3 Phase General Purpose Motors

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Industrial-Grade Performance for Pumps, Compressors, Fans, and More

Square One Electric Motors & Pumps is your trusted source for premium-quality 3 Phase General Purpose Induction Motors at wholesale prices. Whether you're replacing a motor or powering new machinery, our wide selection of three phase AC motors ensures reliable performance across a range of commercial and industrial applications.

From pumps and compressors to conveyors and machine tools, these motors are engineered to meet or exceed U.S., Canadian, and Mexican energy efficiency standards.

Need a motor over 40HP? Contact us for a custom quote.



Each energy efficient motor ships brand new with the manufacturer’s warranty.


What Are General Purpose 3 Phase Motors?

Three phase induction motors are the standard workhorses in industrial and commercial settings. Designed for high torque and consistent operation, they power:

  • Pumps
  • Blowers
  • Compressors
  • Conveyors
  • Machine tools
  • HVAC equipment
  • Industrial processing lines

Unlike single-phase motors found used in homes and farms, 3 phase motors are ideal for factories, warehouses, and large facilities.

Standard Motor Features

  • Inverter-duty compatibility
  • TEFC or ODP enclosure options
  • Cast Iron or Rolled Steel construction
  • F1/F2 field conversion (select models)
  • Energy efficiency compliance (up to NEMA Premium)
  • 1-3-year warranty (model-dependent)

Types of 3 Phase Induction Motors

Squirrel Cage Induction Motors

The most widely used type, with rugged construction and minimal maintenance. Ideal for applications without speed variation—like grinders, fans, and conveyors.

Slip-Ring (Wound Rotor) Motors

Built for high torque startup and adjustable speed control. Common in hoists, elevators, and heavy machinery where load conditions vary.

🔧 Contact our team if you're unsure which type suits your needs.


Replacing Your Electric Motor? Start Here.

Replacing a 3 Phase AC Motor doesn't have to be overwhelming. In most cases, it’s as easy as searching the model number of the motor you want to replace.

If you don’t have the nameplate or your motor is obsolete, Use our Master Product Search or gather these key specs:

  • Application
  • Horsepower (HP)
  • RPM
  • Voltage: 208V, 230V, 460V, 480V
  • Enclosure type (e.g. TEFC, ODP)
  • Frame size
  • Direction of rotation

      ·        Mounting style: Footed (Standard Base), C-Face, D-Flange, Vertical Mount (Shaft Up or Shaft Down)

      📝 Tip: Horsepower, Frame, RPM, and Voltage are the most critical components.


      Understanding Key Motor Terms

      Horsepower (HP)

      The output power of a motor. Match this value exactly when replacing a motor unless advised otherwise.

      RPM (Speed)

      Available in 3600, 1800, 1200, and 900 base speeds, based on pole configuration.

      Frame

      Indicates shaft diameter, bolt hole spacing, and mounting dimensions. Refer to our NEMA Frame Chart for exact measurements.

      Enclosure Types

      • TEFC: Weather-resistant with built-in cooling fan
      • ODP: Indoor use, open frame for air circulation
      • TENV: Fully enclosed with no vents, cooled externally
      • OPEN: Vented, not suitable for dirty or wet areas

      📝 Read our Glossary of Terms for more information.

      📞 Need wiring help or unsure about specs? Call us at (302) 678-0400.


      Electric Motor Maintenance Tips

      Extend the life of your 3 phase motor with these practices:

      • Align the motor when you install it. Misaligned motors can have vibration that leads to worn housings and bearing failure. Even new assemblies (like a motor & pump assembly) should be aligned.
      • Keep the equipment lubricated with the right kind and amount of lubrication. Each type of equipment has specific requirements based on speed, industry, viscosity, etc. Be careful: over greasing is as bad as under greasing.
      • If it is critical equipment, consider installing a remote monitoring device, like the Weg Motor Scan. These configurable predictive maintenance tools monitor vibration, temperature, running hours, and send alerts.
      • Bearing failure is the most common cause of motor failure. Proper lubrication and environmental contaminants are the biggest culprits for bearing failure.

      Long-Term Motor Storage Guidelines

      Not installing your motor right away? Follow these storage tips:

      If you don’t plan on installing your equipment right away, we recommend the following procedures:

      • Keep the motors clean
        • Keep motors covered to eliminate dust and dirt
        • Cover openings to prevent rodents, birds, or insects from taking up residence
      • Keep the motors dry
        • Temperature swings should be minimal to prevent condensation
        • Space heaters are recommended to prevent condensation
        • Treat unpainted flanges, shafts, and fitting with a rust inhibitor
        • Check insulation resistance before putting motor into service
      • Keep bearings lubricated
        • Rotate shafts once a month to distribute grease in bearings

      If unit has been stored more than a year, add grease before start-up

      📦 Visit our Electric Motor Storage Guide


      Why Choose Square One Electric?

      • 🏢 Authorized Distributor & Service Center for Top Brands
      • 🚚 Fast, Nationwide Shipping from Nearest Warehouse
      • 🛠️ All Motors Are Brand New & Backed by Manufacturer Warranty
      • ⚙️ Expert Help with Motor Selection and Replacement

      Shop Leading Electric Motor Brands

      We proudly carry top-performing motor manufacturers trusted across North America:

      • ABB / Baldor Reliance
      • Worldwide Electric / North American
      • Teco-Westinghouse
      • Regal Beloit: Leeson, Marathon, Century, Fasco, Lincoln
      • US Motors / Nidec
      • GE
      • WEG
      • Toshiba
      • Hyundai
      • SEW Eurodrive

      🧭 Use our Master Product Search to filter by horsepower, frame, RPM, voltage, enclosure, and more.

      Serving Delaware & the Mid-Atlantic Region

      Square One Electric’s repair service serves customers across Delaware, Pennsylvania, Maryland, and New Jersey .

      Explore our Services Page for more information

      🔧 Schedule motor repair or maintenance service now