The settings are stored in non-volatile memory, which means that they remain stored in case
IED is powered off.
8.1.5.1
Setting system frequency
GUID-D5CB4B02-F5EC-4680-8368-E9BDBAA28BD3 v1
Frequency can be set to either 50 or 60 Hz.
1.
Use the Up and Down button to select frequency.
2.
Store the new frequency by pressing the Enter button, or clear the last stored frequency
by pressing the Clear button.
8.1.5.2
Setting stator and rotor injection frequency
GUID-C068C178-8156-49A3-80CB-22E163973986 v1
Frequency can be set as integer in range 50 to 250 Hz for a stator and 75 to 250 Hz for a rotor.
1.
Use the keypad to navigate to stator or rotor frequency (row 2 or 4)
2.
Press E to enter value change state
3.
Use the Up and Down button to select frequency
4.
Store the new frequency by pressing the E (Enter) button, or clear the chosen frequency
by pressing the C (Clear) button
8.1.5.3
Selecting rotor gain
GUID-E25C6226-7005-4121-A651-EAFB8A6973A3 v1
Default (gain factor 3) is the recommended level, where a defined effect of worst case single
fault at exciter circuit is allowed. A higher gain factor (4) may cause saturation in case of single
fault in exciter circuit. A lower gain factor may be needed if the degree of disturbance is high.
Change from default value only if requested by ICT tool during calibration procedure.
Select rotor gain factor according to the table below.
Table 17: Rotor gain
Gain factor
Note
1
Extreme
2
Enhanced
3
Default
4
Reduced
8.1.5.4
Selecting stator gain
GUID-9832871C-6190-4E38-8523-00E322CAA09C v2
Stator gain factor for both voltage and current depends on the highest voltage that may occur
at the injection point of VT or DT. That voltage depends on the VT/DT ratio and the stator
rated primary voltage.
Select gain factor in accordance with highest voltage that may occur at the injection point. See
Technical manual for exact formulas depending on particular injection arrangement.
1MRK 500 127-UEN D
Section 8
REX060 injection unit LHMI
670 series
75
Operation manual
