Why Choose the Lovato 11RFNA91 Thermal Overload Relay?
The Lovato 11RFNA91 is a three-pole thermal motor protection relay designed for direct mounting on Lovato BG06, BG09 and BG12 mini-contactors. With an adjustable operational current range of 0.6–1 A, it provides thermal overload protection for compatible three-phase motor control applications.
Part of the Lovato RFNA9 motor protection relay series, the 11RFNA91 uses a thermal release and features automatic resetting, a test button and a trip indicator. Its direct-mounting design enables compact integration with compatible BG mini-contactors in motor starters and industrial control panels.
The relay has a 690 V rated operational voltage, 690 V rated insulation voltage and 8 kV rated impulse withstand voltage. It is a Class 10A overload relay and provides IP20 frontal protection for use within suitable electrical enclosures.
Key Advantages
- Adjustable 0.6–1 A operational current range for motor overload protection.
- Direct mounting on Lovato BG06, BG09 and BG12 mini-contactors.
- Three-pole thermal overload relay for three-phase applications.
- Automatic reset functionality.
- Integrated test button and trip indicator.
- Class 10A tripping characteristic.
- 690 V rated operational and insulation voltage.
- Compact IP20 frontal protection for control-panel installations.
Key Features
- Lovato RFNA9 motor protection relay series.
- 0.6–1 A adjustable operational current.
- Three-pole configuration.
- Thermal release.
- Automatic reset mode.
- Class 10A tripping class.
- 690 V rated operational voltage.
- 8 kV rated impulse withstand voltage.
- Operational frequency range up to 400 Hz.
- Screw and washer terminals with M4 screws.
- Operating temperature range of -20 to +55 °C.
- Suitable for operation at altitudes up to 3000 m.
Thermal Overload Protection for Three-Phase Motors
Thermal overload relays protect motors by responding to sustained overcurrent conditions that can cause excessive heating. When the current exceeds the configured operating range for sufficient time, the relay trips the associated control circuit to help protect the motor and connected equipment.
The Lovato 11RFNA91 combines an adjustable 0.6–1 A current range with Class 10A tripping and direct mounting on compatible BG mini-contactors. Its automatic reset function, test button and trip indication support practical operation and maintenance within compact motor starter assemblies.
Typical Applications
- Three-phase motor overload protection.
- Motor starters using Lovato BG06, BG09 or BG12 mini-contactors.
- Industrial machinery control panels.
- Compact motor control assemblies.
- OEM automation and machine-building equipment.
- Industrial motor switching and protection systems.
