SK4202 - Variable speed drive - CONTROL TECHNIQUES

CONTROL TECHNIQUES SK4202 Frequency Inverter - COMMANDER SK

The frequency inverter SK4202 belongs to the COMMANDER SK range from CONTROL TECHNIQUES. Designed for industrial environments where service continuity and process repeatability are paramount, it provides reliable speed and torque control for asynchronous motors. This series is widely deployed in general drive applications, from conveyors to plant utilities, offering a balanced compromise between straightforward commissioning, essential features and ruggedness. For retrofit contexts, preventive replacement or urgent troubleshooting, the SK4202 is an operational solution to stabilise processes, reduce mechanical shocks and optimise energy consumption. Its structured parameter logic simplifies configuration recovery, duplication of assemblies and parameter transfer during recommissioning. Motor protection functions and internal monitoring contribute to overall plant availability. The mechanical form factor and modular option set ease cabinet integration as well as interfacing with existing PLCs and CNC systems.

Technical specifications

• Manufacturer reference : SK4202
• Range : COMMANDER SK
• Manufacturer : CONTROL TECHNIQUES
• Type : Variable frequency drive for asynchronous motors, general-purpose applications
• Supply voltage : depending on version, single-phase or three-phase configurations available in the series
• Power handling : depends on the chassis associated with the SK code, to be selected according to motor power
• Rated output current : determined by power and thermal sizing of the chosen version
• Output voltage : three-phase, proportional to supply, controlled by PWM
• Control mode : common series modes, including V/Hz and sensorless vector control, depending on variants and parameters
• Switching frequency : adjustable via parameters, to be set according to motor and EMC constraints
• Ingress protection : typically IP20 for cabinet installation, other protections depending on environment and accessories

Overview of the COMMANDER SK range

The COMMANDER SK series meets common drive needs across many industries. It focuses on straightforward start-up, a clear operator interface and essential speed regulation functions. Drives in this range are frequently used to modernise existing installations, replacing older inverters or as part of extensions where reference standardisation simplifies maintenance. Available options on the range, notably for I/O, EMC filtering and adaptation modules, allow compliance with heterogeneous specifications without overcomplicating the supply chain.

• General drive applications : control of asynchronous motors for continuous and cyclical processes, with configurable acceleration and deceleration profiles, torque limiting and built-in protections.
• Modular extensions : cards and accessories available as required to adapt I/O, filtering and interfacing with automation architectures.

The SK4202 model fits this standardisation approach. It is suitable where speed stability, ramp repeatability and drive state supervision are priorities for production quality, offering a readable interface for maintenance teams and easy replacement in troubleshooting situations.

Industrial applications

This frequency inverter integrates into varied environments where asynchronous motor control must remain precise and stable. Its operational range covers most conveyor, utility and assembly machine needs, with attention to protecting mechanical components and managing energy. It is suitable for architectures combining PLCs, field sensors and actuators, and can be deployed in new cells as well as in modernization of existing lines.

• Conveyors and material handling : speed control, soft starts, synchronization via analog or logic setpoints.
• Pumps and ventilation : frequency adjustment to regulate flow, reducing hydraulic shocks and consumption at partial load.
• Packaging : speed stability for unwinders, rewinders and auxiliary drives.
• Textile and paper : control of section speeds and limitation of mechanical jolts.
• Assembly and special machines : drive control for non-synchronised axes with ramp profiles adjusted to the process.

Integration and communication

The SK4202 integrates into existing automation architectures via its inputs and outputs, both digital and analog, and through the addition of extension modules when required. Communication with the PLC can be implemented using discrete wiring, analog setpoints or fieldbus modules depending on engineering choices. This approach enables insertion of the drive into multi-vendor systems without altering the overall architecture. EMC compatibility and the availability of suitable filtering solutions for industrial environments contribute to system reliability.

Commissioning is structured around explicit parameters. Standard functions include motor configuration, ramp settings, torque limits, brake management and thermal monitoring. Status and alarm code diagnostics simplify fault analysis and predictive maintenance. Parameter backup and duplication enable rapid drive replacement in case of unexpected stoppage, with clear traceability of versions applied on site.

Availability and warranty

The CONTROL TECHNIQUES SK4202 frequency inverter is offered by Standard Exchange Industry as refurbished supply, standard exchange or repair service, each solution tested on a bench before shipment and covered by a warranty. Shipping is provided within 24 to 72 hours to over 120 countries. For a line outage, our technical team supports you in identifying the exact reference, analysing compatibility with the motor and installation, and preparing a controlled replacement. SEI handles return logistics of defective equipment when the standard exchange option is selected, speeding up production resumption and securing the supply chain. A test report is provided on request, describing the functional verification procedure applied to the drive and the critical checkpoints inspected before release.