Mitsubishi Electric FR-A820-18.5K FREQROL-A800 VFD Inverter

Description

Designed for heavy-duty industrial motor control, the Mitsubishi Electric FR-A820-18.5K delivers precise speed and torque regulation across high-demand automation architectures. Operating on a three-phase input, this high-performance variable frequency drive features advanced vector control algorithms to optimize motor efficiency and system reliability. Designed for integration into demanding environments, its robust electrical design accommodates voltage fluctuations and handles high load dynamics, making it an essential component for critical machinery and process control systems.

Features

• Real sensorless vector control and perfect closed-loop vector control capability.
• Robust tolerance to line voltage fluctuations, maintaining stable output under varying grid conditions.
• Excellent low-speed torque performance for demanding startup conditions.
• Integrated diagnostic and safety features to minimize operational downtime.
• Compact IP20 enclosure designed for space-saving panel installation.

Applications

• Heavy-duty conveyors and material handling systems requiring high starting torque.
• Industrial fans, blowers, and positive displacement pumps.
• Extruders, mixers, and centrifuges in chemical and plastics processing.
• Metalworking machinery, cranes, and hoisting equipment.

Technical Specifications

Empirical Engineering Insights

Alternative Models & Compatibility

This unit serves as a functional upgrade path for legacy FR-A720-18.5K models. While physical dimensions and mounting holes are highly compatible, terminal configurations and control logic terminal layouts should be cross-referenced. Parameter sets can be migrated efficiently using FR Configurator2 software via the USB port.

Application Pitfalls & Engineering Notes

In enclosed control cabinets, this IP20 unit dissipates considerable thermal energy under full 18.5 kW load. Ensure cabinet cooling fans are sized to handle the drive’s heat loss. To protect the inverter's input rectifier stage, an input AC reactor must be installed if the main power transformer capacity is 500 kVA or more, or if thyristor loads are on the same line.

Commissioning & Wiring Tips

Always use symmetric shielded motor cables grounded at both ends to reduce electromagnetic interference (EMI) and protect motor bearings from capacitive shaft currents. Ensure that the control circuit wiring is routed completely separate from the main circuit power lines to prevent induced signal noise.

Installation Guidelines