RF167-DRN315S4 Helical Gear Unit by SEW-EURODRIVE
The SEW-EURODRIVE RF167-DRN315S4 is a robust helical gearmotor designed for heavy-duty industrial applications. It combines the high-capacity RF167 flange-mounted helical gear unit with the energy-efficient DRN315S4 IE3 premium efficiency motor. This compact, coaxial drive solution delivers high torque density, smooth operation, and exceptional reliability, making it ideal for demanding sectors like material handling, mining, and heavy machinery.
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Estimated Delivery Date: Sep 05-Sep 05
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Specifications
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When deploying the SEW-EURODRIVE RF167-DRN315S4 helical gear unit in heavy-duty industrial environments, ensuring optimal thermal management is critical. While standard motor circuit breakers offer adequate protection against overloads during regular operation—especially with low starting frequencies, brief start-ups, and moderate starting currents—they are not always sufficient for extreme conditions. Circuit breakers are typically set to the rated motor current, but they cannot fully protect against thermal buildup during high-inertia starts or when switching operations exceed 60 cycles per hour.
The PTC Thermistor (TF) Advantage
To safeguard your investment in these demanding scenarios, we strongly recommend integrating Positive Temperature Coefficient (PTC) thermistors (TF) as an additional layer of defense. This system provides comprehensive protection against thermal overload, ensuring your drive system operates safely and efficiently.
How It Works
The PTC thermistor TF system is engineered for precision and reliability:
- Series Configuration: Three PTC thermistors (compliant with the DIN 44080 characteristic curve) are connected in series directly within the motor windings.
- Seamless Integration: These sensors are routed from the terminal box directly to the TF/TH input of your inverter or to a dedicated trip switch in the control cabinet.
- Real-Time Monitoring: By continuously tracking internal temperatures, the system proactively prevents thermal damage before it occurs.
- By upgrading to PTC thermistor protection, you ensure that your SEW RF167-DRN315S4 gearmotor remains protected against the most rigorous thermal stresses, ultimately extending equipment lifespan and minimizing costly unplanned downtime.
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