Performing Calibration - ABB REG670 Commissioning Manual

Section 7
Calibrating injection based 100% stator earth fault protection
7.4
84
Frequency found by
the function
GUID-84947C77-215F-4007-AAC0-9433B8444396 V1 EN-US
Figure 20: 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.

Performing calibration

1. From the Calibratiing 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
stator. 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.
ICT now performs continuous measurements and after the tenth measurement it
starts to update the graph. Notice that the stability region indicator bar reduces in
size.
It is very important that calibration steps 1 to 3 is 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 repeat 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, Step2: Calibration step 2.
Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062
Voltage and current signal
Ffunction status field. Errors and
staus and TRIP indication
abnormalities are displayed in order
1MRK 502 073-UUS A
to simplify trouble shooting.
IEC11000045-1-en.vsd
GUID-9304B342-8BCF-49E3-8429-E64919DC8EBD v2
Commissioning manual