IT1071198B - Apparecchio di sorveglianza per sistemi di distribuzione di energia elettrica isolati da terra - Google Patents

Apparecchio di sorveglianza per sistemi di distribuzione di energia elettrica isolati da terra

Info

Publication number
IT1071198B
IT1071198B IT69091/76A IT6909176A IT1071198B IT 1071198 B IT1071198 B IT 1071198B IT 69091/76 A IT69091/76 A IT 69091/76A IT 6909176 A IT6909176 A IT 6909176A IT 1071198 B IT1071198 B IT 1071198B
Authority
IT
Italy
Prior art keywords
distribution systems
electricity distribution
surveillance apparatus
insulated electricity
earth
Prior art date
Application number
IT69091/76A
Other languages
English (en)
Italian (it)
Original Assignee
Square D Co
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 Co filed Critical Square D Co
Application granted granted Critical
Publication of IT1071198B publication Critical patent/IT1071198B/it

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/16—Measuring impedance of element or network through which a current is passing from another source, e.g. cable, power line
    • G01R27/18—Measuring resistance to earth, i.e. line to ground
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/52—Testing for short-circuits, leakage current or ground faults
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/58—Testing of lines, cables or conductors

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
IT69091/76A 1975-08-29 1976-08-26 Apparecchio di sorveglianza per sistemi di distribuzione di energia elettrica isolati da terra IT1071198B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/609,002 US3976987A (en) 1975-08-29 1975-08-29 Dual channel dynamic line isolation monitor

Publications (1)

Publication Number Publication Date
IT1071198B true IT1071198B (it) 1985-04-02

Family

ID=24438966

Family Applications (1)

Application Number Title Priority Date Filing Date
IT69091/76A IT1071198B (it) 1975-08-29 1976-08-26 Apparecchio di sorveglianza per sistemi di distribuzione di energia elettrica isolati da terra

Country Status (8)

Country Link
US (1) US3976987A (US06633600-20031014-M00021.png)
AU (1) AU504535B2 (US06633600-20031014-M00021.png)
CA (1) CA1052864A (US06633600-20031014-M00021.png)
DE (1) DE2630982C3 (US06633600-20031014-M00021.png)
FR (1) FR2322378A1 (US06633600-20031014-M00021.png)
GB (1) GB1552829A (US06633600-20031014-M00021.png)
IT (1) IT1071198B (US06633600-20031014-M00021.png)
ZA (1) ZA763055B (US06633600-20031014-M00021.png)

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US4080640A (en) * 1976-09-27 1978-03-21 Westinghouse Electric Corporation People-protecting ground fault circuit interrupter
US4206398A (en) * 1978-04-26 1980-06-03 Esb Incorporated Method of and apparatus for detecting ground faults in isolated power supply systems
US4422034A (en) * 1980-01-22 1983-12-20 Toyo Sushinki Kabushiki Kaisha Method for measuring insulation resistance and device therefor
US4417202A (en) * 1981-01-30 1983-11-22 American Standard Inc. Vital DC source ground fault detector apparatus
DE3112952C2 (de) * 1981-03-31 1994-05-05 Walther Bender Gmbh & Co Kg Di Verfahren und Einrichtung zum Bestimmen der Gesamtableitungsimpedanz in einem ungeerdeten Wechselstromnetz
US4528497A (en) * 1982-08-23 1985-07-09 Isolation Systems Limited Method and apparatus for monitoring ground faults in isolated electrical systems
DE3513848A1 (de) * 1985-04-17 1986-10-23 Quante Fernmeldetechnik GmbH, 5600 Wuppertal Schaltung zur ueberwachung der isolationswiderstaende einer schar von baugruppen einer elektrischen anlage mit gemeinsamer erdfreier stromversorgung, insbesondere einer fernmelde- oder signaltechnischen einrichtung
US4809123A (en) * 1986-04-14 1989-02-28 Isco, Inc. Ground fault detector for high-voltage DC power supplies
SE464375B (sv) * 1986-10-03 1991-04-15 Fuji Electric Co Ltd Saett att digitalisera en foersaemring i en avledare av zinkoxidtyp utnyttjande vektorsyntes
FR2616228B1 (fr) * 1987-06-04 1989-09-08 Merlin Gerin Dispositif de controle et de mesure de l'isolement d'un reseau electrique
US5446682A (en) * 1994-03-21 1995-08-29 Square D Company System for calibrating a line isolation monitor
US5448491A (en) * 1994-03-21 1995-09-05 Square D Company Monitor for an ungrounded system
US5450328A (en) * 1994-03-21 1995-09-12 Square D Company System for measuring line to ground impedance
US5514964A (en) * 1994-08-17 1996-05-07 Square D Company System for monitoring a dual voltage ungrounded system for leakage currents
US6081122A (en) * 1995-06-09 2000-06-27 Bausch & Lomb Surgical, Inc. Electrical ground fault detection apparatus
US6388435B1 (en) * 1998-12-31 2002-05-14 General Electric Company Methods and apparatus for voltage measurement
AU2002230681A1 (en) * 2000-11-06 2002-05-15 Ballard Power Systems Corporation Active ground current reduction device
US6667692B2 (en) * 2001-06-29 2003-12-23 Landis+Gyr Inc. Electrical utility meter having harmonic data templates for power quality alarm thresholds
DE60209799T2 (de) 2001-12-03 2007-01-25 Ekos Corp., Bothell Katheter mit mehreren ultraschall-abstrahlenden teilen
US7323878B2 (en) * 2005-11-10 2008-01-29 Magicground Technology Llc Ground testing method and apparatus
US10182833B2 (en) 2007-01-08 2019-01-22 Ekos Corporation Power parameters for ultrasonic catheter
ES2471118T3 (es) 2007-06-22 2014-06-25 Ekos Corporation Método y aparato para el tratamiento de hemorragias intracraneales
US8619443B2 (en) 2010-09-29 2013-12-31 The Powerwise Group, Inc. System and method to boost voltage
US8085009B2 (en) 2007-08-13 2011-12-27 The Powerwise Group, Inc. IGBT/FET-based energy savings device for reducing a predetermined amount of voltage using pulse width modulation
US8120307B2 (en) 2007-08-24 2012-02-21 The Powerwise Group, Inc. System and method for providing constant loading in AC power applications
US8085010B2 (en) 2007-08-24 2011-12-27 The Powerwise Group, Inc. TRIAC/SCR-based energy savings device for reducing a predetermined amount of voltage using pulse width modulation
US8810190B2 (en) 2007-09-14 2014-08-19 The Powerwise Group, Inc. Motor controller system and method for maximizing energy savings
US8698447B2 (en) 2007-09-14 2014-04-15 The Powerwise Group, Inc. Energy saving system and method for devices with rotating or reciprocating masses
US8004255B2 (en) 2008-08-07 2011-08-23 The Powerwise Group, Inc. Power supply for IGBT/FET drivers
US8698446B2 (en) 2009-09-08 2014-04-15 The Powerwise Group, Inc. Method to save energy for devices with rotating or reciprocating masses
BR112012005097A2 (pt) 2009-09-08 2016-05-03 Powerwise Group Inc sistema de economia de energia e método para dispositivos com massas de alternância ou rotatórias
US11458290B2 (en) 2011-05-11 2022-10-04 Ekos Corporation Ultrasound system
DE102011050590A1 (de) 2011-05-24 2012-11-29 Sma Solar Technology Ag Isolationsüberwachung mit einem Prüfsignal variabler Frequenz
JP5679054B2 (ja) * 2011-06-09 2015-03-04 トヨタ自動車株式会社 車両用給電設備
US9319101B2 (en) * 2012-09-28 2016-04-19 Siemens Industry, Inc. System and method for ground fault detection in a transformer isolated communication channel of a network device
EP2869075A1 (en) * 2013-11-04 2015-05-06 ABB Technology AG System and method for detecting a leakage from power cables of a DC bus to ground
TWI539169B (zh) * 2014-04-08 2016-06-21 Univ Kao Yuan High Sensitivity Non - grounded DC Power Supply Insulation Resistance Detection Method and Its Circuit
US10092742B2 (en) 2014-09-22 2018-10-09 Ekos Corporation Catheter system
JP6386970B2 (ja) * 2015-05-25 2018-09-05 アルプス電気株式会社 センサの異常検出装置及びセンサ装置
EP3307388B1 (en) 2015-06-10 2022-06-22 Ekos Corporation Ultrasound catheter
US10509063B2 (en) * 2017-11-28 2019-12-17 Fluke Corporation Electrical signal measurement device using reference signal
US10931223B2 (en) 2019-05-08 2021-02-23 Regal Beloit America, Inc. Circuit for detecting status of ground connection in an electric motor

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Publication number Priority date Publication date Assignee Title
US3579219A (en) * 1968-11-19 1971-05-18 Sola Basic Ind Inc Leakage-current detector
CA938674A (en) * 1970-12-22 1973-12-18 K. G. Stelter Manfred Ground fault detector
US3696366A (en) * 1971-03-22 1972-10-03 Edwards Co Ground detector system having fast response and decoupling of detector circuit
US3710238A (en) * 1971-04-27 1973-01-09 Sola Basic Ind Inc Sensitive sound fault meter and detector utilizing a double side band frequency current-generator
US3666993A (en) * 1971-05-13 1972-05-30 Electromagnetic Ind Inc Static hazard detector for isolated alternating current supply lines
US3668472A (en) * 1971-05-17 1972-06-06 Gilbert Associates Ground detection circuit for a d.c. distribution network
US3700966A (en) * 1971-05-19 1972-10-24 Paul Morrow Monitoring circuit for detecting leakage currents
US3737765A (en) * 1971-06-21 1973-06-05 Hubbell Inc Harvey Isolated power ground fault detector system
US3699392A (en) * 1971-11-22 1972-10-17 Joo C Lee Ground fault detection system with sequential line testing
CA948279A (en) * 1972-05-09 1974-05-28 Victor Beresnikow Dynamic ground detector
US3868665A (en) * 1974-02-08 1975-02-25 Midland Ross Corp Ground fault current detector

Also Published As

Publication number Publication date
ZA763055B (en) 1977-04-27
AU504535B2 (en) 1979-10-18
CA1052864A (en) 1979-04-17
US3976987A (en) 1976-08-24
FR2322378A1 (fr) 1977-03-25
AU1435676A (en) 1977-12-01
DE2630982B2 (de) 1978-07-27
DE2630982C3 (de) 1979-03-29
GB1552829A (en) 1979-09-19
FR2322378B1 (US06633600-20031014-M00021.png) 1982-07-30
DE2630982A1 (de) 1977-03-10

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