SK1,5M - Variable speed drive - LEROY SOMER

Variable frequency drive Leroy Somer SK1,5M - DIGIDRIVE SK

The reference inverter SK1,5M belongs to the DIGIDRIVE SK range, also known as Commander SK, from the manufacturer Leroy Somer. Designed to drive three-phase asynchronous motors, it targets industrial environments that require reliable speed and torque control in a compact footprint. Powered by 200 to 240 V single-phase, this model covers a motor rating of 0.75 kW, roughly 1 HP, and delivers a nominal output current of 4 A. Its sensorless vector control provides stable response across a wide speed range while optimizing energy consumption. This drive integrates efficiently into new or existing automation architectures, for replacement or retrofit, for applications such as pumps, ventilation, conveyors and handling processes. Users benefit from straightforward commissioning, predictable operation and energy savings thanks to fine speed adaptation to load. The SK1,5M reference corresponds to the manufacturer equivalent Control Techniques SKA1200075, easing identification and substitution during maintenance.

Technical specifications

• Manufacturer reference: SK1,5M
• Equivalent reference: Control Techniques SKA1200075
• Range: DIGIDRIVE SK, also called Commander SK
• Manufacturer: Leroy Somer
• Type: AC frequency drive with sensorless vector control for three-phase asynchronous motors
• Supply voltage: 200 to 240 V single-phase (M sub-series)
• Rated input current: 10.5 A
• Rated motor power: 0.75 kW, approximately 1 HP
• Rated output current: 4 A
• Output voltage: three-phase, variable depending on speed setpoint and load
• Category: Variable speed drives

DIGIDRIVE SK range overview

The DIGIDRIVE SK series was developed to offer fast deployment and a compact footprint while providing effective control of asynchronous motors for general drive applications. It features a streamlined architecture, motor protection functions and basic parameters accessible to speed up commissioning. For replacements, the range's compatibility with many standard control inputs and analogue signals simplifies keeping existing installations operational. DIGIDRIVE SK drives help reduce operating costs by precisely tuning speed to load, lowering energy consumption on typical pump and fan duty cycles.

• Supply sub-series: ML 100 to 120 V single-phase, M 200 to 240 V single-phase, M or TL 200 to 240 V single or three-phase, T 380 to 480 V three-phase
• Positioning: general-purpose frequency drive for standard industrial applications, with open-loop vector control

The SK1,5M model belongs to the M sub-series, intended for 200 to 240 V single-phase supplies. It is a relevant choice when the site's electrical infrastructure cannot directly feed a three-phase drive while retaining the required performance for a 0.75 kW three-phase asynchronous motor. The sensorless vector control strategy provides stable response at low speeds and supports process repeatability. Standard VFD features such as acceleration/deceleration ramp management, current limiting and motor thermal protections contribute to the reliability and availability expected in production.

Industrial applications

The SK1,5M fits into many environments where speed control improves energy performance, process quality and reduces mechanical stress. It is suitable for new installations and upgrades, paired with a programmable logic controller or a numerical control system, and communicates easily via the range's standard control signals. Maintenance teams appreciate its compactness for panel integration and fast basic configuration during urgent replacements.

• Centrifugal and positive displacement pumps: speed adjustment to control flow and reduce consumption
• Ventilation and HVAC: fan control with quadratic law to optimise energy use
• Conveyors and light handling: smooth starts, maintaining constant speed under varying load
• Continuous processes: dosing, mixing, agitation where speed regulation improves quality
• Packaging machines and assembly lines: adapting to cycle rate and reducing mechanical shocks

Integration and communication

Integration of the DIGIDRIVE SK SK1,5M into an automation architecture is standardised, in association with programmable logic controllers or numerical control systems. The range's usual control signals cover speed selection, analogue setpoint, start/stop command and ramp management. This approach eases replacement of an existing drive and minimizes panel adaptations.

Basic parameterisation covers the settings needed for quick commissioning, including assignment of control inputs, ramp definition and motor thermal protection. Optional cards and interfaces, available depending on the DIGIDRIVE SK configuration, extend connectivity when communication with a programmable logic controller or a supervision system is required. For applications demanding high servo performance, a dedicated servo drive is recommended, whereas the SK1,5M efficiently meets the requirements of general asynchronous drive tasks.

Availability and warranty

The Leroy Somer SK1,5M frequency drive is offered by Standard Exchange Industry as refurbished supply or exchange, and can also be serviced for repair. Each refurbished unit is bench-tested. Shipping is provided within 24 to 72 hours to over 120 countries, with warranty according to the selected service. In case of production line stoppage or identified obsolescence, our technical team assists to confirm the Control Techniques SKA1200075 equivalence, validate the 0.75 kW rating and verify that the 200 to 240 V single-phase supply suits your installation. Contact us to select the best solution for your maintenance needs, whether a rapid replacement, a spare supply or a qualified repair.