Unitronics UMI-0550CU-B7 variable frequency drive featuring 55 kW output power, 200-240 V AC three-phase input, Modbus RTU communication, advanced vector control and integrated Safe Torque Off functionality for industrial automation applications.
£3,348.80
The Unitronics UMI-0550CU-B7 is a high-capacity AC variable frequency drive (VFD) engineered for precise speed, torque and motor control in demanding industrial automation applications. As part of the advanced Unitronics UMI-B7 series, it combines powerful motor control, integrated safety functions and flexible communication options to support modern machine-building and process control requirements.
Featuring advanced control technologies including SVPWM, Sensorless Vector Control (SVC) and Closed-Loop Vector Control, the UMI-0550CU-B7 delivers excellent speed regulation, high starting torque and reliable performance under varying load conditions. Its expandable architecture supports communication, encoder and I/O expansion modules, allowing seamless integration into industrial automation systems.
With a rated output power of 55 kW (75 HP), an approximate output current of 200 A and operation from a three-phase 200–240 V AC supply, the UMI-0550CU-B7 is ideally suited to pumps, compressors, conveyors, HVAC equipment and heavy-duty industrial machinery. Integrated Safe Torque Off (STO) functionality enhances machine safety while reducing system complexity.
Variable frequency drives such as the Unitronics UMI-0550CU-B7 regulate motor speed by controlling output voltage and frequency. This allows industrial machinery to operate more efficiently, reduces energy consumption, minimises mechanical wear and improves overall process performance.
The UMI-B7 platform has been developed for integration into modern automation systems. Advanced control functionality, flexible communications and compatibility with both induction and permanent magnet motors make it a versatile solution for demanding industrial applications.
| Power | 55 kW |
|---|---|
| Current | 200 A |
| Voltage | 240 V |
| Phase | Three Phase |
| IP Rating | IP20 |
| Series | UMI-B7 |
| Product type | AC variable frequency drive |
| Rated output power | 55 kW / 75 HP |
| Rated output current | Approx. 200 A |
| Input voltage | 200–240 V AC |
| Input phases | 3-phase |
| Input frequency | 50 / 60 Hz (47–63 Hz) |
| Output frequency | 0–400 Hz |
| Control methods | SVPWM, sensorless vector control, closed-loop vector control |
| Supported motors | Asynchronous induction motors and permanent magnet synchronous motors |
| Overload capacity | 150% for 60 s, 180% for 10 s, 200% for 1 s |
| Protection rating | IP20 |
| Cooling method | Air cooling |
| Mounting type | Flange, floor or wall mounting |
| Dimensions (H × W × D) | Approx. 682 × 325 × 365 mm |
| Safety function | Safe Torque Off (STO) |
| EMC Filter | None |
This drive controls the speed and torque of three-phase AC motors in industrial automation, process control and machinery applications.
The UMI-0550CU-B7 is rated for motors up to 55 kW (75 HP).
The drive operates from a three-phase 200–240 V AC power supply.
Yes, it includes integrated Safe Torque Off (STO) functionality to help prevent unintended motor operation.
Yes, it includes Modbus RTU communication and supports optional communication expansion modules for integration with PLCs and industrial networks.
Unitronics UMI-B7 variable frequency drives are trusted by automation engineers and machine builders worldwide for delivering reliable motor control, flexible integration and efficient operation across a wide range of industrial applications.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...