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RTB110 Lovato TOROID CT EARTH LEAK. RELAY TYPE B 110MM
Lovato RTB110 is a Type B toroidal current transformer with a 110 mm internal aperture for residual current monitoring in compatible earth leakage relay systems.
£225.38
Why Choose the Lovato RTB110 Type B Toroidal Current Transformer?
The Lovato RTB110 is a robust Type B toroidal current transformer designed for use with compatible Lovato earth leakage relays in residual current monitoring systems. As part of the Lovato RTB toroidal current transformer range, it provides reliable sensing for installations where Type B earth leakage detection is required.
The RTB110 features a large 110 mm internal aperture, allowing multiple phase conductors and the neutral, where present, to pass through the toroid for residual current measurement. The protective earth conductor must remain outside the transformer. In compatible Lovato Type B earth leakage relay systems, the RTB110 is intended for residual current thresholds of 100 mA or higher.
With overall dimensions of approximately 150 × 160 × 110 mm and a weight of 680 g, the RTB110 is well suited to industrial electrical panels and power distribution systems with larger cable groups. Compliance with IEC/EN/BS 60947-2 supports dependable integration into professional earth leakage protection installations.
Key Advantages
- Dedicated Type B toroidal current transformer for earth leakage monitoring.
- 110 mm internal aperture accommodates larger conductor groups.
- Designed for use with compatible Lovato Type B earth leakage relays.
- Suitable for residual current thresholds of 100 mA and above.
- Non-invasive residual current sensing around phase and neutral conductors.
- Complies with IEC/EN/BS 60947-2 for professional electrical protection applications.
Key Features
- Lovato RTB Type B toroidal current transformer series.
- Type B residual operation characteristic.
- 110 mm internal toroid diameter.
- Suitable for compatible external earth leakage relay systems.
- Designed for monitoring phase conductors and neutral passing through the toroid.
- Protective earth conductor remains outside the current transformer.
- Recommended for Type B residual current thresholds from 100 mA.
- Suitable for industrial distribution boards and electrical control panels.
Reliable Residual Current Monitoring for Type B Protection Systems
Toroidal current transformers such as the Lovato RTB110 detect residual current by measuring the vector sum of the currents flowing through the conductors that pass through the toroid. Under normal operating conditions these currents balance, while an imbalance indicates leakage current that can be evaluated by the connected earth leakage relay.
For correct installation, all live conductors of the monitored circuit, including the neutral where present, should pass through the RTB110 while the protective earth conductor remains outside. Connection wires between the toroid and relay should be twisted, kept away from power cables and kept as short as practical to help maintain reliable signal integrity.
Typical Applications
- Type B earth leakage protection systems.
- Industrial electrical distribution panels.
- Machinery and automation control cabinets.
- Power distribution circuits with larger conductor groups.
- Electrical installations requiring residual current monitoring.
- OEM panels incorporating Lovato earth leakage relays.
Technical Specifications
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| Monitoring Function | Current | |
|---|---|---|
| Manufacturer | Lovato Electric | |
| Series | RTB | |
| Model | RTB110 | |
| Product type | Toroidal current transformer | |
| Residual operation characteristic | Type B | |
| Internal diameter | 4.33 in | |
| Recommended residual current threshold | ≥100 mA | |
| Overall height | 150 mm | |
| Overall width | 160 mm | |
| Overall depth | 110 mm | |
| Mounting depth | 70 mm | |
| Mounting width | 70 mm | |
| Mounting centres | 63 mm | |
| Body thickness | 50 mm | |
| Weight | 680 g | |
| ETIM 8.0 classification | EC002048 - Current transformer | |
| Compliance | IEC/EN/BS 60947-2 | |
| EAN13 | 8013975323878 | |
| HS code | 85043121 |
Frequently Asked Questions
What is the Lovato RTB110 used for?
The RTB110 is a Type B toroidal current transformer used with compatible earth leakage relays to monitor residual current in electrical circuits.
What is the internal diameter of the RTB110?
The Lovato RTB110 has an internal aperture diameter of 110 mm, equivalent to approximately 4.33 in.
What residual current threshold is the RTB110 intended for?
In Lovato Type B earth leakage relay systems, the RTB110 is intended for residual current thresholds of 100 mA or higher.
Which conductors should pass through the RTB110?
The monitored phase conductors and neutral, where present, should pass through the toroid, while the protective earth conductor must remain outside.
Which standard does the Lovato RTB110 comply with?
The RTB110 is specified in accordance with IEC/EN/BS 60947-2.
Trusted by Electrical Engineers Worldwide
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.
