CA2216434A1 - Arcing fault detection system - Google Patents

Arcing fault detection system

Info

Publication number
CA2216434A1
CA2216434A1 CA002216434A CA2216434A CA2216434A1 CA 2216434 A1 CA2216434 A1 CA 2216434A1 CA 002216434 A CA002216434 A CA 002216434A CA 2216434 A CA2216434 A CA 2216434A CA 2216434 A1 CA2216434 A1 CA 2216434A1
Authority
CA
Canada
Prior art keywords
rate
pulses
signal
change
threshold
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
CA002216434A
Other languages
French (fr)
Other versions
CA2216434C (en
Inventor
Walter H. Strader
James W. Dickens
Stanley J. Brooks
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.)
Schneider Electric USA Inc
Original Assignee
Square D Company
Walter H. Strader
James W. Dickens
Stanley J. Brooks
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 Square D Company, Walter H. Strader, James W. Dickens, Stanley J. Brooks filed Critical Square D Company
Publication of CA2216434A1 publication Critical patent/CA2216434A1/en
Application granted granted Critical
Publication of CA2216434C publication Critical patent/CA2216434C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/123—Automatic release mechanisms with or without manual release using a solid-state trip unit
    • H01H71/125—Automatic release mechanisms with or without manual release using a solid-state trip unit characterised by sensing elements, e.g. current transformers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
    • H02H1/0015—Using arc detectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/20—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition
    • H01H2083/201—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition the other abnormal electrical condition being an arc fault
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/06—Arrangements for supplying operative power
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/44—Emergency 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 the rate of change of electrical quantities

Abstract

A system to detect arcing faults in an electrical distribution system with a line conductor connected to a utility power transformer. The system monitors the rate of change of electrical current in the line conductor and produces a signal which represents the rate of change. The system produces a pulse each time the rate-of-change signal exceeds a selected threshold, filters the rate-of-change signal and/or the pulses to substantially eliminate a signal or pulse which represents changes in the electrical current outside a selected frequency range, monitors the remaining pulses to detect when the number of pulses that occur within a selected time interval exceeds a predetermined threshold, and generates an arc-fault-detection signal in response to the occurrence of a number of pulses which exceed the threshold within the selected time interval.
CA002216434A 1996-02-13 1997-01-31 Arcing fault detection system Expired - Lifetime CA2216434C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/600,512 US5682101A (en) 1995-03-13 1996-02-13 Arcing fault detection system
US08/600,512 1996-02-13
PCT/US1997/001869 WO1997030501A1 (en) 1996-02-13 1997-01-31 Arcing fault detection system

Publications (2)

Publication Number Publication Date
CA2216434A1 true CA2216434A1 (en) 1997-08-21
CA2216434C CA2216434C (en) 2003-04-15

Family

ID=24403895

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002216434A Expired - Lifetime CA2216434C (en) 1996-02-13 1997-01-31 Arcing fault detection system

Country Status (10)

Country Link
US (2) US5682101A (en)
EP (1) EP0820651B1 (en)
JP (1) JP3886150B2 (en)
KR (1) KR100512194B1 (en)
AU (1) AU2260197A (en)
BR (1) BR9702064A (en)
CA (1) CA2216434C (en)
DE (1) DE69739281D1 (en)
MX (1) MX9707859A (en)
WO (1) WO1997030501A1 (en)

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US5682101A (en) 1997-10-28
US6195241B1 (en) 2001-02-27
CA2216434C (en) 2003-04-15
MX9707859A (en) 1998-04-30
DE69739281D1 (en) 2009-04-16
JP3886150B2 (en) 2007-02-28
KR19980703834A (en) 1998-12-05
WO1997030501A1 (en) 1997-08-21
BR9702064A (en) 1998-06-09
EP0820651B1 (en) 2009-03-04
EP0820651A1 (en) 1998-01-28
AU2260197A (en) 1997-09-02
JPH11504500A (en) 1999-04-20
KR100512194B1 (en) 2005-11-08

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