Explore our leading range of high-efficiency asynchronous and synchronous electric motors engineered to comply with global safety directives and energy efficiency standards.
Shaanxi Nanfang Motor Technology Co., Ltd. is the authorized international distributor of Wolong. Founded in 1984, Wolong Electric Drive Group Co., Ltd. successfully listed on the Shanghai Stock Exchange in 2002 (stock code: SH600580). Over nearly four decades of intensive industrial growth, Wolong has established a powerful global manufacturing footprint.
Wolong operates 3 massive manufacturing bases, 39 advanced factories, and 3 state-of-the-art R&D centers globally. Wolong's product strategy targets premium motor design, advanced drive control systems, and localized engineering support, positioning itself as a top-tier developer of high-voltage (HV) explosion-proof motor systems across Europe, Asia, and the Americas.
Modern engineering projects in dangerous atmospheres require motors designed to restrict thermal and electrical ignition sources. Procurement teams at Tier-1 EPC firms focus on compliance with ATEX, IECEx, and regional directives such as CSA and SABS. As energy costs rise, shifting to IE4 and IE5 efficiency levels has become a key requirement for reducing lifetime operating costs.
Ensuring compliance with ATEX Zone 1/21 & Zone 2/22 and Division 1/2 certifications is essential for smooth global deployment. Project specifications demand strict verification of flamepath parameters to guarantee explosion-proof integrity.
Purchasing decisions focus on the lifetime costs of the motor rather than just the initial price. Deploying high-voltage permanent magnet synchronous motors (PMSM) cuts energy loss and improves facility efficiency.
In environments like offshore platforms or deep coal mines, motor downtime can lead to significant financial losses. Heavy-duty cast iron frames and advanced VPI insulation are standard requirements to prevent early motor failure.
We provide specialized motor and drive configurations designed for severe, high-risk industrial processes worldwide.
We deliver high-voltage flameproof motors (Ex d/Ex de) to power critical compressors, transport pumps, and cooling systems in refinery environments with volatile gases.
We design high-torque conveyor and cutter drives utilizing ATB Morley technology. These motors are engineered to resist heavy vibrations, dust buildup, and rough underground handling.
For municipal water distribution and power plant pumps, we supply low-starting-current Laurence Scott motors, ensuring grid stability during high-load operations.
Nanfang Motor offers certified drive systems designed to meet the strict requirements of international industrial standards.
Our motors carry explosion-proof certifications for major markets worldwide. This enables smooth integration into equipment destined for European, Eurasian, and Global markets.
We supply IE3, IE4, and IE5 class motors, including permanent magnet synchronous designs (PMSM). These units reduce energy consumption and assist operators in meeting carbon reduction targets.
We offer a comprehensive selection of low, medium, and high-voltage AC motors designed to operate reliably in hazardous locations and demanding industrial applications.
Wolong operates dedicated motor and drive R&D centers in China, Europe, and Japan. The central research institute in Shanghai focuses on next-generation efficiency and advanced control systems, ensuring our products match leading international designs.
Wolong's portfolio includes top domestic brands like Nanyang Explosion Protection alongside century-old global marques such as Brook Crompton, Morley, Laurence Scott, Schorch, and ATB, providing specialized engineering expertise for petrochemical, gas, and mining projects.
Our products feature robust flameproof housings, high-efficiency cooling, and high thermal safety margins. They are certified by major international testing agencies, meeting ATEX, IECEx, and EAC standards.
Through strategic acquisitions, Wolong has integrated historic European and American motor manufacturers into its global supply chain. This combines traditional engineering quality with high-volume, modern production capabilities.
Acquired in 2011, Austria's ATB is a leading European motor manufacturer. This acquisition brought specialized design capability, including the Morley mining motor division and Laurence Scott custom electrical technologies, into Wolong's product portfolio.
With over a century of experience in motor design, Brook Crompton is recognized for development of high-efficiency industrial motors. The brand provides a range of low, medium, and high-voltage AC motors designed for harsh environments.
Established in Germany in 1882, Schorch specializes in heavy-duty drive systems for oil, gas, chemical processing, marine propulsion, and large-scale industrial water projects.
Established in China in 1999 as a joint partnership, OLI is a global provider of industrial vibration motors and explosion-proof vibration sensors, serving bulk material handling applications.
Joining Wolong in 2015, CNE is one of China's largest specialized explosion-proof research and manufacturing bases, supplying heavy-duty drives for chemical processing, nuclear power plants, and oil transport systems.
Partnering in 2018, GE's commercial and industrial motor division brought decades of heavy-industry design experience to Wolong, supporting applications in power generation, steel mills, and mining.
Wolong products meet international quality and safety directives. Our global certifications allow our equipment to comply with the standard operating procedures of national safety regulatory bodies.
Nemko/ATEX
CSA
CE
CCC
SABS
TESTSAFE
Wolong operates as an ISO 9001 certified explosion-proof motor manufacturer. This quality standard governs our entire production cycle, from raw material procurement to final dynamic balancing and insulation testing, ensuring batch-to-batch reliability.
To verify our motors meet NEMA mechanical and electrical performance standards, we carry out comprehensive product verification, including efficiency testing, insulation resistance tests, starting torque evaluation, and vibration and noise analysis. For the North American market, our low-voltage motors are certified by UL and CSA.
For high-voltage and specialized explosion-proof motors operating in gaseous or dusty atmospheres, Wolong provides IECEx and ATEX certified models. This simplifies engineering approval for European Union projects and international installations requiring explosion safety certifications.
We hold Testsafe certifications, which are recognized for mining safety in Australia. This enables our explosion-proof mining motors to meet Australian coal mine safety guidelines, establishing a solid foundation for equipment deployment in Oceania.
Wolong motors are designed utilizing finite element analysis (FEA) and fluid thermal modeling. This approach ensures robust frame construction, efficient heat transfer, and reduced mechanical losses.
Our rotors feature a squirrel-cage design. For standard applications, cast aluminum rotors are manufactured using centrifugal casting or die-casting methods, which integrate the rotor bars and end rings into a single piece. This design provides robust structural integrity and stable torque delivery.
For high-capacity, high-voltage motors, copper-bar rotors are utilized. The copper bars are secured using specialized welding procedures on the end rings. High-speed models also incorporate safety rings to maintain alignment and balance at rated operating speeds.
The stator windings are constructed using high-quality polyester film reinforced with glass cloth and high-mica-content tape. The completed stator assembly undergoes a Vacuum Pressure Impregnation (VPI) process using solvent-free resins.
This VPI treatment creates a void-free insulation structure that provides mechanical strength, moisture resistance, and high thermal stability. The insulation system is designed to handle electrical stresses when the motor is operated on variable frequency drives (VFDs).
Motor frames are designed utilizing multi-physics simulation platforms to model mechanical stresses and thermal dissipation. Cast iron and structural steel are used to provide the stiffness required for heavy industrial applications.
The structural design provides thermal dissipation surface area and minimizes resonance. This helps protect the motor from external mechanical shocks, keeps vibration levels within standard limits, and prevents excessive temperature rise.
The low-noise ventilation system consists of an aerodynamically shaped fan cover, air guide cylinder, protection screens, and sound-absorbing baffles. The side-entry air design avoids rear obstructions to maintain airflow and reduce acoustic energy losses.
Integrated sound-absorbing materials reduce operating noise. The fan cover meets IP22 protection standards, preventing accidental contact with rotating parts while keeping ventilation pathways clear.
Deploying large-scale electrical drives requires reliable engineering support and regional documentation compliance. Through Shaanxi Nanfang Motor's network, we provide technical support throughout the project lifecycle.
We provide full verification services at our manufacturing facilities. Procurement teams and third-party inspectors can monitor temperature rise, starting torque, and insulation integrity tests prior to shipment.
We deliver comprehensive technical dossiers, drawings, and maintenance manuals in English, Russian, German, and French, simplifying engineering approval and commissioning processes.
Through Wolong's global network, we coordinate the supply of replacement bearings, wind paths, and terminal box components to reduce downtime for overseas plants.
The industrial sector is shifting towards digital monitoring and higher efficiency targets. Our research and development projects focus on integrating intelligent systems with next-generation materials to meet these demands.
We are integrating vibration and temperature sensors into the frame structure of our motors. Using OLI diagnostic technologies, these systems monitor bearing vibration and stator temperature, allowing operators to transition to predictive maintenance schedules.
We are developing high-voltage permanent magnet synchronous motors (PMSM) that meet IE5 efficiency standards. These motors are optimized for variable speed operations, offering energy savings in fluctuating industrial applications.
View our range of medium-voltage, high-voltage, and specialized motor designs configured for severe operating conditions.
Wolong maintains 39 manufacturing facilities and 4 R&D centers across the globe, with locations in China, Vietnam, the United Kingdom, Germany, Austria, Italy, Serbia, Mexico, and India.
Our motors are designed for high-stress applications in heavy industries, powering equipment such as industrial fans, pumps, compressors, and conveyors. They are used in the petrochemical, oil and gas, coal mining, metallurgy, power generation, maritime, and industrial automation sectors.
Get professional, engineering-focused answers to common queries regarding high-voltage explosion-proof motors.
Ex d (Flameproof): The motor enclosure is designed to contain an internal explosion without rupturing, preventing the transmission of flames to the external explosive atmosphere.
Ex e (Increased Safety): The design incorporates additional measures to prevent the formation of arcs, sparks, or hot spots during normal operation or under specified overload conditions.
Ex p (Pressurized): The housing is kept under constant positive pressure with clean air or inert gas, preventing flammable gases from entering the enclosure.
The VPI process places the wound stator in a vacuum tank to extract air and moisture from the insulation layers. Solvent-free resin is then introduced under pressure, filling all voids within the winding structure.
This treatment provides mechanical strength, high heat transfer, and protection against moisture and chemicals, helping prevent early electrical failures.
Yes. Our VFD-compatible models, such as the YBBPX and BPY-S30 series, utilize specialized stator insulation and corona-resistant materials to withstand voltage spikes from VFDs. Insulated bearings are also used to prevent shaft current issues.
Our motors are tested according to IEC 60034 and IEC 60079 series standards. They meet ATEX guidelines for European installations, NEMA (UL/CSA) standards for North America, and hold regional certifications including EAC and SABS.
NANFANG
