SKC3400300 - Variable speed drive - CONTROL TECHNIQUES

Control Techniques frequency drive SKC3400300, Digidrive SK / Commander SK range

The frequency drive SKC3400300 belongs to the Digidrive SK / Commander SK series from Control Techniques. Designed for precise speed control of asynchronous motors, it addresses the needs of industrial operators facing continuity of service, energy optimization and modernization of existing installations. This model, sized for a nominal power of 3 kW, is suitable for common drive architectures in production lines, transfer systems and utilities. Its operation by frequency variation provides fine tuning of the operating point, measurable reduction of inrush currents at start-up and improved handling of acceleration and deceleration cycles. The parameter-based approach of the Digidrive SK range simplifies commissioning and maintenance while ensuring functional compatibility with common automation interfaces in B2B industrial environments.

Technical characteristics

• Manufacturer reference : SKC3400300
• Range : Digidrive SK / Commander SK
• Manufacturer : Control Techniques
• Type : Variable speed drive for three-phase asynchronous motor
• Supply voltage : three-phase supply up to 480 V
• Rated power : 3 kW, approximately 4 HP
• Output voltage : variable three-phase from 0 V up to supply voltage, adjustable frequency
• Control mode : speed control by frequency variation tailored to asynchronous motors, with management of acceleration and deceleration ramps
• Protection functions : motor thermal monitoring, under-voltage and over-voltage, overload faults configurable
• Local interfaces : logical and analog I/O terminal block depending on version, local operator panel for control and parameter setup
• Rated output current : depends on configuration and load conditions, refer to motor sizing

Overview of the Digidrive SK / Commander SK range

The Digidrive SK / Commander SK family groups general-purpose frequency drives known for straightforward implementation and stable continuous operation. Their architecture meets the recurring needs of production workshops, utilities and conveying processes, with a configuration logic focused on a few essential parameters, including motor identification, speed setpoints and ramp managers. The design favors robust, repeatable use, with a functional core centered on speed control of asynchronous motors and pragmatic integration into environments controlled by a programmable logic controller or by local controls. For maintenance and obsolescence management, this range is a frequent replacement standard, enabling protection of heterogeneous installations without redesigning the automation architecture. The objective is to offer reliable control, improved energy efficiency through fine frequency adjustment and simplified maintenance via a clear parameterization logic.

Industrial applications

The SKC3400300 targets variable-speed applications where control of the acceleration profile, reduction of mechanical stress and pursuit of optimal electrical efficiency are priorities. Typical use cases include :

• Conveying and material handling : control of belts, rollers and transfers with speed adaptation according to flow.
• Centrifugal pumps : flow adjustment by frequency regulation to limit energy losses and water hammer through controlled ramps.
• Ventilation and air handling : control of fans and extractors, reducing noise and consumption at partial load.
• Assembly and packaging machines : basic synchronization of drive sections and adaptation of cycle rates.
• General processes : mixing, dosing, feeding auxiliary components, with possible coexistence alongside servo drives and numerical control equipment.

Integration and communication

Integration of the drive into an architecture controlled by a programmable logic controller is typically done via local I/O and the operator interface. Communication extensions may be available depending on configuration for exchange with fieldbuses, which facilitates supervision and status reporting. Commissioning is based on entering the motor nameplate data, choosing frequency limits, and adjusting acceleration and deceleration ramps to avoid mechanical shocks. Programming the logical inputs allows definition of start/stop, direction reversal and speed presets, while analog inputs, when present, serve for continuous setpoints. In operation, monitoring of the built-in protections contributes to system reliability in case of overload, thermal fault or supply anomaly. Optimizing start and stop sequences also reduces wear of mechanical components and improves overall equipment availability.

From an energy standpoint, adjusting the frequency to the actual load reduces consumption in variable applications, notably in pumping and ventilation. Running at adapted frequency limits unnecessary losses and aligns with energy efficiency goals. In lines combining drives, servo drives and numerical control equipment, the SKC3400300 efficiently fulfils the variable-speed drive functions for auxiliary components while remaining straightforward to maintain for service teams.

Availability and warranty

Standard Exchange Industry offers the reference SKC3400300 subject to stock, as an exchange unit or by repair of your equipment. Each unit supplied is bench-tested according to internal procedures, with an associated warranty whose duration varies depending on the chosen service. Shipping is provided within 24 to 72 hours to many countries to limit production line downtime. Our technical support assists you in identifying the version suited to the motor and electrical environment, in preparation for commissioning and in replacing obsolete equipment from the Digidrive SK / Commander SK range. If specific constraints exist, we assess functional compatibility with your automation architecture and propose a continuity solution aimed at securing restart without heavy reprogramming.

For any request related to the Control Techniques SKC3400300, whether a reconditioned supply, an exchange unit or a repair, our teams strive to provide a documented and rapid response. This approach, based on verified technical procedures, facilitates the purchasing decision and reintegration of the drive into your installation while respecting the safety, availability and performance constraints expected in industry.