Hitachi Relion 670 Series Commissioning Manual page 273

1MRK506371-UUS Rev. M
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7. Pull out the faulty module.
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.
14.4 Repair support
If an IED needs to be repaired, the whole IED must be removed and sent to an Hitachi Energy Logistic
Center. Please contact the local Hitachi Energy representative to get more details.
e-mail: sa-t-order@hitachienergy.com
14.5 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.
Line distance protection REL670
Commissioning manual
Remove the IED from the panel if necessary.
Remove the rear plate of the IED.
Remove the front plate.
Remove the screws of the transformer input module, both front and rear.
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Section 14
Troubleshooting
M11768-3 v6
M11769-3 v2
267