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

Why Choose the 11RF91V5?

Engineered by Lovato, the 11RF91V5 is a thermal overload relay designed for reliable motor protection in three-phase systems. With a 0.9…1.5 A operational current range and three-pole configuration, it is phase failure/single‑phase sensitive to guard against imbalance. The unit offers manual resetting and direct mounting on BG06, BG09 and BG12 mini‑contactors, streamlining installation in compact control panels.

Built for dependable service, this relay features IP20 frontal protection, Ui 690 V, Uimp 8 kV and Ith 10 A. It operates from −20 to 55 °C, up to 3000 m altitude, and is rated Pollution Degree 3. Conformity with IEC/EN 60947-1 and 60947-4-1, plus UL508 and CSA C22.2 n° 14, supports use in internationally specified panels.

Key Benefits

• Adjustable 0.9–1.5 A range suits small three-phase motor protection.
• Phase failure/single-phase sensitive response reduces motor damage risk.
• Direct mounting on BG06/BG09/BG12 minimises wiring and panel space.
• Manual reset allows controlled restarts after fault clearance.
• IP20 frontal protection enhances safety during panel operation.
• Robust insulation ratings: Ui 690 V and Uimp 8 kV.
• Certified to IEC/EN 60947, UL508 and CSA standards.

Technical Specification

• Number of poles: 3
• Pollution degree: 3
• IP degree (frontal): IP20
• Rated insulation voltage Ui (IEC/EN): 690 V
• Rated impulse withstand voltage Uimp: 8 kV
• Terminal tightening torque: 2.3 to 2.3 Nm
• Ith (IEC): 10 A
• Operating temperature: -20 to 55 °C
• Storage temperature: -55 to 70 °C
• Max altitude: 3000 m
• Weight: 116 g

What’s Included

• Lovato 11RF91V5 thermal overload relay
• Quick-start and mounting instructions
• Manufacturer datasheet
• Protective packaging

Applications

• Three-phase motor protection within 0.9–1.5 A
• BG06/BG09/BG12 mini-contactor assemblies and upgrades
• Industrial control panels requiring phase failure protection
• OEM equipment built to IEC/EN 60947 requirements

Safety note: Install and set the relay only by qualified personnel. Always adjust the current range to the motor rating and follow applicable IEC/EN, UL and CSA standards during commissioning.