ABB REG670 Applications Manual page 332

Section 9
Current protection
326
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 172.
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%.
Generator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062
1MRK 502 071-UEN -
Application manual