公开(公告)号：US20200153227A1

公开(公告)日：2020-05-14

申请号：US16189122

申请日：2018-11-13

Applicant: ROCKWELL AUTOMATION TECHNOLOGIES, INC.

Inventor： Andrew E. Carlson ,  Daniel J. Bolda ,  Joseph A. Johnson ,  David M. Messersmith

IPC: H02H1/04 ,  G01R19/00 ,  G01R31/02

Abstract: Current transformer circuit systems and methods dynamically switch a load. The current transformer circuit includes a current source circuit including at least one current transformer to produce a current output wave. A burden circuit includes at least one burden resistor and a voltage sensor, at least a portion of the current output wave to be passed through the burden resistor, and the voltage sensor to sense a voltage across the respective at least one burden resistor. A switch circuit includes at least one switch, the switch circuit coupled to the burden circuit. A microcontroller circuit includes a microcontroller, the microcontroller circuit coupled to a power circuit and the switch circuit, the microcontroller being configured to control the switch circuit to dynamically switch a secondary loading of the at least one current transformer between the burden resistor and a low resistance load.