UMI-0550EU-B7 Unitronics | 55 kW 3 Phase 380-480VAC | VSD

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

The Unitronics UMI-0550EU-B7 is a high-capacity 55 kW variable frequency drive (VFD) designed for precise speed and torque control of industrial three-phase AC motors. Operating on a 380–480 V AC three-phase supply, this inverter provides reliable performance for demanding applications such as pumps, compressors, conveyors and heavy-duty industrial machinery.

Part of the advanced UMI-B7 series, the drive integrates modern motor control technologies including sensorless vector control, closed-loop vector control and SVPWM. These control methods deliver smooth acceleration, accurate torque control and improved energy efficiency across complex automation systems.

Designed for seamless integration into industrial automation architectures, the drive includes built-in Modbus RTU communication via RS-485 and supports optional communication expansion cards for Ethernet and other industrial networks. This flexibility enables direct integration with PLC, HMI and distributed control systems.

Key Advantages

• 55 kW (75 HP) motor control for heavy industrial machinery.
• 380–480 V three-phase input compatible with global industrial power systems.
• Advanced vector motor control algorithms for precise speed and torque regulation.
• Integrated Safe Torque Off (STO) for improved functional safety.
• Built-in Modbus RTU communication for PLC and automation system integration.
• Expandable architecture supporting communication, encoder and I/O expansion cards.

Key Features

• Variable frequency drive (VFD) for industrial AC motor speed control.
• Rated motor power: 55 kW / 75 HP.
• Input voltage: 380–480 V AC three-phase.
• Output frequency range up to 400 Hz.
• Integrated Modbus RTU RS-485 communication.
• Multiple analogue and digital I/O for flexible system control.
• Removable keypad interface for configuration and diagnostics.
• Supports asynchronous induction motors and permanent-magnet synchronous motors.

Technical Specifications

• Manufacturer: Unitronics
• Series: UMI-B7 Variable Frequency Drives
• Model: UMI-0550EU-B7
• Rated motor power: 55 kW (75 HP)
• Input voltage: 380–480 V AC, three-phase
• Input frequency: 50 / 60 Hz (47–63 Hz range)
• Output frequency range: 0–400 Hz
• Supported motors: Asynchronous induction and permanent-magnet synchronous motors
• Overload capacity: 150% for 60 s, 180% for 10 s, 200% for 1 s
• Communication: Modbus RTU RS-485 with optional communication cards
• Protection rating: IP20
• Cooling method: Forced air cooling

Industrial Motor Control and Automation

Variable frequency drives regulate the frequency and voltage supplied to electric motors, allowing precise control of motor speed and torque. This enables improved energy efficiency, reduced mechanical wear and enhanced process stability across industrial systems.

The Unitronics UMI-B7 series offers a wide power range from small fractional-kilowatt drives to large industrial systems up to hundreds of kilowatts, allowing engineers to standardise drive technology across multiple machine platforms.

Typical Applications

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

Trusted by Automation Engineers

Unitronics UMI-B7 drives are widely deployed by machine builders and automation engineers for reliable and efficient motor control in industrial environments.