Bonfiglioli ACT 401-29 A AC VFD Drive 22kW

The Bonfiglioli ACT 401-29 A AC VFD Drive is a variable frequency drive intended for compatible industrial motor control applications. It is identified by the model ACT 401-29 A and is associated with a 22kW rating, a 480V AC supply reference, an output frequency range of 0 to 1kHz, and an output voltage range of 0 to 480V AC. The drive regulates the electrical supply to a motor so that speed and torque can follow the requirements of the machine process.

A drive of this class is used where motor output must be controlled across a wide speed band. The ACT 401-29 A should be integrated as part of a complete drive system that includes the motor, power cables, protection devices, control interface, cooling arrangement, and cabinet environment. Correct selection and installation are necessary for stable operation and safe maintenance.

Drive Role and Wide Range Control

The ACT 401-29 A provides adjustable output for compatible motor control. The 0 to 1kHz output frequency reference and the 0 to 480V AC output reference indicate the control range available in the drive configuration. The user should confirm that the motor, gearbox, and driven machine can operate safely across the intended speed band.

The drive receives commands from the machine control system and responds according to the configured logic. Start and stop behavior, speed references, and fault responses should be planned for the application. Safety functions must follow the machine risk assessment and site requirements.

Model Identification and Selection

The model ACT 401-29 A and the associated rating references should be checked against the project documentation. The complete identification helps confirm that the drive matches the intended application. Similar drive models can differ in rating and configuration, so verification before installation is important.

Selection should consider supply voltage, motor rating, load profile, duty cycle, ambient conditions, and cabinet space. The 22kW rating should be matched to the motor and load. If the application includes high speed operation, the motor and mechanical system should be reviewed for suitability.

Cabinet Installation

The inverter should be mounted in a cabinet that provides mechanical support and environmental protection. The mounting surface should be stable and suitable for grounding. Airflow should not be blocked by wiring or other components. Clearance around the drive should allow heat dissipation and access to terminals.

The cabinet should protect the drive from dust, moisture, and contamination that could affect cooling or insulation. Labels should identify the drive and its main connections. The layout should allow safe measurement during commissioning and maintenance.

Power Wiring and Protection

Power wiring should be performed by qualified personnel following the site electrical code. Supply, motor, and protective earth connections must be correct and secure. Cable sizes should be selected for current, voltage drop, and installation method. Motor cables should be shielded where required by the EMC plan, and the shield should be bonded effectively.

Protective devices should be coordinated with the drive and motor. The user should confirm that short circuit and overload protection are suitable for the installation. Terminal screws should be tightened and checked before power is applied.

Control Wiring and Parameters

Control wiring should follow the connection diagram. Digital and analog signals should be routed away from power cables. Parameter setup should include motor data, frequency limits, acceleration and deceleration times, and input and output functions. The upper frequency limit should be set according to the motor and machine limits.

Parameters should be changed in a controlled manner and recorded. Default settings may not fit the application. A parameter backup should be made after successful commissioning where supported. The drive should be tested at low speed and light load before normal operation.

EMC and Grounding

Frequency inverters can generate electrical noise. Good EMC practice includes separation of power and signal cables, proper shield termination, and low impedance grounding. Cabinet panels should be bonded where required. Filters and chokes should be applied if the system design calls for them.

If interference occurs, the user should inspect cable routing and grounding first. Sensors and communication lines are sensitive to noise. A physical installation correction is often more effective than a parameter change.

Commissioning

Commissioning should begin with a visual inspection and safety check. The motor should be tested at low speed and light load. The user should observe current, speed stability, and noise. Direction of rotation should be confirmed. Protective functions should be tested before normal operation.

Commissioning records should include the drive model, motor data, frequency settings, parameter changes, and test results. These records help future maintenance and replacement planning.

Diagnostics and Troubleshooting

Diagnostics should consider supply quality, motor condition, load, wiring, and parameters. Repeated fault resets without investigation can hide a developing problem. The event history can help identify the sequence of events.

If the drive does not start, the user should check control commands, supply, and safety chain. If the motor runs roughly at higher frequency, the user should review motor data, mechanical balance, and parameter limits.

Maintenance and Service

Routine maintenance should include checking cooling fans, filters, terminals, and cabinet ventilation. Dust accumulation should be removed according to site policy. The drive should be isolated and allowed to discharge before work.

If the drive must be replaced, the replacement unit should be configured correctly and tested with the motor. Parameter backups and commissioning notes reduce replacement time.

Application Value

The ACT 401-29 A supports adjustable speed control across a wide frequency range in compatible industrial machinery. It can help match motor output to process demand and reduce mechanical stress during starting and stopping.

Summary

The Bonfiglioli ACT 401-29 A AC VFD Drive is intended for compatible industrial motor control. Correct selection, cabinet installation, power and control wiring, EMC practice, parameter configuration, and maintenance are essential.