Function selection
dropdown menu
Button for
enable/disable
tripping
Buttons for start/stop
reading from IED
IEC11000043-1-en.vsd
GUID-3C378090-E33E-4AAA-8BBE-09FA872D9A87 V1 EN-US
Figure 20: ICT toolbar
5.
Select the Installing tab if it was not already selected by default after the ICT was
launched.
The first thing that needs to be ensured before the calibration is that the measured
voltage and current signal at the injected frequency is present/found, and that their
amplitude is within the permitted limits.
6.
Write the value “UMaxEF” according to the setting in REX060. Select the Start reading
values from IED button from the ICT toolbar to start performing continuous
measurements.
7.
Verify that the bars/voltage levels for both the voltage and current on the injected
frequency have acceptable level.
The bars must be green and the function status field must also indicate OK.
8.
Check that the actual injected frequency is close enough to the injection frequency set on
the injection unit (REX060).
If the voltage and/or current level(s)/frequencies are not reasonable, or the ICT indicates
other warnings/abnormalities in the function status field, verify that the HW connections
are correct (cables etc.), and selected UMaxEF and injection frequency on the REX060 are
properly set. Then repeat steps 3 to 6. Note that the
FreqInjected setting in Parameter
setting for the specific function must correspond with the chosen injection frequency on
the REX060 HMI for that function.
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 21: 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.
7.4
Performing calibration
GUID-9304B342-8BCF-49E3-8429-E64919DC8EBD v4
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 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.
Section 7
1MRK 502 067-UEN B
Calibrating injection based 100% stator earth fault protection
66
Commissioning manual
