ABB REG670 2.0 IEC Commissioning Manual page 82

Section 7
Calibrating injection based 100% stator earth fault protection
76
It is very important that calibration steps 1 to 3 is performed in
the proper order. If not, the calibration might fail.
4. When the bar has reached the stability region (turned green), select the Submit
button.
ICT automatically shifts to the second calibration sub tab, Step2: Calibration
step 2.
GUID-3C7F0567-2367-46E4-9606-FCFC7408DAA0 V1 EN
Figure 22: ICT calibration tab 1 including the stability region indicator bar
5. Attach an 10kΩ known fault (10kΩ resistance to ground).
6. Type 10000 in the real part of the Connected impedance field and leave the
imaginary part field empty.
This informs the ICT that we have attached 10kΩ pure resistive impedance.
7. In the ICT toolbar, select the Start reading from IED button.
8. Once again, wait until the stability criteria is fulfilled, then select the Submit
button.
ICT automatically shifts to the third calibration tab, Step3: Calibration step 3.
9. Remove the known fault resistance attached earlier and apply a short circuit
instead.
10. In the ICT toolbar, select the Start reading from IED button.
11. When the stability criteria are fulfilled, select the Submit button once again.
ICT automatically shifts to the fourth calibration tab, Step4: Save calibration
factors. Here the newly calculated k1, k2 and reference 1 are presented.
12. Check in the Calibration result field that all tests have been passed.
12.1. If a failure is indicated during one or more check(s), follow the
instructions/tips provided by the ICT in the Calibration result field.
12.2. If these tips do not solve the issue, then contact ABB Support.
1MRK502053-UEN B
Stability region
indicator bar
IEC11000047-1-en.vsd
Generator protection REG670 2.0 IEC
Commissioning manual