LS Electric SV MV7 Medium Voltage Drive

The LS Electric SV MV7 is a medium voltage variable frequency drive system engineered for the direct speed control of large induction motors fed at 3.3 kV, 6.6 kV, and 11 kV in Saudi Arabia's power-intensive industrial sectors — oil and gas, petrochemicals, desalination, mining, and electric power generation. Available in power ratings from 200 kW to 10,000 kW, the MV7 uses a cell-based multilevel converter topology with series-connected power cells, generating a near-sinusoidal output voltage waveform that dramatically reduces motor stress, eliminates the need for output sine wave filters, and allows the drive to be connected directly to existing standard motors without motor rewinding or insulation upgrading. The multilevel output also reduces harmonic injection into the MV supply network, keeping THDi below 5% without input filters — a critical requirement for compliance with SEC grid code and IEC 61000-3-6 harmonic limits at Saudi industrial sites.

The MV7's cell-bypass technology enables the drive to continue running at reduced power output even when one or more power cells fail, providing a level of fault tolerance that is critical for processes where motor shutdown causes production loss or safety risk — such as seawater desalination high-pressure pumps, natural gas compressor trains, and large cooling water pumps at petrochemical plants. Each power cell is designed for hot-swap replacement by a single technician without specialist tools, minimising maintenance downtime at remote Saudi installations. The control system employs advanced sensorless vector algorithms developed specifically for MV motor characteristics, with optional closed-loop encoder feedback for the highest precision applications.

In Saudi Arabia, medium voltage drives are primarily used by Saudi Aramco, SABIC, MARAFIQ, SWCC, and Ma'aden for their largest rotating equipment — multi-megawatt pumps, compressors, fans, and mills where the energy savings from variable speed operation justify the capital cost of MV drive systems. The MV7 competes with ABB, Siemens, and Rockwell medium voltage drives but is positioned at a significantly lower capital cost, making it attractive to Saudi projects where tight capex budgets require careful cost optimisation without compromising technical performance or safety. CE, UL, and KC certifications cover all applicable IEC and ANSI standards for medium voltage drive systems.

Razz Middle East represents LS Electric for MV7 projects in Saudi Arabia, providing full project support from initial feasibility study and power system study through to installation supervision, commissioning, and operator training. We engage with EPC contractors, end-user engineering departments, and consulting engineers at concept stage to ensure MV7 specifications are correctly aligned with project requirements. Contact our MV drive specialists for a detailed technical proposal and SAR project pricing.