SK0,5ML - Variable speed drive - LEROY SOMER

Frequency inverter SK0,5ML, SK series

The reference SK0,5ML belongs to a widely deployed series in industry for controlling asynchronous motors. This frequency inverter is aimed at maintenance teams, integrators and operators looking for a reliable solution for speed regulation, recommissioning existing installations and reducing mechanical wear on drives. The SK series is known for its ease of cabinet integration, compatibility with common automation practices and its ability to stabilise processes through precise output frequency modulation. In a retrofit or preventive replacement context, the SK0,5ML helps contain downtime by offering a methodical configuration and motor protection functions designed to secure operation. When detailed specifications are not available, verifying the electrical data on the product nameplate or via your technical file ensures matching with the motor power, supply voltages and the control scheme expected by the site’s programmable controller.

Technical features

• Référence constructeur : SK0,5ML
• Gamme : SK series, identification to be confirmed on the inverter label
• Constructeur : Leroy-Somer, according to product marking
• Type : Frequency inverter for AC asynchronous motors
• Tension d’alimentation : to be confirmed on the nameplate, single-phase or three-phase versions depending on configuration
• Puissance nominale : to be checked in kW and in CV, matched to the target motor and sub-reference
• Courant de sortie nominal : depends on the hardware configuration, to be validated on the label
• Tension de sortie : variable three-phase output for driving asynchronous motors
• Mode de commande : standard V/f control, other modes available depending on series version
• Fréquence de découpage : configurable by model, to be set according to the motor and the desired acoustic level
• Indice de protection : depending on version and panel integration environment

Overview of the SK series

The SK series is designed for speed regulation of asynchronous motors within industrial automation architectures. It fits into existing installations where supply stability, parts availability and maintainability are priorities. Drives in this family are characterised by a structured commissioning process, clear parameter sets and built-in functions for motor thermal protection and overload monitoring. This approach promotes reproducibility of settings during emergency replacement and limits behavioural differences between old and new units.

• General-purpose configurations : intended for conveyors, pumps and fans, providing stable speed regulation and optimised energy efficiency through V/f control adapted to the process.
• Machine-oriented configurations : dedicated to auxiliary axis drives, unwinders and rewinders, with control and ramp options suited to the required dynamics.

The SK0,5ML model therefore integrates into projects where speed control, long-term reliability and compatibility with automation practices are key criteria. It complements an existing architecture effectively without requiring a complete overhaul of the numerical controller or the associated programmable controller.

Industrial applications

The frequency inverter SK0,5ML addresses a wide range of applications in continuous or batch production environments, including sectors with high availability requirements. Typical use cases include speed variation for energy optimisation, reduction of mechanical shocks at start-up, and stabilisation of speed under variable load.

• Continuous conveying and handling : speed control of belts and rollers, section synchronisation and minimising downtime during format changes.
• Pumps, ventilation and industrial HVAC : adapting the operating point to reduce consumption, soft starting and reduced mechanical noise.
• Packaging : driving motors for stretchers, filmers and baggers, with reproducible settings for batch changes.
• Food processing and process industries : speed control for mixing, dosing and transfer, improving process stability under variable load.
• Textile, paper and plastics : driving rewinders and unwinders with adapted ramping to limit mechanical tension on the web.

Integration and communication

The SK0,5ML integrates into automation architectures via standard logic and analogue signals, with compatibility with common practices of programmable logic controllers. Communication cards or interfaces may be available depending on the version, allowing exchange of control and status information with the industrial fieldbuses used on site. Supported protocols must be validated from the exact sub-reference and the marking on the inverter. This approach ensures alignment with existing infrastructures without major modification of the control system.

Commissioning relies on a local keypad or manufacturer software, with a structured parameter tree for setting ramps, protection thresholds and stop functions. In the case of replacement, importing or restoring essential parameters allows rapid recovery of initial operating profiles. Coordination with the numerical controller or the line PLC is achieved via I/O links, clearly distinguishing start/stop commands, speed references and status feedback. Note that this product is intended for asynchronous motors; it does not replace a servo drive dedicated to servomotors.

Availability and warranty

Standard Exchange Industry offers the reference SK0,5ML as supply, standard exchange or repair. Each unit supplied is bench-tested according to a functional validation protocol, with traceability of the checks. Shipping is provided within 24 to 72 hours to over 120 countries. Warranty is applied according to the selected service and SEI conditions. In case of a line stoppage or doubt about electrical compatibility, our technical team supports you to verify the input voltage, the target motor power and the expected control mode. This assistance aims to secure the recommissioning while preserving the coherence of your existing automation architecture.