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1MRK 506 369-UEN B
9.4.3.1
Line distance protection REL670 2.2 IEC
Application manual
The parameters for the four step residual overcurrent protection are set via the local
HMI or PCM600. The following settings can be done for the function.
Common base IED values for the primary current (IBase), primary voltage (UBase)
and primary power (SBase) are set in global base values for settings function
GBASVAL.
GlobalBaseSel: Selects the global base value group used by the function to define
IBase, UBase and SBase as applicable.
SeqTypeUPol: This is used to select the type of voltage polarising quantity i.e. Zero
seq or Neg seq for direction detection.
SeqTypeIPol: This is used to select the type of current polarising quantity i.e. Zero
seq or Neg seq for direction detection.
SeqTypeIDir: This is used to select the type of operating current quantity i.e. Zero
seq or Neg seq for direction detection.
Common settings for all steps
AngleRCA: Relay characteristic angle given in degree. This angle is defined as
shown in Figure 261. The angle is defined positive when the residual current lags
the reference voltage (Upol = 3U
RCA
IN>Dir
IEC05000135 V5 EN-US
Figure 261:
Relay characteristic angle given in degree
In a normal transmission network a normal value of RCA is about 65°. The setting
range is -180° to +180°.
or U
)
0
2
Upol = -3U
Operation
IEC05000135-5-en.vsdx
Section 9
Current protection
M15282-81 v10
or
-3U
0
2
477
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