US Patent Issued to Schweitzer Engineering Laboratories on Dec. 23 for "Fault current sensor with adjacent phase fault immunity" (Washington, Idaho Inventors)

ALEXANDRIA, Va., Dec. 23 -- United States Patent no. 12,504,446, issued on Dec. 23, was assigned to Schweitzer Engineering Laboratories Inc. (Pullman, Wash.).

"Fault current sensor with adjacent phase fault immunity" was invented by Normann Fischer (Colfax, Wash.), Nathan A. Braun (Pullman, Wash.) and Ed Atienza (Nampa, Idaho).

According to the abstract* released by the U.S. Patent & Trademark Office: "A multiport current sensor is disclosed for measuring current. The sensor may include multiple CT or Rogowski coil segments or sections arranged in a closed loop configuration around a monitored phase line or other electrical conductor. An adjacent phase rejection circuit compares the magnitudes and/or phase angles of the voltage signals fr...