Why Choose the Unitronics UMI-S0065 Braking Resistor?
The Unitronics UMI-S0065 is a high-capacity dynamic braking resistor designed for use with compatible Unitronics variable frequency drives (VFDs). Engineered for demanding industrial applications, it safely dissipates regenerative energy generated during motor deceleration, helping improve braking performance, protect drive electronics and prevent DC bus overvoltage faults.
During rapid deceleration, motors return excess energy to the drive's DC bus. The UMI-S0065 converts this regenerative energy into heat, allowing the drive to maintain stable operation while delivering fast and controlled stopping performance. This makes it ideal for heavy-duty machinery, material handling systems and industrial processes requiring rapid braking and precise motor control.
Designed for 480 V AC three-phase systems, the UMI-S0065 features a 13 kW braking power rating, a 4.5 Ω resistance value and is suitable for applications using drives rated from 90 kW to 110 kW (120 HP to 150 HP). Its industrial-grade construction ensures dependable operation in high-power automation and manufacturing environments.
Key Advantages
- Improves dynamic braking performance in high-power VFD applications.
- Helps prevent DC bus overvoltage conditions during rapid deceleration.
- 13 kW braking power rating for efficient energy dissipation.
- Compatible with 480 V AC three-phase systems.
- Suitable for drives rated from 90 kW to 110 kW.
- Industrial-grade construction for reliable long-term operation.
Key Features
- Unitronics UMI braking resistor series.
- 13 kW braking power.
- 90-110 kW (120-150 HP) drive compatibility.
- 4.5 Ω resistance value.
- 480 V AC three-phase operation.
- Designed for regenerative energy dissipation.
- Suitable for high-inertia industrial applications.
- Industrial installation design.
Braking resistors are critical components in high-power variable frequency drive systems where motors frequently decelerate under load. During braking, regenerative energy is returned to the drive DC bus. The UMI-S0065 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 requiring rapid speed changes, high inertia braking or precision motor control.
Typical Applications
- Conveyor and material handling systems.
- Cranes, hoists and lifting equipment.
- Heavy industrial machinery.
- Process automation systems.
- Mining and aggregate equipment.
- OEM machinery and manufacturing systems.
