WEG 3018K391 Tefc Phase Induction Motor Ac Rpm 0.75 208/230/460V 3450

( Brand: Weg ), ( Manufacturer Part Number: 3018K391 ), ( Model: 30303 ), ( Part Type: Ac Hp Motor ), ( Actual Rated Input Voltage: 208 V, 230 V, 460 V ), ( Full Load Amps: 2.1/2.0/1.0 ), ( Rated Load: Hp ), ( Ac Frequency Rating: 60 Hz ), ( Enclosure Type: Tefc ), ( Base Rpm: 3450 ), ( Ac Motor Type: Induction/asynchronous ), ( Mounting Type: Base-mounted ), ( Current Type: Ac ), ( Protection Against Liquids: Water Jets ), ( Ip Rating: Ip55 ), ( Service Factor: 1.15 ), ( Ac Phase: Three Phase ), ( Protection Against Solids: Most Wires And Screws )

Review WEG 0.75 Hp Tefc Three Phase Induction Motor 208/230/460v Ac Rpm

The **WEG 3018K391** is a robust, high-performance **0.75 horsepower (HP) Totally Enclosed Fan-Cooled (TEFC) three-phase induction motor**, engineered to deliver reliable and efficient operation across a wide range of industrial and commercial applications. Designed with WEG s signature precision and durability, this motor is built to meet stringent performance standards while offering exceptional energy efficiency and long-term operational reliability. Operating at a nominal speed of **3,450 RPM**, it is ideal for applications requiring moderate torque and consistent rotational speed, such as conveyor systems, pumps, compressors, fans, and light-duty machinery. The motor s **dual-voltage capability (208V, 230V, and 460V)** provides flexibility for integration into various electrical systems, ensuring compatibility with different power infrastructures without compromising performance.

Constructed with a **Totally Enclosed Fan-Cooled (TEFC) design**, the WEG 3018K391 ensures superior protection against dust, moisture, and corrosive environments, making it suitable for both indoor and outdoor installations where exposure to harsh conditions is a concern. The fan-cooled enclosure maintains optimal operating temperatures by dissipating heat efficiently, thereby extending the motor s lifespan and reducing the risk of overheating. Its compact yet sturdy **NEMA Premium efficiency rating** further enhances its appeal, as it consumes less power while delivering the same or better performance compared to standard motors, contributing to lower operational costs and a reduced environmental footprint.

The motor s **high-quality windings**, constructed with premium-grade insulation materials, provide enhanced resistance to electrical and mechanical stress, ensuring extended service life even under demanding operating conditions. The robust shaft design, coupled with precision bearings, minimizes vibration and wear, resulting in smoother operation and reduced maintenance requirements. Additionally, WEG s advanced manufacturing processes ensure tight tolerances and superior balance, which translates to quieter operation and greater reliability over time. Whether integrated into a production line, HVAC system, or material handling equipment, the **WEG 3018K391** delivers consistent performance with minimal downtime, making it a dependable choice for applications where efficiency, durability, and adaptability are paramount.

### **Pros and Cons of buying a Weg 3018K391 (0.75 HP, TEFC, Phase Induction Motor, 208/230/460V, 3450 RPM)**

1. **Reliability and Durability** Weg is a well-known brand in industrial motors, known for producing high-quality, long-lasting equipment. The TEFC (Totally Enclosed Fan-Cooled) design protects the motor from dust, moisture, and contaminants, making it suitable for harsh environments.

2. **Wide Voltage Range (208/230/460V)** The motor s compatibility with multiple voltage levels (single-phase and three-phase) provides flexibility for different electrical setups, reducing the need for additional voltage converters.

3. **High RPM (3450 RPM)** The motor s speed is well-suited for applications requiring fast rotation, such as pumps, compressors, fans, and small machinery where efficiency and quick operation are critical.

4. **0.75 HP Capacity** This motor is ideal for light to medium-duty applications, making it cost-effective for small industrial, commercial, or residential uses where a larger motor would be unnecessary.

5. **Energy Efficiency** As an induction motor, it is generally energy-efficient compared to older motor technologies, though newer premium efficiency models may offer better performance.

6. **Easy Maintenance** The TEFC design reduces the need for frequent lubrication and cooling adjustments, simplifying upkeep.

7. **Compatibility with Standard Drives** The motor can be paired with variable frequency drives (VFDs) if adjustable speed control is required, though this may require additional components.

8. **Affordable Cost** Compared to premium or custom-built motors, this model offers a balance between performance and price, making it a budget-friendly option for many applications.

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1. **Limited Power for Heavy Loads** At only 0.75 HP, this motor may struggle with continuous heavy-duty tasks, such as high-capacity pumps, large compressors, or machinery requiring sustained high torque.

2. **No Premium Efficiency Rating** While induction motors are generally efficient, this model may not meet the latest energy-saving standards (e.g., NEMA Premium or IE3/IE4 ratings), which could lead to higher long-term energy costs.

3. **Dependence on External Cooling** Although TEFC motors are enclosed, they still rely on a fan for cooling, which may require periodic maintenance to ensure optimal performance.

4. **Potential Noise and Vibration** Induction motors can generate some noise and vibration, which may be noticeable in sensitive environments or applications requiring silent operation.

5. **Limited Customization** This is a standard off-the-shelf motor, meaning users cannot modify specifications such as shaft length, mounting configuration, or enclosure type without additional parts.

6. **Sensitivity to Voltage Fluctuations** Like most induction motors, it may experience reduced efficiency or overheating if subjected to frequent voltage spikes or drops, requiring stable power supply conditions.

7. **No Built-in Protection Against Overload** While TEFC motors are robust, they lack built-in overload protection (unless paired with a separate overload relay), which could lead to damage if overloaded.

8. **Potential Lead Time for Replacement Parts** As an older or widely available model, finding replacement parts or exact matches may take longer than for newer or specialized motors.

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### **Conclusion**

The **Weg 3018K391 (0.75 HP, TEFC, 3450 RPM)** is a **practical and cost-effective choice** for light to medium-duty applications where reliability, durability, and flexibility in voltage compatibility are priorities. It excels in environments with dust, moisture, or temperature variations due to its TEFC design and is well-suited for small machinery, pumps, fans, or compressors where 0.75 HP is sufficient.

However, it is **not ideal for heavy-duty or high-torque applications**, nor does it offer the energy savings of premium efficiency models. Users should ensure their power supply is stable and that the motor is appropriately sized for the load to avoid premature wear or failure.

### **Recommendation**

- You need a **reliable, enclosed motor** for light to medium-duty use (e.g., small pumps, fans, or machinery).

- Your application requires **flexibility in voltage input (208/230/460V)**.

- You operate in **dirty or humid environments** where protection from contaminants is necessary.

- Budget constraints make a premium motor impractical, but you still need a **durable, long-lasting solution**.

- Your application demands **higher power (e.g., 1 HP or more)** or **continuous heavy loads**.

- You require **premium efficiency** to reduce energy costs over time.

- Noise or vibration is a concern (a **premium efficiency or IE3/IE4 motor** may be quieter).

- You need **custom features** (e.g., extended shaft, special mounting, or built-in protection).

For most **general-purpose, low-to-medium load applications**, this Weg motor is a **solid, cost-effective choice**. However, for **high-performance or energy-sensitive operations**, investing in a slightly more advanced model may be justified. Always verify the **actual load requirements** and **operating conditions** before purchasing to ensure optimal performance.

Details:

WEG 0.75 HP TEFC Three Phase Induction Motor 208/230/460V AC 3450 RPM.

part #: 3018k391 prices

• $289.00-$389.00

specifications oelemot:

• brand: Weg
• mpn: 3018k391
• model: 30303
• part type: Ac Hp Motor
• actual rated input voltage: 208 V, 230 V, 460 V
• full load amps: 2.1/2.0/1.0
• rated load: Hp
• ac frequency rating: 60 Hz
• enclosure type: Tefc
• base rpm: 3450
• ac motor type: Induction/asynchronous
• mounting type: Base-mounted
• current type: Ac
• protection against liquids: Water Jets
• ip rating: Ip55
• service factor: 1.15
• ac phase: Three Phase
• protection against solids: Most Wires And Screws

returns oelemot:

• policy: No Returns

payments oelemot:

• wallet: Paypal
• credit card: Visa
• other

shipping oelemot:

• cost: $66.56
• service: USPS Ground Advantage
• transit: 4-11 Days
• carrier: USPS
• class: Standard
• type: Calculated

offer oelemot:

• started: February 9, 2026
• sold: 0
• options: Ship-to-home
• availability: In Stock
• quantity: 1
• best offers: True

seller oelemot:

• # reviews: 0
• rating: 0.0%
• city: Utica, New York

general oelemot:

• Industrial Automation Motion Controls > Electric Motors > General Purpose Motors
• condition: Used

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