Purchase now: Bonfiglioli BE 90S 4 AC Electric Motor
Purchase now: Atlantechdrives provides you the BE 90S 4 230/400-50 IP55, a premium, high-efficiency three-phase asynchronous AC induction motor manufactured by the global power transmission experts at Bonfiglioli. Belonging to the advanced BE series, this industrial motor is specifically engineered to meet and exceed the stringent IE2 High Efficiency global energy standards. By utilizing superior electromagnetic design and optimized materials, the BE 90S 4 drastically reduces active electrical losses, lowering factory energy consumption and operational costs during continuous-duty applications. Built on a standardized IEC 90S aluminum frame (the «S» denotes a Short core length), it features a highly reliable 4-pole stator winding. Operating at a standard 50Hz frequency, it delivers a synchronous speed of 1500 RPM (typically running around 1420-1450 RPM under nominal full load). This 4-pole configuration provides the optimal balance of starting torque and running speed, making it the perfect prime mover for driving medium-sized worm gearboxes, fluid pumps, heavy-duty industrial blowers, and automated conveyors. Protected by an IP55 rating, it effectively repels factory dust and low-pressure water jets.
Technical Specifications of the BE 90S 4 Motor
The BE series incorporates high-grade copper windings and precision low-loss electrical steel laminations. This premium internal construction minimizes heat generation, substantially prolonging the lifespan of the Class F insulation and the factory-sealed ball bearings.
- Part Number: BE 90S 4 230/400-50 IP55
- Motor Type: IE2 High Efficiency 3-Phase AC Induction Motor
- Frame Size: IEC 90S (Short core, lightweight aluminum frame)
- Number of Poles: 4-Pole (1500 RPM synchronous speed at 50Hz)
- Voltage Requirement: 230V Delta (Δ) / 400V Star (Y)
- Frequency: 50 Hz
- Protection Rating: IP55 (Dust-tight and water jet protected)
- Cooling Method: IC411 (Totally Enclosed Fan Cooled – TEFC)
Expert Installation Advice: Critical Star-Delta Terminal Wiring
Incorrect wiring at the junction box is the number one cause of instantaneous motor failure during initial commissioning. Expert Tip: The nameplate of the BE 90S 4 clearly states the voltage as «230/400V». This dictates that the individual copper coils inside the motor stator are engineered to handle a maximum of 230 Volts. If your industrial facility provides a standard 400V 3-phase power supply, you must arrange the three brass bridging links inside the terminal box into the «Star» (Y) configuration. This safely distributes the 400 Volts across two coils in series. If you mistakenly wire the terminal block in the «Delta» (Δ) configuration (three parallel links) and apply 400V, the internal coils will receive nearly double their rated voltage. The Class F insulation will instantly melt, causing a catastrophic electrical short and potentially a fire.
Maintenance and VFD (Inverter Duty) Compatibility
Because the BE 90S 4 features robust Class F insulation and high-efficiency electromagnetic design, it is highly suitable for use with Variable Frequency Drives (VFDs) to precisely control process speeds and maximize energy savings. However, it is a TEFC motor (Totally Enclosed Fan Cooled), meaning the rear plastic cooling fan is mechanically driven by the rotor shaft. At extremely low frequencies (below 25 Hz), the fan spins too slowly to push adequate air over the aluminum cooling fins, failing to dissipate the heat generated by heavy torque loads. If your process requires running the motor at continuously low speeds, you must install an external forced-ventilation fan to prevent the bearings from overheating.
Frequently Asked Questions (FAQs)
Q: What is the difference between the Bonfiglioli BN and BE motor series?
A: The prefix designates the energy efficiency class. The BN series represents standard efficiency (IE1), while the BE series represents High Efficiency (IE2), consuming less electrical power for the same mechanical output.
Q: Can I run this 50Hz motor on a 60Hz power grid?
A: Yes. Most Bonfiglioli 50Hz motors can operate safely on a 60Hz grid. However, the synchronous speed will increase by 20% (up to 1800 RPM), and you must adjust your machinery to handle this increased rotational speed.
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