What to do if ABB Relays have persistent runtime errors?
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Janice HowardJul 28, 2025
If you're encountering persistent runtime errors with your ABB Relays, try rebooting the protection relay first. Then, recheck the supervision events to see if the fault has cleared. However, if the faults persist, you should contact ABB for corrective actions.
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Robin RiveraAug 11, 2025
How to troubleshoot a faulty hardware module in ABB Relays?
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Caitlin FlynnAug 11, 2025
If you suspect a faulty hardware module in your ABB Relays, begin by checking the specific module that's showing an error. Then, review the relay supervision events in Relay Status to pinpoint any faulty hardware modules. Perform a visual inspection of the protection relay. Determine if the error is external or internal. Remove the wiring from the protection relay and test the input and output operation with an external test device. If the problem remains after these steps, or if you observe obvious physical damage, contact ABB for repair or replacement.
ABB RELION REX640 Specifications
General
Model
RELION REX640
Category
Protection Device
Communication Protocols
IEC 61850, Modbus, DNP3, IEC 60870-5-103
Display
LCD
Rated Voltage
100-240 V AC/DC
Rated Frequency
50/60 Hz
Protection Functions
Overcurrent, Earth Fault, Overvoltage, Undervoltage, Frequency