The RMNF22TB30 is a 3-phase control relay from the Harmony series that monitors power supply parameters including phase sequence, phase failure, over/undervoltage, over/underfrequency, and asymmetry. It operates on a measurement range of 208 to 480V AC and features two C/O output contacts with a maximum switching current of 8A AC at 250V AC. Configuration is handled via NFC with a compatible mobile device, allowing for adjustable time delays from 0.1 seconds to 1 minute upon fault detection. This DIN rail mountable relay is ideal for protecting sensitive 3-phase equipment in industrial control applications.