Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
RM148 – MOD EARTH LEAKAGE RELAY 24-48VAC/DC
The Lovato RM148 Earth Leakage Relay delivers dependable protection with a single operating threshold and fixed tripping set point and time.
£171.64
Lovato RM148 Earth Leakage Relay - Modular Residual Current Protection Relay 24-48VAC/DC
The Lovato RM148 is a modular earth leakage relay designed for residual current monitoring and electrical protection applications. Featuring Type A residual current detection, a single fixed operating threshold, fixed tripping time, and compatibility with 24-48VAC/DC auxiliary supply, this relay provides reliable earth fault monitoring for industrial and commercial electrical installations. The unit is designed for 35mm DIN rail mounting and requires an external toroidal current transformer.
Product Overview
The Lovato RM148 earth leakage relay is part of the Lovato RM series of modular residual current monitoring devices. Designed for installation on standard 35mm DIN rails according to IEC/EN 60715, it operates with an external toroidal transformer to detect earth leakage currents. The relay provides one fixed operating threshold, fixed trip delay, SPDT relay output, front TEST button, and configurable automatic or manual reset functions.
Key Features
- Manufacturer: Lovato Electric
- Model / Part Number: RM148
- 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 fixed operating threshold
- Fixed tripping set point and time
- SPDT changeover relay output
- Front TEST button
- Automatic or manual reset by front button
- LED indication for auxiliary voltage and relay trip status
- IEC/EN 60947-2 compliant
Applications
The Lovato RM148 is suitable for electrical systems requiring dependable 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 RM148?
The Lovato RM148 provides a compact DIN rail mounted solution for residual current monitoring where fixed protection settings are preferred. Its Type A detection, external CT compatibility, SPDT output contact, and modular construction make it suitable for improving electrical safety and monitoring earth leakage faults in industrial environments.
Technical Specifications
Tick the specs you need, then view products that match.
| 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, IP40 | |
| Specification Value Brand | Lovato Electric | |
| Part Number | RM148 | |
| Product Type | Earth leakage relay | |
| Residual Current Type | Type A | |
| Mounting Type | 35mm DIN rail mounting | |
| Toroidal Transformer | External | |
| Supply Voltage | 24-48VAC/DC | |
| Operating Thresholds | 1 fixed threshold | |
| Tripping Set Point | 0.3A or 0.5A | |
| Trip Delay | 0.02s or 0.5s | |
| Output Contact | 1 x SPDT changeover contact | |
| Contact Rating | 5A at 250VAC | |
| Frequency | 50-60Hz | |
| Power Consumption | Maximum 3VA | |
| Protection Rating | IP20 terminals / IP40 front | |
| Operating Temperature | -10°C to +60°C | |
| Dimensions | 52 x 89 x 72mm | |
| Weight | 170g | |
| Standards | IEC/EN 60947-2 | |
| HS Code | 85389091 |
Frequently Asked Questions
What is the Lovato RM148 used for?
The Lovato RM148 is used to detect earth leakage currents and provide residual current protection in industrial and commercial electrical systems.
Does the Lovato RM148 include a toroidal transformer?
No. The relay requires an external toroidal current transformer for residual current measurement.
What supply voltage does the Lovato RM148 support?
The relay operates with a 24-48VAC/DC auxiliary supply.
How is the Lovato RM148 mounted?
The Lovato RM148 is designed for modular 35mm DIN rail mounting according to IEC/EN 60715.
