US Patent Issued to Hitachi Energy on Oct. 6 for "Monitoring a transformer comprising a tap changer" (Swedish Inventors)

ALEXANDRIA, Va., Oct. 6 -- United States Patent no. 12,754,255, issued on Oct. 6, was assigned to Hitachi Energy Ltd (Zurich, Switzerland).

"Monitoring a transformer comprising a tap changer" was invented by Nilanga Abeywickrama (Vasteras, Sweden), Tord Bengtsson (Vasteras, Sweden), Cecilia Forssen (Vasteras, Sweden) and Joachim Schiessling (Enkoping, Sweden).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for monitoring a transformer comprising a tap changer, wherein extracted information comprises a circulating current amplitude and/or a circulating current time covering at least a part of the tap change operation represented by at least one current difference waveform, and/or a transition current t...