3-Phase Electric Motor 4.0kW 5.5Hp

The 3-Phase Electric Motor 4.0kW 5.5Hp is a medium-capacity product line, specially used for industrial machinery systems operating continuously and requiring high stability. With powerful operation, energy saving, and outstanding durability, this 3-Phase Motor 4kW is commonly applied in fields such as wood processing, mechanics, production lines, conveyors, industrial pumps, etc. Modern design, manufactured according to German technological standards, helps ensure optimal performance under all operating conditions.

Overview design of the 3-Phase Electric Motor 4.0kW 5.5Hp

The 3-phase electric motor is solidly designed with a monolithic cast iron or cast aluminum outer housing, increasing durability and efficient heat dissipation. The motor has balanced dimensions, suitable for installation in various industrial machinery and spaces. The motor shaft is made of stainless steel, durable over time and with good corrosion resistance. The rear of the motor is equipped with a cooling fan to help maintain a stable temperature during long-term operation.

Internal Structure of the Electric Motor

To maintain continuous and stable operation at a capacity of 4.0kW, the device is composed of materials and assemblies meeting international industrial standards:

• Stator: The stationary magnetic armature, assembled from electrical steel sheets with high magnetic permeability. The internal winding uses 100% pure copper wire, coated with multiple layers of heat-resistant varnish (Class F) to prevent electrical discharge during operation.
• Rotor: The squirrel-cage core rotating inside the stator magnetic field, cast with aluminum or copper alloy conductors. The dynamic balancing process helps the rotor spin extremely smoothly, eliminating runout phenomena that harm the machine shaft.
• Bearings: Installed at both ends of the flange to fix the shaft, typically using high-friction industrial bearings integrated with dust seals and specialized lubricating grease.
• Cooling system: A plastic or alloy centrifugal cooling fan attached to the rear of the shaft, continuously circulating cool air and protected by a perforated steel cover.

What are the types of 3-Phase Electric Motor 4.0kW 5.5Hp?

The 3-phase motor line is distributed with 4 different speed ranges, helping users easily select equipment suitable for each transmission mechanism. Below are detailed technical specifications for each segment:

3-phase motor 4.0kW 5.5Hp 2 poles (2,800 – 3,000 rpm)

As a speed-optimized version, it provides extremely high rotational speed to serve equipment requiring high flow rates and working pressures while the load is not overly heavy.

Technical specifications:

Code	112M
Shaft diameter	28mm
Keyway	8mm
Flange diameter	250mm
Weight	35kg
Dimensions	400 x 240 x 300 mm
Mounting type	Foot mount (B3), Flange mount (B35, B5, B14)
Protection class	IP55
Insulation class	Class F

Practical applications:

• Water supply pump system: Drives a 5.5Hp centrifugal pump head for apartment water supply, automatic sprinkler irrigation for farms.
• Ventilation & Aeration fans: Operates industrial smoke extraction fans, shrimp pond air blowers to create bottom oxygen.
• Mechanical machining: Provides fast RPM for the saw blades of large sliding table wood saws, industrial aluminum profile metal cutters.

3-phase motor 4.0kW 5.5Hp 4 poles (1,400 – 1,500 rpm)

This is the most popular and best-selling variant, providing an excellent balance between rotational speed and torque, running very quietly and durably.

Technical specifications:

Code	112M
Shaft diameter	28mm
Keyway	8mm
Flange diameter	250mm
Weight	35kg
Dimensions	400 x 240 x 300 mm
Mounting type	Foot mount (B3), Flange mount (B35, B5, B14)
Protection class	IP55
Insulation class	Class F

Practical applications:

• Agricultural equipment: Drives large-capacity rice milling machines, corn grinders, grass cutters, poultry feather pluckers at farm scale.
• Conveyor systems: Drives packaging conveyor lines, scrap or agricultural product transport conveyors.
• Washing & air compressor pumps: Runs professional high-pressure spray heads, large 3-piston air compressor heads.

3-phase motor 4.0kW 5.5Hp 6 poles (900 – 1,000 rpm)

With a slower rotational speed due to the windings designed with more magnetic poles, the 6-pole line is capable of generating very strong torque to drive heavy-load machines. The motor housing frame is also designed larger.

Technical specifications:

Code	132M
Shaft diameter	38mm
Keyway	10mm
Flange diameter	300mm
Weight	52kg
Dimensions	510 x 275 x 345 mm
Mounting type	Foot mount (B3), Flange mount (B35, B5, B14)
Protection class	IP55
Insulation class	Class F

Practical applications:

• Mixing tanks: Provides strong torque to stir paint solutions, thick chemicals, biogas cellar tanks.
• Screw conveyors & bucket elevators: Operates screw conveyor shafts to feed animal feed, cement into silos without stalling.
• Coarse crushers: Applied in wood chippers, scrap waste shredders, or aquatic feed pellet presses.

3-phase motor 4.0kW 5.5Hp 8 poles (700 – 750 rpm)

Possessing an extremely slow rotational speed, the 8-pole line focuses 100% of its power on initial pulling force. The frame code is maximized to handle heavy loads right from startup.

Technical specifications:

Code	160M
Shaft diameter	42mm
Keyway	12mm
Flange diameter	350mm
Weight	75kg
Dimensions	615 x 330 x 420 mm
Mounting type	Foot mount (B3), Flange mount (B35, B5, B14)
Protection class	IP55
Insulation class	Class F

Practical applications:

• Winch systems: Operates crane mechanisms, cable hoists for lifting construction materials requiring absolute slowness and safety.
• Slewing mechanisms: Drives heavy-load metal machining turntables requiring ultra-slow rotation for precise cutting.
• Heavy-duty agitation: Installed in clay kneading machines for fired brick production, mineral ore mixing tanks.

Which gearbox can the 3-Phase Electric Motor 4.0kW 5.5Hp be combined with?

Thanks to possessing various diverse shaft standards (28mm, 38mm, 42mm), the 4.0kW 5.5Hp motor provides extremely flexible coupling capabilities with most gearboxes available on the market:

• Cast iron worm gearbox: Prioritized for combination with WPA, WPS, WPX sizes 100, 120 (for 28mm shaft) or size 135 (for 38mm shaft).
• Aluminum housing worm gearbox (NMRV worm gearbox): Suitable for NMRV sizes 090, 110, or 130, applied in spaces requiring lightweight, corrosion resistance, and high aesthetics.
• Specialized heavy-duty gearbox: R, S, K, F series are the number one choice for automated conveyor systems requiring non-stop 24/7 operation.
• Other transmission accessories: Highly compatible with pulley systems (usually double B or C type), roller chains, and plum couplings (jaw couplings).

Instructions for wiring a 3-phase electric motor

Before performing, you should refer to the electric motor videos to clearly understand the structure and location of terminal posts, making the operation process more accurate and safer.

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

Use a suitable screwdriver to remove the 4 fixing bolts on the terminal box cover. After opening the cover, you will observe the wiring terminals inside. With a common 3-phase motor, this area typically has 6 clearly marked wire ends.

Step 2: Identify the terminal posts and 380V power supply

The wire ends in the terminal box are usually arranged in two rows. The bottom row, labeled U1, V1, W1, is the position used to supply the input power.

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

Prepare 3 phase wires from the 380V power source and connect them respectively to terminals U1, V1, W1. Ensure correct positioning for the motor to operate stably.

Important safety note:

Cable lugs must be tightly fastened to ensure good electrical contact, avoiding electrical sparks causing short circuits. Do not connect power to the upper terminal row (U2, V2, W2) as this may damage the motor windings.

Step 4: Close the cover and test run

After completing the wiring, close the terminal box cover tightly and secure the bolts to protect the device from dust and moisture. Power on to check operation. If the motor rotates in reverse, simply disconnect the power and swap the positions of two out of the three phase wires to reverse the rotation direction.

Proper technical execution not only helps the system operate stably but also ensures long-term safety. Electric motor videos from Thanh Thai Motor will be a useful reference source during practical use.

To learn more about products, quotations, and detailed instructions, you can access the comprehensive video section in the electric motor video category – where full content directly implemented by the technical team is compiled.

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