公开(公告)号：US20180172767A1

公开(公告)日：2018-06-21

申请号：US15386953

申请日：2016-12-21

Applicant: EATON CORPORATION

Inventor： XIN ZHOU ,  ZHI GAO ,  JAMES L. LAGREE ,  ROBERT W. MUELLER

IPC: G01R31/333 ,  H01H9/54

CPC classification number: H01H9/54 ,  G01R31/3277 ,  H01H1/0015 ,  H01H71/04 ,  H01H2071/044

Abstract: An electronic trip unit for a circuit interrupter includes a line side voltage sensing module for measuring first voltages on a line side of separable contacts, a load side voltage sensing module for measuring second voltages on a load side of the separable contacts, a current sensor, and a main controller. The main controller is further structured and configured to: (i) for each of a plurality of arc interruption events in the circuit interrupter, determine a mass loss due to contact erosion during the arc interruption event based on one or more of the first voltages, the second voltages and the current measured by the current sensor, (ii) determine a total mass loss based on each determined mass loss due to contact erosion, and (iii) monitor a remaining life of the separable contacts based on the determined total mass loss due to contact erosion.

公开(公告)号：US20150042311A1

公开(公告)日：2015-02-12

申请号：US14267451

申请日：2014-05-01

Applicant: EATON CORPORATION

Inventor： ZHI GAO ,  BRIAN ZACHARY ZAREMSKI ,  ALAN KENJI HAYASHI

IPC: G01R35/00

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

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.

Abstract translation: 一种用于三相电力系统的系统包括感测三相电力系统的三相电压的多个电压传感器; 检测三相电力系统的三相电流的多个电流传感器; 以及将感测到的三相电压和感测到的三相电力系统的三相电流转换为相应的数字值的多个模数转换器。 处理器从相应的数字值计算三相电力系统的三相中的至少两相的电压和电流之间的至少两个相位角，诊断至少两个电流传感器的极性和相位关联，基于 所述至少两个电流传感器中的每一个，所述三相电力系统的预定布线配置和所述至少两个相位角中的对应的一个处于相应的预定角度范围内，并输出相应的诊断结果。

公开(公告)号：US20160349311A1

公开(公告)日：2016-12-01

申请号：US14722481

申请日：2015-05-27

Applicant: EATON CORPORATION

Inventor： ALAN KENJI HAYASHI ,  BRIAN ZACHARY ZAREMSKI ,  ZHI GAO

IPC: G01R31/28 ,  G01R21/133

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.

Abstract translation: 一种分支电流监测系统的系统和方法，该系统采用2相Wye，单相3线或单相2线制配置，用于识别分支电路电流的相位关联和极性 传感器使用电压和电流之间的相位角。 而且，一种用于验证利用实际和无功功率测量的分支电路电流传感器的相位关联和极性确定的系统和方法。

公开(公告)号：US20180204699A1

公开(公告)日：2018-07-19

申请号：US15405513

申请日：2017-01-13

Applicant: EATON CORPORATION

Inventor： DANIEL A. HOSKO ,  THEODORE J. MILLER ,  ZHI GAO ,  RANDY P. SHVACH

IPC: H01H71/74 ,  H02H1/00 ,  H02H3/02 ,  H02H1/06 ,  H02H3/05 ,  G05B15/02

CPC classification number: H01H71/74 ,  G05B15/02 ,  H02H1/0015 ,  H02H1/0092 ,  H02H1/06 ,  H02H3/006 ,  H02H3/02 ,  H02H3/05 ,  H02H3/16 ,  H02H3/33

Abstract: A circuit interrupter includes an electronic trip unit structured to receive power from a power supply. The electronic trip unit includes a start-up process and is structured to proceed through the start-up process when the electronic trip unit begins receiving power from the power supply and a timing circuit including a capacitor structured to begin charging when the electronic trip unit begins receiving power from the power supply. The electronic trip unit includes a processor that is structured to read a voltage across the capacitor when the start-up process has completed and to determine an elapsed time of the start-up process based on the read voltage across the capacitor.

公开(公告)号：US20180174724A1

公开(公告)日：2018-06-21

申请号：US15386063

申请日：2016-12-21

Applicant: EATON CORPORATION

Inventor： ZHI GAO ,  DANIEL A. HOSKO ,  THEODORE J. MILLER

IPC: H01F5/02 ,  H01F38/20 ,  H01F27/28 ,  G01R15/18

CPC classification number: H01F5/02 ,  G01R15/181 ,  G01R19/2506 ,  H01F27/2895 ,  H01F38/20 ,  H03H17/04

Abstract: A current sensing circuit for use with a Rogowski coil arranged around a conductor having a primary current includes input terminals structured to receive an output voltage of the Rogowski coil, an analog to digital converter structured to convert a differential voltage to a digital differential voltage signal, a digital integrator structured to receive the digital differential voltage signal, to implement a discrete-time transfer function that is a transform of a transfer function of an analog integrator, and to output a digital integrator output signal, and a direct current blocker filter structured to remove a direct current bias from the digital integrator output signal and to output a digital current output signal that is proportional to the primary current in the conductor.

公开(公告)号：US20160349310A1

公开(公告)日：2016-12-01

申请号：US14722412

申请日：2015-05-27

Applicant: EATON CORPORATION

Inventor： ALAN KENJI HAYASHI ,  BRIAN ZACHARY ZAREMSKI ,  ZHI GAO

IPC: G01R31/28 ,  G01R19/00

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.

Abstract translation: 一种用于基于为电力系统确定的特定电压比检测电力系统的配线结构的方法和装置。 还有一种用于诊断电力系统中的电压互换条件的方法和装置。 最后，一种用于识别电力系统中的虚拟仪表的方法和装置。