SK2402 - Variable speed drive - CONTROL TECHNIQUES

Control Techniques SK2402 frequency inverter - COMMANDER SK

The SK2402 frequency inverter belongs to the Commander SK range (also referred to in some documentation as Digidrive/Commander SK) from Control Techniques. Designed to control AC induction motors in general industrial applications, it delivers reliable speed and torque control with quick commissioning. The SK2402 is aimed at maintenance teams and integrators looking for a compact drive that provides the essential features consistently and can operate in V/F mode or sensorless vector mode to improve low-speed torque without adding an encoder. Built-in protection and thermal management functions, together with a temperature-controlled fan, contribute to installation availability and to the longevity of the power electronics. The wiring architecture is straightforward, with power, motor and control I/O terminal blocks to simplify panel integration and maintenance.

Technical characteristics

• Manufacturer reference : SK2402
• Range : Commander SK
• Manufacturer : Control Techniques
• Type : Compact frequency drive for AC induction motors
• Supply voltage : according to range configuration, single-phase or three-phase 50/60 Hz, to be confirmed for your version
• Rated power : depends on SK2402 sizing, refer to the selection guide and the motor nameplate
• Rated output current : variable depending on the exact model, consult factory documentation
• Output voltage : PWM inverter, from 0 up to the input voltage, depending on settings and load
• Control mode : V/F (volts/hertz) and sensorless vector for enhanced low-speed torque
• Switching frequency : configurable within the range indicated in the manual, depending on thermal constraints
• Degree of protection : intended for cabinet mounting, IP level depends on version and environment

Overview of the COMMANDER SK range

The Commander SK series targets common variable-speed drive applications in industry where reliability, simple configuration and control stability are priorities. It covers the fundamentals required for driving AC induction motors, with typical integrated functions such as programmable acceleration and deceleration ramps, current limiting, thermal protection, braking management and the ability to set minimum and maximum speeds. Cooling is provided by a temperature-controlled fan, reducing noise at light load and extending component life. Terminal access is direct, which simplifies wiring and maintenance. A commissioning Quick Guide accompanies the technician for basic parameter setup, including motor nameplate data, ramp times and speed references.

• V/F and sensorless vector control : suitable for standard speed variation needs with improved low-speed torque without a position sensor.
• Scalability via range options : possible extensions depending on version for I/O or communication to integrate into heterogeneous automation architectures.

The SK2402 fits this concept of a robust, engineering-efficient drive, capable of maintaining stable operation on general machinery while remaining easy to diagnose during preventive and corrective maintenance.

Industrial applications

The Commander SK SK2402 covers a wide range of applications where speed variation brings performance gains, energy efficiency and improved mechanical behavior of the process. It is commonly used to control three-phase motors on the following equipment.

• Conveying and light handling : precise speed adjustment of belts and rollers with soft starts to reduce shocks.
• Process and utility pumping : flow adaptation and reduction of water hammer thanks to configurable ramps.
• Industrial ventilation and HVAC : fan speed adjustment to optimise consumption and noise level.
• Simple production machines : auxiliary drives, winding and unwinding where speed stability is required.
• Food and packaging : coordination of asynchronous movements requiring reliable speed variation.

Integration and communication

The SK2402 integrates typically into a control cabinet via a power terminal, a motor terminal and digital and analog I/O for local or remote commands. It interfaces easily with a programmable logic controller for speed reference, start/stop commands, setpoint selections and status feedback. In architectures combining digital control and a frequency drive, it serves as the main or auxiliary variable-speed drive without requiring a speed feedback sensor when very fine torque control is not necessary.

Configuration is possible via the built-in keypad and the commissioning documentation. Basic settings include entering motor nameplate data, min/max setpoints, acceleration and deceleration times, current limiting and, where applicable, braking and restart functions. The temperature-controlled fan reduces wear during partial operation. The typical protection functions of the range cover overcurrent, overvoltage, undervoltage, overtemperature and motor faults, with clear diagnostics to speed up restart. Parameter tuning allows adapting the drive's dynamic behaviour to the mechanical constraints of the driven machine to protect mechanical components and improve process repeatability.

Availability and warranty

The Control Techniques SK2402 frequency inverter is offered by Standard Exchange Industry as reconditioned supply tested on a bench, as a standard exchange to reduce downtime, or as a repair when refurbishment is appropriate. Each solution is provided with a warranty according to the selected service. Our teams ship within 24 to 72 hours to many countries and provide technical support to validate compatibility with your asynchronous motor and your automation architecture. In case of obsolescence or failure, we assist you in identifying the correct Commander SK reference and in preparing commissioning to secure the line restart while respecting your process constraints.