3-Phase Electric Motor 3.7kW 5Hp

The 3-Phase Electric Motor 3.7kW 5Hp is an electric motor used in small and medium industrial systems that require continuous operation with high efficiency. Its powerful capacity combined with a sturdy design helps the 3-phase electric motor operate stably and save energy, making it suitable for conveyor lines, pumps, crushers, processing machines, air conditioning systems, and many other applications.

General Design of the 3-Phase Electric Motor 3.7kW 5Hp

The 3-Phase Electric Motor 3.7kW 5Hp is crafted from solid cast iron or cast aluminum, offering high durability and good heat dissipation. The shaft is made of stainless steel, finely machined and corrosion-resistant. The outer casing is powder-coated to protect against weather and chemicals. At the rear of the motor, there is a cooling fan to maintain stable temperatures when operating under high loads.

Internal Construction of the Motor

The 3-Phase Electric Motor 3.7kW 5Hp is optimized with standard construction. Key internal components include:

• Stator: The stationary outer part, made of a laminated steel core with windings made of 100% copper wire. When 3-phase power is applied to the stator, it generates a rotating magnetic field to start and maintain the rotor’s movement.
• Rotor: This component rotates according to the stator’s magnetic field, generating smooth rotational torque.
• Motor Housing: Made from solid cast iron or cast aluminum meeting material standards, featuring cooling fins and end shields on both sides. This housing protects the stator and rotor, assists in effective heat dissipation, and prevents dust and moisture ingress.
• Bearings: Fitted at both ends of the shaft to keep the rotor spinning stably and reduce friction. High-quality bearings ensure quiet motor operation, minimize vibration, and extend the motor’s lifespan.
• Cooling Fan: Located on the rear shaft, rotating alongside the rotor. When the motor runs, the fan draws air through the cooling fins on the housing, blowing it outward for continuous heat dissipation to prevent overheating.

What are the types of 3-Phase Electric Motor 3.7kW 5Hp?

Based on rotational speed, the 3-Phase Electric Motor 3.7kW 5Hp is classified into the following 4 types:

3-Phase Motor 3.7kW 5Hp 2-Pole (2,800 – 3,000 rpm)

Extremely high rotational speed but low starting torque. Direct load holding force is not as strong as lower-speed series.

Technical Specifications

Model	112M
Shaft Diameter	28mm
Keyway	8
Flange Diameter	250mm
Weight	34kg
Dimensions	400 * 230mm * 290mm
Mounting Type	Foot-mounted (B3), Flange-mounted (B35, B5, B14)
Protection Class	IP55
Insulation Class	Class F

Applications

• Centrifugal Water Pumps, Vertical Pumps: The high-speed 5Hp capacity is specialized for high-rise water supply systems, fire pumps, or irrigation pumping stations requiring high discharge pressure over distance and height.
• Industrial Centrifugal Exhaust Fans, Stairwell Booster Fans: Require high speed to generate large airflow and wind pressure to extract workshop dust or ventilate mines.
• Metal Cutting Machines, Grinders, Mechanical Wood Planers: Blank cutting machines require high blade rotational speeds for clean material cutting, needing fast progress rather than heavy pulling force.

3-Phase Motor 3.7kW 5Hp 4-Pole (1,400 – 1,500 rpm)

This is the most popular motor series (accounting for 70-80% of the market) due to its perfect balance between speed and pulling force, smooth operation, high mechanical durability, and lower heat generation compared to the 2-pole series.

Technical Specifications

Model	112M
Shaft Diameter	28mm
Keyway	8
Flange Diameter	250mm
Weight	41kg
Dimensions	470mm * 260mm * 338mm
Mounting Type	Foot-mounted (B3), Flange-mounted (B35, B5, B14)
Protection Class	IP55
Insulation Class	Class F

Applications:

• High-Pressure Car Wash Pump Heads, Industrial Fog Sprayers: Directly coupled with piston pump heads (such as ceramic plunger heads) to run car wash shops and workshops.
• Piston Air Compressors: The 5Hp 1450 rpm capacity specializes in driving 2-piston or 3-piston compressor heads onto air tanks ranging from 150 liters to 300 liters to serve repair shops and auto garages.
• Flat Conveyors, Belt Conveyors: Combined with a gearbox (such as size 80, size 100) to drive goods and packaging conveyors in food and agricultural processing plants.
• Agricultural Processing Machines: Used to drive rice threshers, corn crushers, and rice milling machines for individual business households.

3-Phase Motor 3.7kW 5Hp 6-Pole (900 – 1,000 rpm)

Extremely powerful pulling force (torque) right from startup. Able to withstand heavy loads and harsh working environments.

Technical Specifications

Model	132M
Shaft Diameter	38mm
Keyway	10
Flange Diameter	300mm
Weight	50kg
Dimensions	510mm * 260mm * 338mm
Mounting Type	Foot-mounted (B3), Flange-mounted (B35, B5, B14)
Protection Class	IP55
Insulation Class	Class F

Applications:

• Chemical Stirrers, Paint Mixers, Shrimp Pond Agitators: The slow speed helps agitators evenly mix thick, viscous solutions (or aeration water) without breaking blades or overloading the motor windings.
• Screw Conveyors, Heavy Material Bucket Elevators: Specialized for transporting heavy, high-friction materials such as cement, fly ash, sand, stone, and bagged agricultural products upward.
• Large Animal Feed Crushers: Drives heavy-duty hammer mill systems requiring the motor not to experience voltage drops or sudden stops when feeding raw materials into the machine.

3-Phase Motor 3.7kW 5Hp 8-Pole (700 – 750 rpm)

A specialized motor series for ultra-heavy loads. The largest pulling force among the 4 types, but with a very slow rotational speed. It typically has a much larger and heavier frame size compared to other series with the same 5Hp capacity.

Technical Specifications

Model	160M
Shaft Diameter	42mm
Keyway	12
Flange Diameter	350mm
Weight (demo)	50kg
Dimensions (demo)	510mm * 260mm * 338mm
Mounting Type	Foot-mounted (B3), Flange-mounted (B35, B5, B14)
Protection Class	IP55
Insulation Class	Class F

Applications

• Hoisting Systems, Heavy Cargo Lifting Winches: Require extremely large initial holding and pulling force to lift the load platform safely without load slippage.
• Hydraulic Presses, Industrial Hydraulic Power Units: Used to drive high-pressure Hydraulic Pump lines serving stamping machines and sheet metal press brakes.
• Concrete Mixing Equipment, Scrap Shredders: Fitted for large construction concrete mixing drums or tire shredders, industrial waste shredders – places requiring crushing force for hard materials rather than high speed.

What gearboxes can the 3-Phase Electric Motor 3.7kW 5Hp be combined with?

The 3-Phase Electric Motor 3.7kW 5Hp can be combined with various types of Gearbox such:

• Worm Gearbox: WPS, WPX, WPO, WPA, WPDS, WPDX, WPD0, WPDA size 120 and NMRV 110, 130 gearboxes.
• Heavy Duty Gearbox: R-Series Inline Helical Gearbox, S-Series Helical Worm Gearbox, F-Series Parallel Shaft Helical Gearbox.

Additionally, it can be combined with:

• Pulley and Coupling: Shafts 28mm, 38mm, 42mm.
• Brake: 4kW 5.5Hp brake.

Instructions for Wiring a 3-Phase Electric Motor

Step 1: Remove the terminal box cover of the electric motor

• Use a suitable screwdriver to loosen and remove the 4 positioning screws on the terminal box cover.
• Lift the cover off, and you will see the terminal block system inside. For standard 3-phase electric motors, there will be 6 terminal leads arranged with clear markings.

Step 2: Identify the connection terminals and the 380V power supply

• Observe inside the terminal box, the wire ends are divided into two rows (similar to the structure in the tutorial video).
• Focus on the lower row of terminals, usually labeled as U1, V1, W1. This is the connection area for the input power supply.

Step 3: Connect the 3-phase power supply to terminals U1, V1, W1

• Prepare 3 phase wires of the 380V 3-phase power supply.
• Proceed to connect each power wire to the 3 corresponding positions: U1, V1, and W1.

IMPORTANT SAFETY NOTE:

• Crimp terminals (lugs) must be tightened securely to ensure good electrical contact. Loose connections can easily lead to arcing, causing short circuits, burning, and equipment damage.
• Absolutely do not connect these three power wires to the upper row of terminals (U2, V2, W2) to avoid the risk of burning the motor windings.

Step 4: Close the protective cover and supply power for trial operation

• After completing the wiring, close the terminal box cover and tighten the 4 fixing screws to prevent dust and water ingress.
• Turn on the power to check the rotation direction of the motor. In case the motor rotates in the reverse direction, simply disconnect the power and swap the positions of 2 out of the 3 phase wires, and the motor shaft will automatically reverse direction.

Following the correct procedure and mastering the wiring technique not only helps you be proactive during installation but is also a core factor in protecting the safety of the machinery system. The professional video tutorial series from Thanh Thai Motor is always here to support customers in operating various motor lines safely and optimally.

If customers wish to know more general information about products distributed at Thanh Thai Motor, please visit the comprehensive video page under the electric motor video category, which provides product introduction videos, quotes, and instructions directly produced by our team.

Warranty, shipping and commitment policy at Thanh Thai Motor

Warranty up to 24 months

All electric motor products distributed by Thanh Thai Motor are covered by a genuine warranty for up to 24 months. Customers who purchase electric motors can completely rest assured with a transparent, fast, and professional after-sales policy.

Nationwide Shipping

Thanh Thai Motor supports nationwide shipping for all electric motors sold, ensuring safe and on-time delivery to every province across the country. Whether you are in the North, Central, or South, we are ready to serve you.

European Standard Quality – German Technology

Thanh Thai Motor sells electric motors manufactured with German technology, meeting European quality standards, ensuring durability, high efficiency, and stable operation for a long period – suitable for the strict requirements of industrial electric motors.

Competitive Prices – Attractive Offers for Dealers and Wholesale Customers

We commit to reasonable motor prices, offering the best electric motor products with high discount policies for bulk purchasers and distribution units. The more you buy – the better the profit.

Quality Commitment – Powerful Operation, Power Saving

Thanh Thai Motor sells electric motors wound with 100% copper wire, helping the machine run powerfully, consume less electricity, operate smoothly, and effectively reduce vibration – extending equipment lifespan. When purchasing an electric motor, prioritizing products with 100% copper core will be a wise decision, bringing long-term value.

At Thanh Thai Motor, we provide a full range of products, with various phases and capacities, such as:

• 220V electric motors (or 220V 1-Phase electric motors) are 1-Phase electric motors commonly chosen for many household appliances and light industrial equipment, offering convenience and efficiency.
• 380V electric motors are 3-Phase electric motors using three-phase power, commonly used in heavy industrial applications.

Full CO, CQ Certification Documents

Thanh Thai Motor provides the best quality electric motors. Each imported electric motor product from Thanh Thai Motor comes with a Certificate of Origin (CO) and a Certificate of Quality (CQ), meeting the requirements for large projects, constructions, and strict technical documentation.

Contact for Purchase

Do you need to buy an electric motor or seek advice on choosing an affordable electric motor that suits your needs? Contact Thanh Thai Motor immediately using the methods below:

• WhatsApp: +84966596219
• Email: codienthanhthai@gmail.com