Unitronics UMI-0550EE-B1 variable frequency drive, a 55 kW three phase AC inverter with integrated STO safety, Modbus RTU communication and advanced motor control for industrial automation applications.
£2,287.60
The Unitronics UMI-0550EE-B1 is a heavy-duty AC variable frequency drive (VFD) designed for precise speed and torque control of three-phase motors in demanding industrial automation, machinery and process applications. As part of the robust Unitronics UMI-B1 EU series, it delivers dependable inverter performance with integrated safety, communication and motor control capabilities.
Engineered for high-power industrial applications, the UMI-0550EE-B1 helps improve energy efficiency, reduce mechanical wear and optimise process control. The drive incorporates advanced motor control algorithms, built-in communication interfaces and integrated Safe Torque Off (STO) functionality for enhanced operational safety and automation system integration.
With a rated output power of 55 kW / 75 HP and a three-phase 380–480 V AC supply, the UMI-0550EE-B1 is ideal for large industrial motors used in pumps, fans, compressors, conveyors, production machinery and heavy-duty manufacturing systems.
Variable frequency drives such as the Unitronics UMI-0550EE-B1 regulate motor speed by adjusting output voltage and frequency. This enables industrial equipment to operate more efficiently while improving process accuracy, reducing energy consumption and minimising mechanical stress on motors and driven equipment.
The UMI-B1 series is designed for machine builders, panel builders and industrial automation engineers requiring dependable inverter performance in demanding environments. Integrated safety, communication and control features make it suitable for both new installations and retrofit projects.
| Power | 55 kW |
|---|---|
| Current | 115 A |
| Voltage | 480 V |
| Phase | Three Phase |
| IP Rating | IP20 |
| Series | UMI-B1 EU Series |
| Product type | AC variable frequency drive |
| Rated output power | 55 kW |
| Horsepower rating | 75 HP |
| Rated output current | 115 A |
| Input voltage | 380–480 V AC |
| Input phases | 3-phase |
| Input frequency | 50 / 60 Hz |
| Output frequency | 0–400 Hz |
| Control methods | Sensorless Vector Control, V/F Control |
| Safety function | Safe Torque Off (STO) |
| Protection rating | IP20 |
| Mounting type | Wall / flange mounting |
| Overload capacity | 150% for 60 s, 180% for 10 s, 200% for 1 s |
| EMC Filter | None |
This drive controls the speed and torque of three-phase AC motors used in industrial automation, manufacturing and process applications.
The drive supports motors with a rated output power of approximately 55 kW / 75 HP.
The UMI-0550EE-B1 operates from a three-phase 380–480 V AC supply.
Yes, the drive includes integrated Safe Torque Off (STO) functionality certified for industrial machine safety applications.
Yes. The drive supports RS-485 Modbus RTU communication for integration with PLCs, HMIs and industrial automation networks.
Unitronics UMI series variable frequency drives are widely used by machine builders and automation engineers to deliver reliable motor control, improved energy efficiency and flexible integration into modern industrial systems.
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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...