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)
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 (it)
AU (1) AU504535B2 (it)
CA (1) CA1052864A (it)
DE (1) DE2630982C3 (it)
FR (1) FR2322378A1 (it)
GB (1) GB1552829A (it)
IT (1) IT1071198B (it)
ZA (1) ZA763055B (it)

Families Citing this family (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US5450328A (en) * 1994-03-21 1995-09-12 Square D Company System for measuring line to ground impedance
US5448491A (en) * 1994-03-21 1995-09-05 Square D Company Monitor for an ungrounded system
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
US6646837B2 (en) 2000-11-06 2003-11-11 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
AU2002359576A1 (en) * 2001-12-03 2003-06-17 Ekos Corporation Catheter with multiple ultrasound radiating members
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
PL2170181T3 (pl) 2007-06-22 2014-08-29 Ekos Corp Sposób i aparat do leczenia wylewów wewnątrzczaszkowych
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
MX2012003008A (es) 2009-09-08 2012-04-19 Powerwise Group Inc Sistema y metodo para ahorrar energia para dispositivos con masas rotatorias o alternativas.
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
CN103597702B (zh) * 2011-06-09 2016-03-02 丰田自动车株式会社 车辆用供电设备
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
CN107708581B (zh) 2015-06-10 2021-11-19 Ekos公司 超声波导管
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

Family Cites Families (11)

* Cited by examiner, † Cited by third party
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
FR2322378B1 (it) 1982-07-30
DE2630982C3 (de) 1979-03-29
CA1052864A (en) 1979-04-17
ZA763055B (en) 1977-04-27
AU504535B2 (en) 1979-10-18
AU1435676A (en) 1977-12-01
US3976987A (en) 1976-08-24
GB1552829A (en) 1979-09-19
DE2630982A1 (de) 1977-03-10
FR2322378A1 (fr) 1977-03-25
DE2630982B2 (de) 1978-07-27

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