IEC11000045-1-en.vsd
Frequency found by
the function
Voltage and current signal
staus and TRIP indication
Ffunction status field. Errors and
abnormalities are displayed in order
to simplify trouble shooting.
GUID-84947C77-215F-4007-AAC0-9433B8444396 V1 EN-US
Figure 11: ICT signals and function indication panel
9.
When the installing procedure is successful, select the Submit and save in report button.
ICT will now forward a more accurate frequency to
Parameter setting. In the Parameter
setting tool, write the newly acquired parameter to IED.
The accurate setting of this frequency is essential for proper operation of the protection
under different operating conditions.
6.4
Performing calibration
GUID-DE96CE75-A268-4FE1-AD9D-093EA1F2ECBA v3
1.
From the Calibrating tab, select the first sub tab, i.e. Step1: Measurement 1.
2.
Make sure you have not attached any additional impedance in parallel with the rotor.
The generator shall be in a condition that is as close as possible to the normal operating
condition as during the Installation.
3.
From the ICT toolbar, select the Start reading values from IED button.
The ICT performs consecutive measurements until the statistical error reaches an
acceptable value. This is graphically shown in a diagram.
It is very important that calibration steps (step 1, step 2 and step 3) are
performed in the proper order. If not, the calibration might fail. If readings
are not stable during the step, a warning to repeat the step may be
suggested; the step shall be repeated in order to avoid that the
calibration fails.
4.
When the statistical error of the performed continuous measurements reaches an
acceptable value, the indicator bar reaches the stability region (turned green), and it is
allowed to select the Submit button.
Clicking the Submit button the result is stored for later calculations. ICT automatically
shifts to the second calibration sub tab, Step 2: Measurement 2.
Section 6
1MRK 502 067-UEN B
Calibrating injection based sensitive rotor earth fault protection
54
Commissioning manual
