ABB REG670 Commissioning Manual page 89

1MRK 502 073-UUS A
Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062
Commissioning manual
Calibrating injection based 100% stator earth fault protection
GUID-3C378090-E33E-4AAA-8BBE-09FA872D9A87 V1 EN-US
Figure 19: ICT toolbar
3. 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 prior to calibration is that the measured
voltage and current signal on the injected frequency is present/found, and that the
amplitude of these is within the permitted limits.
4. Make sure you have not connected any additional impedance in parallel with the
stator 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.
5. Activate the injection by turning the injection switch to on position on the
injection unit REX060.
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 proper (cables etc.), and selected gains and injection
frequency on the REX060 is properly selected. 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.
Button for
Function selection
enable/disable
dropdown menu
tripping
Section 7
Buttons for start/stop
reading from IED
IEC11000043-1-en.vsd
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