Active filters perform an important function in electrical systems today and especially in systems that require a high-quality power supply. MWhen selecting an active filter, the designer must select based on load type, harmonic content, and performance requirements. Active Filters will provide a constant adjustment to the system to address load variations and offer instantaneous response to the need for correction of the quality of the power. Therefore Sinotech Group provides active filter solution covering the needs of many different industries for active filtering of the power system while ensuring minimum intrusion to the existing systems.