Mitsubishi Electric FR-A820-22K-1 FR-A800 Inverter

Description

Managing heavy-duty motor control within demanding industrial environments is the primary role of the Mitsubishi Electric FR-A820-22K-1 variable frequency drive. Operating on a 200V class three-phase input, this premium FR-A800 Series inverter delivers an ND (Normal Duty) rated capacity of 22 kW, making it suitable for high-torque applications. Equipped with an FM-type monitor terminal and integrated RS-485 serial communication, the unit enables real-time drive diagnostics and integration into centralized control networks. Its robust mechanical housing is built to withstand rigorous factory conditions while optimizing thermal dissipation.

Features

• Advanced Vector Control: Supports Real Sensorless Vector Control (RSV) and full closed-loop vector control for induction and permanent magnet (PM) motors.
• Dual Network Capability: Built-in RS-485 communication protocols with easy expansion paths to CC-Link, Profibus-DP, DeviceNet, and EtherCAT.
• Excellent Torque Performance: Delivers high starting torque (200% at 0.5 Hz under Real Sensorless Vector Control).
• Integrated PLC Functionality: Allows custom logic programming directly within the drive to reduce external controller requirements.
• Long-Life Design: Built with high-specification capacitors and cooling fans rated for a 10-year design life.

Applications

• Heavy-duty material handling systems and industrial cranes.
• High-capacity fans, blowers, and industrial ventilation systems.
• Positive displacement pumps and wastewater processing equipment.
• Extruders, mixers, and processing machinery in chemical and plastics plants.

Technical Specifications

Connections and Interfaces

Empirical Engineering Insights

Alternative Models & Compatibility

When migrating legacy systems from the older FR-A720-22K series to the FR-A820-22K-1, ensure you map the terminal configurations accurately. While the mounting dimensions are highly compatible, parameter structures differ. Use FR Configurator2 software to perform a automated parameter conversion. Pay careful attention to the FM terminal output settings; the standard FM pulse frequency scaling may require adjustments to match your existing analog panel meters.

Application Pitfalls & Engineering Notes

Under continuous high-load applications, this 15 kg inverter generates considerable thermal dissipation. Enclosure design must accommodate at least 150W of continuous heat output from the drive’s internal heat sink. Maintain a minimum clearance of 10 cm above and below the drive. For enclosed panel installations, we recommend routing the heatsink portion through the back of the panel (external mounting) to preserve the interior thermal budget of the control cabinet.

Commissioning & Wiring Tips

To eliminate electromagnetic interference (EMI) on the RS-485 communication bus, always utilize shielded twisted-pair (STP) cabling. Connect the shield braid strictly to the physical ground terminal at the drive end only. Avoid routing control circuit wiring in the same conduit or parallel cable tray as the main R/L1-S/L2-T/L3 input lines. Always maintain a minimum separation distance of 30 cm between high-power supply cables and low-voltage control signals.

Installation Guidelines