BU20 Braking Unit for VFD

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BU20

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
Model of braking unit	Maximum braking current	Minimum braking resistor	Light load	Heavy load
BU20-3-075	75A	10Ω	55-90KW	18.5-45KW
BU20-3-150	150A	6.2Ω	132-160KW	55-110KW
BU20-3-300	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