ...16 ...
Page 48: ...42 ...
Page 70: ...64 ...
Page 80: ...74 ...
Page 100: ...94 ...
Page 210: ...204 ...
Page 364: ...358 ...
Page 384: ...378 ...
Page 468: ...462 ...
Page 494: ...488 ...
Page 504: ...498 ...
Page 505: ...499 ...