SVR automatic feeder voltage regulator is tracking the variation in feeder voltage and changing the turn ratio of the built-in transformer, thus maintaining its output voltage within the permissible range. SVR functions satisfactorily when its input voltage fluctuates within 30% of its rating, ideal for feeder lines with large voltage drops and/or voltage fluctuations. Installed at the medium or receiving end of a feeder, SVR can effectively keep the user voltage at desired level and reduce power loss over the line. Moreover, SVR can also be applied to substations without on-load tap-changer transformers. Installed at the outgoing-line-side in such substations, SVR maintains the outlet bus voltage at specified values.
SVR has been patented for its originality (Patent NO 02 2 92527.9) and received certificates as follows:
 Apr 2004, State Torch Program Project
 Dec 2004, Patent of Utility Model issued by State Intellectual Property Office(SIPO)
 Apr 2004, State Strongly Recommended Product
 2005 Xi’an Priority Technology Industrialization Product
 State Power Grid Corporation Strongly Recommended “Four New Product” for rural power networks
As an integration of IT and traditional electric engineering, the SVR has advantages over similar feeder voltage regulators of Japanese and other foreign makes in some of the technical parameters and particularly in cost performance. Thousands of SVR feeder voltage regulators are now operating safely and effectively on power distribution lines, industrial complexes, and substations.