US Patent Issued to ABB Schweiz on Dec. 30 for "Method of performing circuit opening and closing operation, computer program, control system and power system" (Swedish Inventors)

ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,512,280, issued on Dec. 30, was assigned to ABB Schweiz AG (Baden, Switzerland).

"Method of performing circuit opening and closing operation, computer program, control system and power system" was invented by Elisabeth Lindell (Vasteras, Sweden) and Stefan Halen (Vasteras, Sweden).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method of performing a circuit opening and closing operation in a power system including three phases, a three-phase transformer, and a circuit breaker system, the method including a) opening all three phases simultaneously such that a reference current of a reference phase is interrupted first at a first current zero crossing af...