TBU Series Braking Unit for VFD
The function of the braking unit is to divert into a braking resistor the regenerative energy produced in the process of decelerating the motor, converting that energy into heat. Regenerative energy flows from the motor into the inverter DC Bus, manifested as increased bus voltage. The advantage gained using the DBU is improved braking performance and shorter deceleration time of the load.
Specifications
| ModelSpecifications | Usage Occasion | Power Range | Rated
Current |
Peak
Current |
| General Mode | ||||
| TBU-4T1L | dynamic braking | 0.75-22KW | 6A | 33A |
| TBU-4T1SA | dynamic braking | 30-55 KW | 9A | 50A |
| TBU-4T3SA | dynamic braking | 75-132 KW | 10A | 100A |
| TBU-4T3H | dynamic braking | 75-132 KW | 40A | 150A |
| TBU-4T4H | dynamic braking | 150-220 KW | 50A | 200A |
| TBU-4T5H | dynamic braking | 250-315 KW | 60A | 300A |
| TBU-4T6H | dynamic braking | 300-450 KW | 70A | 400A |
| Economical Mode | ||||
| TBU-4T1G | dynamic braking | 30-55 KW | 10A | 50A |
| TBU-4T2G | dynamic braking | 75-132 KW | 12A | 100A |
| High-performance Mode | ||||
| TBU-4T3HA | dynamic braking | 160-180 KW | 70A | 150A |
| TBU-4T4HA | dynamic braking | 220-250 KW | 85A | 200A |
| TBU-4T5HA | dynamic braking | 280-400 KW | 120A | 300A |
Notice:
Rated current is maximum average current when braking unit working. Peak current is maximum current allowed during working, its running time should last less than 20 seconds.
| Item | Specification | |
| Power supply | Network
voltage |
Tri-phase 220V/380V/460/660V（depend on models） |
| Network
frequency |
45Hz～65Hz | |
| Control | Brake mode | Automatic voltage trace |
| Reaction time | Within 1mS, multiple noise filter
algorithm |
|
| Operation
voltage |
Depend on different models | |
| Hysteresis
voltage |
less than 10V | |
| Protection
function |
Over-heat, over-current, short
circuit |
|
| Overheat
protection |
75℃ | |
| Digit input port | *1pcs, set up functions by
software |
|
| Digit input port | *1pcs, set up functions by
software |
|
| Display and
Settings |
Status indicator | There are power indicator &
working indicator for all models. And power indicator, malfunctions indicator, fuse-break indicator and brake-status indicator for some models in operation panel. |
| Operation
monitoring & controlling |
Some models with operation
panels have operation parameters to monitor AC bus-bar voltage & internal temperature etc. |
|
| Operation
voltage set-up |
TBU-4T-3HA/4HA/5HA set up
via operation panel, and others set up when leaving factory. |
|
| Environment | Installing place | Indoor, elevation no more than
1000m, no sunshine, no electro-conductive powder & corrosive gas |
| temperature | -10~40℃，well-ventilated | |
| humidity | Under 90％RH No dew | |
| Vibration angle | Under 0.5g | |