OVERVIEW

Official designation: Mitsubishi FR-A520-3.7K (FREQROL FR-A500, Frequency Inverter)

Role/Application: A 200 V class AC drive for precision speed control of 3.7 kW induction motors, featuring sensorless vector control and native RS-485 communication capability.

KEY SPECS SUMMARY

Power: 3 Phase 200 to 240 V

Interfaces / Ports: RS-485 and control terminals

Indicators: Digital operator panel (FR-DU04)

Operating Temp: Minus 10 to 50 degrees Celsius

Platform / Compatibility: 3 phase induction motors only

Limit: Maximum altitude 1000 meters

Lifecycle: Discontinued, replaced by the FR-A800 series

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What is the rated output current and corresponding motor capacity for the FR-A520-3.7K?

A: The rated output current is 17.5 A, suitable for a maximum applicable motor capacity of 3.7 kW.

Wiring & Installation:

Q: What are the primary physical dimensions and approximate weight of the FR-A520-3.7K inverter unit?

A: Dimensions are 150 x 260 x 140 mm (width x height x depth), with an approximate weight of 3.5 kg.

Troubleshooting & Compatibility:

Q: What common protective functions are activated by the E.OC1 and E.FIN fault codes on the FR-A500 series drives?

A: E.OC1 indicates overcurrent shut-off during acceleration, and E.FIN indicates cooling fin overheat protection.

Replacement & Upgrades:

Q: Which Mitsubishi inverter series is the recommended official replacement path for the discontinued FR-A500 models?

A: The official replacement path for the FR-A500 series is the Mitsubishi FR-A800 series of inverters.