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RTB060 Lovato TOROID CT EARTH LEAK. RELAY TYPE B D60MM
Lovato RTB060 is a Type B toroidal current transformer with a 60 mm internal aperture designed for AC, DC and pulsating residual-current sensing with compatible Lovato Type B earth leakage relays.
£150.25
Why Choose the Lovato RTB060 Type B Toroidal Current Transformer?
The Lovato RTB060 is a Type B toroidal current transformer designed for residual-current monitoring and protection when used with compatible Lovato earth leakage relays. Its Type B characteristics enable the measurement of AC, DC and pulsating leakage currents, making it suitable for modern electrical installations containing power electronic equipment.
Featuring a 60 mm internal aperture, the RTB060 provides additional conductor capacity compared with smaller toroids while supporting monitored circuits with a minimum rated current of 30 mA. Lovato specifically designs the RTB range for use with compatible Type B earth leakage relays, including the RM2DB230, which provides the associated trip-current sensitivity.
The RTB060 offers 10–15% measurement accuracy, IP20 protection and a 2.5 kV insulation pulse test. Its ability to monitor leakage currents containing DC components and frequencies up to 1 kHz makes it particularly useful for applications such as variable speed drives, EV charging equipment, UPS systems, photovoltaic installations and active filters.
Key Advantages
- Designed specifically for Type B residual-current monitoring and protection.
- Measures AC, DC and pulsating leakage currents.
- Generous 60 mm internal aperture for compatible circuit conductors.
- Suitable for monitored circuits with a minimum rated current of 30 mA.
- Designed for use with compatible Lovato Type B earth leakage relays.
- Suitable for installations containing variable speed drives, EV chargers and other power electronics.
- IP20 enclosure protection for professional electrical installations.
Key Features
- Lovato RTB series toroidal current transformer.
- Type B differential protection.
- 60 mm (2.36 in) useful internal diameter.
- Detection of AC, DC and pulsating residual currents.
- Suitable for leakage-current components with frequencies up to 1 kHz.
- 30 mA minimum rated current of the monitored circuit.
- 10–15% measurement accuracy.
- 2.5 kV insulation pulse test.
- 6 fixed screw terminals.
- Maximum terminal conductor section of 2.5 mm².
- IP20 protection degree.
- Designed for integration with compatible Type B earth leakage relay systems.
Type B Residual-Current Monitoring for Modern Electrical Loads
Type B residual-current monitoring is important in electrical systems where power electronics can generate leakage currents containing AC, pulsating DC or smooth DC components. The Lovato RTB060 is specifically designed to measure these residual currents and, when connected to a compatible Type B earth leakage relay, can be used to monitor single-phase or three-phase loads including variable speed drives, electric vehicle charging equipment, UPS systems, photovoltaic plants and active filters.
For correct residual-current measurement, all live conductors of the monitored circuit must pass through the RTB060 aperture, including the neutral conductor when present, while the protective earth conductor must not pass through the toroid. Lovato also recommends keeping the toroid-to-relay wiring away from power cables, minimising the connection distance and using shielded wiring where strong electromagnetic fields are present.
Typical Applications
- Type B earth leakage monitoring and protection systems.
- Variable speed drive and inverter installations.
- Electric vehicle charging equipment.
- Uninterruptible power supply (UPS) systems.
- Photovoltaic power installations.
- Active filter applications.
- Industrial machinery containing power electronic equipment.
- Single-phase and three-phase circuits requiring detection of AC and DC leakage-current components.
Technical Specifications
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| Monitoring Function | Earth leakage / residual current | |
|---|---|---|
| IP Rating | IP20 | |
| Manufacturer | Lovato Electric | |
| Series | RTB | |
| Model | RTB060 | |
| Product designation | Toroidal current transformer | |
| Product type | Toroidal current transformer for earth leakage relays | |
| Residual operation characteristic | Type B | |
| Toroidal transformer diameter | 60 mm (2.36 in) | |
| Minimum rated current of monitored circuit | 30 mA | |
| Measurement accuracy | 10–15% | |
| Insulation pulse test | 2.5 kV | |
| Terminal type | Fixed screw terminals | |
| Number of terminals | 6 | |
| Maximum conductor cross-section | 2.5 mm² | |
| Protection degree | IP20 | |
| Operating temperature | -10 to +60 °C | |
| Storage temperature | -20 to +80 °C | |
| Relative humidity | 10–95% | |
| Dimension A | 100 mm | |
| Dimension B | 110 mm | |
| Dimension C | 60 mm | |
| Internal diameter D | 60 mm | |
| Dimension E | 47 mm | |
| Dimension F | 70 mm | |
| Dimension G | 63 mm | |
| Dimension H | 50 mm | |
| Reference standards | IEC 62020, IEC 60755, IEC 60947-2-M, IEC 61869-2 | |
| ETIM 8.0 classification | EC002048 – Current transformer | |
| Catalogue weight | 392 g | |
| Quantity per package | 1 | |
| Package dimensions | 113 × 72 × 120 mm | |
| EAN | 8013975323854 | |
| HS code | 85043121 |
Frequently Asked Questions
What is the Lovato RTB060?
The RTB060 is a Type B toroidal current transformer with a 60 mm internal aperture, designed for residual-current sensing with compatible Lovato Type B earth leakage relays.
What types of leakage current can the RTB060 detect?
The Lovato RTB060 is designed for measuring AC, DC and pulsating leakage currents as part of a compatible Type B residual-current monitoring system.
What is the internal diameter of the RTB060?
The RTB060 has a useful internal toroidal diameter of 60 mm (2.36 in).
Can the RTB060 be used with a 30 mA monitored circuit?
Yes. Lovato specifies a minimum rated current of the monitored circuit of 30 mA for the RTB060.
Which applications are suitable for the RTB060?
The RTB060 is suitable for Type B residual-current monitoring in applications such as variable speed drives, EV charging equipment, UPS systems, photovoltaic plants and active filters.
Which conductors should pass through the RTB060?
The phases and neutral conductor, when present, of the monitored circuit should pass through the toroid. The protective earth conductor must not pass through the RTB060.
What protection rating does the Lovato RTB060 have?
The RTB060 has an enclosure protection degree of IP20 and is designed for professional electrical protection installations.
Trusted Type B Earth Leakage Monitoring from Lovato Electric
Lovato Electric Type B earth leakage monitoring components provide dependable residual-current sensing for modern electrical installations, including systems containing variable speed drives, photovoltaic equipment, UPS systems and EV charging technology where AC and DC leakage-current components may be present.
