Low Frequency Online UPS Designed for heavy-duty industrial environments and critical infrastructure, our Low Frequency Online UPS series offers unmatched ruggedness and reliable galvanic isolation. Built with heavy-duty isolation transformers (transformer-based design) and driven by cutting-edge DSP control technology, these systems excel at handling high-inrush currents and inductive loads. Our AKT-33 series features three-phase input and output with capacities ranging from 20kVA up to 300kVA, delivering a flawless pure sine wave to safeguard factory machinery, medical facilities, and large-scale industrial operations.