3-Phase Electric Motor 15kW 20Hp

The 3-phase electric motor is one of the product lines belonging to the high-performance 3-phase electric motor segment above 3.7kW, designed to meet the demands of heavy industries and production lines requiring large capacities.

With a power of 15kW (20Hp), this 3-Phase Motor 15kW provides stable, powerful, and energy-saving working performance. The motor is manufactured with advanced German technology, not only saving electricity but also featuring high durability, withstanding harsh working conditions, and ensuring safety throughout operation.

Design Overview of the 3-Phase Electric Motor 15kW 20Hp

The 3-phase electric motor features a durable structure designed to ensure optimal load-bearing capacity in industrial applications. The motor housing is typically manufactured from solid cast aluminum or cast iron, helping with rapid heat dissipation and corrosion resistance.

With its characteristic dark blue electrostatic paint coating, this motor not only protects against oxidation but also creates aesthetic appeal for the product. The cooling fan is integrated at the rear of the motor, helping to maintain a stable temperature during continuous operation.

Internal Structure of the 3-Phase Electric Motor 15kW 20Hp

To maintain durable and continuous operation under the 15kW power level, every component constituting the interior of the motor is selected from the strictest engineering materials:

• Stator: The stator core is tightly pressed from thousands of electrical steel sheets with extremely low core loss. The internal winding uses 100% pure copper wire, impregnated with vacuum insulating varnish (Class F) to withstand temperatures up to 155°C without electrical discharge.
• Rotor: The cast-aluminum squirrel-cage rotor integrates pure aluminum alloy conductor bars. The rotor passes through a digital dynamic balancing system to completely eliminate mass imbalance, helping the shaft rotate extremely smoothly.
• Bearings: Fixed in the front and rear end shields to center the rotating shaft. Industrial bearing brands with high friction resistance and heavy load capacity are typically used, equipped with dust seals and specialized heat-resistant grease.
• Cooling system: A large cross-section centrifugal cooling fan made of heavy-duty plastic or alloy, mounted at the rear of the rotating shaft and safely protected by a perforated steel ventilation cover.

What Types of 3-Phase Electric Motor 15kW 20Hp Are There?

The 3-phase 15kW 20Hp motor line is divided into 4 characteristic speed segments to be compatible with gearboxes and accurately meet the transmission needs of various machinery. Below are the detailed standard specifications for each type:

3-Phase Motor 15kW 20Hp 2 Poles (2,800 – 3,000 rpm)

This is the segment prioritizing ultra-fast speed, specialized for manufacturing equipment requiring high revolutions per minute to generate extremely strong liquid and gas pressure and flow rate.

Technical specifications:

Model	160M
Shaft diameter	42mm
Keyway	12mm
Flange diameter	350mm
Weight	120kg
Dimensions	615 x 330 x 420 mm
Installation type	Foot mount (B3), Flange mount (B35, B5, B14)
Protection class	IP55
Insulation class	Class F

Practical applications:

• Centrifugal pump stations: Driving large-capacity water pump ends for city clean water supply stations, farm irrigation, or cooling tower circulation pumps.
• High-pressure exhaust fan systems: Operating corridor smoke extraction fans and large-capacity oxygen air blowers for industrial wastewater treatment systems.
• Mechanical sawing and cutting machines: Providing high rpm speed for large industrial wood saws and scrap metal cutting machines.

3-Phase Motor 15kW 20Hp 4 Poles (1,400 – 1,500 rpm)

Being the most popular line on the market, it offers a perfect balance between smooth rotational speed and torque, operating very durably with minimal localized heat generation.

Technical specifications:

Model	160L
Shaft diameter	42mm
Keyway	12mm
Flange diameter	350mm
Weight	120kg
Dimensions	670 x 330 x 420 mm
Installation type	Foot mount (B3), Flange mount (B35, B5, B14)
Protection class	IP55
Insulation class	Class F

Practical applications:

• Pneumatic equipment: Driving 20Hp screw air compressor heads, providing stable compressed air for textile and mechanical factories.
• Industrial conveyor systems: Driving goods sorting conveyor systems, PVC conveyors, and roller conveyors in cement, animal feed, and fertilizer plants.
• Extruders and food processing machines: Operating recycled plastic extruders, large-capacity pellet mills, or animal feed crushing machines.

3-Phase Motor 15kW 20Hp 6 Poles (900 – 1,000 rpm)

Designed with more winding coils to lower rotational speed, the 6-pole line generates extremely large pulling force (torque) to handle continuous heavy-drag load challenges.

Technical specifications:

Model	180L
Shaft diameter	48mm
Keyway	14mm
Flange diameter	350mm
Weight	160kg
Dimensions	740 x 380 x 455 mm
Installation type	Foot mount (B3), Flange mount (B35, B5, B14)
Protection class	IP55
Insulation class	Class F

Practical applications:

• Coarse crushing and shredding machines: Operating wood chip chippers and small to medium jaw stone crushers without rpm drop under continuous feeding.
• Concrete batching plants and bucket elevators: Driving large-capacity concrete mixing drums and elevator systems to lift cement, stone, and gravel into high silos.
• Industrial agitators: Providing power for agitator blades in viscous chemical storage tanks, paint mixing tanks, or thousands-of-liters fertilizer tanks.

3-Phase Motor 15kW 20Hp 8 Poles (700 – 750 rpm)

Ultra-slow rotation speed but the highest starting pulling force. The frame code is enlarged (code 200L) to handle heavy loads right from startup without burning the windings.

Technical specifications:

Model	200L
Shaft diameter	55mm
Keyway	16mm
Flange diameter	400mm
Weight	200kg
Dimensions	770 x 420 x 505 mm
Installation type	Foot mount (B3), Flange mount (B35, B5, B14)
Protection class	IP55
Insulation class	Class F

Practical applications:

• Winch systems: Operating crane mechanisms and cable winches for lifting construction materials that require absolute slowness and safety.
• Rotary mechanisms: Driving heavy-duty metal machining turntables that require ultra-slow rotation for precise cutting.
• Heavy load mixing: Installed in clay kneading machines for fired brick production and mining ore mixing tanks.

Which Gearbox Combinations Suit the 3-Phase Electric Motor 15kW 20Hp?

With large capacity and diverse shaft diameters (42mm, 48mm, 55mm), choosing a suitable gearbox for the 15kW motor requires a high Service Factor to prevent shaft breakage and gear chipping.

• Heavy-duty helical gearbox (R, S, K, F Series): This is the most durable and safest connection option. Large sizes such as R77, R87 or K77, K87 are typically used to drive industrial conveyors and bucket elevators.
• Cast iron worm gearbox: Compatible with large WPA, WPS, WPX sizes (such as size 135, 155, or 175) to withstand the powerful pulling force of shafts 42mm and above.
• Aluminum housing hollow shaft worm gearbox (NMRV): Can be combined with NMRV size 130 or 150 for tight spaces requiring fast heat dissipation and high aesthetics.
• Transmission via pulley, coupling: It is recommended to use double C-section pulleys (multi-groove) or heavy-duty rigid couplings to absorb mechanical shock forces during jam loads.

Guide to Wiring a 3-Phase Electric Motor

Before starting, you should refer to electric motor videos to clearly understand the structure and terminal positions, thereby operating more accurately and safely.

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. When opening the cover, you will see the internal terminal system. For common 3-phase motors, this area typically features 6 clearly labeled wire ends.

Step 2: Identify the terminals and 380V power supply

The wire ends are arranged in two rows. The bottom row, labeled U1, V1, W1, is the location used to supply input power to the motor.

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

Prepare 3 phase wires from the 380V power supply and proceed to connect them respectively to terminals U1, V1, W1. Ensure correct positioning for stable motor operation.

Important safety note:

Terminal lugs must be tightened to ensure good electrical contact, limiting electrical sparks that cause short circuits and fires. Do not connect power to the upper row of terminals (U2, V2, W2) as this may damage the motor windings.

Step 4: Completion and trial run

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

Following the correct procedure not only helps the system operate stably but also ensures safety throughout usage. Electric motor videos from Thanh Thai Motor will be a useful resource for your practical reference.

To learn more about products, quotations, and detailed instructions, you can access the video collection in the electric motor video category – which provides complete content directly executed by the technical 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