RF91V5 Lovato RF9 overload relay BG mini contactors 0.9-1.5 amp 0.55 kw

Why Choose the Lovato 11RF91V5 Thermal Overload Relay?

The Lovato 11RF91V5 is a compact and highly reliable thermal overload relay designed to provide advanced motor protection for three-phase industrial applications. As part of the robust Lovato RF9 motor protection relay series, it is engineered to protect electric motors against overload conditions, phase failure and single-phasing faults in demanding automation and machine control systems.

This motor protection relay helps improve operational reliability and equipment safety by disconnecting the motor during abnormal current conditions. The direct mounting design allows fast installation onto compatible Lovato BG06, BG09 and BG12 mini-contactors, reducing panel assembly time while simplifying maintenance and replacement procedures.

With an adjustable current range of 0.9–1.5 A, integrated phase-failure sensitivity and a manual reset mechanism, the 11RF91V5 is ideal for protecting small industrial motors used in conveyors, pumps, compressors, fans and production machinery. Its compact construction and dependable tripping performance make it suitable for demanding industrial environments.

Key Advantages

• Reliable thermal overload protection for three-phase motors.
• 0.9–1.5 A adjustable current range for flexible motor protection.
• Integrated phase-failure and single-phase sensitivity.
• Manual reset operation for improved operational safety.
• Direct mounting onto Lovato BG series mini-contactors.
• Compact design suitable for industrial control panels and OEM systems.

Key Features

• Lovato RF9 thermal overload relay series.
• 0.9–1.5 A overload adjustment range.
• Three-pole motor protection relay.
• Integrated phase-loss protection.
• Class 10A tripping characteristic.
• 1 NO + 1 NC auxiliary contacts included.
• Compatible with BG06, BG09 and BG12 contactors.
• Direct mounting design for fast installation.

Technical Specifications

• Manufacturer: Lovato Electric
• Series: RF9 Thermal Overload Relays
• Model: 11RF91V5
• Product type: Thermal overload relay
• Adjustable current range: 0.9–1.5 A
• Number of poles: 3-pole
• Tripping class: Class 10A
• 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. 114 g

Reliable Motor Protection for Industrial Applications

Thermal overload relays such as the Lovato 11RF91V5 continuously monitor motor current and disconnect the motor supply during overload or phase-loss conditions. This helps prevent motor overheating, winding damage and unexpected downtime while improving equipment longevity and operational safety.

The RF9 series is widely used in industrial automation systems requiring dependable and compact motor protection. Its phase-failure sensitivity improves motor safety by rapidly detecting abnormal current conditions caused by voltage imbalance or single-phasing faults.

Typical Applications

• Industrial conveyors and material handling systems.
• Pumps, compressors and ventilation equipment.
• Packaging and processing machinery.
• Machine tools and automation systems.
• OEM control panels and starter assemblies.
• General three-phase motor protection applications.

Trusted by Industrial Automation Engineers

Lovato RF9 thermal overload relays are widely trusted by automation engineers and panel builders for dependable motor protection, compact installation and long-term reliability in industrial control systems.