Lovato SM1R0160 Rotary Motor Protection Breaker 1-1.6 A

Lovato SM1R0160 Type E motor protection breaker, 1 to 1.6 A

The Lovato SM1R0160 is a three-pole motor protection circuit breaker with a rotary handle and a thermal range of 1 to 1.6 A. The R in the family name marks the rotary-operated version, and the catalogue lists UL manual self-protected combination motor controller (Type E) short-circuit ratings for it. Seven Star LLC supplies the SM1R0160 in Oman and the GCC as an independent supplier in Muscat.

The code reads as SM1R for the rotary family and 0160 for a rated current of 1.6 A. Its electrical data match the push-button SM1P0160, but the front is a rotary handle, which gives a clear on, off and tripped indication and is convenient to operate through a panel door. This page covers the facts listed in the catalogue for this exact part.

SM1R0160 technical specifications

What the Type E rating means for the SM1R0160

In North American practice a Type E controller is a manual self-protected combination motor controller that can be used with a line-side adapter or directly in certain installations, subject to the marking on the device and the rules of the standard UL 508 and UL 60947-4-1. The catalogue lists the high fault ratings above for this breaker, which makes it relevant for equipment built to US-style specifications and exported to the Gulf.

Projects that follow only IEC rules need not use these figures. Still, they are a useful sign of the robust switching performance at 100 kA, which is more than adequate for any panel fed through a normal distribution transformer.

How the SM1R0160 protects the motor

The thermal release uses a bimetal element on a class 10A curve. The magnetic release is at 13 times the rated current, about 21 A at the top setting. Phase loss detection accelerates the trip when a conductor fails. The mechanism is switched by the rotary handle, which also clearly shows the on, off and tripped positions.

SM1R0160 in the SM1R series

The SM1R series follows the SM1P series by current band: SM1R0100, SM1R0160, SM1R0250, SM1R0400 and so on to SM1R3200. A designer can therefore choose the front style first and the current band second. Replacing a push-button breaker by a rotary one is a mechanical change only when both have the same band, such as the SM1P0160 and SM1R0160 pair.

SM1R0160 selection checklist

• Motor nameplate current between 1 and 1.6 A
• Rotary handle needed for panel-door or isolation use
• UL Type E documentation required or not
• Fault level versus 100 kA breaking capacity
• Panel temperature and compensation limit of 50 °C
• Conductor size and number of wires per terminal
• Downstream contactor type for remote operation

Installation and maintenance of the SM1R0160

Mount by screws or on 35 mm rail, strip 12 mm and tighten the terminals to 2.5 to 3 Nm using a PH2 screwdriver. Set the thermal dial from the nameplate, test the handle in all positions and note the setting in the panel records.

At every service visit compare the measured current with the setting, check terminal tightness and operate the handle. A device that trips often at the same load is a warning of a mechanical or electrical problem in the motor, not a reason to turn the dial up.

Typical SM1R0160 applications in Oman and the GCC

At 1.6 A the breaker suits small dosing pumps, instrument air fans, sample conditioning pumps and cabinet blowers on skid packages, particularly packages built for export to the Gulf under UL-based specifications. Desert dust and high ambient heat make a sealed enclosure and clean filters important.

SM1R0160 against similar parts

A practical point on choosing between the push-button and rotary versions is how the panel is arranged. A rotary handle can be coupled to a door interlock or an extended shaft in some enclosures, while the push-button style is usually operated with the door open. The SM1R0160 therefore suits boards where the operator should reach the device from outside, but the enclosure drawing and the accessory list should be confirmed before ordering.

Information to send with an RFQ for the SM1R0160

• Part number SM1R0160 and quantity
• Motor current and voltage
• UL or IEC documentation need
• Prospective short-circuit current
• Panel temperature
• Delivery location

Site conditions in Oman for the SM1R0160

Low-voltage switching and protection devices in Oman often sit in motor control centres and outdoor panels where internal temperatures are high for much of the year. When you select the SM1R0160, check its rated values at your real ambient temperature, as stated in the manufacturer documentation, and confirm the coordination with upstream protection and with the motor or load it serves. Short-circuit levels differ from site to site, so verify the breaking capacity required at the point of installation.

Standardising ratings and coil voltages across a project reduces the number of spare part numbers that need to be stocked. Keeping a small stock of the SM1R0160 and recording settings such as trip ranges or ramp times shortens repair work during a breakdown.

Documents and quotation

Send the part number SM1R0160 and we will confirm the documents available for it, such as the technical data sheet, wiring diagram and instruction sheet, together with availability and lead time.

Seven Star LLC is an independent supplier in Muscat and is not an official channel of the manufacturer. Share the quantity, delivery location and project reference with the request and we will answer with a formal quotation.