31RM48 - MODULAR EARTH LEAKAGE RELAY RM 24-48VAC-

Why Choose the 31RM48?

Designed for dependable ground-fault protection, the Lovato 31RM48 Earth Leakage Relay delivers Type A residual operation for AC and pulsed DC circuits. This modular unit mounts on 35 mm DIN rails (IEC/EN 60715) and operates from a wide 24–48 VAC/DC supply. With a single operating threshold and external toroidal transformer (CT), the 31RM48 simplifies panel integration while maintaining precise leakage monitoring.

Part of the RM series, this earth leakage relay meets IEC/EN 60947-2 and is engineered for long service with a mechanical life of 50,000,000 cycles. It supports secure terminations with 0.5 Nm max tightening torque, operates from -10 to +60 °C, and weighs 190 g. A Sustainability certification is listed by the manufacturer.

Key Benefits

• Type A residual characteristic for AC and pulsed DC fault detection.
• Modular 35 mm DIN rail mounting for fast, tidy panel installation.
• External toroidal transformer allows flexible sensing placement.
• Wide 24–48 VAC/DC supply simplifies control-panel design.
• Single operating threshold enables straightforward setup and control.
• Conforms to IEC/EN 60947-2 for assured compliance.
• Long mechanical life rated to 50,000,000 cycles.
• Lightweight 190 g device reduces cabinet load.

Technical Specification

• Product type designation: RM
• Terminal tightening torque (max): 0.5 Nm
• Mechanical life: 50000000 cycles
• Operating temperature: -10 to +60 °C
• Storage temperature: -20 to +80 °C
• Weight: 190 g

What’s Included

• Lovato 31RM48 earth leakage relay (RM series)
• Product datasheet and installation information (online)

Applications

• Industrial control panels and distribution boards requiring earth leakage protection
• OEM machinery with AC and pulsed DC loads
• Commercial building services panels on 35 mm DIN rails
• Process equipment and motor control centres
• Retrofit upgrades in existing DIN rail cabinets

Safety note: Install and commission only by qualified personnel. Isolate power before wiring, use an appropriate external toroidal transformer, tighten terminals to the specified torque, and operate within the rated voltage and temperature.