Lovato RTB080 is a Type B toroidal current transformer with an 80 mm internal aperture for residual current monitoring in compatible earth leakage relay systems.
£287.98
The Lovato RTB080 is a dedicated Type B toroidal current transformer designed for use with compatible earth leakage relays in electrical protection systems. As part of the Lovato RTB toroidal current transformer range, it provides residual current sensing for installations where Type B earth leakage detection is required.
The RTB080 features an internal aperture diameter of 80 mm, allowing phase conductors and the neutral, where present, to pass through the toroid for residual current monitoring. The earth conductor must remain outside the transformer. In Lovato Type B earth leakage relay systems, the RTB080 is intended for applications with residual current thresholds of 100 mA or higher.
With a robust enclosed construction, 602 g weight and compliance with IEC/EN/BS 60947-2, the RTB080 is suitable for industrial electrical panels, distribution systems and machinery requiring dependable earth leakage monitoring. Its 80 mm aperture provides useful clearance for larger cable groups while maintaining compact installation dimensions.
Toroidal current transformers such as the Lovato RTB080 detect residual current by measuring the vector sum of the currents flowing through the conductors passing inside the toroid. Under normal conditions these currents balance, while an imbalance indicates leakage current that can be evaluated by the connected earth leakage relay.
For correct operation, all live conductors of the monitored circuit, including the neutral where present, pass through the RTB080 while the protective earth conductor remains outside. The transformer should be installed close to the associated relay, with its connection wiring kept away from power cables and strong electromagnetic fields to help maintain reliable signal integrity.
| Manufacturer | Lovato Electric |
|---|---|
| Series | RTB |
| Model | RTB080 |
| Product type | Toroidal current transformer |
| Residual operation characteristic | Type B |
| Internal diameter | 3.15 in |
| Recommended residual current threshold | ≥100 mA |
| Overall height | 150 mm |
| Overall width | 160 mm |
| Weight | 602 g |
| ETIM 8.0 classification | EC002048 - Current transformer |
| Compliance | IEC/EN/BS 60947-2 |
| EAN13 | 8013975323861 |
| HS code | 85043121 |
The RTB080 is a Type B toroidal current transformer used with compatible earth leakage relays to monitor residual current in electrical circuits.
The Lovato RTB080 has an internal aperture diameter of 80 mm, equivalent to approximately 3.15 in.
In Lovato Type B earth leakage relay systems, the RTB080 is intended for residual current thresholds of 100 mA or higher.
The monitored phase conductors and neutral, where present, should pass through the toroid, while the protective earth conductor must remain outside.
The RTB080 is specified in accordance with IEC/EN/BS 60947-2.
Lovato Electric RTB toroidal current transformers provide dependable residual current sensing for Type B earth leakage protection systems used in industrial distribution, machinery and professional electrical installations.
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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...