The RX232 Earth Fault Relay by Mikro is a reliable and advanced protection system for electrical systems. It features NFC communication for parameter settings and monitoring via the MikroNFC app on Android and iOS. The relay supports two-stage earth fault settings with selectable time delays and protections, recording up to 120 events and 30 faults with timestamp logs. It provides both fundamental and true RMS measurements, with selectable frequencies and a circuit breaker failure protection feature. The relay also offers flexible output contacts for system alarms and abnormalities, with an Internal Relay Failure (IRF) alarm. It adheres to IEC 60255 standards and has robust operational tolerances and IP54 and IP20 enclosure protection ratings.