BU20 Braking Unit for VFD
The BU20 braking unit for VFD is mainly used in occasions where the mechanical load is relatively heavy and requires a very fast speed braking. The renewable energy generated by the motor is consumed by the braking resistor, or the regenerative current is reclaimed by the circuit. The features include:
1. simple and beautiful modeling with high security, easy for installation.
2. convenient, flexible, adjustable, user-friendly control section.
3. overheating protection and short circuit protection, improving the reliability of the braking module.
4. fault indication and fault signal output for timely feedback of anomalies.
5. 3 brake tap positions, high precision design.
Braking Unit Output Specifications
The following table is recommended 380V machine selection table.
| Model of braking unit | Maximum braking current | Minimum braking resistor | VFD power | |
| Light load | Heavy load | |||
| 75A | 10Ω | 55-90KW | 18.5-45KW | |
| 150A | 6.2Ω | 132-160KW | 55-110KW | |
| 300A | 3Ω | 220-250KW | 132-200KW | |
Specifications of BU20 Braking Unit for VFD
| Model | BU20-3-075 | BU20-3-(150~300) | |
| Maximum input power | DC800V | ||
| Control | output voltage control, toggle switch | ||
| Parallel connection | none | master slave control mode | |
| Hysteresis voltage | 20V | ||
| Protection | overheating protection, 85 ℃radiator | 85 ℃ radiator overheating protection; short circuit protection | |
| Directions (light emitting diode) | Power, Braking | Power, Braking, Over heating | |
| Environment | Place | indoor venues, elevation of not more than 1000m, no corrosive gasand direct sunlight | |
| Temperature and humidity | -10~40 ℃ | ||
| Vibration | less than 0.5g below 20HZ | ||
| Storage temperature | -25- 60 ℃ | ||
| Installation | wall-mounted | ||
| Protection class | IP20 | ||
| Cooling | natural cooling | forced air cooling | |
