SK2T - Variable speed drive - LEROY SOMER

Leroy Somer SK2T Variable Frequency Drive - DIGIDRIVE SK

The variable frequency drive SK2T belongs to the DIGIDRIVE SK series from Leroy Somer, intended for precise control of three-phase asynchronous motors in industrial environments. Designed for speed variation and process energy optimisation, it provides sensorless vector control suited to general applications such as conveyors, pumps and ventilation systems. This 1.1 kW model meets the needs of maintenance teams and integrators seeking a reliable solution to stabilise speed, control torque during transients and extend motor life. With clear configuration functions, the SK2T allows adjusting output frequency and acceleration/deceleration ramps, protects the drive against overcurrent and overload, and reduces consumption under partial load. The objective is operational and measurable: stabilise production, improve flow control and limit mechanical wear, while integrating the drive into an automation architecture with a programmable controller or numerical control.

Technical characteristics

• Manufacturer reference : SK2T (1.1 kW model, associated reference in the DIGIDRIVE SK range SKB3400110)
• Range : DIGIDRIVE SK
• Manufacturer : Leroy Somer
• Type : AC variable speed drive for three-phase asynchronous motors
• Rated power : 1.1 kW (approx. 1.5 HP, indicative value)
• Output voltage : 0 to 480 V three-phase
• Rated output current : 2.8 A
• Control mode : Sensorless vector control, frequency regulation for speed variation
• Supply voltage : suitable for industrial networks 230 V and 400 V depending on range configuration
• Motor protection : integrated electronic functions against overload and overcurrent
• Configuration : frequency settings, ramps and adaptation to motor characteristics for efficient commissioning
• Intended application : speed variation in general industrial environments, energy optimisation and process stability

Overview of the DIGIDRIVE SK range

The DIGIDRIVE SK series groups AC frequency drives designed to control speed and torque on induction motors. Deployed across a wide range of industries, this range targets applications where ease of commissioning, robustness of control and operational continuity are priorities. It offers structured configuration functions, adjustable acceleration and deceleration profiles, and fine management of voltage and frequency to limit losses and improve efficiency at partial load. The architecture of the range favours integration into automation, whether to control conveyor speed, maintain pressure in a pumping loop or regulate airflow. Emphasis is placed on stability, motor protection and consistency of settings to maintain constant process quality, reduce unexpected stoppages and facilitate preventive maintenance.

• Energy efficiency oriented configurations : suitable for pumps, fans and HVAC circuits, with precise speed control to limit consumption and mechanical stress.
• Continuous process oriented configurations : suited to conveyors, mixers and transfers, with speed stabilisation and controlled transient response without encoder feedback.

The SK2T model sits at the 1.1 kW power level, covering the majority of light handling and auxiliary pumping applications. The user benefits from a clear configuration framework to correlate voltage, frequency and ramp times to the characteristics of their asynchronous motor, with sensorless vector control providing better low-speed performance compared with a basic V/f law.

Industrial applications

This frequency drive integrates into many environments where speed accuracy and availability are priorities.

• Conveying and sorting : speed control for assembly lines, transfers, accumulators and distribution systems.
• Pumping and fluid handling : maintaining a stable operating point, reducing water hammer through adapted ramps.
• Industrial ventilation and HVAC : adjusting airflow for energy savings and reduced mechanical noise.
• Packaging : synchronisation of motorised sections with robust open-loop control.
• Food industry and light process : control of auxiliary drives with low-speed stability and controlled restart.

Integration and communication

The SK2T integrates into automation architectures driven by a programmable logic controller or numerical control. The DIGIDRIVE SK range provides I/O functions for local control and speed regulation, as well as expansion possibilities via modules according to site requirements. Integration into the control system is thus simplified, whether the speed command comes from a potentiometer, an analog setpoint from a controller or a digital instruction from an automation system. This approach favours sequence consistency and repeatability of production cycles.

Commissioning is carried out by methodical configuration of motor data and ramps, then by validating the electronic protections against overcurrent and overload. As part of a modernisation, the drive can replace an existing unit of the same power range, with revised wiring and configuration to meet site standards. The objective is to obtain a stable frequency variation, satisfactory torque behaviour without sensor feedback and an overall efficiency superior to on/off solutions. Unlike a servo drive dedicated to synchronised moves, the DIGIDRIVE SK prioritises simplicity, robustness and speed stability in open loop.

Availability and warranty

Standard Exchange Industry offers the Leroy Somer SK2T DIGIDRIVE SK as new or reconditioned equipment, and also as standard exchange or for repair depending on the condition of your unit. Each reconditioned unit is tested on a test bench, with functional checks of the main protections and frequency variation. Shipping is provided within 24 to 72 hours to over 120 countries. Our services include a warranty of 6 to 24 months depending on the service. In case of a line stoppage, our technical team supports you to verify compatibility with your three-phase asynchronous motor, specify the appropriate supply configuration for the site and define the initial settings. To secure your restart and sustainably stabilise your process, choose the SK2T as the reference frequency drive for your conveying, pumping and ventilation applications.