Purchase now: Bonfiglioli BN 100LA 4 AC Electric Motor
Purchase now: Atlantechdrives provides you the BN 100LA 4 230/400-50 IP55, a rugged, high-performance three-phase asynchronous AC induction motor manufactured by the global power transmission experts at Bonfiglioli. Designed to comply strictly with IEC international standards, the BN series is a universal workhorse built for extreme reliability across all heavy industrial sectors. This specific model is built on an IEC 100LA aluminum frame, featuring an extended stator core (designated by the «LA») to deliver increased horsepower and torque within a compact footprint. Engineered with a 4-pole stator winding and operating at 50Hz, it delivers a synchronous speed of 1500 RPM (typically around 1420-1460 RPM under full load). It provides the ideal balance of rotational speed and starting torque for driving large worm gears, heavy inline helical reducers, massive centrifugal pumps, and industrial blowers. Protected by a highly durable IP55 rating, it effectively repels factory dust and water jets.
Technical Specifications of the BN 100LA 4 Motor
This motor utilizes premium-grade copper windings and high-quality Class F insulation, ensuring it can withstand significant internal heat generation without electrical breakdown. The dynamically balanced rotor guarantees whisper-quiet, vibration-free operation.
- Part Number: BN 100LA 4 230/400-50 IP55
- Motor Type: 3-Phase AC Induction Motor
- Frame Size: IEC 100LA (Long core for increased torque)
- 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 and water jet protected)
- Cooling Method: IC411 (Totally Enclosed Fan Cooled – TEFC)
Expert Installation Advice: Star-Delta Terminal Wiring
Incorrect wiring at the terminal box is the number one cause of instant motor destruction. Expert Tip: The nameplate of the BN 100LA 4 explicitly states «230/400V». This means the individual copper coils inside the motor are designed to handle a maximum of 230 Volts across them. If your factory provides a standard 400V 3-phase power supply, you must arrange the brass bridging links inside the terminal box into the «Star» (Y) configuration. This safely distributes the 400V across two coils in series. If you mistakenly wire the terminal block in the «Delta» (Δ) configuration and apply 400V, the coils will receive nearly double their rated voltage. The insulation will melt, and the motor will short out and catch fire within seconds.
Maintenance and VFD Compatibility
The BN 100LA 4 features Class F insulation, making it highly robust and suitable for use with Variable Frequency Drives (VFDs) or inverters. When running this motor via a VFD at very low speeds (below 25 Hz), you must be aware of thermal limitations. Because it is a TEFC motor (Totally Enclosed Fan Cooled), the rear plastic cooling fan is directly attached to the rotor shaft. At low speeds, the fan does not push enough air over the cooling fins to dissipate the heat generated by the copper losses. If you plan to run the motor at continuously low speeds under heavy load, consider adding an external forced-ventilation (servo-fan) unit to the rear of the motor to prevent thermal tripping.
Frequently Asked Questions (FAQs)
Q: Can I run this 50Hz motor in a country with a 60Hz power grid?
A: Yes. Most 50Hz induction motors can be safely operated on a 60Hz grid. However, the synchronous speed will increase by 20% (from 1500 RPM to 1800 RPM), and the motor will draw slightly different amperage. You must adjust your driven machine’s gearing to compensate for the higher output speed.
Q: What does the «LA» mean in the 100LA frame size?
A: The IEC 100 frame size dictates the physical dimensions (shaft height, bolt hole spacing). The «L» stands for Long (referring to the length of the stator core), and the «A» designates the specific power rating within that long core geometry, delivering higher torque than a standard 100L frame.
Do you need more references from this brand? Explore our full catalog of Bonfiglioli here.
When configuring reliable right-angle transmissions, this robust 4-pole motor provides the precise input power required to seamlessly drive advanced units like the F 10 2 H 10 P71 B5 helical bevel gearbox.
