Product Overview

The Yaskawa CIMR-VU4A0031FAA is a V1000 variable frequency drive for 380-480 VAC three-phase motor-control applications. It provides a Normal Duty rating of 20 HP at 31 A and a Heavy Duty rating of 15 HP at 24 A. Its dual-rating capability enables application in both variable-torque systems and constant-torque machinery, provided the drive is selected using the applicable output-current and overload limits.

The 20 HP Normal Duty rating is primarily applicable to pumps, fans and other loads with moderate overload requirements. The 15 HP Heavy Duty rating is intended for equipment requiring higher starting torque or greater short-term overload capacity, including loaded conveyors, mixers and processing machinery. Motor nameplate current and actual load behavior must be reviewed before selecting the duty mode.

Main Features

• 380-480 VAC three-phase input power
• 20 HP and 31 A Normal Duty output
• 15 HP and 24 A Heavy Duty output
• Open Loop Current Vector, V/f and PM Open Loop Vector control
• Normal Duty overload capacity of 120% for 60 seconds
• Heavy Duty overload capacity of 150% for 60 seconds
• Built-in braking transistor for dynamic braking applications
• Built-in RS-422/485 MEMOBUS/Modbus communication
• Programmable digital and analog control functions
• Standard output-frequency range up to 400 Hz

Technical Specifications

Compatible System and Applications

The CIMR-VU4A0031FAA is suitable for compatible induction motors and correctly configured permanent-magnet motors. It can receive run and frequency commands from the local operator, PLC output, relay circuit, analog reference or serial network. Control-mode selection and motor tuning should reflect the required starting torque, speed range, response and motor characteristics.

Typical applications include industrial pumps, ventilation systems, conveyors, mixers, packaging equipment, process machines and material-handling systems. For machinery with shock loads, frequent starting or extended low-speed operation, review the motor thermal condition and select Heavy Duty where necessary. Forced motor ventilation may be required when a standard self-cooled motor operates continuously at low speed.

Maintenance and Replacement Notes

Before replacing CIMR-VU4A0031FAA, back up the existing parameter set and document all control and power connections. Confirm motor rated current, base frequency, rated speed, control mode, acceleration and deceleration times, electronic overload settings, carrier frequency and communication configuration. Rating-dependent parameters should be reviewed after any parameter transfer.

Check the control cabinet for adequate ventilation, heatsink clearance and clean airflow. A higher-capacity replacement drive may require different cable sizes, protective devices, panel space and heat dissipation. The IP20/NEMA 1 design should not be exposed directly to water, oil mist, conductive dust or corrosive contaminants.

When migrating to GA500, select the replacement by voltage class, output current and operating duty. Although the transition platform supports parameter conversion and closely coordinated mounting arrangements, terminal assignments, safety circuits, option cards and braking hardware must be confirmed for the actual machine.

Related Models

Related V1000 models include CIMR-VU4A0023FAA, CIMR-VU4A0038FAA and CIMR-VU4A0018FAA. CIMR-VU4A0023FAA provides a lower current rating, while CIMR-VU4A0038FAA is the next larger 480 V V1000 model.

Inquiry and Supply Notes

Please submit the full nameplate model, specification number, motor data, application type and required quantity. For replacement projects, photographs of the power terminals, control wiring and installed options can help identify the correct configuration.