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UMI-S0051 Unitronics UMI 0.75kW Brk Res. 250W, 230V
Unitronics UMI-S0051 braking resistor designed for variable frequency drive applications, featuring 250 W braking power, 150 ohm resistance and compatibility with 200-240 V AC systems.
£31.24
Why Choose the Unitronics UMI-S0051 Braking Resistor?
The Unitronics UMI-S0051 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, it helps improve braking performance, minimise overvoltage faults and enhance overall drive reliability in industrial automation applications.
During rapid deceleration, motors can generate excess energy that is returned to the drive's DC bus. The UMI-S0051 safely converts this energy into heat, allowing drives to maintain stable operation while delivering faster and more controlled stopping performance. This makes it particularly suitable for machinery requiring frequent acceleration and deceleration cycles.
Designed for use with 200-240 V AC single-phase and three-phase systems, the UMI-S0051 features a 250 W braking power rating, a 150 Ω resistance value and is suitable for applications using drives rated up to 0.75 kW (1 HP). Its industrial-grade construction ensures dependable operation in demanding manufacturing and automation environments.
Key Advantages
- Improves dynamic braking performance in VFD applications.
- Helps prevent DC bus overvoltage faults during deceleration.
- 250 W braking power rating for efficient energy dissipation.
- Compatible with 200-240 V AC single-phase and three-phase systems.
- Suitable for drives rated up to 0.75 kW (1 HP).
- Industrial-grade construction for reliable long-term performance.
Key Features
- Unitronics UMI braking resistor series.
- 250 W braking power.
- 0.75 kW (1 HP) drive compatibility.
- 150 Ω resistance value.
- 200-240 V AC operating systems.
- Compatible with single-phase and three-phase drives.
- Designed for regenerative energy dissipation.
- Compact industrial installation design.
Reliable Dynamic Braking for Variable Speed Drives
Braking resistors are essential components in variable frequency drive systems where motors frequently decelerate. During braking, regenerative energy is returned to the drive DC bus. The UMI-S0051 safely dissipates this excess energy, helping maintain stable drive operation while enabling faster and more controlled stopping performance.
This improves machine productivity, protects drive electronics and enhances operational safety in applications that require frequent speed changes, rapid deceleration or precise stopping control.
Typical Applications
- Conveyor and material handling systems.
- Packaging and production machinery.
- Hoists and lifting equipment.
- Industrial fans and pumps.
- Machine tools and automation equipment.
- OEM machinery and manufacturing systems.
Technical Specifications
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| Product Series | Unitronics Servo / Drives | |
|---|---|---|
| Device Type | Drive / Servo Accessory | |
| Coil / Supply Voltage | 200–240 V AC | |
| Power | 0.75 kW | |
| Voltage | 240 V | |
| Phase | Single Phase | |
| Product type | Braking resistor | |
| Braking power | 250 W | |
| Rated power | 0.75 kW | |
| Motor rating | 1 HP | |
| Resistance | 150 Ω | |
| Supply voltage | 200-240 V AC | |
| Phase compatibility | Single-phase and three-phase | |
| Nominal voltage | 220 V AC | |
| Application | Dynamic braking for VFD systems | |
| Mounting | Industrial panel installation |
Frequently Asked Questions
What is the Unitronics UMI-S0051 used for?
The UMI-S0051 is a braking resistor used with compatible variable frequency drives to dissipate regenerative energy generated during motor deceleration.
What braking power does the resistor provide?
The resistor provides a 250 W braking power rating.
What drive size is it suitable for?
The UMI-S0051 is designed for applications using drives rated up to approximately 0.75 kW (1 HP).
What is the resistance value?
The braking resistor has a nominal resistance value of 150 Ω.
Can it be used with single-phase and three-phase systems?
Yes, the UMI-S0051 is suitable for both single-phase and three-phase 200-240 V AC drive applications.
Trusted for Reliable Drive Braking Performance
Unitronics braking resistors are widely used in industrial automation systems to improve deceleration performance, protect VFDs from overvoltage conditions and enhance machine control during demanding operating cycles.
