Engineered to comply with Switzerland's strict safety standards, optimized for integration with advanced Alpine systems and VFD processes.
Switzerland stands as an global hub for high-value industrial sectors, including the pharmaceutical cluster in Basel, chemical manufacturing, specialty machinery, food processing, and complex Alpine underground engineering (such as tunnel ventilation and infrastructure systems). Within these environments, processing flammable liquids, gases, vapors, and combustible dusts poses strict risk-management challenges.
Swiss regulations, aligned with the Swiss Federal Act on Product Safety (PrSG) and the Ordinance on Equipment and Protective Systems for Use in Potentially Explosive Atmospheres (VGSEB), strictly mandate adherence to ATEX and IECEx directives. Industrial plant engineers are tasked with sourcing AC low voltage explosion-proof motors that not only meet the core safety requirements of European Zone 1, Zone 2 (gas hazards), Zone 21, and Zone 22 (dust hazards) but also achieve top-tier energy efficiency. With Switzerland's Energy Strategy 2050 aiming for minimal carbon output and maximum resource efficiency, transitioning to IE4 and IE5 efficiency class motors is key to reducing utility costs and system wear.
Providing the Swiss market with world-class engineering, supply chain reliability, and direct distribution channels.
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). Over more than 30 years of strategic development and technological integration, Wolong has built a global presence consisting of 3 manufacturing bases, 39 factories, and 3 R&D centers worldwide. Wolong focuses on the design, production, and support of motors and control systems, working to supply high-efficiency and safety-certified drive systems to global industrial sectors.
Through strategic acquisitions, Wolong has integrated some of the world's most recognized motor brands, blending European engineering with efficient global manufacturing.
Acquired in 2011, the Austrian ATB Group is one of the three major European motor manufacturers. It includes renowned specialized brands like Morley (130-year legacy in underground heavy-duty mining and tunneling) and Laurence Scott (low starting current technology and defense-grade marine systems).
A pioneer in motor design with over a century of history, Brook Crompton is recognized for development of high-efficiency industrial motors. Their "W" and "10" series of low, medium, and high voltage AC motors are standard configurations in critical European chemical and mechanical industries.
Established in 1882, Germany's Schorch sets standard configurations in petrochemical, power plant, and tunneling ventilation markets. Combined with General Electric's (GE) commercial and industrial motor division integrated in 2018, this brings heavy-industry drive technology to the product line.
A detailed look at the structural and electromagnetic design features of our AC low voltage explosion-proof motors.
Our rotors feature a robust squirrel-cage configuration. Cast aluminum construction is achieved through high-pressure die-casting or centrifugal casting techniques. This deposits pure molten aluminum into the rotor core slots to form integrated rotor bars and end rings, optimizing starting torque characteristics and mechanical durability.
For high-capacity, high-torque configurations, copper bar rotors are used. The joints are reinforced with specialized silver-alloy brazing and end-ring locking designs. This helps prevent thermal fatigue in demanding Swiss pumping systems, where frequent start-stops and variable frequency loads are common.
The stator windings are wound with high-purity, enameled copper wire. Ground and phase insulation consists of polyester film and glass cloth reinforced with high-mica-content tape. The complete assembly undergoes the Vacuum Pressure Impregnation (VPI) cycle with low-viscosity epoxy resin.
This process fills internal voids, sealing the windings against moisture, chemical vapors, and fine particulate penetration. The resulting stator offers high dielectric strength, mechanical rigidity, and thermal durability, maintaining a Class F insulation standard with a Class B temperature rise limit.
The motor enclosure is designed using finite element analysis (FEA) and fluid dynamics simulation. Cast from high-grade grey cast iron (or structural steel on demand), the frame features robust cooling fins and structural thickness. This design provides resistance against internal gas explosion pressures and external mechanical impacts.
The structural rigidity keeps vibration levels well below ISO 10816 limits, while the broad surface area supports heat dissipation under restricted alpine ventilation conditions or high-altitude applications in Switzerland.
To comply with Swiss workplace noise pollution regulations, the cooling system integrates an aerodynamically optimized fan, an air guide cylinder, protective mesh, and sound-dampening baffles. The side-entry air inlet prevents obstruction when installed close to walls or inside machinery compartments.
Dampening materials absorb high-frequency air shear noise, keeping sound pressure levels low. The system meets IP22 (up to IP56 optional) finger-safe standards, preventing contact with moving fan parts.
Combining high-capacity Chinese manufacturing with strict compliance standards to serve Swiss global procurement needs.
By leveraging Wolong's Nanyang explosion-proof production complex (China's leading R&D and manufacturing base for flameproof machinery), we offer Swiss clients reliable pricing, raw material sourcing, and quick production times. This scale is paired with standard compliance: all engineering designs, testing procedures, and assembly protocols are overseen by our European research centers in Austria and Germany.
This dynamic ensures that every AC low voltage motor shipped to Switzerland complies with European market standards, while benefiting from optimized production costs and dependable delivery schedules.
Nemko / ATEX
CSA
CE
CCC
SABS
TESTSAFE
Our explosion-proof motors are designed to operate reliably in Switzerland's primary industrial sectors.
Technical advice for engineering firms and procurement managers sourcing explosion-proof motors for Swiss projects.
Our motors are certified under EU Directive 2014/34/EU (ATEX) and the IECEx scheme, which are recognized in Switzerland via the Federal VGSEB framework. Every motor is shipped with compliance plates showing its Ex d (flameproof), Ex e (increased safety), or Ex t (dust ignition proof) markings, along with the corresponding test reports from European notified bodies.
Yes. Series such as the WEBP3 and YBBP are specifically optimized for VFD operation. They are equipped with isolated bearings on the non-drive end to prevent shaft currents and thermal sensors (PTC thermistors) embedded in the windings. These features ensure safe operation across the specified frequency range in Zone 1 or Zone 2 areas.
For processes involving organic powders or active pharmaceutical ingredients, we supply dust-ignition-proof motors (such as the YFB3 series) certified for Zone 21 and Zone 22 (Ex tb, Ex tc). These feature IP65 ingress protection, tightly sealed terminal boxes, and surface temperature controls to prevent dust ignition.
Our engineering team can supply custom shaft diameters, double shaft extensions, special paint coatings (for corrosive chemical environments), and custom flange configurations (DIN/IEC and NEMA standards) to match existing machinery mounts.
Explore our complete catalog of low voltage explosion-proof AC motors, built for reliable industrial operations.
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