公开(公告)号：US09897647B2

公开(公告)日：2018-02-20

申请号：US14722412

申请日：2015-05-27

Applicant: EATON CORPORATION

Inventor： Alan Kenji Hayashi ,  Brian Zachary Zaremski ,  Zhi Gao

IPC: G06F19/00 ,  G01R31/28 ,  G01R19/00 ,  G01R31/42 ,  G01R19/25 ,  G01R21/133 ,  G01R22/06 ,  G01R22/10 ,  G01R25/00 ,  G01R31/04

CPC classification number: G01R31/282 ,  G01R19/0084 ,  G01R19/2513 ,  G01R21/133 ,  G01R22/06 ,  G01R22/10 ,  G01R25/00 ,  G01R31/041 ,  G01R31/42 ,  G01R31/44

Abstract: A method and apparatus for detecting the wiring configuration of an electric power system based upon a particular voltage ratio that is determined for the electric power system. Also a method and apparatus for diagnosing voltage swap conditions in an electric power system. Finally, a method and apparatus for identifying virtual meters in an electric power system.

公开(公告)号：US10088546B2

公开(公告)日：2018-10-02

申请号：US14267451

申请日：2014-05-01

Applicant: EATON CORPORATION

Inventor： Zhi Gao ,  Brian Zachary Zaremski ,  Alan Kenji Hayashi

IPC: G01R19/00 ,  G01R29/16 ,  G01R35/00 ,  G01R21/133 ,  G01R31/04

Abstract: A system for a three-phase electric power system includes a plurality of voltage sensors sensing three-phase voltages of the three-phase electric power system; a plurality of current sensors sensing three-phase currents of the three-phase electric power system; and a number of analog-to-digital converters converting the sensed three-phase voltages and the sensed three-phase currents of the three-phase electric power system to corresponding digital values. A processor calculates from the corresponding digital values at least two phase angles between voltage and current for at least two of three phases of the three-phase electric power system, diagnoses polarities and phase associations for at least two of the current sensors based on, for each of the at least two current sensors, a predetermined wiring configuration of the three-phase electric power system and a corresponding one of the at least two phase angles being within a corresponding predetermined angular range, and outputs corresponding diagnosis results.

公开(公告)号：US09829519B2

公开(公告)日：2017-11-28

申请号：US14722481

申请日：2015-05-27

Applicant: EATON CORPORATION

Inventor： Alan Kenji Hayashi ,  Brian Zachary Zaremski ,  Zhi Gao

IPC: G01R29/16 ,  G01R25/00 ,  G01R31/28 ,  G01R21/133 ,  G01R35/00 ,  G01R31/04

CPC classification number: G01R25/00 ,  G01R21/133 ,  G01R31/041 ,  G01R31/2829 ,  G01R35/005

Abstract: A system and method for a branch current monitoring system employing a 2-Phase Wye, a Single-Phase 3-Wire or a Single-Phase 2-Wire wiring configuration that is configured to identify a phase association and a polarity for a branch circuit current sensor using the phase angle between voltage and current. Also, a system and method for verifying phase association and polarity determinations for branch circuit current sensors that utilizes real and reactive power measurements.