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RFN383800 – T/O RELAY 32-38A MAN/AUTO
Lovato RFN383800 is a three-pole Class 10A thermal motor protection relay with a 32–38 A adjustable operational current range, manual or automatic reset and direct mounting on BF09–BF38 contactors.
£72.91
Why Choose the Lovato RFN383800 Thermal Overload Relay?
The Lovato RFN383800 is a robust and reliable thermal motor protection relay designed to protect three-phase motors against sustained overload conditions. As part of the Lovato RFN38 motor protection relay series, it features a three-pole thermal release and non-phase-failure-sensitive operation for industrial motor control applications.
The RFN383800 provides selectable manual or automatic resetting, allowing the reset method to be configured to suit the application. Its Class 10A tripping characteristic, integrated test button and trip indicator support dependable motor protection and straightforward commissioning, while one normally open and one normally closed auxiliary contact enable integration with control and signalling circuits.
With an adjustable operational current range of 32–38 A and a rated operational voltage of 690 V, the RFN383800 is suitable for industrial three-phase motor circuits. The relay mounts directly on Lovato BF09–BF38 contactors and provides IP20 frontal protection for installation within electrical control panels and machinery.
Key Advantages
- Reliable thermal overload protection for three-phase motors.
- 32–38 A adjustable operational current range for accurate motor protection settings.
- Selectable manual or automatic reset to suit the motor control application.
- Class 10A tripping characteristic for defined overload response.
- Integrated test button and trip indicator simplify testing and fault identification.
- Direct mounting on Lovato BF09–BF38 contactors for compact motor starter assemblies.
Key Features
- Lovato RFN38 motor protection relay series.
- 32–38 A adjustable operational current range.
- Three-pole thermal release.
- 690 V rated operational voltage.
- Selectable manual or automatic reset mode.
- Class 10A tripping characteristic.
- Non-phase-failure and non-single-phase-sensitive operation.
- Integrated test button and trip indicator.
- 1 NO + 1 NC auxiliary contacts.
- Direct mounting on BF09–BF38 contactors.
Reliable Motor Protection for Industrial Machinery
Thermal overload relays such as the Lovato RFN383800 protect electric motors by responding to sustained overcurrent conditions that can cause excessive heating and equipment damage. Its adjustable 32–38 A operating range allows the protection setting to be matched to the motor, while the Class 10A tripping characteristic provides a defined overload response.
The RFN383800 is designed for motor circuits where phase failure sensitivity is not required. Its selectable manual or automatic reset, test button, trip indicator and auxiliary contacts support flexible integration into industrial control systems, while direct mounting on compatible Lovato BF contactors enables compact motor starter construction.
Typical Applications
- Three-phase motor overload protection.
- Industrial conveyors and material handling systems.
- Pumps, fans and ventilation equipment.
- Compressors, mixers and processing machinery.
- Industrial machinery and automation equipment.
- Motor starter assemblies using Lovato BF09–BF38 contactors.
Technical Specifications
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| Current Range | 32–38 A | |
|---|---|---|
| Device Type | Thermal Overload Relay | |
| Compatible With | BF09–BF38 | |
| Terminal Type | Screw | |
| Monitoring Function | Temperature / thermistor | |
| Monitored Supply | Single-phase | |
| Reset Type | Manual or automatic | |
| Load Voltage | 690 V | |
| Contacts | 1NO + 1NC | |
| IP Rating | IP20 | |
| HS Code | 85364900 | |
| Manufacturer | Lovato Electric | |
| Series | RFN38 | |
| Model | RFN383800 | |
| Product type | Thermal motor protection relay | |
| Number of poles | 3 | |
| Type of release | Thermal | |
| Operational current | 32–38 A | |
| Rated operational voltage | 690 V | |
| Rated insulation voltage Ui | 690 V | |
| Rated impulse withstand voltage Uimp | 6 kV | |
| Operational frequency | 0–400 Hz | |
| Tripping class | 10A | |
| Reset mode | Manual or automatic | |
| Phase failure detection | No | |
| Test button | Yes | |
| Trip indicator | Yes | |
| Protection rating | IP20 frontal | |
| Overvoltage category | III | |
| Pollution degree | 3 | |
| gG protection fuse | 63 A | |
| aM protection fuse | 40 A | |
| RK5 protection fuse | 150 A | |
| Auxiliary contacts | 1 NO + 1 NC | |
| Conventional free-air thermal current Ith | 10 A | |
| Terminal type | Screw and washer | |
| Terminal screw | M4 | |
| Terminal width | 12.6 mm | |
| Terminal tool | Phillips 2 | |
| Terminal tightening torque | 2–2.5 Nm | |
| Maximum conductor size | AWG 8 | |
| Operating temperature | -25 to 60 °C | |
| Storage temperature | -50 to 70 °C | |
| Compensation temperature | -20 to 60 °C | |
| Maximum altitude | 3000 m | |
| Normal operating position | Vertical plane | |
| Permitted mounting position | ±30° | |
| Mounting type | Direct mounting on BF09–BF38 contactors | |
| Full-load current at 480 V | 38 A | |
| Full-load current at 600 V | 38 A | |
| Weight | 160 g |
Frequently Asked Questions
What is the Lovato RFN383800 used for?
The Lovato RFN383800 is a three-pole thermal motor protection relay designed to protect compatible three-phase motors against sustained overload conditions.
What current range does the Lovato RFN383800 support?
The relay has an adjustable operational current range of 32–38 A.
Does the Lovato RFN383800 support automatic reset?
Yes. The RFN383800 supports manual or automatic resetting, allowing the reset mode to be selected to suit the application.
Does the Lovato RFN383800 detect phase failure?
No. The RFN383800 is non-phase-failure and non-single-phase sensitive.
Which contactors can the Lovato RFN383800 be mounted on?
The relay is designed for direct mounting on Lovato BF09–BF38 contactors.
Trusted Motor Protection from Lovato Electric
Lovato Electric RFN38 thermal motor protection relays provide adjustable overload protection and direct integration with compatible BF contactors for compact and dependable industrial motor control applications.
