CA975429A - Apparatus for indicating when current exceeds a predetermined level and when said level is exceeded for a predetermined period of time - Google Patents

Apparatus for indicating when current exceeds a predetermined level and when said level is exceeded for a predetermined period of time

Info

Publication number
CA975429A
CA975429A CA171,381A CA171381A CA975429A CA 975429 A CA975429 A CA 975429A CA 171381 A CA171381 A CA 171381A CA 975429 A CA975429 A CA 975429A
Authority
CA
Canada
Prior art keywords
level
predetermined
exceeded
indicating
time
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.)
Expired
Application number
CA171,381A
Other versions
CA171381S (en
Inventor
John A. Freeze
Garlington C. Wilburn
Elmo D. Price (Jr.)
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.)
CBS Corp
Original Assignee
Westinghouse Electric 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 Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Application granted granted Critical
Publication of CA975429A publication Critical patent/CA975429A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/40—Structural association with built-in electric component, e.g. fuse
    • H01F27/402—Association of measuring or protective means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
    • G01R19/16585—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 for individual pulses, ripple or noise and other applications where timing or duration is of importance
CA171,381A 1972-06-15 1973-05-15 Apparatus for indicating when current exceeds a predetermined level and when said level is exceeded for a predetermined period of time Expired CA975429A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US26305572A 1972-06-15 1972-06-15

Publications (1)

Publication Number Publication Date
CA975429A true CA975429A (en) 1975-09-30

Family

ID=23000190

Family Applications (1)

Application Number Title Priority Date Filing Date
CA171,381A Expired CA975429A (en) 1972-06-15 1973-05-15 Apparatus for indicating when current exceeds a predetermined level and when said level is exceeded for a predetermined period of time

Country Status (3)

Country Link
US (1) US3775675A (en)
JP (1) JPS49133070A (en)
CA (1) CA975429A (en)

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US5185684A (en) * 1991-03-28 1993-02-09 Eaton Corporation Frequency selective arc detection
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US5434509A (en) * 1992-07-30 1995-07-18 Blades; Frederick K. Method and apparatus for detecting arcing in alternating-current power systems by monitoring high-frequency noise
US5729145A (en) * 1992-07-30 1998-03-17 Siemens Energy & Automation, Inc. Method and apparatus for detecting arcing in AC power systems by monitoring high frequency noise
US5432455A (en) * 1992-07-30 1995-07-11 Blades; Frederick K. Method and apparatus for detecting arcing in alternating current power systems by monitoring high-frequency noise
US5452223A (en) * 1993-08-20 1995-09-19 Eaton Corporation Arc detection using current variation
US6313641B1 (en) 1995-03-13 2001-11-06 Square D Company Method and system for detecting arcing faults and testing such system
US6242993B1 (en) 1995-03-13 2001-06-05 Square D Company Apparatus for use in arcing fault detection systems
US6034611A (en) * 1997-02-04 2000-03-07 Square D Company Electrical isolation device
US6377427B1 (en) 1995-03-13 2002-04-23 Square D Company Arc fault protected electrical receptacle
US6259996B1 (en) 1998-02-19 2001-07-10 Square D Company Arc fault detection system
US6313642B1 (en) 1995-03-13 2001-11-06 Square D Company Apparatus and method for testing an arcing fault detection system
US5682101A (en) * 1995-03-13 1997-10-28 Square D Company Arcing fault detection system
US5825598A (en) * 1997-02-11 1998-10-20 Square D Company Arcing fault detection system installed in a panelboard
US6532424B1 (en) 1995-03-13 2003-03-11 Square D Company Electrical fault detection circuit with dual-mode power supply
US6246556B1 (en) 1995-03-13 2001-06-12 Square D Company Electrical fault detection system
US6452767B1 (en) 1995-03-13 2002-09-17 Square D Company Arcing fault detection system for a secondary line of a current transformer
US5590012A (en) * 1995-03-30 1996-12-31 Siemens Energy & Automation, Inc. Electric arc detector sensor circuit
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US5847913A (en) * 1997-02-21 1998-12-08 Square D Company Trip indicators for circuit protection devices
US5946179A (en) * 1997-03-25 1999-08-31 Square D Company Electronically controlled circuit breaker with integrated latch tripping
US5839092A (en) * 1997-03-26 1998-11-17 Square D Company Arcing fault detection system using fluctuations in current peaks and waveforms
US6567250B1 (en) 1998-02-19 2003-05-20 Square D Company Arc fault protected device
US6782329B2 (en) 1998-02-19 2004-08-24 Square D Company Detection of arcing faults using bifurcated wiring system
US6477021B1 (en) 1998-02-19 2002-11-05 Square D Company Blocking/inhibiting operation in an arc fault detection system
US6621669B1 (en) 1998-02-19 2003-09-16 Square D Company Arc fault receptacle with a feed-through connection
US5986860A (en) * 1998-02-19 1999-11-16 Square D Company Zone arc fault detection
US6625550B1 (en) 1998-02-19 2003-09-23 Square D Company Arc fault detection for aircraft
DE19841543A1 (en) * 1998-09-11 2000-04-06 Schwerionenforsch Gmbh Device and method for monitoring a signal
US6544200B1 (en) 2001-08-31 2003-04-08 Bed-Check Corporation Electronic patient monitor with automatically configured alarm parameters
US7151656B2 (en) 2001-10-17 2006-12-19 Square D Company Arc fault circuit interrupter system
US7136265B2 (en) 2001-10-17 2006-11-14 Square D Company Load recognition and series arc detection using bandpass filter signatures
US7068480B2 (en) 2001-10-17 2006-06-27 Square D Company Arc detection using load recognition, harmonic content and broadband noise
US20050212450A1 (en) * 2004-03-16 2005-09-29 Scientific Systems Research Limited Method and system for detecting electrical arcing in a plasma process powered by an AC source
US7253637B2 (en) 2005-09-13 2007-08-07 Square D Company Arc fault circuit interrupter system
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JP5778541B2 (en) * 2011-09-30 2015-09-16 株式会社サンコーシヤ Surge protection device and management system for surge protection device
US9829542B2 (en) * 2014-05-15 2017-11-28 Microchip Technology Incorporated Circuit for measuring power violations using high side current sensing

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US2114865A (en) * 1937-02-06 1938-04-19 Gen Electric Peak alternating current measuring apparatus
US3029423A (en) * 1960-05-18 1962-04-10 Ibm Voltage monitor
US3217246A (en) * 1962-11-06 1965-11-09 Gen Precision Inc Apparatus for determining flaws in the insulation of an insulated wire by passing the wire through a mercury bath
GB1066472A (en) * 1964-05-07 1967-04-26 British Broadcasting Corp Improvements in and relating to the testing of magnetic recording tape
US3536994A (en) * 1968-03-28 1970-10-27 Minnesota Mining & Mfg Dropout counter with continuous integration and moving counting period
US3573614A (en) * 1968-04-26 1971-04-06 Us Army Transient voltage indicating, measuring, and counting circuit

Also Published As

Publication number Publication date
US3775675A (en) 1973-11-27
JPS49133070A (en) 1974-12-20

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