Engineered for high performance under explosive gas and dust environments. These premium low voltage motors serve major industrial applications across the Chukyo Industrial Zone.
Understanding Nagoya's localized hazardous area requirements, explosive mitigation policies, and advanced manufacturing trends.
The Chukyo Industrial Zone, anchored by Nagoya, constitutes the beating heart of Japanese heavy manufacturing. Bordered by the major petrochemical and refining complexes of the Yokkaichi and Chita peninsulas, it requires process motors designed with maximum safety indices. Any electrical drive deployed in these environments must conform to tight localized safety mandates.
In volatile areas containing combustible gases (such as hydrogen, ethylene, and methane) or carbonaceous dusts, standard AC induction motors risk sparking and igniting the surroundings. Flameproof (Ex d) and increased safety (Ex e) motors are therefore critical to safeguarding workers and capital assets.
Nagoya is spearheading Japan's shift toward hydrogen energy integration, including hydrogen fueling stations and fuel-cell powered heavy logistics. Generating, compressing, and storing hydrogen requires industrial machinery certified under Group IIC criteria, representing the most stringent explosion mitigation category due to hydrogen's low ignition energy.
To fulfill this critical niche, our Wolong low voltage AC explosion-proof motors undergo rigorous engineering checks. They provide Class IIB+H2 and IIC flame protection levels, making them drop-in upgrades for advanced clean-energy plants.
Combining world-class engineering, distribution excellence, and an extensive lineage of global brands to serve the Nagoya and international market.
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.
How our explosion-proof portfolio ensures thermal stability, safety conformance, and peak operating efficiency.
Different kinds of Ex certificates are available for your local industry and target market. Ready for European, Asian, and Eurasian applications.
IE5, IE4, and IE3 efficiency classes are available for custom specifications. We also offer specialized permanent magnet variants for torque efficiency.
A comprehensive range of motors designed to meet the operational parameters of different hazardous industries and harsh physical environments.
Combining Wolong's technological foundation with competitive, high-throughput Chinese factory production.
Wolong has established motor and drive control R&D centers in China, Europe, and Japan, and established a central research institute in Shanghai, it is committed to the research of leading technologies in the field of motor and control technology and development, some products have reached the international leading level.
Wolong owns leading domestic brands such as Nanyang explosion, as well as internationally renowned century-old brands, such as Brook Crompton, Morley, Laurence Scott, Schorch, ATB, etc., and has a high brand reputation in the fields of oil and gas, petrochemicals, mining, etc.
As a well-known domestic motor manufacturer, Wolong has significant advantages in explosion-proof performance, reliability, durability, etc., and are widely used in dangerous environments such as petroleum, chemical industry, coal mines, etc., and have passed the explosion-proof certification of national authoritative agencies and international fields: ATEX, IECEx, CU-TR, etc.
A history of acquiring premier industrial driving systems manufacturers across Europe and America, strengthening Wolong's technological foundation.
Accumulated with abundant assets and brilliant experience in manufacturing, WOLONG started to reach for higher attempts. To be the leading manufacturer of AC motors & drives worldwide, WOLONG strove to acquire overseas groups. Through global coordination, Wolong has combined top-tier European machinery heritage with Chinese manufacturing capabilities.
Dating back to the year 1999, WOLONG has jointly started the business with OLI vibration motor in China. OLI Brand owns the largest market for vibration motors and Ex vibration sensors around the globe.
In 2011, WOLONG acquired 97.94% of the Austrian ATB Group (ATB motor), becoming the actual controller of one of Europe's top three motor manufacturers. The ATB group includes historical brands such as Morley (mining equipment, with a history of nearly 130 years) and Laurence Scott (nuclear reactor power plant drives and low-starting-current naval vessels equipment). Concurrently, Schorch Electric Motor (established in 1882) joined the WOLONG portfolio, providing systems for oil and gas, shipbuilding, and water management.
In 2015, WOLONG Electric Nanyang Explosion-proof Group Co., Ltd. (CNE), China's largest explosion-proof motor scientific research and production base, officially joined the WOLONG Group. This merger brought deep capabilities in designing Ex-proof high voltage motors, positive-pressure motors, and underground coal mine equipment.
In 2018, General Electric's (GE) commercial and industrial motor division joined the ranks of WOLONG. This integration provided technical support and global supply chain networks across heavy chemical industries, paper mills, and material processing systems.
Furthermore, Brook Crompton Motors joined the WOLONG group. Brook Motor stands as a venerable participant within the electric motor sector, boasting over a century of experience in design and manufacturing. Driven by technical innovation, Brook Crompton has developed low voltage, medium voltage, and high voltage AC motors, including the premium "W" and "10" series suitable for hazardous areas.
A technical breakdown of our low voltage explosion-proof AC motors' design, thermal mitigation, and safety features.
The rotor features the 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.
Our products comply with international regulatory criteria, facilitating integration into global supply chains.
Adhere to the comprehensive marketing strategy for the electric motor and the entire industry chain: WOLONG has secured the majority of product certifications, enabling it to penetrate the international market.
Nemko / ATEX
CSA
CE
CCC
SABS
TESTSAFE
ISO Standard: WOLONG is an ISO 9001 Ex motor manufacturer. This certification is a critical gateway for surmounting international trade barriers.
NEMA Standard: To confirm that WOLONG's electric motors meet NEMA's mechanical and electrical performance specifications, we conduct efficiency, insulation, starting current, and torque testing. For low-voltage motors, WOLONG holds both UL and CSA certifications.
IECEx & ATEX Standard: For low & high-voltage explosion-proof motors, WOLONG holds IECEx and ATEX certificates, facilitating export and integration across Europe and Asian processing plants.
TESTSAFE Standard: As a certification body in the Southern Hemisphere, Testsafe compliance provides a channel for coal mining motors to enter Australia and other global markets.
Deploying targeted driving technology across automotive painting, port logistics, and chemical processing complexes.
Automobile assembly lines in Nagoya use solvent-based painting booths with volatile organic compounds (VOCs). These areas are classified as Zone 1 or Zone 2 hazardous locations. Our low voltage variable frequency explosion-proof motors (such as the WEBP3 and YBBP series) provide flame containment and speed control for ventilation fans and recirculation systems.
The Port of Nagoya manages bulk storage facilities for liquefied chemical cargos and oil derivatives. Driving fluid pumps, loading arms, and vapor recovery systems requires motors with Class Ex d sealing. Our YBX3 and YBX4 series motors provide spark prevention and protection against outdoor salt spray corrosion.
Nagoya's municipal hydrogen distribution infrastructure requires high-pressure compressors to store hydrogen gas. These environments require Class IIC certified explosion-proof motors. Our variable frequency drive solutions maintain reliable starting torque while complying with flameproof standards.
Select from our complete range of certified three-phase asynchronous motors designed for hazardous applications.
Get answers to common technical queries regarding low voltage AC explosion-proof motors.
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