Marathon Motors MR390 R390 IEC Frame Motor - MR390

Marathon Motors MR390 R390 IEC Frame Motor -  MR390

The Marathon MI223A General Purpose Motor is designed for various industrial applications. Featuring a robust construction and reliable performance, this motor is capable of handling demanding operational needs.

Product Highlights

This motor is ideal for industrial tasks that require high performance and durability. It comes with a TEFC (Totally Enclosed Fan-Cooled) enclosure and is built from rolled steel for long-lasting use.

Features

• 5 HP power output
• 3530 RPM speed
• 208-230V voltage range

Specifications

What our Experts Think

• IEC Metric Design: Engineered to meet international IEC standards, ensuring compatibility with global equipment and systems.

• Reliable Performance: Delivers consistent operation with a 0.75 HP rating and 1690 RPM speed, suitable for various industrial applications.

• Robust Enclosure: Features a Totally Enclosed Fan Cooled (TEFC) design, providing protection against dust and moisture.

• Energy Efficient: Achieves a full-load efficiency of 74%, contributing to energy savings over time.

• Versatile Mounting: Designed for horizontal orientation with a rigid base mount, offering flexibility in installation.

• Durable Construction: Built with Class F insulation and ball bearings, ensuring longevity and reliable service.

Q&A

Q: What is the Marathon Motors MR390 R390 IEC Frame Motor?
A: The MR390 is a 0.75 HP, three-phase, IEC metric frame motor built for continuous-duty industrial applications with high reliability and performance.

Q: Is the MR390 inverter-rated?
A: Yes, it supports inverter use with a 20:1 constant torque and 10:1 variable torque speed range.

Q: What frame size and mounting does it use?
A: The MR390 uses IEC Frame Size 80 with rigid base mounting for stable, secure installation.

Q: What are common uses for this motor?
A: Ideal for compressors, fans, blowers, conveyors, and other continuous-duty industrial equipment.

Q: What makes the MR390 a reliable choice?
A: It’s UL, CSA, and CE certified, built with premium materials for durability, and designed for efficient operation in harsh conditions.

Maintenance Tips

• Routine Inspection: Check monthly for vibration, unusual noise, or overheating.

• Clean Housing: Keep the motor surface and cooling fins free of dust and debris.

• Lubrication: Follow factory guidelines; grease bearings as recommended.

• Secure Mounting: Ensure motor is firmly mounted and all bolts are tight.

• Electrical Checks: Inspect wiring and terminal connections regularly.

• Proper Ventilation: Operate in well-ventilated, dry environments to protect internal components.