Highly customized, certified explosion-proof units specifically configured to meet Japanese industrial standards and safety regulations.
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.
Tokyo, as the powerhouse of Japan's economic and technological development, demands the highest standards of safety, quality, and environmental compliance. The Keihin Industrial Region, which spans Tokyo, Kawasaki, and Yokohama, is one of the most prominent manufacturing hubs in the world. It houses large-scale petroleum refining, chemical plants, thermal power stations, and municipal wastewater treatment facilities that run non-stop. In these hazardous locations, the threat of volatile gases and vapor plumes is a constant concern. This makes robust industrial equipment crucial.
Furthermore, Tokyo's commitment to clean hydrogen energy infrastructure and massive liquefied natural gas (LNG) import ports along Tokyo Bay requires specialized explosion-proof solutions. These sites call for high-voltage (HV) machinery to drive large compressors, exhaust fans, high-pressure pumps, and material handling systems. A standard motor will not suffice. Designers and operators must procure motors that combine explosive atmosphere protection with high-efficiency electrical ratings, compliant with Japan's domestic safety laws regulated by the Ministry of Economy, Trade and Industry (METI) and Japanese Industrial Standards (JIS).
"The extreme safety focus of Japanese plant managers demands that AC high-voltage explosion-proof motors demonstrate not only ATEX and IECEx compliance, but also precise thermal management, low starting current options, and severe-duty construction that resists seismic activity and coastal corrosion in Tokyo Bay."
Unifying leading Western technology with robust, high-efficiency manufacturing capabilities.
Our entire high-voltage line is engineered to secure localized certifications worldwide, including ATEX, IECEx, and METI/JPEx approvals specifically for Tokyo and broader Japanese industrial projects.
Designed to comply with high global minimum energy performance standards (MEPS). We provide IE3, IE4, and advanced IE5 options, including customized permanent magnet synchronous designs.
Covering low, medium, and high-voltage applications up to 13.8kV. Our motors support all hazardous areas (Zone 1, Zone 2, Class I Div 1, and Class I Div 2) and variable frequency controls.
The Wolong Group has structured its growth to absorb centuries of engineering expertise. In 2011, WOLONG acquired a 97.94% stake in the Austrian ATB Group (ATB motor), which included legendary industrial names like Morley and Laurence Scott. Morley's 130-year legacy in coal mining and hazardous machinery construction combined with Laurence Scott's expertise in low starting current engineering for British nuclear facilities has elevated Wolong's technical ceiling.
This was followed by the inclusion of Brook Crompton Motors, a leader in premium, energy-efficient induction motors, and Schorch Electric Motor in 2011. Since 1882, Schorch has defined heavy-duty standards in German refining, marine propulsion, and chemical processing. In 2015, the addition of Nanyang Explosion-Proof Group Co., Ltd (CNE) solidified Wolong's role as one of the world's largest explosion-proof research and manufacturing centers. Finally, in 2018, General Electric's (GE) commercial and industrial motor division integrated into Wolong, securing a comprehensive global network of technological development, manufacturing assets, and supply logistics.
Inside the advanced architecture of our high-voltage explosion-proof motors.
The rotor features a rugged squirrel-cage design. Cast aluminum rotors are produced using centrifugal aluminum casting or precision high-pressure die-casting techniques, which pour pure molten aluminum into the core slots to form a unified, single-piece structure containing the rotor bars and end rings. This guarantees high torsional fatigue resistance and outstanding torque characteristics.
For larger high-voltage capacities, copper bar rotors are utilized. In these configurations, copper bars are inserted and welded to the end rings using advanced induction brazing. High-speed models also incorporate high-strength retention rings to ensure mechanical stability under extreme centrifugal load.
Our stator coils are wound using copper conductors covered with double Dacron-glass-backed polyester film tape, layered with premium low-powder or medium-powder mica tape. The stator core undergoes a full Vacuum Pressure Impregnation (VPI) cycle, curing into a dense, solid block of insulation.
This VPI procedure minimizes air pockets in the slots, providing superior heat dissipation, excellent resistance to moisture and chemical attack, high dielectric strength, and thermal endurance that easily exceeds Class F requirements (tested to Class H limits for premium protection).
The motor frame is designed using fully digital multi-physics simulation platforms to model mechanical stresses, thermal maps, and internal airflow. Built with high-tensile cast iron or fabricated structural steel plates, the frame offers high structural rigidity, minimal operational vibration, and robust seismic tolerance.
External cooling ribs are optimized for air velocity from the shaft-mounted fan, maintaining low skin temperatures and meeting gas group Ex d thermal limit ratings without compromising compact dimensions.
To reduce noise levels, our motors use an acoustic-damping enclosure that includes a heavy-gauge steel fan cover body, internal air guide cylinders, protective safety windows, and integrated silencer plates. The side-inlet air design optimizes airflow pathing, reduces turbulence losses, and lowers broadband noise.
The system integrates sound-absorbing composite insulation, keeping overall motor noise within strict occupational health standards. The layout is rated IP22 for fan contact safety and matches the overall IP55/IP56 motor enclosure rating.
In global projects, lead time, design flexibility, and cost efficiency are critical factors. Producing AC high-voltage explosion-proof motors requires advanced metallurgy, precision assembly, and strict testing. Operating out of our specialized factories in China, we leverage a robust local supply chain to source raw electrical steel, copper wire, and heavy castings. This allows us to shorten manufacturing schedules compared to domestic Japanese producers, without compromising on quality.
Shaanxi Nanfang Motor Technology Co., Ltd bridges this production network with Tokyo's industrial buyers. We ensure all customized components meet Japan's technical standards. This includes adapting shaft extensions to match legacy pumps, installing Pt100 RTDs in bearings and stator slots, fitting specialized space heaters to prevent condensation, and integrating JPEx-approved terminal boxes. Our engineering team manages document approvals, drawings, and testing certifications to facilitate smooth customs clearance and installation at Tokyo Bay facilities.
We provide comprehensive lifecycle support for our machinery. From initial design reviews and factory acceptance tests (FAT) to field installation and commissioning in the Kanto region, our engineers support your technical teams. In partnering with local service shops around Tokyo, we coordinate spare parts distribution, routine insulation testing, and bearing inspections. This helps plant operators minimize downtime and maintain explosion-proof safety compliance.
Testing, validation, and international credentials that assure absolute safety in explosive atmospheres.
Nemko / ATEX
CSA Group
CE Conformity
China Compulsory
SABS South Africa
TESTSAFE
We implement a comprehensive global compliance strategy across our entire motor supply chain. This enables our machinery to integrate into projects across Europe, North America, Oceania, and Asia:
Technical parameters for key product series serving Tokyo industrial districts.
| Motor Series | Protection Class | Voltage Selection | Frame Range | Primary Applications in Tokyo Area |
|---|---|---|---|---|
| YB3 Series | Ex d IIC T4 Gb | 3kV / 6kV / 10kV | 315 – 560 | Refinery pump stations, coastal oil depot storage facilities |
| YBBPX Series | Ex d IIB/IIC T4 Gb | 6kV / 10kV | 355 – 630 | VFD-driven centrifugal compressors, chemical mixers |
| YBXKK Series | Ex d IIB/IIC T4 Gb | 6.6kV / 11kV | 355 – 710 | High-efficiency gas pipeline fans, wastewater pumps |
| TZYW / TAW Series | Ex pxb / Ex eb IIC T3 Gb | 6kV / 10kV / 13.8kV | Frame sizes up to 1000 | Large-scale hydrogen gas compression, synchronous condensers |
As the Tokyo Metropolitan Government implements stricter decarbonization targets, industrial plants must optimize energy efficiency. The next generation of high-voltage explosion-proof motors focuses on reducing parasitic electrical losses. By combining premium magnetic materials with optimized winding patterns, we are transition-ready for IE4 and IE5 performance thresholds.
Moreover, predictive maintenance is becoming standard in modern operations. We are equipping our high-voltage motors with integrated wireless vibration sensors, stator temperature monitors, and acoustic microphones. When installed inside hazardous plant locations, these smart sensors transmit real-time data to control rooms. This allows maintenance teams to schedule service before failures occur, preventing emergency shutdowns and hazardous gas emissions.
Select from our range of explosion-proof induction and synchronous motors, built to international specifications.
Essential technical insights on high-voltage explosion-proof machinery integration in local and global markets.
To operate in Japan, motors must comply with domestic safety regulations administered by the Ministry of Economy, Trade and Industry (METI). In hazardous locations, they require JPEx (Japan Explosion-Proof) certification, which aligns with local JIS C 60079 series standards. While IECEx or ATEX data is used during validation, local Japanese type approval remains mandatory for legal installation.
Coastal environments expose equipment to moisture and airborne salinity, which can degrade insulation and cause ground faults. The Vacuum Pressure Impregnation (VPI) process seals the stator winding structure, preventing salt-laden air and moisture from penetrating the coils. This maintains high insulation resistance in high-humidity zones.
Ex d (flameproof) motors house internal sparks or explosions within a robust frame, preventing flames from escaping into the external environment. Ex p (pressurized) motors maintain positive pressure using an inert gas or clean air inside the housing. This prevents explosive gas mixtures from entering the enclosure, and is often selected for very large high-voltage synchronous motors where a flameproof frame is impractical.
We coordinate maritime freight directly from China to major Japanese ports like Tokyo and Yokohama. Our team assists with imports, local transportation, customs clearance, and ensures METI-related declaration papers are processed efficiently, minimizing delivery delays at construction sites.
Contact our sales and engineering support teams for technical specifications, localized drawings, and quote requests for projects in Tokyo and worldwide.
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