ABB RELION RET670, Commissioning Manual, Page: 316 / 328

8. Check that the new module has a correct identity number.
9. Check that the springs on the card rail are connected to the corresponding metallic
area on the circuit board when the new module is inserted.
10. Reassemble the IED.
If the IED has been calibrated with the system inputs, the calibration procedure must be
performed again to maintain the total system accuracy.
15.4 Repair support
If an IED needs to be repaired, the whole IED must be removed and sent to an ABB
Logistic Center. Please contact the local ABB representative to get more details.
15.5 Maintenance
The IED is self-supervised. No special maintenance is required.
Instructions from the power network company and other maintenance directives valid for
maintenance of the power system must be followed.
Section 15
1MRK 504 165-UUS -
Troubleshooting
310 Transformer protection RET670 2.2 ANSI
Commissioning manual