Mitsubishi Electric FR-E720-5.5K FR-E700 Series Inverter

Description

Engineered to deliver high-performance motor speed control in heavy industrial configurations, the Mitsubishi Electric FR-E720-5.5K is a three-phase 200V class variable frequency drive from the esteemed FR-E700 Series. Built to handle standard and heavy-duty torque demands, this 5.5 kW (7.5 HP) inverter integrates advanced magnetic flux vector control to supply reliable low-speed torque and dynamic responsiveness. It serves as a dependable control element for machinery requiring rapid acceleration, deceleration, and high-precision velocity regulation.

Features

• High-Performance Vector Control: Advanced magnetic flux vector control algorithm delivers 150% torque at speeds as low as 1 Hz.
• Compact Enclosure Footprint: Space-saving chassis design allows side-by-side installation to minimize control panel volume.
• Removable Terminal Block: Simplifies wiring maintenance and reduces system downtime during hardware swap-outs.
• Safety-Stop Functionality: Integrated dual-channel emergency stop input complies with international safety standards (EN ISO 13849-1 Category 3 / PLd).
• USB Configuration Interface: Dedicated diagnostic port permits rapid parameter upload, download, and real-time monitoring via FR Configurator software.

Applications

• Material Handling: High-torque conveyor systems, sorting machines, and lifters.
• Process Machining: Variable speed control for mixers, agitators, and industrial centrifuges.
• Fluid Management: Constant torque control of positive displacement pumps and centrifugal pumping stations.
• HVAC Systems: Air handling unit fans, industrial blowers, and exhaust ventilation assemblies.

Technical Specifications

Connections and Interfaces

Empirical Engineering Insights

Alternative Models & Compatibility

The FR-E720-5.5K serves as a direct upgrade to legacy FR-E520-5.5K models. Keep in mind that control terminal dimensions and layout differ; the FR-E700 series utilizes a removable control connector card which is not physically compatible with FR-E500 backplanes. Parameter maps are highly consistent, though parameter settings for vector control (Pr. 80 and Pr. 81) must be manually reconfigured to match the motor's slip frequency and excitation current.

Application Pitfalls & Engineering Notes

During constant torque operation at frequencies below 10 Hz, standard non-ventilated AC motors can overheat rapidly. Under these conditions, specify a force-cooled motor or derate the load. Ensure the continuous ambient temperature in enclosed panels does not exceed 50 degC. If installing multiple drives side-by-side inside a single cabinet, the top shielding plates must be removed to guarantee proper airflow convection.

Commissioning & Wiring Tips

To transition the digital inputs from standard Sink logic (NPN) to Source logic (PNP), isolate the main power and toggle the physical logic selector switch located directly beneath the control circuit terminal block. When commissioning through terminal 4 (4-20mA current input), set parameter AU (Pr. 184) to activate Terminal 4 input. Run twisted, shielded-pair (STP) wiring for all analog reference cables and ground the shield only at the drive end (Terminal 5) to isolate signal lines from high-frequency common-mode noise.

Installation Guidelines