ABB RER670 - Page 107

The default values given should be validated for each application and adopt the
appropriate setting values.
The parameters for ZRWPDIS are set via the local HMI or PCM600.
Common base IED values for primary current (IBase), primary voltage (UBase
)
and primary power (SBase) are set in a global base values for settings function
GBASVAL.
General settings
GUID-30CF921D-34EE-4F24-B050-C92036619F59 v2
GlobalBaseSel: Selects the global base value group used by the function to define
(IBase), (UBase) and (SBase).
Operation: Sets the protection to On or Off.
System Earthing: It is used to select the type of system earthing (i.e. Compensated,
Solidly and High impedance).
LineAng: This is to used set the distance protection characteristic angle. It should
be set to line angle of the protected transmission line. The default value is 75 deg.
IMinOpPE: It is used to select the minimum operating current for the phase-to-
earth loops. If the minimum current is exceeded, the distance protection calculates
the impedance. The default setting is 10% IB.
IMinOpPP: It is used to select the minimum operating current for the phase-to-
phase loops. If the minimum current is exceeded, the distance protection calculates
the impedance. The default setting is 10% IB.
OpLoadEnch: This setting is used to select the load discrimination characteristic
operation to On or Off. The default value is Off.
RLd: It is used to set the resistive reach within the load impedance of load
discrimination characteristic. This setting can be calculated according to equation:
max
2
min
8.0
P
U
RLd 
IECEQUATION15051 V1 EN-US (Equation 15)
Where,
P
max
is the maximum exporting power
U
min
is the minimum voltage for which P
max
can occur
0.8 is security factor.
Ar
gLd: 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. The default value is set at 30 deg.
1MRK 506 375-UEN A Section 7
Impedance protection
Railway application RER670 2.2 IEC 101
Application manual