Explosion-proof Motor 3kW 4Hp

The explosion-proof motor has the ability to efficiently convert electrical energy into mechanical energy, helping equipment operate at maximum capacity in harsh industrial environments. With advantages of safety and durability, explosion-proof motors are increasingly trusted in flammable and explosive areas. Follow the article to better understand the Explosion-proof Motor 3kW 4Hp product.

Overall design of the Explosion-proof Motor 3kW 4Hp

The Explosion-proof Motor 3kW 4Hp is a product classified under explosion-proof motors below 3.7kW. Designed with a thick cast iron housing, this motor provides optimal protection for internal components, ensuring user safety.

This housing helps the electric motor withstand heavy impacts and ensures high durability in harsh working environments.

In particular, the explosion-proof motor is equipped with long, heat-resistant wires, helping it operate stably under high-temperature conditions. With the ability to resist electrical short circuits and ensure fire safety, this product is suitable for use in easily flammable and explosive environments.

Internal structure of the explosion-proof motor 3kW 4Hp

To maintain continuous operating performance at 3kW and ensure absolute safety in chemical or gas environments, all internal components of the motor must achieve explosion-proof certification.

• Stator: The stationary magnetic field core is pressed from low-loss technical steel laminations. Pure copper windings are coated with a thick insulation layer and impregnated with multi-layer Class F vacuum varnish to withstand high temperatures and completely prevent electrical discharge.
• Rotor: The sturdy solid-cast squirrel-cage rotating core has an extremely smooth machined surface and computer-based dynamic balancing to completely eliminate mechanical friction causing sparks inside the motor chamber.
• Bearing also known as ball bearing: Assembled with high-load bearings from leading global brands. The bearing system integrates multi-layer seals and non-flammable lubricating grease to prevent dust and gas from entering the shaft.
• Cooling system: The centrifugal cooling fan blade must be made of anti-static plastic or specialized aluminum alloy material to avoid generating static sparks when rubbing against the air.

What types of explosion-proof electric motors 3kW 4Hp are available?

The explosion-proof motor product line is manufactured with 4 different rotational speed segments, helping engineers easily match the drive characteristics of each industrial machine. Below are the standard specifications for each type:

Explosion-proof motor 3kW 4Hp 2 poles (2,800 – 3,000 rpm)

This line focuses on high speed, suitable for equipment requiring large flow in a short time.

Technical specifications:

Code	100L
Shaft diameter	28mm
Key	8mm
Flange diameter	250mm
Weight	27kg
Dimensions	385mm * 215mm * 270mm
Mounting type	Foot mount (B3), Flange mount (B35, B5, B14)
Protection class	IP55
Insulation class	Class F

Practical applications:

• Equipment operating centrifugal air compressors in industrial gas lines to ensure stable conveyance flow.
• Products supporting centrifugal pumps operating in explosive filling stations without generating high heat.
• Motors participating in boost ventilation systems to rapidly circulate air for mines to instantly release toxic hazards.

Explosion-proof motor 3kW 4Hp 4 poles (1,400 – 1,500 rpm)

This is the standard rotational speed, providing optimal balance between torque and mechanical durability for heavy-duty equipment.

Technical specifications:

Code	100L
Shaft diameter	28mm
Key	8mm
Flange diameter	250mm
Weight	29kg
Dimensions	385mm * 215mm * 270mm
Mounting type	Foot mount (B3), Flange mount (B35, B5, B14)
Protection class	IP55
Insulation class	Class F

Practical applications:

• Products driving conveyor belts transporting ore continuously in underground mines without worrying about short circuits.
• Motors used for screw air compressors in environments with high chemical vapor concentrations requiring absolute explosion safety.
• Equipment operating medium-scale industrial mixing machines in production workshops to maintain stable mixing force throughout the shift.

Explosion-proof motor 3kW 4Hp 6 poles (900 – 1,000 rpm)

This line is designed to generate extremely strong torque, serving equipment with large loads and high inertia.

Technical specifications:

Code	132S
Shaft diameter	38mm
Key	10mm
Flange diameter	300mm
Weight	29kg
Dimensions	470mm * 275mm * 345mm
Mounting type	Foot mount (B3), Flange mount (B35, B5, B14)
Protection class	IP55
Insulation class	Class F

Practical applications:

• Recycled plastic pellet shredder systems in areas with potential high dust explosion risks.
• Screw conveyors feeding bulk materials into small hoppers in material manufacturing plants.
• Medium-concentration chemical tank agitators.

Explosion-proof motor 3kW 4Hp 8 poles (700 – 750 rpm)

The ultra-slow rotation speed helps maximize initial twisting force, ensuring safe startup for load mechanisms.

Technical specifications:

Code	132M
Shaft diameter	38mm
Key	10mm
Flange diameter	300mm
Weight	29kg
Dimensions	510mm * 275mm * 345mm
Mounting type	Foot mount (B3), Flange mount (B35, B5, B14)
Protection class	IP55
Insulation class	Class F

Practical applications:

• Lightweight cargo winches requiring extremely slow and careful hoisting and lowering speeds.
• Machined part turntable tables in electroplating or electrostatic painting workshops.
• Slow-rotating feeding mechanisms at hazardous industrial waste incinerators.

Which gearbox does the Explosion-proof Motor 3kW 4Hp combine with?

To transmit kinetic energy most effectively, the 3kW device needs to be paired with high safety factor gearboxes to prevent overloading that causes gear cracking or breakage.

• Helical gear heavy duty gearbox: This method provides excellent mechanical durability. Users often prioritize specialized oil-immersed R37, R47 or K37, K47 models to drive conveyors.
• Worm gear hollow shaft gearbox: This equipment is very suitable when assembled with WPA, WPS size 70 or 80 models to serve basic hoisting mechanisms.
• Drive coupling: It is recommended to use flanged couplings or explosion-proof hydraulic couplings to limit spark risks caused by direct metal friction.

Wiring instructions for explosion-proof motors

To wire safely and according to procedure, follow these 5 steps:

Step 1: Disconnect power and survey

Turn off the circuit breaker to disconnect all mains power. Refer to the electric motor video along with reading the nameplate on the machine body. This helps you finalize the exact voltage level and select the correct cable size.

Step 2: Open the terminal box

Take the wrench tool to open the protective cover embossed with the letter “EX”. When lifting the cover off, absolutely do not tear or displace the rubber gasket located at the terminal box edge.

Step 3: Identify terminal pins

Looking inside the box, find 3 copper terminal pins engraved with the letters U, V, W. Compare with the actual power source to check whether the copper bars are connected in a star or delta configuration.

Step 4: Connect cables and grounding

Crimp terminals for the power cables and fix them securely to the 3 terminals U, V, W. Tighten the nuts firmly to completely eliminate the risk of sparking. Finally, attach an extra wire to the grounding terminal.

Step 5: Reinstall the protective cover

Place the terminal box cover back to its original position tightly against the rubber gasket, tightening the bolts evenly at all corners. To refer to wiring diagrams for other industrial machine models, watch the summary videos on the Thanh Thai Motor channel.

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