SK1,2M - Variable speed drive - LEROY SOMER

LEROY SOMER SK1,2M frequency drive, DIGIDRIVE SK

The SK1,2M frequency drive is part of the DIGIDRIVE SK series from LEROY SOMER. Designed for 230 V three-phase asynchronous motors, it meets the needs of maintenance teams, system integrators and machine builders seeking reliable speed control, low energy consumption and straightforward configuration. With a single-phase 200-240 V supply and motor power compatibility of 0.55 kW, this model covers many low- to medium-inertia industrial applications such as conveyors, fans and pumps. Its sensorless flux vector control ensures usable torque and speed stability appropriate for steady production rates and controlled process quality. The compact mechanical footprint simplifies panel or cabinet integration, while the digital and analog I/Os allow direct control from a PLC, local operator station or a potentiometer. Built-in protection features support continuous operation and help prevent unplanned downtime.

Technical specifications

• Manufacturer reference : SK1,2M
• Range : DIGIDRIVE SK
• Manufacturer : LEROY SOMER
• Type : AC frequency drive for asynchronous motor
• Supply voltage : 200 to 240 V single-phase, 50/60 Hz
• Compatible motor power : 0.55 kW, approx. 0.75 HP
• Nominal input current : approx. 8.1 A
• Nominal output current : 3 A
• Output voltage : 0 to 230 V three-phase
• Control mode : Sensorless flux vector control
• Protection functions : Overcurrent, overvoltage, undervoltage, overheating
• Control interfaces : Digital and analog I/Os, potentiometer, start, stop, direction
• Mounting : Cabinet or panel mounting, configuration via keypad and simplified menus
• Approx. weight : approx. 2 kg

Overview of the DIGIDRIVE SK range

The DIGIDRIVE SK series from LEROY SOMER groups compact AC drives intended for speed regulation of induction motors in production and service installations. Designed for fast commissioning, the range offers basic parameters accessible from a local keypad and a clear menu structure suited to maintenance interventions. The DIGIDRIVE SK drives cover different voltage ranges to fit varied electrical contexts, notably single-phase 100-120 V, single-phase 200-240 V, single-phase or three-phase 200-240 V and three-phase 380-480 V depending on the reference. The SK1,2M targets the single-phase 200-240 V supply to drive a 230 V three-phase motor of 0.55 kW. The integrated protection functions contribute to equipment safety and plant availability, while the input-output terminals allow direct connection to a PLC, control sensors and a setpoint potentiometer. This architecture makes it a robust and pragmatic solution for modernising existing lines or equipping new machines.

By modulating frequency and voltage, DIGIDRIVE SK drives precisely adjust speed, which helps reduce energy consumption on variable-torque applications such as ventilation and pumping. The sensorless vector control maintains usable torque without a shaft sensor, providing satisfactory speed regulation across a wide operating range. Thanks to a reduced footprint and standardised wiring, mechanical and electrical integration into existing cabinets is methodical with limited electrical engineering effort.

Industrial applications

This frequency drive integrates into many industrial environments where speed regulation improves the process and energy efficiency:

• Conveyors and light handling : speed setting, soft starts, direction reversal
• Centrifugal pumps : flow control, adaptation to load, reduction of water hammer
• Ventilation and extraction : airflow adjustment and reduced consumption at partial load
• Small special-purpose machines : dosing, packaging, assembly
• Food industry and packaging : maintaining constant speed for production quality

In these uses, the combination of single-phase input and three-phase 230 V output simplifies deployment in workshops lacking three-phase supply while retaining the benefits of a standard asynchronous drive.

Integration and communication

The integration of the SK1,2M into an automation architecture is carried out via its digital and analog I/Os, compatible with a PLC and local control. Start, stop and direction signals are wired directly, while a speed setpoint can be applied via a potentiometer or an analog input, depending on the chosen configuration. The local keypad and simplified menus speed up commissioning, parameter backup and troubleshooting. This approach ensures clear operation for maintenance teams, facilitates diagnosis in case of process drift and limits downtime. Compatibility with conventional control schemes also allows smooth connection to numerical control equipment or control loops already in place on the shop floor. For multi-axis lines, standardisation across the DIGIDRIVE SK series helps harmonise references and simplifies spare parts management.

Availability and warranty

The LEROY SOMER SK1,2M drive is offered as refurbished supply or as a standard exchange, bench-tested and delivered with warranty. Standard Exchange Industry ships within 24 to 72 hours to over 120 countries and also provides a repair service when restoration is the most appropriate solution. Our technical teams check electrical and functional compatibility with your motor and automation architecture to secure the replacement and restart. For any questions about the DIGIDRIVE SK series or to identify a compatible alternative, we assist methodically to reduce downtime and ensure continuity of operation.