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31RM48 – MODULAR EARTH LEAKAGE RELAY RM 24-48VAC-
Designed for dependable ground-fault protection, the Lovato 31RM48 Earth Leakage Relay delivers Type A residual operation for AC and pulsed DC circuits.
£263.35
Lovato 31RM48 Earth Leakage Relay - Modular Residual Current Protection Relay 24-48VAC/DC
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.
Product Overview
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.
Key Features
- Manufacturer: Lovato Electric
- Model / Part Number: 31RM48
- Product Type: Earth leakage relay / residual current monitoring relay
- Residual Current Characteristic: Type A
- Supply Voltage: 24-48VAC/DC
- 35mm DIN rail mounting according to IEC/EN 60715
- External toroidal transformer connection
- Single adjustable operating threshold
- SPDT changeover relay output
- Front TEST button
- Automatic or manual reset configuration
- Green LED auxiliary supply indication
- Red LED trip indication
- IEC/EN 60947-2 compliant
Applications
The Lovato 31RM48 is suitable for electrical systems requiring reliable earth leakage monitoring and residual current protection, including:
- Industrial control panels
- Electrical distribution boards
- Motor control centres
- Automation systems
- Machine protection applications
- Commercial electrical installations
Why Choose Lovato 31RM48?
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.
Technical Specifications
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| Mounting Type | DIN rail | |
|---|---|---|
| Monitoring Function | Earth leakage / residual current | |
| Time Delay | Fixed | |
| Switching Current (A) | 5 A | |
| Coil / Supply Voltage | 24 V AC, 24 V DC, 48 V AC, 48 V DC | |
| IP Rating | IP20 | |
| 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 |
Frequently Asked Questions
What is the Lovato 31RM48 used for?
The Lovato 31RM48 is used to monitor earth leakage currents and provide residual current protection in industrial and commercial electrical systems.
Does the Lovato 31RM48 include a toroidal transformer?
No. The relay requires an external toroidal current transformer for residual current measurement.
What supply voltage does the Lovato 31RM48 support?
The relay operates with a 24-48VAC/DC auxiliary supply.
What type of residual current detection does the Lovato 31RM48 provide?
The Lovato 31RM48 provides Type A residual current detection suitable for AC and pulsating DC fault currents.
