SK2401 - Variable speed drive - CONTROL TECHNIQUES

Control Techniques SK2401 variable frequency drive, Commander SK

The SK2401 variable frequency drive belongs to the Commander SK series from Control Techniques. Designed to control three-phase asynchronous motors, it meets the demands of industrial environments where speed stability, equipment availability and energy management are priorities. Powered by 380-480 V three-phase, this model covers a motor power of 7.5 kW with a nominal current of 15.3 A. The control electronics integrate two microprocessors including a dedicated DSP for PWM synthesis with adjustable carrier frequency, enabling precise speed control and torque quality suited to a wide range of applications. For maintenance teams, the SK2401 is a relevant replacement for retrofits or rapid recommissioning after an incident, while offering straightforward integration with existing automation whether driven by a programmable logic controller, numerical control or SCADA supervision.

Technical specifications

• Manufacturer reference : SK2401
• Range : Commander SK
• Manufacturer : Control Techniques
• Type : AC variable speed drive for three-phase asynchronous motors
• Supply voltage : 380-480 V three-phase
• Rated power : 7.5 kW, approx. 10 HP
• Rated output current : 15.3 A
• Output voltage : three-phase for AC induction motor
• Control mode : open-loop speed regulation driven by DSP, PWM synthesis with adjustable carrier frequency
• Input ranges available across the series : 200-240 V single-phase, 200-240 V three-phase, 380-480 V three-phase depending on model
• Control architecture : dual-microprocessor electronics for robust torque/speed response

Overview of the Commander SK range

The Commander SK series groups general-purpose AC variable frequency drives intended for industrial machines and utilities. It is focused on fast commissioning, reliable operation and easy integration into heterogeneous automation architectures. Devices in the range are characterized by sizing appropriate for asynchronous motors, DSP-based numeric control, and the ability to adjust the carrier frequency to optimise speed performance and torque quality according to the mechanical context.

• Variable-torque applications : pumping, ventilation and air handling with speed adjustment to improve process energy efficiency
• Constant-torque applications : conveying, material handling and process mechanisms requiring stable speed retention and consistent torque response

The SK2401 sits at the heart of this range for 380-480 V three-phase networks, providing the power required for 7.5 kW motors while maintaining reproducible speed control. This configuration simplifies replacements in installed bases, reduces downtime and supports energy optimisation through frequency variation.

Industrial applications

The SK2401 covers a wide scope of uses in process industry and serial manufacturing. It is primarily aimed at lines where reliable speed adjustment and integration with a programmable controller are required without excessive software complexity. Typical scenarios include open-loop motor speed variation, adapting flow or pressure by controlling pumps, and regulating air flow in industrial ventilation.

• Conveyors : stable speed retention for transfers, sorting and accumulation in intralogistics and material handling
• Centrifugal pumps : speed control to adjust flow and pressure, reducing mechanical stress at startup
• Ventilation and extraction : air flow variation, adapting to load and process setpoints
• Compressors : speed management to smooth demand and balance operation across the network
• Process machines : mixing, dosing, packaging with reproducible speed control

Integration and communication

The SK2401 integrates into new or existing automation architectures. It can be interfaced with a programmable logic controller or a numerical controller via digital and analogue inputs, and depending on versions and available modules in the Commander SK range it can receive industrial communication interfaces for fieldbus or serial links. This approach enables integration with SCADA systems and multi-vendor architectures without overhauling the control system.

Parameterisation is performed via the local keypad when fitted, as well as with the manufacturer's software tools, allowing adjustment of the PWM carrier frequency, acceleration and deceleration ramps, speed limits and motor protections. This configuration supports predictable commissioning and repeatable operation over time.

Availability and warranty

The Control Techniques SK2401 is offered by Standard Exchange Industry as new or refurbished supply depending on availability, as a standard exchange unit to minimise downtime, or as a repair when continuity of operation and budget control are priorities. Each refurbished unit is bench-tested before shipment and comes with a warranty to secure your recommissioning, with typical shipping times of 24 to 72 h to more than 120 countries. Our technical teams assist you in identifying the exact reference, defining essential parameters and verifying electrical and mechanical compatibility to ensure an effective replacement of the installed drive. For heterogeneous fleets, harmonisation via the Commander SK range simplifies both maintenance and spare parts stocking.