Highly optimized low-voltage electric drives built to satisfy local TISI compliance alongside international IECEx and ATEX explosion protection directives.
Thailand's rapid industrialization, particularly under the **Eastern Economic Corridor (EEC)** initiative, has expanded large-scale refining, natural gas extraction, petrochemical processing, and coal-fired energy generation facilities in provinces such as Rayong, Chonburi, and Chachoengsao. These hazardous areas involve combustible gases, vapors, and coal dusts, which mandate the absolute usage of certified explosion-proof AC low-voltage induction motors to avert catastrophic occurrences.
Local compliance bodies, like the Thai Industrial Standards Institute (TISI), have aligned their standard procedures closer to international IEC standards (IEC 60079 series). Therefore, procurement agents and EPC contractors in Bangkok and Rayong must source low-voltage industrial drives that bear valid IECEx / ATEX certificates. Such certifications assure that under continuous operation or electrical fault conditions, the motor frame retains the inner explosive force and prevents flame propagation to the surrounding volatile ambient gas.
Globally, the transition towards sustainable, highly efficient production setups requires motors matching premium efficiency tiers (IE3, IE4, and increasingly IE5). As standard motors contribute to over 70% of energy usage in industrial plants, integrating highly efficient explosion-proof motors enables companies to comply with ESG regulations and reduce operating costs.
Our manufacturing and distribution partnership with Wolong Electric Drive Group empowers us to ship motors straight from high-automation manufacturing facilities in China. These modern lines employ automated VPI (Vacuum Pressure Impregnation) stations, robotic stator winding machinery, and dynamic rotor balancing rigs.
The Authorized Global Distributor of Wolong Electric Drive Group.
Shaanxi Nanfang Motor Technology Co., Ltd is the authorized distributor of Wolong. Wolong Electric Drive Group Co., Ltd was founded in 1984 and successfully listed in 2002 (code SH600580). After more than 30 years of development, Wolong has 3 manufacturing bases, 39 factories, and 3 R&D centers worldwide now. Wolong has always focused on the manufacture of motors and control systems, committed to a global brand strategy, making Wolong a leader in R&D, technology, process, manufacturing and sales in the global market.
Equipped with international Ex certifications. Ensures complete compliance with standard engineering requirements across the EU, Middle East, Southeast Asia, and CIS regions.
We supply motors meeting standard IE3, IE4, and advanced IE5 efficiency limits. Permanent magnet motor designs are also available to support carbon neutrality goals.
A broad motor portfolio covering low-voltage AC drives, medium/high-voltage machines, and specialized tunnel boring and mine-grade flameproof designs.
Integrating world-renowned electric motor brands under one comprehensive manufacturing banner.
Accumulated with abundant assets and brilliant experiences in manufacturing, WOLONG started to reach for higher attempts. To be the leading manufacturer of AC motors & drives worldwide, WOLONG strove to acquire the oversea groups. In 2011, WOLONG company acquired strong technical and technological supports. WOLONG’s holdings group successfully acquired 97.94% of the Austrian ATB Group (ATB motor), one of the three major European motor manufacturers, becoming the actual controller of the ATB Group. ATB motor group includes the brand Morley in the mining industry and Laurence Scott, both excellent in motor manufacturing.
Morley motor, with its nearly 130-year history, has been closely linked to underground coal mining. Currently, the Morley brand is highly esteemed in the global underground coal market and has become synonymous with quality, power, and reliability. Laurence Scott, the pioneering company that supplied motors for British nuclear power plants, is currently renowned for manufacturing equipment with low starting currents and also equips British naval vessels with generators. Following its acquisition by WOLONG, the company has been honored with the Queen's Award for three consecutive years.
Brook motor stands as a venerable and profoundly skilled participant within the electric motor sector, boasting over a century of mastery in the technology and design of electric motors. With its extensive background in technological innovation and design, Brook Crompton Motors leads the way in motor technology advancements and pioneers in the creation of energy-efficient motors. Driven by technology and innovation, Brook Crompton Motor has developed a complete range of low voltage, medium voltage and high voltage AC motors, including the premium Brook Crompton “W”, “10” series and motors suitable for operation in hazardous and harsh environments.
Since its establishment in 1882, Schorch has set the standard for high-quality motors. The company offers a diverse range of driving systems to customers globally, catering to both domestic and international projects. Schorch collaborates with partners to provide services across various industries, including oil and gas, chemicals, power generation, water supply and wastewater management, shipbuilding, steel and metal processing, test stations, tunnels, and so forth.
In 2015, WOLONG Electric Nanyang Explosion-proof Group Co., Ltd. (CNE), China's largest explosion-proof motor scientific research and production base, joined the WOLONG Group. With various types of explosion-proof motors, low voltage asynchronous motors, and Ex-proof high voltage motors, Nanyang Explosion Group’s motors are mainly used in oil, coal, chemical, metallurgy, electricity, military, nuclear power, and other fields.
In 2018, General Electric (GE) joined the ranks of WOLONG. As the oldest manufacturer of commercial and industrial electrical equipment, GE caters to a multitude of heavy industries, encompassing oil and gas, petroleum and chemicals, power generation, mining and metal processing, paper, water treatment, cement, and materials processing. With abundant experience in electric motor manufacturing, GE provides huge support to WOLONG.
Inside the structural design of Wolong's explosion-proof low-voltage asynchronous AC motors.
The rotor features a squirrel cage design, with cast aluminum rotors being widely utilized. These rotors are produced using either centrifugal aluminum casting or die-casting techniques, where molten pure aluminum is poured into the slots of the rotor core, resulting in a single-piece construction that integrates the rotor bars and end rings. The structural integrity and manufacturing process of cast aluminum rotors guarantee the motor rotor's reliability, and also endow the motor with outstanding torque properties.
For larger capacity motors, copper bar rotors are employed, which benefit from dependable bar securing and end ring welding procedures. Additionally, the protective ring design of high-speed motors further ensures the reliable operation of the copper bar rotor.
The coil is crafted from polyester film and reinforced with glass cloth, utilizing either low-powder mica tape with a high mica content or medium-powdered mica tape with an abundance of mica. Following the VPI (Vacuum Pressure Impregnation) process, a pristine white coil emerges from the production line. After the billet is extracted from the wire, it proceeds through the VPI process to transform into a finished unit. The winding and insulation are meticulously engineered to provide exceptional electrical performance, mechanical strength, resistance to moisture, and thermal stability.
The motor frame employs a fully digital platform for structural and fluid multi-physics field simulations. This simulation platform retains the original patent's structure and design, utilizing mature, high-strength cast iron (or steel as an alternative). The frame boasts exceptional structural redundancy, outstanding heat dissipation properties, and ample inherent frequency isolation margins for the entire machine. It is engineered to endure significant mechanical shocks, maintain a superior vibration level, and ensure a lower temperature increase in the motor.
The low-noise fan cover system comprises a fan cover body, an air guide cylinder, a protective window, and a silencer plate. Its compact structure and lightweight design facilitate vibration reduction. The air inlet is situated on the side, which optimizes the avoidance of obstacles behind the motor, minimizing adverse effects on ventilation and reducing noise caused by energy loss during propagation path changes.
The system also incorporates sound-absorbing materials that absorb noise, thereby lowering the overall motor noise. Additionally, the fan cover is rated IP22, ensuring that hands cannot come into contact with the fan.
Ensuring cross-border compliance for engineering firms and procurement offices worldwide.
Nemko / ATEX
CSA Standard
CE Mark
CCC Ex
SABS Approved
TESTSAFE
Where Wolong low-voltage explosion-proof motors deliver performance and safety across Thai provinces.
Thailand’s primary oil refineries and petrochemical cracking installations handle volatile hydrocarbons. For applications involving gas storage tanks, refinery cooling towers, and heavy-duty product transfer pumps, our WEBP3 and YBX3 flameproof series help prevent accidental ignition from electrical arcs or motor casing temperatures, matching Class I Division 1/2 or Zone 1/2 requirements.
For municipal water distribution networks, heavy drainage projects, and transit tunnels, safe ventilation and pumping systems are vital. Wolong's YBU/YBUS series and water pump motors provide dependable ventilation and drainage under harsh, enclosed operating conditions.
Select from our certified low-voltage asynchronous configurations for your local project needs.
Modern industrial sites demand higher safety margins and lower energy footprints. The main shifts include:
When sourcing AC low-voltage explosion-proof motors for international installations or local Thai projects, verify the following specifications:
Technical answers for engineers, plant managers, and procurement officers.
ATEX is a mandatory European Union directive required for equipment used in hazardous areas within the EU. IECEx is a voluntary, globally recognized conformity scheme that simplifies international acceptance. In Thailand, while local TISI standards apply, engineering firms and major operators (such as PTT) generally accept IECEx-certified equipment directly for hazardous area projects.
Operating a motor on a VFD can increase internal winding temperatures due to harmonic currents and reduced cooling performance at lower fan speeds. Our WEBP3 and YBBP variable frequency explosion-proof series feature optimized insulation designs and thermistors in the windings, ensuring the motor casing remains safely within its specified T4 temperature rating across its speed range.
Generally, gas-explosion-proof designs are not certified for dust environments unless they also carry a dust-ignition-proof rating (such as Ex tD / Ext). Gas and dust present different hazards and require different design approaches. For dusty environments, we supply the specialized YFB3 series dust-ignition-proof motors, which prevent combustible dust from entering the housing.
Vacuum Pressure Impregnation (VPI) removes air pockets and moisture from the stator windings, replacing them with protective varnish. This process enhances the motor's mechanical strength, moisture resistance, and thermal conductivity, helping it withstand the high humidity and temperature variations typical in tropical climates like Thailand.
As an authorized distributor of Wolong Electric Drive, we streamline the supply chain by coordinating production directly with the factory, managing customs paperwork, and organizing logistics to regional ports like Laem Chabang. This helps reduce lead times and shipping costs for customers in Southeast Asia.
Contact our engineering sales team to request pricing, technical drawings, or custom modifications for low-voltage explosion-proof motors.
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