CA2248486A1 - Apparatus for detecting arcing faults and ground faults in multiwire branch electric power circuits - Google Patents

Apparatus for detecting arcing faults and ground faults in multiwire branch electric power circuits

Info

Publication number
CA2248486A1
CA2248486A1 CA002248486A CA2248486A CA2248486A1 CA 2248486 A1 CA2248486 A1 CA 2248486A1 CA 002248486 A CA002248486 A CA 002248486A CA 2248486 A CA2248486 A CA 2248486A CA 2248486 A1 CA2248486 A1 CA 2248486A1
Authority
CA
Canada
Prior art keywords
faults
arc fault
conductors
line conductors
ungrounded
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002248486A
Other languages
French (fr)
Other versions
CA2248486C (en
Inventor
Robert Tracy Elms
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eaton Intelligent Power Ltd
Original Assignee
Eaton Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Eaton Corp filed Critical Eaton Corp
Publication of CA2248486A1 publication Critical patent/CA2248486A1/en
Application granted granted Critical
Publication of CA2248486C publication Critical patent/CA2248486C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00Details of emergency protective circuit arrangements
    • H02H1/0007Details of emergency protective circuit arrangements concerning the detecting means
    • H02H1/0015Using arc detectors
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00Details of emergency protective circuit arrangements
    • H02H1/0038Details of emergency protective circuit arrangements concerning the connection of the detecting means, e.g. for reducing their number
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02Details
    • H02H3/05Details with means for increasing reliability, e.g. redundancy arrangements
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/08Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
    • H02H3/10Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current additionally responsive to some other abnormal electrical conditions
    • H02H3/105Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current additionally responsive to some other abnormal electrical conditions responsive to excess current and fault current to earth

Abstract

A multiwire branch circuit including two line conductors and a grounded, common neutral conductor is protected by a two pole circuit breaker connected to interrupt current flow in the two ungrounded line conductors. Three separate protection circuits provide arc fault protection for each of the ungrounded line conductors and ground fault protection for all three conductors. The arc fault detectors use the bimetal of the thermal-magnetic trip device for the associated line conductor, and therefore, are individually referenced to the associated line voltage. Hence, the outputs of the arc fault detectors are electrically isolated from each other and from the output of the ground fault detector, but operate a common trip circuit to open the two pole circuit breaker. The arc fault detectors have separate isolated power supplies. The ground fault detector is powered by a supply which is energized if either of the ungrounded line conductors is energized.
CA002248486A 1997-09-29 1998-09-28 Apparatus for detecting arcing faults and ground faults in multiwire branch electric power circuits Expired - Lifetime CA2248486C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/939,263 US5889643A (en) 1997-09-29 1997-09-29 Apparatus for detecting arcing faults and ground faults in multiwire branch electric power circuits
US08/939,263 1997-09-29

Publications (2)

Publication Number Publication Date
CA2248486A1 true CA2248486A1 (en) 1999-03-29
CA2248486C CA2248486C (en) 2006-04-04

Family

ID=25472849

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002248486A Expired - Lifetime CA2248486C (en) 1997-09-29 1998-09-28 Apparatus for detecting arcing faults and ground faults in multiwire branch electric power circuits

Country Status (2)

Country Link
US (1) US5889643A (en)
CA (1) CA2248486C (en)

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US6577138B2 (en) * 2001-08-24 2003-06-10 Eaton Corporation Apparatus for detecting arcing and overcurrents in dc electrical systems subject to cyclic disturbances
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US7944660B2 (en) * 2007-06-15 2011-05-17 General Electric Company Micro-electromechanical system based selectively coordinated protection systems and methods for electrical distribution
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US7589942B2 (en) * 2007-06-15 2009-09-15 General Electric Company MEMS based motor starter with motor failure detection
US7903382B2 (en) * 2007-06-19 2011-03-08 General Electric Company MEMS micro-switch array based on current limiting enabled circuit interrupting apparatus
US8072723B2 (en) * 2007-06-19 2011-12-06 General Electric Company Resettable MEMS micro-switch array based on current limiting apparatus
US7508096B1 (en) 2007-09-20 2009-03-24 General Electric Company Switching circuit apparatus having a series conduction path for servicing a load and switching method
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US7554222B2 (en) * 2007-11-01 2009-06-30 General Electric Company Micro-electromechanical system based switching
US7839611B2 (en) * 2007-11-14 2010-11-23 General Electric Company Programmable logic controller having micro-electromechanical system based switching
US8659857B2 (en) * 2008-07-24 2014-02-25 Technology Reasearch Corporation Leakage current detection and interruption circuit powered by leakage current
US7944654B2 (en) * 2008-11-10 2011-05-17 Scott Gary W Multiple-pole circuit breaker with shared current sensor for arcing fault detection
US9349559B2 (en) 2009-03-23 2016-05-24 Siemens Industry, Inc. Low-profile electronic circuit breakers, breaker tripping mechanisms, and systems and methods of using same
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CN104034991B (en) * 2013-03-04 2017-08-01 益而益(集团)有限公司 Earth Fault Detection and resetting means
US9577423B2 (en) * 2013-04-11 2017-02-21 Eaton Corporation Power system including a load panel protecting a facility from a broken or missing neutral of a split phase electrical distribution configuration
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Also Published As

Publication number Publication date
US5889643A (en) 1999-03-30
CA2248486C (en) 2006-04-04

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Effective date: 20180928