UMI-0550CU-B7 Unitronics | 55 kW 3 Phase 200-240 VAC | VSD

Why Choose the Unitronics UMI-0550CU-B7 Variable Frequency Drive?

The Unitronics UMI-0550CU-B7 is a high-power 55 kW variable frequency drive (VFD) designed to deliver precise speed and torque control for industrial three-phase AC motors. Built for operation on a 200–240 V three-phase power supply, this drive provides reliable motor performance for demanding applications such as pumps, conveyors, compressors and HVAC equipment.

Part of the advanced UMI-B7 series, the drive integrates modern motor control technology and flexible automation connectivity. The platform supports V/F control, sensorless vector control and torque control, enabling stable torque output, smooth acceleration and improved energy efficiency across industrial processes.

The drive integrates easily with PLC and HMI systems thanks to built-in Modbus RTU communication via RS-485, while optional expansion cards allow additional communication and I/O capabilities. This architecture allows the inverter to function as a standalone VFD or as part of a fully integrated automation platform.

Key Advantages

• 55 kW (75 HP) motor control suitable for mid-to-large industrial applications.
• 200–240 V three-phase input designed for low-voltage industrial installations.
• Advanced vector motor control algorithms for accurate speed and torque regulation.
• Built-in Safe Torque Off (STO) for improved functional safety.
• Integrated EMC filter to minimise electrical interference.
• Expandable architecture supporting communication, encoder and I/O cards.

Key Features

• Variable frequency drive (VFD) for industrial AC motor speed control.
• Rated motor power: 55 kW / 75 HP.
• Input voltage: 200–240 V AC three-phase.
• Output frequency range: up to 400 Hz.
• Integrated Modbus RTU RS-485 communication.
• Built-in EMC filter to reduce electromagnetic interference.
• Optional dynamic braking unit for rapid deceleration applications.
• Designed for integration with Unitronics PLC and HMI control platforms.

Technical Specifications

• Manufacturer: Unitronics
• Series: UMI-B7 Variable Frequency Drives
• Model: UMI-0550CU-B7
• Rated motor power: 55 kW (75 HP)
• Input voltage: 200–240 V AC, three-phase
• Input frequency: 50 / 60 Hz
• Output frequency range: 0–400 Hz
• Control methods: V/F control, sensorless vector control (SVC), torque control
• Communication: Modbus RTU RS-485
• Protection rating: IP20
• Cooling method: Forced air cooling
• Dimensions: approx. 680 mm × 325 mm × 365 mm

Industrial Motor Control and Energy Efficiency

Variable frequency drives regulate the voltage and frequency supplied to electric motors to control speed and torque. This allows motors to operate only at the required speed, improving energy efficiency while reducing mechanical wear and maintenance costs. Modern VFD platforms such as the Unitronics UMI-B7 series also support advanced closed-loop control and industrial network integration.

Typical Applications

• Industrial pumps and water treatment systems.
• HVAC fans and ventilation equipment.
• Conveyor and material handling systems.
• Compressors and manufacturing machinery.
• Heavy-duty industrial motor speed control.

Trusted by Automation Engineers

Unitronics UMI-B7 drives are widely used by machine builders and automation engineers to provide reliable and energy-efficient motor control in industrial environments.