RF91 Lovato RF9 overload relay BG mini contactors 0.6-1 amp 0.37 kw

Why Choose the Lovato 11RF91 Thermal Overload Relay?

The Lovato 11RF91 is a compact and highly reliable thermal overload relay designed to provide dependable motor protection for three-phase industrial applications. As part of the advanced Lovato RF9 motor protection relay series, it is specifically engineered to safeguard motors against overload conditions, phase failure and single-phasing faults in demanding automation systems.

This overload relay helps improve motor reliability and operational safety by disconnecting the motor during abnormal operating conditions. Its direct mounting design allows seamless installation onto compatible Lovato BG06, BG09 and BG12 mini-contactors, simplifying panel assembly and reducing installation time for OEM machine builders and industrial electricians.

With an adjustable current range of 0.6–1 A and integrated phase-failure sensitivity, the 11RF91 is ideal for protecting small three-phase motors used in conveyors, pumps, fans and compact industrial machinery. The relay’s manual reset functionality ensures safe restart procedures and dependable motor protection in industrial environments.

Key Advantages

• Reliable thermal overload protection for three-phase motors.
• Adjustable current range of 0.6–1 A for flexible motor protection.
• Integrated phase-failure and single-phase sensitivity.
• Manual reset functionality for improved operational safety.
• Direct mounting onto Lovato BG series mini-contactors.
• Compact design simplifies installation in electrical control panels.

Key Features

• Lovato RF9 thermal overload relay series.
• 0.6–1 A adjustable overload setting.
• Three-pole motor protection relay.
• Integrated phase-loss protection.
• Manual reset operation.
• 1 NO + 1 NC auxiliary contacts included.
• Direct mounting on BG06, BG09 and BG12 contactors.
• Class 10 tripping characteristic for motor protection.

Technical Specifications

• Manufacturer: Lovato Electric
• Series: RF9 Thermal Overload Relays
• Model: 11RF91
• Product type: Thermal overload relay
• Adjustable current range: 0.6–1 A
• Number of poles: 3-pole
• Reset type: Manual reset
• Protection type: Phase failure / single-phase sensitive
• Auxiliary contacts: 1 NO + 1 NC
• Mounting type: Direct mounting on contactor
• Compatible contactors: BG06, BG09, BG12
• Protection rating: IP20
• Rated insulation voltage: 690 V
• Operating temperature: -20 °C to +55 °C
• Weight: approx. 115 g

Reliable Motor Protection for Industrial Applications

Thermal overload relays such as the Lovato 11RF91 protect electric motors by monitoring motor current and disconnecting the circuit during overload or phase-loss conditions. This helps prevent motor overheating, winding damage and unexpected equipment downtime.

The RF9 series is designed for industrial control systems requiring compact motor protection solutions. Its phase-failure sensitivity improves motor safety by rapidly detecting abnormal current conditions that can occur during single-phasing or supply imbalance situations.

Typical Applications

• Industrial conveyors and material handling systems.
• Small pumps and ventilation equipment.
• Packaging and production machinery.
• Machine tools and compact automation systems.
• OEM control panels and industrial starter assemblies.
• General three-phase motor protection applications.

Trusted by Industrial Automation Engineers

Lovato thermal overload relays are widely used by panel builders and automation engineers to provide dependable motor protection, improved operational safety and long-term reliability in industrial control systems.