Common Settings For All Steps - ABB REC670 Applications Manual

1MRK 511 401-UEN A
8.4.3.1
Bay control REC670 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 primary current (IBase), primary voltage (UBase)
and primary power (SBase) are set in the global base values for settings function
GBASVAL.
GlobalBaseSel: This is used to select GBASVAL function for reference of base
values.
SeqTypeUPol: This is used to select the type of voltage polarising quantity i.e. Zero
seq and Neg seq for direction detection.
SeqTypeIPol: This is used to select the type of current polarising quantity i.e. Zero
seq and Neg seq for direction detection.
SeqTypeIDir: This is used to select the type of operating current quantity i.e. Zero
seq and 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 67. The angle is defined positive when the residual current lags
the reference voltage (Upol = 3U
RCA
IN>Dir
IEC05000135 V5 EN-US
Figure 67: 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 8
Current protection
M15282-81 v10
or -3U
0 2
163