Why Choose the Lovato RFA823300 Motor Protection Relay?
The Lovato RFA823300 is a three-pole thermal overload motor protection relay designed to protect three-phase motors against overload, phase failure and single-phasing conditions. Part of the Lovato RFA82 motor protection relay range, it provides an adjustable operational current range of 20–33 A and is designed for direct mounting on Lovato BF40–BF94 contactors.
The RFA823300 features automatic resetting, allowing the relay to reset automatically after an overload trip once operating conditions permit. Its phase-failure sensitivity, Class 10A tripping characteristic, test button and trip indicator provide practical protection and status indication for industrial motor control systems.
With a rated operational voltage and insulation voltage of 690 V, an 8 kV rated impulse withstand voltage and an operational frequency range of 0–400 Hz, the RFA823300 is engineered for industrial motor starter applications. Its direct BF contactor mounting provides a compact installation within electrical control panels and machinery.
Key Advantages
- 20–33 A adjustable operational current range for motor overload protection.
- Three-pole thermal overload relay for three-phase motor applications.
- Phase-failure and single-phase sensitive design for enhanced motor protection.
- Automatic resetting for applications requiring automatic reset after a trip.
- Class 10A tripping characteristic for motor overload protection.
- Direct mounting on Lovato BF40–BF94 contactors for compact motor starter assemblies.
Key Features
- Lovato RFA82 thermal overload relay series.
- 20–33 A operational current range.
- 690 V rated operational voltage.
- 690 V rated insulation voltage Ui.
- 8 kV rated impulse withstand voltage Uimp.
- 0–400 Hz operational frequency range.
- Class 10A thermal overload protection.
- IP20 frontal protection rating.
- 1 NO + 1 NC auxiliary contacts.
- Integrated test button and trip indicator.
Reliable Thermal Overload Protection for Industrial Motors
Thermal overload relays help protect electric motors by responding when sustained current exceeds the selected operating range. The Lovato RFA823300 combines an adjustable 20–33 A current setting with phase-failure sensitivity and Class 10A tripping performance for dependable protection of compatible three-phase motor circuits.
Designed for direct mounting on Lovato BF40–BF94 contactors, the RFA823300 supports compact motor starter construction. Its automatic reset function, test button, trip indicator and auxiliary contacts provide practical functionality for industrial motor control and automation systems.
Typical Applications
- Three-phase industrial motor protection.
- Motor starters using Lovato BF40–BF94 contactors.
- Industrial machinery and production equipment.
- Pumps, fans and material handling systems.
- Electrical control panels and motor control centres.
- Industrial automation and process equipment.
