1400kW 6000V High Voltage Rib Cooled Fan Motor

This 1400 kW 6000V rib‑cooled high‑voltage three‑phase squirrel‑cage asynchronous motor is purpose‑optimized for heavy‑duty fan driving applications and manufactured to comply with IEC international standards. Adopting IC411 totally‑enclosed rib surface cooling (TEFC), it eliminates bulky top‑mounted air‑to‑air heat exchangers required by box‑type YKK motors. Built with heavy‑duty cast‑iron housing with densely‑arranged external cooling fins, it delivers high power‑density and compact footprint. Designed for S1 continuous full‑load operation, it can be directly connected to 6 kV industrial power grid, widely used in thermal power plants, cement works, metallurgical and petrochemical industries to drive induced‑draft fans, forced‑draft fans and large‑volume process blowers.

Core Technical Parameters 

Electromagnetic design adopts finite‑element simulation tuned for typical fan load characteristics, featuring medium starting torque, long‑term continuous operation and frequent partial‑load running conditions. The stator core is laminated by premium low‑loss silicon‑steel sheets to minimize iron loss, stray loss and magnetic leakage under both full‑load and partial‑load fan working cycles. Stator windings utilize corona‑resistant high‑conductivity copper magnet wire and undergo complete VPI vacuum pressure impregnation treatment. The solid integrated winding structure provides excellent dielectric strength, thermal stability and anti‑electrical‑aging performance, capable of withstanding industrial grid voltage fluctuation and repeated startup impact. Given the high‑power 1400 kW rating, copper‑bar squirrel‑cage rotor is used as standard configuration, which delivers superior mechanical rigidity, low rotor loss and well‑balanced starting performance. Each rotor assembly passes strict high‑precision dynamic balance calibration to suppress vibration and noise, a critical requirement for fan systems sensitive to mechanical oscillation.

Its core advantage lies in IC411 rib‑cooled totally‑enclosed mechanical construction. Internal heat generated during operation transfers to densely‑arranged external cooling ribs of cast‑iron frame and is dissipated by shaft‑driven external fan. Without additional air‑to‑air heat‑exchanger assemblies, overall dimension and installation height are significantly reduced compared with equivalent‑power YKK box‑type motors, saving valuable layout space inside fan equipment rooms. The fully‑enclosed housing prevents dust, fiber debris and mild corrosive fumes from invading windings and iron core, offering far better environmental adaptability than open‑ventilated IP23 high‑voltage motors.

Bearing system is selected according to operating speed of the driven fan. For medium‑speed fan configurations, heavy‑duty rolling bearings are adopted; sliding bearings are available for large‑frame high‑speed variants. PT100 temperature sensors can be embedded in stator windings and bearing housings as optional configuration, transmitting real‑time temperature signals to central control system for remote condition monitoring and over‑temperature early warning. Space heater can be fitted to avoid winding condensation during motor stand‑by periods. For fan energy‑saving retrofits with variable‑frequency drives, IC416 independent external fan cooling can be supplied to guarantee sufficient cooling airflow under low‑speed operation. Customization options include high‑altitude adaptation, damp‑tropical anti‑corrosion coating, modified terminal‑box orientation and double‑shaft extension to satisfy various fan‑system project requirements.

This 1400 kW 6000V rib‑cooled motor is mainly dedicated to heavy‑duty fan applications. It is widely deployed for large‑capacity induced‑draft and forced‑draft fans in thermal power stations, main process blowers in cement plants and ventilation blowers for metallurgical and chemical facilities. It supports both direct‑on‑line startup and high‑voltage soft‑starter configuration according to actual on‑site grid capacity. Before delivery, each motor completes comprehensive factory acceptance tests covering insulation resistance test, high‑voltage withstand test, no‑load running test, efficiency verification, vibration and noise inspection. Featuring compact layout, high‑level enclosed protection, fan‑optimized performance and easy‑maintenance design, this 1400 kW IC411 rib‑cooled high‑voltage motor provides reliable and efficient driving solution for large‑scale industrial fan systems.