SEW BW147
Based on the information available, the SEW BW147 module is a braking resistor from SEW-EURODRIVE. Here’s a breakdown:
Product Name: BW147 Braking Resistor
Product Description: The SEW BW147 is a braking resistor designed for use with SEW-EURODRIVE frequency inverters (like MOVITRAC®). Braking resistors are used to dissipate the energy generated by the motor during braking or deceleration, preventing overvoltage on the DC bus of the inverter. The BW147 is a wire-wound resistor with a temperature switch for thermal overload protection. The “-T” suffix in some listings (BW147-T) also indicates the presence of a temperature switch.
Product Parameters (Typical):
- Resistance Value (RBW): 47 Ω ± 10%
- Continuous Braking Power (100% cdf): 1.2 kW (This is also often listed as the power rating of the resistor)
- Peak Braking Power: 14.6 kW
- Tripping Current (IF) of External Monitoring Device: 5.1 A
- Degree of Protection: IP20
- Ambient Temperature (ϑamb): -30 °C to +40 °C (Derating applies above 40 °C)
- Power Connections: Screw terminal
- PE Connection: M4 bolt
- Cable Cross Section: 0.5 – 10 mm²
- Tightening Torque (Power & PE): 1.5 – 1.8 Nm
Specifications (Typical):
- Manufacturer: SEW-EURODRIVE
- Series: BW series (specific model BW147 or BW147-T)
- Product Type: Braking Resistor
