lovato sm1r1800 sm1 rotary control motor circuit breaker 13 - 18 amp

Why Choose the SM1R1800?

The Lovato SM1R1800 motor protection circuit breaker delivers reliable protection for three‑phase motors with a 13–18 A thermal trip adjustment range and 18 A rated current. With a formidable 100 kA Icu at 400 V and magnetic and thermal protection, it safeguards against overloads and short circuits. A rotary knob provides clear, simple control, while the compact 3‑pole design integrates neatly into control panels.

Engineered for demanding environments, the SM1R range offers 690 V Ui and 6 kV Uimp, a mechanical life of 100,000 cycles, and dependable operation from −20 to +60 °C up to 3000 m altitude. Terminals tighten to 2.5–3 Nm for secure connections. Conforms to IEC/EN 60947-1/-2/-4-1, UL508 and CSA C22.2 n° 14, with a Sustainability certification to support responsible specification.

Key Benefits

• High 100 kA Icu at 400 V for strong short‑circuit protection.
• Adjustable 13–18 A thermal range suits varied motor loads.
• Combined magnetic and thermal protection enhances reliability.
• 3‑pole design ideal for three‑phase motor circuits.
• Rotary control knob enables quick, intuitive setting and reset.
• Robust 690 V insulation and 6 kV impulse withstand.
• Wide −20 to +60 °C operating temperature for harsh sites.

Technical Specification

• Product type designation: SM1R
• Number of poles: 3
• Rated insulation voltage Ui (IEC/EN): 690 V
• Rated impulse withstand voltage Uimp: 6 kV
• Mechanical life: 100000 cycles
• Terminal tightening torque: 2.5 to 3 Nm
• Operating temperature: -20 to +60 °C
• Storage temperature: -50 to +80 °C
• Max altitude: 3000 m
• Weight: 390 g

What’s Included

• Lovato SM1R1800 motor protection circuit breaker unit
• Installation and safety instructions

Applications

• Protection of three‑phase motors within the 13–18 A setting range.
• Control panels requiring IEC/EN 60947 compliant motor protection.
• Installations needing 100 kA breaking capacity at 400 V.
• Sites operating between −20 and +60 °C up to 3000 m altitude.

Safety note: Installation must be performed by qualified personnel. Isolate the supply before work, tighten terminals to 2.5–3 Nm, and observe the stated operating limits and standards.