US Patent Issued to ABB Schweiz on April 7 for "System and methods for ground fault threshold calibration using self-test circuit" (Kentucky, Connecticut Inventors)

ALEXANDRIA, Va., April 7 -- United States Patent no. 12,596,165, issued on April 7, was assigned to ABB Schweiz AG (Baden, Switzerland).

"System and methods for ground fault threshold calibration using self-test circuit" was invented by Hetul S. Patel (Waterford, Conn.) and Gregory L. Jones (Lagrange, Ky.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A system for calibrating ground fault threshold using auto-monitoring circuit, the system is provided. The system includes a circuit board comprising a self-injection circuit, a rectified voltage detection circuit, and a controller. The controller is configured to provide, using the self-injection circuit, a trigger pulse as input to the self-injection circuit....