RF823300 Lovato RF82 overload relay 20-33 amp dol 15kw star/delta at 22kw

Why Choose the RF823300?

Lovato’s RF823300 thermal overload relay delivers dependable motor protection for three‑phase applications. Sensitive to phase failure and single‑phasing, the RF823300 guards against damaging overloads across an adjustable 20…33 A range. The manual reset design supports safe, controlled restarts, while direct mounting on BF40…BF94 contactors keeps assemblies compact. Rated Ui 690 V with IP20 frontal protection, it’s a robust choice for modern motor control panels.

Designed as a three‑pole device for BF series contactors, this thermal overload relay meets IEC/EN 60947-1 and 60947‑4‑1, plus UL508 and CSA C22.2 n° 14. It withstands 8 kV impulse voltage, operates from −20 to 55 °C up to 3000 m altitude, and offers pollution degree 3. With straightforward panel integration and proven Lovato build quality, it helps ensure reliable, standards‑compliant motor protection.

Key Benefits

• Phase failure and single‑phase sensitive for dependable three‑phase motor protection.
• Adjustable 20…33 A setting range to match motor full‑load current.
• Manual reset enables safe, controlled restarts after fault clearance.
• Direct mounting on BF40…BF94 contactors saves space and wiring time.
• Robust insulation: Ui 690 V and Uimp 8 kV withstand surges.
• IP20 frontal protection enhances operator safety during panel access.
• Operates −20 to 55 °C and up to 3000 m altitude.

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: 3.9 to 3.9 Nm
• Ith (IEC): 10 A
• Operating temperature: -20 to 55 °C
• Storage temperature: -55 to 80 °C
• Max altitude: 3000 m
• Weight: 365 g

What’s Included

• Lovato RF823300 thermal overload relay
• Manufacturer technical datasheet (downloadable PDF)
• Product labelling and conformity information

Applications

• Motor control centres and industrial distribution panels
• Pumps, fans and compressors using BF series contactors
• Conveyors and material handling systems
• HVAC and general building services motors

Safety note: Installation and adjustment should be performed by qualified personnel only. Isolate the supply before work, set the relay to the motor’s full‑load current, and observe the stated environmental limits and applicable IEC/EN 60947 standards.