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UMI-S0409 Unitronics UMI-B7, 5.5kW Brk Res.1000W, 480V
Unitronics UMI-S0409 dynamic braking resistor with 85 Ohm resistance and 1000 W braking power, designed for selected 5.5 kW 400-480 V three-phase variable frequency drive applications.
£23.80
Why Choose the Unitronics UMI-S0409 Braking Resistor?
The Unitronics UMI-S0409 is a high-performance dynamic braking resistor designed for use with compatible Unitronics variable frequency drives (VFDs). Engineered to dissipate regenerative energy generated during motor deceleration, this braking resistor improves stopping performance, reduces braking times and helps protect drive systems from DC bus overvoltage conditions.
During rapid motor deceleration, excess energy is returned to the drive's DC bus. The UMI-S0409 safely converts this regenerative energy into heat, allowing controlled braking performance while preventing nuisance drive trips and overvoltage faults. This makes it ideal for demanding industrial applications requiring frequent starts, stops and precise speed control.
Designed for 400-480 V three-phase drive systems, the UMI-S0409 features a resistance rating of 85 Ω and a braking power rating of 1000 W, making it suitable for selected 5.5 kW (7.5 HP) Unitronics VFD applications.
Key Advantages
- Designed for compatible Unitronics VFD systems.
- Improves motor deceleration performance.
- Helps prevent DC bus overvoltage faults.
- 85 Ω resistance rating.
- 1000 W braking power capacity.
- Suitable for demanding industrial automation applications.
Key Features
- Unitronics UMI-S0409 braking resistor.
- Designed for dynamic braking applications.
- 85 Ω resistance value.
- 1000 W braking power rating.
- Compatible with selected 400-480 V drives.
- Suitable for 5.5 kW (7.5 HP) drive applications.
- Industrial-grade construction.
- Supports rapid motor deceleration.
Reliable Dynamic Braking Performance
Dynamic braking resistors are essential components in variable frequency drive systems where rapid stopping and controlled deceleration are required. By dissipating excess regenerative energy, the UMI-S0409 enables faster stopping performance while helping protect the drive from overvoltage conditions.
Its industrial-grade design makes it suitable for a wide range of automation and machine-building applications where precise motion control and dependable braking performance are critical to productivity and equipment protection.
Typical Applications
- Conveyor systems.
- Material handling equipment.
- Packaging machinery.
- Industrial hoists and lifting equipment.
- Machine tools.
- General industrial automation systems.
Technical Specifications
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| Product Series | Unitronics Servo / Drives | |
|---|---|---|
| Device Type | Drive / Servo Accessory | |
| Power | 5.5 kW | |
| Voltage | 480 V | |
| Phase | Three Phase | |
| Product type | Dynamic braking resistor | |
| Resistance | 85 Ω | |
| Braking power | 1000 W | |
| Input voltage compatibility | 400-480 V AC | |
| Input phases | Three-phase | |
| Compatible drive rating | 5.5 kW | |
| Compatible motor rating | 7.5 HP | |
| Duty cycle | 10% ED | |
| Application | Dynamic motor braking | |
| Brand | Unitronics |
Frequently Asked Questions
What is the Unitronics UMI-S0409 used for?
The UMI-S0409 is a dynamic braking resistor used to dissipate regenerative energy generated during motor deceleration in VFD applications.
What is the resistance value of the UMI-S0409?
The braking resistor has a resistance rating of 85 Ω.
What is the braking power rating?
The UMI-S0409 provides a braking power capacity of 1000 W.
Which drive sizes is it designed for?
The resistor is designed for selected 5.5 kW (7.5 HP) Unitronics drive applications operating on 400-480 V three-phase supplies.
Why is a braking resistor required?
A braking resistor dissipates excess regenerative energy during motor deceleration, helping prevent overvoltage faults and improving stopping performance.
Trusted for Industrial Motion Control
Unitronics braking resistors are trusted by automation engineers and machine builders to provide reliable dynamic braking performance, improved deceleration control and enhanced protection for industrial drive systems.
