公开(公告)号：US09797940B2

公开(公告)日：2017-10-24

申请号：US14583891

申请日：2014-12-29

Applicant: EATON CORPORATION

Inventor： David Kolker ,  Chaitanya Bhalwankar ,  Birger Pahl ,  Steven Christopher Schmalz ,  Archit Agarwal

IPC: G01R31/02 ,  H02H1/00 ,  H02H3/08 ,  H02H3/20

CPC classification number: G01R31/025 ,  H02H1/0015 ,  H02H3/08 ,  H02H3/20

Abstract: An AC arc fault detection module includes an LF current section, an LF voltage section, and an HF current section having a plurality of outputs, each output being associated with a respective one of a plurality of frequency sub-bands. The HF current section is structured to, for each of the frequency sub-bands, (i) detect a rise in energy of the frequency sub-band above a first predetermined threshold level for at least a certain amount of time and (ii) cause the associated output to indicate a rise in energy detection in response to detecting the rise in energy above the associated threshold level for at least the associated certain amount of time. The module includes a processing device structured to determine whether an AC arc fault has occurred based on the outputs from the LF and HF current and LF voltage sections.

公开(公告)号：US09768605B2

公开(公告)日：2017-09-19

申请号：US14584122

申请日：2014-12-29

Applicant: EATON CORPORATION

Inventor： David Kolker ,  Chaitanya Bhalwankar ,  Birger Pahl ,  Steven Christopher Schmalz ,  Archit Agarwal

IPC: H02H1/00 ,  G01R19/165 ,  G01R31/02 ,  G01R31/00

CPC classification number: H02H1/0015 ,  G01R19/165 ,  G01R31/008 ,  G01R31/024 ,  G01R31/025

Abstract: A DC arc fault detection module includes a current detecting section having at least one output, wherein the current detecting section is structured to determine whether at least one signal based on a current measured from a DC supply line exceeds at least one corresponding predetermined threshold level and cause the at least one output to indicate that the threshold level has been exceeded. The module also includes a processing device structured to: (i) receive the at least one output, (ii) determine whether an arc fault in the DC electrical system has occurred based on at least the at least one output, (iii) determine an estimation of background noise based on at least one signal indicative of a current on the DC supply line, and (iv) adjust the at least one corresponding predetermined threshold level based on the estimation of background noise.

公开(公告)号：US09797941B2

公开(公告)日：2017-10-24

申请号：US14583933

申请日：2014-12-29

Applicant: EATON CORPORATION

Inventor： David Kolker ,  Chaitanya Bhalwankar ,  Birger Pahl ,  Steven Christopher Schmalz ,  Archit Agarwal

IPC: G01R31/02 ,  H02H1/00 ,  H02H3/08 ,  H02H3/20

CPC classification number: G01R31/025 ,  H02H1/0015 ,  H02H3/08 ,  H02H3/20

Abstract: A DC arc fault detection module includes an LF current section, an LF voltage section, and an HF current section having a plurality of outputs, each output being associated with a respective one of a plurality of frequency sub-bands. The HF current section is structured to, for each of the frequency sub-bands, (i) detect a rise in energy of the frequency sub-band above a first predetermined threshold level for at least a certain amount of time and (ii) cause the associated output to indicate a rise in energy detection in response to detecting the rise in energy above the associated threshold level for at least the associated certain amount of time. The module includes a processing device structured to determine whether a DC arc fault has occurred based on the outputs from the LF and HF current and LF voltage sections.

公开(公告)号：US09612267B2

公开(公告)日：2017-04-04

申请号：US14584127

申请日：2014-12-29

Applicant: EATON CORPORATION

Inventor： David Kolker ,  Chaitanya Bhalwankar ,  Birger Pahl ,  Steven Christopher Schmalz ,  Archit Agarwal

IPC: H02H3/00 ,  G01R31/02 ,  G01R19/165 ,  G01R31/00 ,  H02H1/00 ,  H02H3/44 ,  H02H3/08 ,  H02H3/16 ,  H02H3/04

CPC classification number: G01R31/024 ,  G01R19/16533 ,  G01R31/008 ,  G01R31/025 ,  H02H1/0015 ,  H02H3/044 ,  H02H3/08 ,  H02H3/162 ,  H02H3/44

Abstract: An AC arc fault detection module includes a current detecting section having at least one output and being structured to determine whether at least one signal based on a current measured from an AC phase line exceeds at least one corresponding predetermined threshold level and cause the at least one output to indicate that the threshold has been exceeded. The module also includes a processing device structured to: (i) receive the at least one output, (ii) determine whether an arc fault in the AC electrical system has occurred based on at least the at least one output, (iii) determine an estimation of background noise based on at least one signal indicative of a current on the AC phase line, and (iv) adjust the at least one corresponding predetermined threshold level based on the estimation of background noise.