Get now: Bonfiglioli BN27C4 IEC Asynchronous Motor
Atlantechdrives provides you the BN27C4, a high-quality three-phase asynchronous motor built to international IEC standards. The BN series is the workhorse of industrial automation, known for its robust aluminum frame and consistent electrical performance. This 4-pole motor is designed for continuous duty (S1), providing a stable prime mover for pumps, fans, and various power transmission systems.
- Series: BN – IEC Asynchronous Motors
- Frame Size: 27C (Compact industrial frame)
- Polarity: 4 Poles (Approx. 1400 RPM at 50Hz)
- Protection: IP55 (Dust and water splash protection)
- Insulation Class: Class F (155°C temperature limit)
- Duty Cycle: S1 (Continuous operation optimized)
- Voltage: Global standard compatibility (typically 230/400V)
Efficiency and Construction of the BN Motor Series
The Bonfiglioli BN27C4 is constructed with a die-cast aluminum housing, which offers a perfect balance between structural strength and weight reduction. This housing is also essential for thermal management, as aluminum dissipates heat far more efficiently than steel, allowing the motor to maintain its IE efficiency rating even in warm environments. The internal stator is vacuum-impregnated with high-grade resins to protect the copper windings against vibration and humidity. The 4-pole configuration provides a balanced torque-to-speed ratio, making the BN27C4 ideal for applications that require a steady startup under load. As part of the Bonfiglioli ecosystem, this motor is designed to integrate perfectly with various worm gearboxes, providing a unified and reliable drive solution that meets modern industrial standards for performance and low energy consumption. The internal bearings are life-lubricated to ensure long-term mechanical reliability without the need for frequent intervention.
Maintenance: Prolonging Motor Life
For the BN27C4, maintenance is focused on bearing health and thermal airflow. We recommend a monthly inspection of the rear fan cowl to ensure no dust or debris has blocked the airflow over the cooling fins. Dust acts as an insulator and can lead to winding failure due to localized overheating. The bearings in the BN27C4 are life-lubricated; however, if the motor is used in high-vibration environments, an annual acoustic check is recommended. If any electrical resistance changes are detected during routine testing, the vacuum-impregnated windings should be checked for moisture ingress. Using genuine Bonfiglioli gaskets and seals during any terminal box intervention is critical for maintaining the IP55 protection rating and preventing short circuits in humid industrial conditions.
FAQs
Q: Can the BN27C4 be controlled with an inverter (VFD)?
A: Yes, the BN series is fully compatible with Variable Frequency Drives. We recommend using shielded cables to prevent EMI and setting the carrier frequency according to Bonfiglioli’s technical guidelines to protect the insulation.
Q: What does the Class F insulation represent?
A: It indicates that the motor is built with materials that can safely withstand temperatures up to 155°C, providing a high safety margin during peak loads.
Q: Is this motor suitable for outdoor use?
A: With its IP55 rating, it is protected against dust and water jets. For extreme outdoor exposure, we recommend an additional protective rain canopy.
Explore our full catalog of Bonfiglioli here.
When outfitting lightweight conveyor systems, this reliable 4-pole motor provides the perfect input power for compact reduction units like the MVF277F worm gearbox.
