Premium selection of high-voltage and low-voltage heavy duty industrial motors designed for hazard zone operations and processing lines.
The cooling designation IC411 (according to standard IEC 60034-6) specifies a machine with surface cooling, using the surrounding medium (ambient air) as the coolant. The circulation is driven by a self-driven fan (shaft-mounted) that blows air over the ribbed outer casing of the motor frame. As the motor rotor spins, the internal heat is conducted to the external surface cooling ribs, where the heat is carried away by the continuous flow of air from the external fan.
This thermal management design offers high operational reliability because it does not require external electricity to operate auxiliary cooling fans. It is the industry standard for general machinery, mining, oil, gas, and petrochemical processes where robust performance under continuous duty cycle operations (S1) is required.
Your Premier Gateway to Wolong Electric's Global Motor Portfolio
Shaanxi Nanfang Motor Technology Co., Ltd. is the authorized international distributor of Wolong Electric Drive Group Co., Ltd. Wolong, founded in 1984 and listed on the Shanghai Stock Exchange (SH600580) in 2002, is a global powerhouse. Over more than 30 years of industrial expansion, Wolong has built 3 global manufacturing bases, operates 39 state-of-the-art factories, and manages 3 world-class R&D centers.
Through strategic acquisitions of historic motor manufacturers, Wolong has integrated unmatched technical prowess and brand names such as ATB, Brook Crompton, Morley, Laurence Scott, Schorch, OLI, and General Electric (GE) Industrial Motors into its corporate system, providing the global market with leading-edge self-ventilated IC411 motors.
A strategic analysis of manufacturing capability, supply chain consolidation, and high-standard design engineering.
China-based factories feature proximity to the world's leading suppliers of cold-rolled silicon steel sheets, high-purity copper windings, and advanced synthetic varnishes. This guarantees top-tier materials for every IC411 motor frame manufactured.
Equipped with computerized VPI (Vacuum Pressure Impregnation) equipment, high-speed balancing rigs, and full-scale dynamometer test beds. We evaluate structural frequencies, cooling capacity, and explosion-proof parameters before dispatch.
By leveraging Wolong's 39 manufacturing factories, we consolidate procurement and automate standard machining operations. This offers high-spec ATEX, IECEx, and NEMA motors at highly competitive price points.
| Feature Spec | Wolong China IC411 Standard | Market Standard Alternative | Industrial Advantage |
|---|---|---|---|
| Insulation Class | Class F, H available (with Class B temperature rise limit) | Standard Class F | Longer Motor Life |
| Vibration Index | Grade A (Grade B upon request) - strictly balanced | Basic ISO limits | Smoother Operation |
| Casing Materials | High-grade HT200/HT250 Grey Cast Iron or fabricated steel | Low-grade cast iron | Impact Resistant |
| Efficiency Grade | IE3 (Premium) / IE4 (Super-Premium) / IE5 (Permanent Magnet) | IE1 or IE2 basic level | Low Power Draw |
Tracing the development of Wolong Electric as a global leader in high-performance electric drive solutions.
Wolong successfully acquired 97.94% of the Austrian ATB Group, one of the three major European motor manufacturers, becoming the actual controller of ATB, Morley (130-year history in underground mining motors), and Laurence Scott (low starting current custom machines). In the same year, German industrial pioneer Schorch electric motor joined Wolong.
Wolong integrated Nanyang Explosion-proof Group (CNE), China's largest scientific research and production base for flameproof and explosion-proof motors, completing high-voltage motor expansion for hazardous locations.
Wolong acquired General Electric (GE) Industrial Motors business, including its technology platform and sales channels, establishing a powerful footprint across North and South American industrial markets.
A unified global matrix of 39 factories, 3 core R&D bases, and world-class product line integration (including Brook Crompton and OLI vibration motors) serving global oil, gas, chemical, coal mining, and metallurgical sectors.
Detailed analysis of core motor components built for longevity and harsh operation.
Features squirrel-cage design using centrifugal aluminum casting or die-casting techniques for unified construction of rotor bars and end rings. This guarantees high starting torque properties. For larger capacity systems, premium copper bar rotors are utilized with reliable welding and protective containment ring designs.
Coils crafted from polyester film reinforced with glass cloth, using high-content, low-powder mica tape. Undergoes Vacuum Pressure Impregnation (VPI) for complete moisture sealing, structural rigidity, and thermal stability. Excellent electrical performance and long insulation lifetime under VFD/VSD high-voltage spikes.
High-strength cast iron (or fabricated structural steel for custom sizes) engineered via multi-physics field simulations. Excellent vibration control, high thermal dissipation margin, and structural rigidity designed to endure heavy industrial mechanical impacts.
Our self-ventilated IC411 motors are equipped with low-noise fan covers comprising a fan cover body, air guide cylinder, protective grid windows, and silencer plates. The air inlet is positioned on the side to optimize airflow and avoid obstacles, reducing noise caused by energy losses along the air path. The cover is rated at IP22 (standard, custom up to IP55 or higher), preventing physical contact with the rotating fan blades.
Enabling seamless entry and reliable operations in global industrial zones.
WOLONG has secured the majority of safety, efficiency, and explosion-proof product certifications, allowing our electric motors to operate in critical zones around the globe.
Nemko / ATEX
CSA Standard
CE Conformity
China CC
SABS South Africa
TESTSAFE Australia
For high-voltage, low-voltage, and explosion-proof motors, Wolong has acquired full IECEx and ATEX certificates. This facilitates seamless export and plant engineering integration inside European Union countries and international projects requiring IECEx verification.
To verify that our electric motors meet mechanical performance specifications in North America, we perform rigorous tests, including: efficiency validation, insulation resistance, starting current/torque properties, and noise limits.
Deploying heavy duty self-ventilated motor drives across demanding operating environments.
Using explosion-proof motors (YBBP, YBBPX, YFB3) in hazardous environments to drive process pumps, gas compressors, and product transfer systems where flammable gases, vapors, or dust are present.
Heavy duty flameproof motors (like the Morley series) designed specifically to handle coal dust, moisture, and high starting loads on conveyor lines, mine ventilation fans, and slurry pumps.
Supplying variable frequency speed regulation systems for main water pump networks, municipal sewage processing stations, and onboard auxiliary generators on shipping vessels.
Technical guidance from Shaanxi Nanfang Motor's engineers to support your procurement decisions.
An IC411 motor uses a shaft-mounted fan, meaning the cooling airflow is directly proportional to the motor speed. This makes it highly efficient and low-maintenance for constant speed or narrow-range variable speed applications. In contrast, IC416 utilizes an independent electric blower to provide constant cooling air regardless of motor speed. IC416 is necessary if the motor must run continuously at low speeds under high torque conditions, where a shaft-mounted fan cannot provide enough cooling.
Yes, provided they are built and certified to appropriate explosion-proof standards, such as Ex d (flameproof), Ex e (increased safety), or Ex p (pressurized). The cooling method (IC411) simply refers to how heat is removed from the outer frame. The internal ignition safety is determined by the frame structure, terminal box sealing, and flame paths.
We provide a full range of high-efficiency classes under international standards, including IE3 Premium Efficiency, IE4 Super-Premium Efficiency, and IE5 Ultra-Premium Efficiency (typically utilizing permanent magnet synchronous technology, such as our WEPM series).
Each motor undergoes strict routine tests, including insulation resistance checks, winding resistance verification, no-load operations, vibration measurements, and dielectric testing. Type testing—such as full load temperature-rise tests, efficiency tests, and noise verification—can also be performed based on client requests.
Explore the full selection of low-voltage and high-voltage three-phase AC motors built by Wolong global factories.
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