6.3 Removing the IED
1. Turn off the power.
2. Detach the plug-in unit from the case.
3. Disconnect the wiring.
4. Loosen the four M5 fixing screws.
GUID-D5C8B9E4-24C0-42A5-8632-997132CEE995 V1 EN
Figure 45: Loosening the M5 screws
5. Detach the case from the panel cut-out.
6.4 Sending protection relay for repair
• In case of product problems, contact the nearest ABB office or representative for
consultation and instructions.
6.5 Exchanging protection relay
• To exchange the protection relay with another identical unit, remove the
protection relay and install the new one.
Section 6 1MRS757641 E
Removing, repairing and exchanging
52 620 series
Installation Manual
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