Designed for dependable ground-fault protection, the Lovato 31RM48 Earth Leakage Relay delivers Type A residual operation for AC and pulsed DC circuits.
£438.92
The Lovato 31RM48 is a modular earth leakage relay designed for residual current monitoring and electrical protection applications. Featuring Type A residual current detection, one adjustable operating threshold, and compatibility with 24-48VAC/DC auxiliary supply, this relay provides dependable earth fault monitoring for industrial, commercial, and automation electrical systems. The unit is designed for 35mm DIN rail mounting and requires an external toroidal current transformer.
The Lovato 31RM48 earth leakage relay is part of the Lovato 31RM series of modular residual current monitoring devices. It is designed for installation on IEC/EN 60715 35mm DIN rails and works with an external toroidal transformer to detect earth leakage currents. The relay provides a single adjustable operating threshold, Type A residual current detection, SPDT relay output, and configurable automatic or manual reset functions.
The Lovato 31RM48 is suitable for electrical systems requiring reliable earth leakage monitoring and residual current protection, including:
The Lovato 31RM48 provides a flexible DIN rail mounted solution for residual current protection. Its modular design, external CT compatibility, Type A detection, adjustable trip settings, and 24-48VAC/DC supply compatibility make it suitable for monitoring earth leakage faults and improving electrical safety in demanding applications.
| Specification Value Brand | Lovato Electric |
|---|---|
| Part Number | 31RM48 |
| Product Type | Earth leakage relay |
| Residual Current Type | Type A |
| Mounting | 35mm DIN rail mounting |
| Toroidal Transformer | External |
| Supply Voltage | 24-48VAC/DC |
| Number of Operating Thresholds | 1 |
| Adjustable Leakage Current Range | 0.025A to 250A (with compatible settings and accessories) |
| Output Contact | 1 x SPDT changeover contact |
| Contact Rating | 5A at 250VAC |
| Frequency | 50-60Hz |
| Trip Delay Adjustment | 0.02-5 seconds |
| Power Consumption | Maximum 3VA |
| Protection Rating | IP20 terminals |
| Operating Temperature | -10°C to +60°C |
| Dimensions | 52 x 89 x 72mm |
| Weight | 200g |
| Standards | IEC/EN 60947-2 |
| HS Code | 85389091 |
The Lovato 31RM48 is used to monitor earth leakage currents and provide residual current protection in industrial and commercial electrical systems.
No. The relay requires an external toroidal current transformer for residual current measurement.
The relay operates with a 24-48VAC/DC auxiliary supply.
The Lovato 31RM48 provides Type A residual current detection suitable for AC and pulsating DC fault currents.
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2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...