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MITSUBISHI Inverter
Brand: MITSUBISHI -
Cat: Inverter
Code:FR-A520-5.5K
| Combination name | Availability | Price |
|---|---|---|
Three-Phase Vector Inverter 5.5 kW – MITSUBISHI FR-A520-5.5K
The FR-A520-5.5K is a three-phase 5.5 kW vector frequency inverter (“Variable Frequency Drive”, 200 V voltage class) manufactured by Mitsubishi Electric, belonging to the FREQROL-A500 series (FR-A520 line). Designed for industrial applications and CNC machine tools, it converts three-phase mains voltage into variable-frequency AC output (0.5–400 Hz) using advanced magnetic flux vector control. It supports V/f and vector control modes (sensorless and encoder-feedback); it features analogue reference inputs for speed control and a serial interface for communication with the CNC system.
The frequency inverter is the core of the AC induction motor drive system: it converts fixed-frequency mains voltage into variable voltage and frequency, enabling precise control of motor speed and torque. In the event of failure, the controlled motor becomes unmanageable, causing the immediate shutdown of the axis or spindle and rendering the machine completely inoperable until the component is replaced or repaired.
Mitsubishi Electric is one of the world’s leading manufacturers of industrial automation systems, renowned for the reliability and longevity of its FREQROL® inverter range. The A500 series is legacy / discontinued, superseded by the A700 and A800 series; spare parts are available exclusively as used, surplus, or through specialist repair services.
Main Technical Specifications
| Type | Three-phase vector frequency inverter (Variable Frequency Drive / VFD) |
| Part number | FR-A520-5.5K (FRA52055K) |
| Brand | Mitsubishi Electric – FREQROL series |
| Series / Family | FREQROL-A500, FR-A520 line (200 V voltage class) |
| Known application | CNC machine tools, pumps, compressors, fans, industrial conveyor systems |
| Function | Three-phase AC motor speed and torque control via variable voltage and frequency |
| Input voltage | 3-phase 200–240 V AC ±10%, 50/60 Hz |
| Rated output power | 5.5 kW |
| Rated output current | ~24–25 A |
| Output frequency range | 0.5–400 Hz |
| Control method | V/f; advanced magnetic flux vector control (sensorless / encoder feedback) |
| Speed reference input | Analogue ±10 V and 4–20 mA; multi-function digital inputs |
| Interfaces / connectors | Control terminal strip; RS-485 serial port (optional); external operator panel connector |
| Protection degree | IP20 (panel mounting) |
| Weight | ~4–7 kg |
| Dimensions | ~165–200 × 320–380 × 165–200 mm W×H×D |
| Production status | Legacy / discontinued — used/surplus/repair only |
