Monitoring relay 8 A, NFC, 3-phase, 2CO, multifunctional, 208... 480 V AC RMNF22TB30

Multifunctional 3-phase monitoring relay – comprehensive installation protection

This Schneider Electric Harmony Ten 3-phase control relay is an advanced solution for monitoring power networks. Designed to operate in 208...480 V AC systems, it provides versatile protection against various disturbances and irregularities. Equipped with NFC technology, it enables quick configuration and diagnostics using a dedicated mobile application – eliminating traditional, analog methods. This relay is not only a protective element but also a tool supporting effective energy management and minimizing downtime.

Functions and application

The RMNF22TB30 relay offers a wide range of monitoring functions, including:

• Phase failure: immediate detection of the absence of one or more phases, preventing damage to equipment.
• Phase sequence: control of the correct phase sequence, crucial for the proper operation of motors and other receivers.
• Phase imbalance: detection of uneven loading of individual phases, which can lead to overheating and failure.
• Under and over voltage: protection against voltage fluctuations that can negatively affect the operation of connected devices.
• Under and over voltage control: additional protection against extreme voltage values.

Thanks to adjustable time delays (0.1 s - 300 s), the relay's operation can be adapted to specific application requirements. This is an ideal solution for both installers and end-users looking for a reliable and flexible electrical network monitoring system.

Construction and mounting

The relay, with dimensions of 22.5 mm (width) x 90 mm (height) x 99 mm (depth), is characterized by a solid construction and easy mounting thanks to screw connections. Its housing provides protection against external interference (IP20 terminals, IP40 housing/front panel). Additional protection in the form of a 4-digit password prevents unauthorized changes to settings, which is particularly important in industrial and commercial applications. The availability of LEDs on the front panel facilitates identification of the operating status and location of potential faults – and data analysis via the Harmony NFC App allows for even more precise diagnostics.