REQATECH's servo regulators, REQASTAR-UE Series provide safety in advance level for voltage recovery. REQATECH has designed the most reliable servo regulators with experience more than 20 years inmarket. High regulation rate (200Volt/second) when comparing to its competitors, low maintenance requirement, longterm running, compact elegant design, entry level protection for critical loads, guarantee protection for defect arising from mains malfunction. REQASTAR-UE servo regulator is the necessity devices of industry world against today's mains poblem.