Why Choose the Lovato RFN381800 Motor Protection Relay?
The Lovato RFN381800 is a reliable thermal motor protection relay designed to protect three-phase motors against overload conditions in industrial motor control applications. As part of the Lovato RFN38 motor protection relay range, it provides adjustable thermal protection with dependable operation in motor starter and automation systems.
This motor protection relay features a three-pole thermal release with a class 10A tripping characteristic, helping protect motors from sustained overload conditions. Its adjustable current setting, manual or automatic reset capability and integrated auxiliary contacts provide flexible installation options for industrial control applications.
With an adjustable operating current range of 12–18 A, the RFN381800 is suitable for protecting industrial motors in a variety of applications. The relay includes 1NO + 1NC auxiliary contacts for control and signalling circuits and is designed for use with compatible Lovato contactors.
Key Advantages
- Reliable thermal motor overload protection for industrial applications.
- 12–18 A adjustable current range for accurate motor protection.
- Three-pole design suitable for three-phase motor circuits.
- Class 10A tripping characteristic for motor overload protection.
- Manual or automatic reset functionality for flexible operation.
- Integrated auxiliary contacts for control and fault signalling.
Key Features
- Lovato RFN38 motor protection relay series.
- 12–18 A adjustable operating current.
- Three-pole thermal overload protection.
- Class 10A tripping characteristic.
- Manual or automatic reset mode.
- Integrated test button and trip indicator.
- 1NO + 1NC auxiliary contacts for control and signalling.
- 690 V rated insulation voltage.
- 6 kV rated impulse withstand voltage.
Reliable Motor Protection for Industrial Systems
Thermal motor protection relays such as the Lovato RFN381800 monitor motor current and help prevent damage caused by prolonged overload conditions. Correctly adjusting the relay to the motor's rated current provides effective protection against overheating and excessive current.
The RFN38 series is designed for industrial motor control applications requiring dependable overload protection, flexible resetting and reliable auxiliary signalling. The RFN381800 provides a compact solution for protecting motors in machinery, automation equipment and electrical control panels.
Typical Applications
- Industrial motor control panels.
- Pumps and ventilation equipment.
- Conveyor and material handling systems.
- Production and processing machinery.
- Industrial automation equipment.
- OEM motor starter assemblies.
