Purchase now: Bonfiglioli BN 80B 4 AC Electric Motor
Purchase now: Atlantechdrives provides you the BN 80B 4 230/400-50 IP55, a heavy-duty, highly resilient three-phase asynchronous AC induction motor manufactured by the power transmission experts at Bonfiglioli. Designed in strict accordance with IEC international standards, the BN 80B is the ultimate universal drop-in replacement motor for industrial manufacturing facilities. This specific model features a robust 4-pole stator winding, delivering a synchronous speed of 1500 RPM at 50Hz (typically running around 1400-1440 RPM under nominal load). This makes it the ideal prime mover for coupling to worm gears, inline helical reducers, large centrifugal pumps, and heavy-duty industrial fans. Encased in a durable, heat-dissipating aluminum housing with an IP55 protection rating, this motor thrives in harsh environments filled with airborne factory dust, metal shavings, and moisture.
Technical Specifications of the BN 80B 4 Motor
The BN series is built for endurance. It utilizes premium-grade copper stator windings and high-temperature Class F insulation, ensuring the motor can withstand heavy continuous duty cycles and high internal temperatures without experiencing electrical breakdown.
- Part Number: BN 80B 4 230/400-50 IP55
- Motor Type: 3-Phase AC Asynchronous Induction Motor
- Frame Size: IEC 80B
- Number of Poles: 4-Pole (1500 RPM synchronous at 50Hz)
- Voltage Requirement: 230V Delta (Δ) / 400V Star (Y)
- Frequency: 50 Hz
- Protection Rating: IP55 (Dust tight and low-pressure water jet protected)
- Cooling Method: IC411 (Totally Enclosed Fan Cooled – TEFC)
Expert Installation Advice: Star-Delta Wiring and VFD Integration
Connecting a 3-phase motor incorrectly guarantees instant destruction. Expert Tip: The nameplate clearly designates «230/400V». This indicates that the individual copper coils inside the stator are rated for exactly 230 Volts. If your factory power grid provides a standard 400V 3-phase supply, you must arrange the brass terminal links inside the junction box into the «Star» (Y) configuration. This connects the coils in a way that safely distributes the 400V. If you mistakenly wire the motor in «Delta» (Δ) on a 400V grid, the coils will absorb almost double their rated voltage, melting the internal insulation and catching fire within seconds. Furthermore, because this motor features Class F insulation, it is «Inverter Duty» rated. You can safely connect it to a Variable Frequency Drive (VFD) to achieve precise speed control and soft-starting capabilities, reducing mechanical wear on your gearboxes.
Maintenance and Thermal Overload Protection
The BN 80B 4 is a TEFC (Totally Enclosed Fan Cooled) motor, meaning it relies entirely on the rear plastic fan to blow ambient air across the aluminum cooling fins. During routine maintenance, you must ensure the fan cowl is completely free of dust, lint, or debris blockages. If the airflow is restricted, the motor will rapidly overheat. Always protect your motor investment by installing a properly sized thermal overload relay or motor protection circuit breaker (MPCB) in your control panel. Set the dial on the MPCB exactly to the Full Load Amperage (FLA) listed on the motor’s silver nameplate to ensure the breaker trips before the copper windings melt during a mechanical jam.
Frequently Asked Questions (FAQs)
Q: Can I run this 50Hz motor in a facility with 60Hz power?
A: Yes. Most Bonfiglioli 50Hz induction motors can operate safely on a 60Hz power grid. However, you must be aware that the synchronous speed will increase by 20% (from 1500 RPM to 1800 RPM), and the motor will draw slightly different running currents. Adjust your gearbox ratios accordingly.
Q: What does the «B» mean in the 80B frame size?
A: The IEC 80 frame size dictates the physical dimensions (shaft height, bolt hole spacing). The «B» (as opposed to an «A» or «C») simply designates the length of the stator core, which correlates to the specific horsepower/kilowatt rating of the motor within that frame size.
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