公开(公告)号：US20240312688A1

公开(公告)日：2024-09-19

申请号：US18183710

申请日：2023-03-14

Applicant: Schweitzer Engineering Laboratories, Inc.

Inventor： Timothy M. Minteer ,  David Kenny ,  Johnny J. Moore ,  Raymond W. Rice ,  Benjamin T. Rowland ,  Lyssa W. Blood ,  Brett Taggart

IPC: H01F27/06 ,  G01R21/00 ,  H01F27/29 ,  H01F38/28 ,  H02J50/00

CPC classification number: H01F27/06 ,  G01R21/00 ,  H01F27/29 ,  H01F38/28 ,  H02J50/001

Abstract: A current transformer (CT) isolation clamp is mounted to a phase conductor and includes a step-down CT transformer and a passive isolation transformer. A three-phase power-harvesting sensor system includes a plurality of CT isolation clamps mounted to phase conductors in a three-phase power system. An electronics module is connected to the CT isolation clamps. The electronics module may include a sensing circuit to determine power characteristics of the three-phase power system based on the outputs of the CT isolation clamps. The electronics module may include a communication subsystem to transmit the determined power characteristics to local or remote devices. Additionally, the electronics module may include a power harvesting circuit to harvest power to operate the sensing circuit and the communication subsystem.