Explosion-proof Motor 5.5kW 7.5Hp

The Explosion-Proof Motor 5.5kW 7.5Hp is a device that safely converts electrical energy into mechanical energy, suitable for explosive environments. With a sturdy design and stable operation, the product is widely applied in many industries. Follow the article below to better understand the structure, advantages, and practical applications of this explosion-proof motor series!

General Design of the Explosion-Proof Motor 5.5kW 7.5Hp

As a product belonging to the explosion-proof motor segment above 3.7kW, the Explosion-Proof Motor 5.5kW 7.5Hp is designed to be sturdy and optimized for heavy industrial environments. The outer casing is made of thick, rigid cast iron, protecting internal components from external impacts and mechanical forces.

Inside, the motor uses large windings made of 100% copper, enhancing heat resistance and ensuring stable power transmission over long periods. In particular, the design of this electric motor is capable of preventing outbreaks if electrical sparks or short circuits occur, thereby ensuring absolute safety for operators and the surrounding environment.

This is an ideal choice for systems that need to operate continuously in environments with a high risk of explosion, such as: mines, oil and gas warehouses, chemical plants, or metallurgical workshops.

Internal Structure of the Explosion-Proof Motor 5.5kW 7.5Hp

To maintain continuous operation performance at 5.5kW and ensure absolute safety in chemical or gas environments, all internal components of the motor must achieve explosion-proof certification.

• Stator: A stationary magnetic field core pressed from low-loss electrical steel sheets. Pure copper windings are coated with a thick insulation layer, vacuum-impregnated with multi-layer Class F standard varnish to withstand high temperatures and completely prevent electrical discharge.
• Rotor: A sturdy, one-piece cast squirrel-cage rotating core, with an extremely smooth surface finish and computer dynamic balancing to completely eliminate mechanical friction that generates sparks inside the machine chamber.
• Bearing: Assembled using heavy-load bearings from leading global brands. The bearing system integrates multi-layer sealing seals and non-explosive lubricating grease to prevent dust and gas from entering the shaft core.
• Cooling system: The centrifugal cooling fan blade must be made of anti-static plastic or specialized aluminum alloy material so as not to generate static sparks when rubbing against the air.

What Types of Explosion-Proof Motors 5.5kW 7.5Hp Are Available?

The Explosion-Proof Motor 5.5kW 7.5Hp product line is manufactured with 4 different rotational speed segments, helping engineers easily match the transmission characteristics of each industrial machine. Below are the standard technical specifications for each type:

Explosion-Proof Motor 5.5kW 7.5Hp 2 Poles (2,800 – 3,000 rpm)

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

Technical Specifications:

Code	132S
Shaft diameter	38mm
Keyway	10
Flange diameter	300mm
Dimensions	470* 270mm * 345mm
Mounting type	Foot mount (B3), Flange mount (B35, B5, B14)
Protection class	IP55
Insulation class	Class F

Applications:

• Operating centrifugal compressor equipment in industrial gas pipelines to ensure stable conveying flow.
• Supporting centrifugal pumps operating in explosive filling station conditions without generating high heat.
• Participating in boost ventilation systems to quickly circulate air for mines to immediately release toxic elements.

Explosion-Proof Motor 5.5kW 7.5Hp 4 Poles (1,400 – 1,500 rpm)

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

Technical Specifications:

Code	132S
Shaft diameter	38mm
Keyway	10
Flange diameter	300mm
Dimensions	470* 270mm * 345mm
Mounting type	Foot mount (B3), Flange mount (B35, B5, B14)
Protection class	IP55
Insulation class	Class F

Applications:

• Driving conveyor belts to continuously transport mine ore in underground tunnels without worrying about electrical short-circuit incidents.
• Used for screw compressors in environments with high chemical vapor concentrations that require absolute explosion safety.
• Operating medium-scale industrial mixing machines in production workshops to maintain stable mixing force throughout the shift.

Explosion-Proof Motor 5.5kW 7.5Hp 6 Poles (900 – 1,000 rpm)

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

Technical Specifications:

Code	160M
Shaft diameter	42mm
Keyway	12mm
Flange diameter	350mm
Weight	110kg
Dimensions	615 x 315 x 410 mm
Mounting type	Foot mount (B3), Flange mount (B35, B5, B14)
Protection class	IP55
Insulation class	Class F

Applications:

• Ore crushers operating with heavy loads in flammable coal dust environments.
• Heavy-duty chain conveyors transporting raw ore from mining areas to storage yards.
• Elevator buckets lifting raw materials high at industrial chemical material mixing stations.
• Large-volume raw material mixers operating continuously in areas with high explosive dust concentrations.

Explosion-Proof Motor 5.5kW 7.5Hp 8 Poles (700 – 750 rpm)

The slowest speed, providing the largest starting torque, optimal for movements requiring high precision and strong thrust.

Technical Specifications:

Code	160L
Shaft diameter	42mm
Keyway	12mm
Flange diameter	350mm
Weight	125kg
Dimensions	670 x 315 x 410 mm
Mounting type	Foot mount (B3), Flange mount (B35, B5, B14)
Protection class	IP55
Insulation class	Class F

Applications:

• Cargo winching systems at mining ports helping to move heavy load materials with well-controlled speeds.
• Lifting mechanisms in ammunition or explosive material warehouses requiring high safety and slowness in each operation.
• Rotary kilns in industrial gas environments helping materials bake evenly thanks to slow rotation speed and strong pulling force.

Which Gearbox Does the Explosion-Proof Motor 5.5kW 7.5Hp Combine With?

Pairing the explosion-proof motor 5.5kW with drive equipment requires extremely strict safety factor calculations to ensure the gearbox is not broken under the pulling force of the 7.5Hp motor.

• Heavy-duty helical gearbox: This is the standard option. Usually uses large gearbox codes like R57, R67 or K57, K67 immersed completely in oil to pull mine conveyor systems.
• Hollow shaft worm gearbox: Can be paired with vertical worm gearboxes codes WPA, WPS size 100 or 120 used in medium-capacity mixing tanks.
• Drive coupling: It is mandatory to use hydraulic couplings or explosion-proof standard steel disc couplings for smooth startup, eliminating mechanical load shocks and preventing friction spark generation.

Explosion-Proof Motor Wiring Guide

Follow these 5 steps to ensure safety and technique:

Step 1: Check parameters

Watch the electric motor video to grasp the technical indicators and equipment structure in order to choose the correct power connection method.

Step 2: Open the terminal box

Use tools to remove the screws and lift the terminal box cover (the lid printed with “EX”) off the machine.

Step 3: Identify connection terminals

Find the 3 copper contact terminals labeled U, V, and W located inside the box.

Step 4: Connect power wires

Connect 3 power wires from the source to the 3 terminals U, V, and W. It is mandatory to tighten the screws at the contact points to prevent electric arcs.

Step 5: Completion

The basic wiring operation is done. View more wiring diagrams of other machine lines in synthesis videos made by Thanh Thai Motor.

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

With powerful 5.5kW 7.5HP power along with flexible combination capabilities with various gearboxes, this explosion-proof motor is an ideal choice for high explosion-risk working environments requiring strict safety and superior durability. To consult on the appropriate configuration and choose synchronized equipment, contact Thanh Thai Motor immediately.