Silverstone medium voltage variable frequency drives provide speed regulation, soft starting and energy saving for MV motors driving fans, pumps, compressors and mills. Cascaded H-bridge multi-level topology with a phase-shift isolation transformer gives near-sinusoidal output and IEEE 519-compliant input — sourced from qualified manufacturers, configured to your motor and grid, and delivered with factory acceptance test reports.
Key Specifications
Product class
Medium voltage variable frequency drive (cascaded H-bridge multi-level)
Typical configurations shown. Final ratings, dimensions and test reports are confirmed per project datasheet — include your specification with the inquiry. Download brochure (PDF) →
Typical Applications
Thermal power plantsUrban water supplyPetroleum & chemicalMining & metallurgyCement plantsFans, pumps & compressors
Frequently Asked Questions
What information do you need to quote a medium voltage VFD?
Motor rated power and voltage, load type (fan, pump, compressor, mill), grid voltage and frequency, bypass requirement, quantity and destination port. With these, we return a priced offer with lead time within 24 hours on working days.
Which motors can these drives run?
The cascaded multi-level output is a near-sinusoidal PWM waveform that drives standard asynchronous or synchronous motors directly — no output filter, no motor de-rating and no dV/dt stress on motor or cable insulation.
Do the drives meet harmonic limits?
Yes. The phase-shifted multi-winding input transformer gives multi-pulse rectification (30 pulses for 6kV, 54 pulses for 11kV), compliant with IEEE 519-1992 and GB/T 14549-1993 without additional input filters or reactive power compensators.
Can you supply VFDs as part of a complete motor drive package?
Yes. Silverstone delivers complete MV motor drive and substation EPC packages — drives, switchgear, transformers and civil/electrical works under one contract. See our EPC service page.
