UMI-S0058 Unitronics UMI 5.5kW Brk Res. 1000W, 480V

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). Engineered to safely dissipate regenerative energy generated during motor deceleration, it helps improve braking performance, protect drive electronics and prevent DC bus overvoltage faults in demanding industrial applications.

When motors decelerate rapidly, excess energy is returned to the drive's DC bus. The UMI-S0058 converts this regenerative energy into heat, allowing the drive to maintain stable operation while delivering faster and more controlled stopping performance. This makes it ideal for applications requiring frequent acceleration and deceleration cycles, high inertia loads and precise machine control.

Designed for 380-480 V AC three-phase systems, the UMI-S0058 features a 1000 W braking power rating, an 85 Ω resistance value and is suitable for applications using drives rated up to 5.5 kW (7.5 HP). Its industrial-grade construction ensures dependable operation in manufacturing, material handling and automation environments.

Key Advantages

• Improves dynamic braking performance in VFD applications.
• Helps prevent DC bus overvoltage conditions during deceleration.
• 1000 W braking power rating for efficient energy dissipation.
• Compatible with 380-480 V AC three-phase systems.
• Suitable for drives rated up to 5.5 kW / 7.5 HP.
• Industrial-grade design for reliable long-term operation.

Key Features

• Unitronics UMI braking resistor series.
• 1000 W braking power.
• 5.5 kW (7.5 HP) drive compatibility.
• 85 Ω resistance value.
• 380-480 V AC three-phase operation.
• Designed for regenerative energy dissipation.
• Suitable for high-inertia applications.
• 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-S0058 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, frequent stopping cycles or precise motor 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.