Schneider Electric RMNF22TB30 Harmony NFC 3-Phase Control Relay 8A 2CO 208-480V AC 3-Phase Control Relay

The Schneider Electric RMNF22TB30 is an NFC-enabled Harmony 3-phase control relay that monitors a 208-480 V AC (or 120-277 V AC phase-to-neutral) supply for phase loss, phase sequence, asymmetry, over/undervoltage and over/underfrequency. It switches two 8 A changeover contacts, configured via the EcoStruxure Industrial Device app over NFC, in a 22.5 mm wide DIN rail housing.

Technical Specifications

Certifications & Standards

• CE
• UL
• CSA
• CCC
• EAC
• RCM
• UKCA
• EN/IEC 60255-1

Selection Notes

RMNF22TB30 combines seven monitoring functions - phase loss, sequence, asymmetry, over/undervoltage and over/underfrequency - into one NFC-configurable relay, replacing what would otherwise need separate RM10T, RM22UA and RM35HZ parts in the Harmony lineup. Alarms can be combined with AND, OR and NOT logic across the two independently configurable 8 A outputs, and the 4-digit password lock prevents unauthorised setting changes on panels serviced by multiple technicians. Specify it where a single spare part must cover several monitoring roles rather than stocking individual single-function relays. Reliability data rates the relay at an MTTF of 128.5 years and it tolerates supply microbreaks as short as 10 ms without a nuisance trip, figures worth checking against the duty cycle of the circuit it protects before relying on the relay as the sole supply-fault interlock.