ABB REG670 Applications Manual page 408

Section 9
Current protection
402
Table 45: 100MVA machine application when LV side 1000/5 CT is used
Parameter name Selected value
MeasurCurrent
IBase
CT_Location
UrLV
UrHV
PhAngleShift
Note that last three parameters from the table above have no direct influence on
function operation (that is, LV side CT is used) but are anyhow set to the correct
values.
Table 46: 315MVA machine application when HV side 100/5 CT is used
Parameter name Selected value
MeasurCurrent
IBase
CT_Location
UrLV
UrHV
PhAngleShift
Note that last three parameters from the table above must be properly set in order to
have proper operation of the rotor overload function.
The rest of the parameters can be set with the default values, if the generator is
fabricated according to IEEE-C50.13. The parameters have to be changed according
to the specifications, if different standards are applicable.
The parameters for the Generator rotor overload protection GRPTTR are set via the
local HMI or PCM600.
Generator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062
Comment
DC In order to measure directly rotor
810 Rated current of the field winding (i.e.
field current required to produce rated
LV_winding LV side 1000/5 CT used for
400.0 Rated LV side AC voltage (in Volts)
18.00 Rated HV side AC voltage in kV
150 5*30= 150 degree, this provides 150
degrees clock-wise phase angle shift
across the excitation transformer
Comment
DC In order to measure directly rotor
1520 Rated current of the field winding (i.e.
field current required to produce rated
HV_winding
550.0 Rated LV side AC voltage (in Volts)
11.00 Rated HV side AC voltage in kV
-30 11*30-360=-30 degree, this provides 30
degrees anti-clock-wise phase angle
shift across the excitation transformer
1MRK 502 071-UEN -
winding DC current
output from the stator)
measurement
winding DC current
output from the stator)
HV side 100/5 CT used for
measurement
Application manual