Auditing
In the auditing part installation, calibration and commissioning reports are stored.
.
6.3
Launching injection commissioning tool (ICT) and
performing the installation
GUID-15CAE2A3-FA17-4119-9188-824C7F309D4B v3
1.
Make sure you have not attached any additional impedance in parallel with the rotor
circuit. All wirings shall be finalized and they shall be the definitive ones. All primary and
secondary devices shall be connected and switched on. All grounding of generator shall
be removed. The generator shall be in a condition that is as close as possible to the
normal operating condition.
2.
Activate the injection by turning the injection switch to on position on the injection unit
REX060.
3.
To launch the Injection commissioning tool (ICT), right-click REG670 in the PCM plant
structure and select the Injection commissioning.
4.
In the ICT toolbar, select the Rotor Earth Fault function.
IEC11000222-1-en.vsd
IEC11000222 V1 EN-US
Figure 10: 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 on the injected frequency is present/found, and that their
amplitude is within the permitted limits.
6.
Write the value of the “Gain” 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 gains 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.
1MRK 502 067-UEN B
Section 6
Calibrating injection based sensitive rotor earth fault protection
53
Commissioning manual
