Mitsubishi Electric FR-A840-01800-2-60 FR-A800 Series Inverter

Description

Engineered to deliver precise speed and torque control in demanding heavy-duty environments, the Mitsubishi Electric FR-A840-01800-2-60 is a high-performance variable frequency drive belonging to the flagship FR-A800 series. Featuring a 400V class design, this standard model supports multi-rating operations, peaking at a Super Light Duty (SLD) rated inverter current of 180A. The integration of 3C2 circuit board conformal coating guarantees high operational reliability by protecting sensitive electronics from corrosive gases and moisture, making this robust 48 Kg unit ideal for critical infrastructure and manufacturing environments.

Features

• Multi-Rating Architecture: Optimizes power matching by offering four distinct duty ratings (SLD, LD, ND, HD) to fit specific industrial load requirements.
• Conformal Circuit Board Coating: Complies with IEC 60721-3-3 Class 3C2 specifications, shielding inner electronics from industrial pollutants.
• Real Sensorless Vector Control (RSV): Offers dynamic speed and torque control without requiring external encoder feedback.
• Comprehensive Safety Functions: Built-in dual-channel emergency stop circuit complying with EN ISO 13849-1 Category 3/PLd and IEC 60204-1.
• Advanced Energy Saving: Employs optimum excitation control to minimize motor power consumption under variable loads.

Applications

• High-capacity water pump facilities and ventilation fans.
• Heavy material handling, cranes, and gantry hoist units.
• Extrusion lines, mixers, and industrial centrifuges.
• Complex conveyor systems requiring precise speed synchronization.

Technical Specifications

Empirical Engineering Insights

Alternative Models & Compatibility

When upgrading older FR-A740 legacy series installations to the FR-A840-01800-2-60, ensure the physical depth clearance is double-checked as the A800 series chassis footprint varies slightly due to updated cooling duct paths. The "-2-60" configuration denotes specific control terminal variants standard in CA markets. Use the Mitsubishi FR Configurator2 software to automatically map parameter registers from the old unit, reducing physical tuning down-time.

Application Pitfalls & Engineering Notes

Operating the VFD under the 180A SLD (Super Light Duty) profile is ideal for low-starting-torque installations like centrifugal fans. However, this configuration limits the overload limit to 110% for 60 seconds. Attempting to run high-inertia loads (like positive displacement pumps or crushers) on the SLD rating can trigger intermittent overcurrent trips (E.OC1 or E.OC2). For high-torque applications, the drive must be programmed and wired under the Normal Duty (115A / 150% overload) or Heavy Duty (96A / 200% overload) profiles.

Commissioning & Wiring Tips

Because this VFD lacks standard internal plated conductors, ensure all high-power terminal connections are torqued precisely to the OEM specifications in the manual to prevent oxidation or terminal overheating. Use symmetrical shielded motor cables (3-phase + ground) and establish a solid 360-degree ground contact on the metal cable gland plate to minimize high-frequency electromagnetic noise emitting to nearby analog instrumentation lines.

Installation Guidelines

1. 1 Install the heavy 48 kg drive vertically on a flat, non-combustible steel panel. Maintain a minimum cooling clearance of 100 mm above and below the unit, and 50 mm horizontally from adjacent hardware to ensure uninhibited airflow.
2. 2 Connect the incoming three-phase AC power lines to R/L1, S/L2, and T/L3. Ensure phase rotation matches local site code standards.
3. 3 Route shielded motor wiring directly to output terminals U, V, and W. Do not connect AC mains power to these output terminals, as doing so will permanently destroy the IGBT modules.
4. 4 Establish a solid low-impedance ground by landing the system ground conductor directly on the VFD PE grounding terminal.
5. 5 Turn on power and configure fundamental parameters (Pr. 1 to Pr. 9) matching the motor nameplate. Execute an offline motor auto-tuning run to optimize vector control algorithms.