The Lovato RM148 Earth Leakage Relay delivers dependable protection with a single operating threshold and fixed tripping set point and time. Designed for modular 35 mm DIN (IEC/EN60715) rail mounting, it works with an external toroidal transformer (CT) and Type A residual operation characteristic. Wide 24-48 VAC/DC supply compatibility simplifies panel design while the RM1 product designation ensures easy cross-reference within the Lovato range. Built for demanding environments, this relay conforms to IEC/EN 60947-2 and is engineered for long service with a mechanical life of 50,000,000 cycles. Clear terminal access with 0.5 Nm maximum tightening torque supports secure wiring, and an operating temperature from −10 to + 60 °C enhances versatility across control panels and distribution boards in industrial, commercial and OEM applications.
£286.07
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.
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.
| 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 |
The Lovato RM148 is suitable for electrical systems requiring dependable earth leakage monitoring and residual current protection, including:
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.
The Lovato RM148 is used to detect 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 RM148 is designed for modular 35mm DIN rail mounting according to IEC/EN 60715.
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|---|
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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...
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...