Engineered to deliver high power density, reliability, and robust safety margins in volatile environments. These standard-setting medium and high voltage designs support Mumbai's critical petrochemical, chemical, and offshore installations.
Mumbai, the commercial and industrial capital of India, operates as the primary nerve center for petrochemical distribution, heavy chemical synthesis, pharmaceutical manufacturing, and marine offloading. The broader metropolitan corridors—including the Thane-Belapur industrial belt, Kalyan, Rasayani, Taloja, Roha, and Mahad—harbor some of the country’s most volatile processing plants. In these hazardous locations, the safety and integrity of operations rely heavily on the robustness of electric drives. Atmospheric conditions marked by high relative humidity (frequently exceeding 90%), coastal salinity, and ambient temperatures rising to 45°C impose severe thermodynamic and mechanical stress on electrical machines.
Typical applications in the region require AC High Voltage Explosion-Proof Motors that conform strictly to Indian Petroleum & Explosives Safety Organisation (PESO) approvals and international standards like IECEx and ATEX. The presence of flammable vapors, explosive gases (such as hydrogen, ethylene, and methane), and combustible coal dust in coastal power terminals demands certified containment mechanisms. Whether driving high-pressure water injection pumps for offshore platforms off the Mumbai High fields, powering massive air compressors in petrochemical refineries, or driving processing machinery in bulk drug units, these motors must deliver uninterrupted service while preventing any spark or internal explosion from breaching the outer casing.
Shaanxi Nanfang Motor Technology Co., Ltd serves as the authorized partner and premier global distributor of Wolong Electric Drive Group Co., Ltd. Founded in 1984 and listed on the Shanghai Stock Exchange in 2002 (code SH600580), Wolong has evolved into a global powerhouse in electric motor manufacturing and drive control technologies. With a vast global footprint that includes 3 manufacturing bases, 39 state-of-the-art factories, and 3 specialized R&D centers, Wolong delivers cutting-edge industrial motors and digital drive systems to demanding operators globally.
To establish itself as the premier designer of high-voltage AC motors and drive packages, Wolong strategically acquired several of the world's most respected electric motor manufacturers. This integration of technical intelligence and legacy engineering translates directly into superior products for critical installations.
In 2011, Wolong acquired 97.94% of the Austrian ATB Group, a top-tier European motor manufacturer. This acquisition brought under Wolong's umbrella the prestigious brands of Morley and Laurence Scott. Morley holds a nearly 130-year legacy in underground mining operations, manufacturing heavy-duty motors that define power and reliability in explosive subterranean atmospheres. Laurence Scott specializes in heavy-duty machinery with exceptionally low starting currents, famously equipping British nuclear facilities and naval vessels. Under Wolong's stewardship, Laurence Scott's continuous technological advancements have earned the Queen's Award for three consecutive years.
Integrating Brook Crompton Motors brought over a century of electric motor design expertise into the group. Brook Crompton is a global pioneer in developing energy-efficient low, medium, and high-voltage AC motors, including the premium "W" and "10" series designed for highly corrosive and hazardous environments.
Founded in 1882, Germany's Schorch joined Wolong in 2011, contributing market-leading drive systems for oil & gas, chemical processing, water utilities, and metallurgy. In parallel, Wolong's long-term partnership with Italy's OLI (established in 1999) cemented its dominance in the global vibration motor and Ex vibration sensor sector.
In 2015, China's largest explosion-proof research and manufacturing base, Nanyang Explosion Group (CNE), merged into Wolong, consolidating the company's capabilities in flameproof, increased safety, and positive-pressure technologies. In 2018, the commercial and industrial division of General Electric (GE) partnered with Wolong, transferring century-long manufacturing wisdom to further reinforce heavy industrial applications such as refining, pipeline pumping, and materials processing.
Every explosion-proof motor is built with premium materials and precise tolerances to prevent ignition propagation, manage heat buildup, and resist harsh coastal atmospheres.
Our rotors feature robust squirrel-cage configurations. Depending on structural requirements, we utilize centrifugal cast aluminum or die-cast techniques to form integrated rotor bars and end rings, delivering excellent starting torque characteristics. For high-output applications, copper bar rotors are utilized with state-of-the-art end-ring welding protocols and high-speed retaining rings, ensuring dynamic mechanical stability up to rated overspeeds.
The stator winding is designed to withstand transient voltages and high thermal loads. Built with high-purity copper conductors wrapped in polyester film, glass cloth, and high-content mica tapes, the complete core undergoes a comprehensive Vacuum Pressure Impregnation (VPI) cycle. This creates a solid, void-free insulation structure that offers exceptional moisture resistance, mechanical rigidity, and Class H thermal capability (operated within Class F limits).
The motor enclosure is designed using structural and fluidic multi-physics simulation platforms. Cast from high-grade, high-tensile iron or fabricated steel, the frame offers high mechanical stiffness and vibration absorption. Built-in cooling fins optimize heat dissipation under low-flow conditions, while the robust frame design ensures safety even under severe external mechanical impacts.
The ventilation system utilizes a low-noise, high-flow fan cover assembly. Integrating an aerodynamic air guide cylinder, protective debris screens, and integrated sound-attenuating baffles, it minimizes turbulence and windage noise. The side-entry air intake profile prevents blockage from adjacent piping structures, and the assembly is rated at IP22 to IP55 for comprehensive finger and particle safety.
Our explosion-proof designs carry comprehensive international certifications, ensuring compliance with global and regional safety regulations.
Nemko / ATEX
CSA
CE
CCC
SABS
TESTSAFE
To support global supply chains and simplify complex local approvals, Wolong motors comply with leading international quality and safety benchmarks:
Driving high-pressure pipeline pumps, cooling water circulation pumps, and hydrocarbon compressors in facilities like Trombay and Mahul. Our motors are built to withstand high levels of ambient chemical vapors.
Providing corrosion-resistant high-voltage motors for mixers, agitators, and exhaust fans in chemical manufacturing corridors across Maharashtra, protecting against acid and alkali vapors.
Providing marine-grade coatings, condensation-prevention heating elements, and IP65/IP66 enclosures for offshore drilling platforms and cargo handling installations in the Arabian Sea.
Discover our complete range of certified electric motors, low-voltage high-efficiency series, and excitation synchronous machinery for specialized industrial processes.
Consult with our engineers to select the proper frame size, explosion protection rating (Ex d / Ex p / Ex e), and custom technical specifications for your application.
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