ABB REC670 Applications Manual page 154

Section 8
Current protection
148
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.
MeasType: Selection of discrete Fourier filtered (DFT) or true RMS filtered (RMS)
signals. RMS is used when the harmonic contents are to be considered, for example
in applications with shunt capacitors.
Operation: The protection can be set to On or Off.
AngleRCA: Protection characteristic angle set in degrees. If the angle of the fault
loop current has the angle RCA, the direction to the fault is forward.
AngleROA: Angle value, given in degrees, to define the angle sector of the
directional function, shown in Figure 59.
StartPhSel: Number of phases, with high current, required for operation. The
setting possibilities are: 1 out of 3, 2 out of 3 and 3 out of 3. The default setting is 1
out of 3.
IMinOpPhSel: Minimum current setting level for releasing the directional start
signals in % of IB. This setting should be less than the lowest step setting. The
default setting is 7% of IB.
2ndHarmStab: Operate level of 2nd harmonic current restrain set in % of the
fundamental current. The setting range is 5 - 100% in steps of 1%. The default
setting is 20%.
1MRK 511 401-UEN A
Bay control REC670 2.2 IEC
Application manual