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UMI-S0058 Unitronics UMI 5.5kW Brk Res. 1000W, 480V
MPN: UMI-S0058
Alt. SKU: UMIS0058
Special Price
£108.89
£90.74
Regular Price
£128.10
Why Choose the Unitronics UMI-S0058 Braking Resistor?
The Unitronics UMI-S0058 is a heavy-duty dynamic braking resistor designed for use with compatible Unitronics variable frequency drives (VFDs). It dissipates regenerative energy generated during motor deceleration, allowing rapid and controlled stopping while protecting the drive from DC bus overvoltage conditions.
When an AC motor slows down, its rotating inertia can cause it to act as a generator and feed energy back into the drive. Without a braking resistor this energy can raise the DC bus voltage and trigger drive faults. The UMI-S0058 converts this excess electrical energy into heat, ensuring stable drive operation and safe braking in industrial automation systems.
Designed for 380–480 V three-phase drive systems, the UMI-S0058 supports motors rated around 5.5 kW (7.5 HP). Its high braking capacity makes it suitable for applications requiring strong deceleration performance in machinery, conveyors and automated production equipment.
Key Features
- Dynamic braking resistor for industrial variable frequency drives.
- Designed for 380–480 V three-phase VFD systems.
- Dissipates regenerative energy during motor braking and deceleration.
- Helps prevent DC bus overvoltage faults inside the drive.
- Supports drive systems rated around 5.5 kW (7.5 HP).
- High braking capacity for demanding automation applications.
Technical Specifications
- Manufacturer: Unitronics
- Model: UMI-S0058
- Product type: Dynamic braking resistor
- Voltage rating: approx. 380–480 V AC
- Phase compatibility: Three-phase drive systems
- Resistance: 85 Ω
- Braking power: approx. 1000 W
- Rated motor power: approx. 5.5 kW (7.5 HP)
- Dimensions: approx. 380 × 50 × 100 mm
- Application: Energy dissipation for VFD braking systems
Typical Applications
- Variable frequency drive braking systems.
- Industrial conveyors and material handling equipment.
- Packaging and production machinery.
- Automation systems requiring rapid motor deceleration.
- Machine tools and motion control equipment.
Frequently Asked Questions
What is the UMI-S0058 used for?
The UMI-S0058 is a braking resistor used with a variable frequency drive to dissipate regenerative energy generated during motor deceleration.
Why are braking resistors used with VFDs?
When a motor slows down it generates electrical energy that flows back into the drive. A braking resistor safely converts this energy into heat to prevent overvoltage faults.
What drive systems is this resistor designed for?
The UMI-S0058 is designed for three-phase drive systems operating around 380–480 V AC.
What motor size is it typically used with?
This braking resistor is typically used with drives controlling motors around 5.5 kW (7.5 HP).
Trusted by Automation Engineers
Dynamic braking resistors are widely used in industrial VFD systems to ensure controlled motor deceleration and protect drives from regenerative overvoltage conditions.
| Packed Quantity | 1 |
|---|---|
| Manufacturer | Unitronics |
| Manufacturer Part Number | UMI-S0058 |
| Alternative Product SKU | UMIS0058 |
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