DK0654673T3 - Method and Device for Isolation Monitoring of Ungrounded DC and AC Networks - Google Patents

Method and Device for Isolation Monitoring of Ungrounded DC and AC Networks

Info

Publication number
DK0654673T3
DK0654673T3 DK94118162T DK94118162T DK0654673T3 DK 0654673 T3 DK0654673 T3 DK 0654673T3 DK 94118162 T DK94118162 T DK 94118162T DK 94118162 T DK94118162 T DK 94118162T DK 0654673 T3 DK0654673 T3 DK 0654673T3
Authority
DK
Denmark
Prior art keywords
network
measurement
measured
pulse voltage
earth
Prior art date
Application number
DK94118162T
Other languages
Danish (da)
Inventor
Karl Schepp
Original Assignee
Walther Bender Gmbh & Co Kg Di
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 Walther Bender Gmbh & Co Kg Di filed Critical Walther Bender Gmbh & Co Kg Di
Application granted granted Critical
Publication of DK0654673T3 publication Critical patent/DK0654673T3/en

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
    • 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
    • G01R27/025—Measuring very high resistances, e.g. isolation resistances, i.e. megohm-meters
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Air Bags (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Abstract

The invention relates to a method for insulation monitoring of unearthed electrical DC networks (mains) and AC networks having an unavoidable ohmic and capacitive insulation impedance between network and earth, in particular such networks with connected rectifiers or other current converters. This method includes a AC pulse voltage which has alternately different pulse voltage values and is applied as measurement voltage via an ohmic network coupling between network and earth to the network to be monitored. The measurement current flowing between network and earth for each pulse voltage value of the transient oscillation of the network at this pulse voltage value, which current is dependent on the magnitude of the insulation impedance between the network and earth and on the pulse voltage value, is detected directly or indirectly as measured-current measured-value, and the measurement-value difference between two sequential measured-current measured-values is used to determine the ohmic insulation impedance between network and earth. In this case it is proposed according to the invention, in order to reduce the measurement times, to observe for each pulse voltage value of the measurement voltage the time response of the instantaneous-network-dependent transient oscillation process of the measurement current, or a quantity such as a voltage derived therefrom, until reaching the transient oscillation state, and to detect the associated measured-current measured-values directly after reaching the transient oscillation states and to switch over the respective pulse voltage value of the AC pulse voltage immediately to its next pulse voltage value. The invention furthermore relates to a device suitable for carrying out this method, with an AC pulse voltage source (20) which generates a measurement pulse and can be connected via an ohmic measurement resistor (Rm; 22) and an ohmic network coupling (24) between an unearthed electrical network (12) to be monitored and earth (E), and further having an evaluation unit which is connected to the measurement resistor and detects the measured-current measured-value (Um1, Um2) occurring respectively at the end of the transient oscillation process of one of each of the measurement pulses at the measurement resistor and it determines the ohmic insulation impedance (Re) between the network to be monitored and earth from the measured-value difference (Um1-Um2) of two sequential measured-current measured-values respectively. In this case it is proposed, according to the invention, for the AC pulse voltage source to be designed as a switchable voltage source (20) which can in each case generate one of a plurality, in particular two, different DC voltage values as a function of a control signal (S; 36), and for the evaluation unit (28, 34) to be designed such that it detects the electrical transient oscillation process from a DC voltage value across the measurement resistor (Rm; 22) and switches the switchable voltage source to the other DC voltage value at the end of each transient oscillation process.
DK94118162T 1993-11-24 1994-11-18 Method and Device for Isolation Monitoring of Ungrounded DC and AC Networks DK0654673T3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4339946A DE4339946A1 (en) 1993-11-24 1993-11-24 Method and device for monitoring the insulation of unearthed direct and alternating current networks

Publications (1)

Publication Number Publication Date
DK0654673T3 true DK0654673T3 (en) 2002-11-04

Family

ID=6503264

Family Applications (1)

Application Number Title Priority Date Filing Date
DK94118162T DK0654673T3 (en) 1993-11-24 1994-11-18 Method and Device for Isolation Monitoring of Ungrounded DC and AC Networks

Country Status (6)

Country Link
EP (1) EP0654673B1 (en)
AT (1) ATE220462T1 (en)
DE (2) DE4339946A1 (en)
DK (1) DK0654673T3 (en)
ES (1) ES2179834T3 (en)
PT (1) PT654673E (en)

Families Citing this family (48)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10106200C1 (en) * 2001-02-10 2002-09-05 Ean Elektroschaltanlagen Gmbh Insulation monitoring method for unearthed electrical network uses pulses AC voltage applied between network and earth and evaluation of measured current values
DE10205381A1 (en) * 2002-02-09 2003-08-21 Ballard Power Systems Monitoring insulation of direct current network, with measurement resistance galvanically separated from resistance measurement device to suppress interference effects
DE10212493A1 (en) 2002-03-21 2003-10-02 Ballard Power Systems Arrangement for monitoring insulation of equipment of DC system isolated from earth has dual insulation monitoring devices operating alternately
DE10304234A1 (en) * 2003-01-28 2004-08-05 Volkswagen Ag Insulation resistance measuring device, for electrical power system of e.g. electric or hybrid vehicle, has two measurement resistances between traction battery poles connected to main power supply
CN100401079C (en) * 2004-04-14 2008-07-09 山东大学 Single phase earthing wire selection method for small earthing current system
DK1586910T3 (en) * 2004-04-18 2009-04-06 Deif As Method and device for insulation monitoring
JP4789717B2 (en) * 2006-07-03 2011-10-12 阪和電子工業株式会社 Method for measuring characteristic impedance of electrostatic discharge protection circuit and apparatus for realizing the measurement.
JP4241787B2 (en) * 2006-09-06 2009-03-18 日立ビークルエナジー株式会社 Total battery voltage detection and leak detection device
EP1909369B1 (en) 2006-10-06 2020-05-20 Schmidhauser AG Switching assembly and method for insulation monitoring for converter applications in operation
US20090323233A1 (en) 2008-06-26 2009-12-31 Shoemaker Jim M Apparatus and method of determining insulation resistance in an ungrounded mobile vehicle electrical bus system
DE102009048294A1 (en) 2009-05-19 2011-01-13 Abb Ag Method and device for monitoring the insulation of unearthed electrical DC and AC networks
EP2256506B1 (en) 2009-05-27 2019-07-03 Bender GmbH & Co. KG Method and device for insulation monitoring of unearthed direct voltage and alternating current networks
DE102010030475A1 (en) 2010-06-24 2012-01-19 Robert Bosch Gmbh Method and device for determining the insulation resistance of an ungrounded electrical network
DE102010039692A1 (en) * 2010-08-24 2012-03-01 Dipl.-Ing. Walther Bender Gmbh & Co. Kg Apparatus for monitoring the insulation of a non-grounded direct voltage network, in particular a photovoltaic system, and installation with such a device
DE102010042394B4 (en) * 2010-10-13 2022-02-03 Vitesco Technologies GmbH Method and circuit arrangement for checking electrical insulation
ES2390148B1 (en) * 2010-12-17 2013-08-08 Zigor Corporacion, S. A. PROCEDURE AND DEVICE FOR MEASURING THE ELECTRICAL INSULATION RESISTANCE OF A CONTINUOUS VOLTAGE SOURCE.
DE102011050590A1 (en) 2011-05-24 2012-11-29 Sma Solar Technology Ag Insulation monitoring with a test signal of variable frequency
FR2976083A1 (en) * 2011-06-01 2012-12-07 Commissariat Energie Atomique Device for detecting insulation fault in e.g. lithium ion phosphate battery of motorization system of electric vehicle, has control circuit for simultaneously maintaining one of two switches in open state and other switch in closed state
JP6038899B2 (en) 2011-06-01 2016-12-07 コミサリア ア レネルジ アトミク エ オウ エネルジ アルタナティヴ Power supply
EP2570289B1 (en) 2011-09-16 2018-08-15 Samsung SDI Co., Ltd. Device for determining the insulation resistance of a high-voltage battery system
DE102012208111C5 (en) * 2012-05-15 2016-05-12 Bender Gmbh & Co. Kg Pulse generator circuit arrangement and method for generating pulse signals for insulation fault location in IT networks
DE102012209586A1 (en) 2012-06-06 2013-12-12 Bender Gmbh & Co. Kg Insulation fault monitoring with signal quality indicator
DE102012019095B4 (en) * 2012-09-27 2016-07-21 E. Dold & Söhne KG Device for monitoring insulation resistance of networks
CN103063950B (en) * 2012-12-19 2015-05-20 华中科技大学 Test method for electrical properties of memristor component unit
GB201302938D0 (en) * 2013-02-20 2013-04-03 Viper Subsea Technology Ltd Rejuvination of subsea electrical cable insulation
US10199810B2 (en) 2013-02-20 2019-02-05 Viper Innovations Ltd Rejuvenation of subsea electrical cable insulation
EP2796886B1 (en) 2013-04-23 2017-09-06 Technische Universität Graz Circuit assembly for locating of insulation faults
DE102013013950B4 (en) * 2013-08-21 2020-08-06 Audi Ag Method, measuring arrangement and measuring device for determining insulation resistance of single cells of a high-voltage battery
RU2666803C1 (en) 2013-12-13 2018-09-12 Инфовэа Зрт. Method for measuring insulation resistance of ungrounded dc power network and for localizing earth fault, and current injecting two-pole device
DE102014200288A1 (en) 2014-01-10 2015-07-16 Bender Gmbh & Co. Kg Method and device for insulation monitoring with alarm diagnosis display
CN103884930B (en) * 2014-03-04 2016-06-22 王金全 A kind of full-bridge uncontrollable rectifier device method for diagnosing faults based on insulating monitoring
DE102014205877B4 (en) 2014-03-28 2019-08-22 Continental Automotive Gmbh Device and method for monitoring electrical insulation in a vehicle electrical system
DE102014016245A1 (en) 2014-11-04 2015-06-11 Daimler Ag A method for performing an insulation test on an electrical system of an electrically driven vehicle
DE102015102310B4 (en) * 2015-02-18 2017-05-11 Sma Solar Technology Ag Device for insulation resistance determination on a PV generator and photovoltaic system
EP3109647B1 (en) 2015-06-26 2020-11-18 MARICI Holdings The Netherlands B.V. Method and arrangement for measuring insulation resistance of photovoltaic system
DE102015016000A1 (en) 2015-12-10 2016-08-11 Daimler Ag Circuit arrangement for a motor vehicle and method for discharging Y capacities in vehicles with high-voltage on-board electrical system
CN107219404B (en) * 2016-03-21 2020-11-10 华为技术有限公司 Frequency adjusting method and device
EP3361270B1 (en) * 2017-02-09 2019-06-26 ABB Schweiz AG Method and device for fast insulation monitoring of electrical devices having large ground capacitance
DE102017209663B3 (en) * 2017-06-08 2018-10-18 Bender Gmbh & Co. Kg Method for insulation fault location and insulation fault location device for an ungrounded power supply system
EP3546957A1 (en) 2018-03-28 2019-10-02 Siemens Healthcare GmbH Isolated grounding effectiveness monitor
US11892495B2 (en) 2019-11-28 2024-02-06 Ls Electric Co., Ltd. Insulation monitoring device and control method therefor
AT523526B1 (en) 2020-04-10 2021-09-15 Seibt Kristl & Co Gmbh Method, device and system for determining a capacitance value of a grounding capacitance of an ungrounded power network
FR3109222B1 (en) 2020-04-14 2023-06-16 Renault Sas Method for detecting an electrical insulation fault between a source of electrical energy and an electrical mass
CN111426882A (en) * 2020-05-13 2020-07-17 常熟瑞特电气股份有限公司 RIM type insulation monitoring system
DE102020120433B3 (en) 2020-08-03 2021-10-28 Bender Gmbh & Co. Kg Sensor for an on-board electrical system
DE102021203919A1 (en) 2021-04-20 2022-10-20 Vitesco Technologies GmbH Insulation monitor for detecting an insulation fault in an electrical insulation of an electrical system
DE102022100846A1 (en) 2022-01-14 2023-07-20 Preh Gmbh Method and device for charging a high-voltage battery
DE102023102653A1 (en) 2023-02-03 2024-08-08 Schaeffler Technologies AG & Co. KG Insulation monitoring for high-voltage networks in electric vehicles

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2357081C3 (en) * 1973-11-15 1979-09-13 Gerd Dr.-Ing. 3167 Burgdorf Harms Method and device for measuring the insulation resistance of ungrounded direct current networks
CH579840A5 (en) * 1974-11-14 1976-09-15 Bbc Brown Boveri & Cie
DE2509661C2 (en) * 1975-03-06 1983-09-08 Gerd Dr.-Ing. 3167 Burgdorf Harms Device for measuring the insulation resistance of unearthed direct current networks
DE2545315B2 (en) * 1975-10-09 1977-11-03 Siemens AG, 1000 Berlin und 8000 München CIRCUIT ARRANGEMENT FOR EARTH FAULT MONITORING OF EARTH-FREE DC CIRCUIT
DE2545325C3 (en) * 1975-10-09 1979-03-22 Siemens Ag, 1000 Berlin Und 8000 Muenchen Circuit arrangement for measuring the insulation resistance of floating power circuits
DE2618303A1 (en) * 1976-04-27 1977-11-17 Bureaux De Const De Relais Ele Measurement of leakage resistant of polyphase network - using DC bridge with two arms consisting of insulation resistances
DE2717158A1 (en) * 1977-04-19 1978-11-02 Bureaux De Const De Relais Ele Multiple phase network insulation resistance determination - involves pulse generator and filtering detection circuit
DE3346387C2 (en) * 1983-12-22 1987-04-30 Standard Elektrik Lorenz Ag, 7000 Stuttgart Circuit arrangement for earth or frame fault monitoring
SU1323983A1 (en) * 1986-01-23 1987-07-15 Войсковая часть 27177 Device for measuring insulation resistance of direct current electric circuits

Also Published As

Publication number Publication date
EP0654673B1 (en) 2002-07-10
DE4339946A1 (en) 1995-06-01
ES2179834T3 (en) 2003-02-01
EP0654673A1 (en) 1995-05-24
DE59410152D1 (en) 2002-08-14
PT654673E (en) 2002-11-29
ATE220462T1 (en) 2002-07-15

Similar Documents

Publication Publication Date Title
DK0654673T3 (en) Method and Device for Isolation Monitoring of Ungrounded DC and AC Networks
CA2129002C (en) Near-end communications line characteristic measuring system
CA2151094A1 (en) Cable Monitoring System with Multiple Branch Terminations
CA1261389A (en) Monitoring device for detecting faults in an electrical device
CA2708067A1 (en) Method and apparatus for detecting a fault in a neutral return line of an electrical network
KR960016043A (en) Ground fault detection device and method for detecting ground fault current of the excitation circuit from ground and detecting ground winding of AC excitation variable speed rotor and ground fault of excitation circuit
EP1191343A3 (en) Method and apparatus for fault detection in a resistive bridge sensor
IT8322192A1 (en) LOAD DRIVING CIRCUIT WITH LOAD CURRENT DETECTION
EP0901264B1 (en) Telecommunications line termination test
WO2018004442A1 (en) System for analyzing high voltage circuit breakers
CN101345408A (en) Method for assigning a residual current to one of the three phase currents of a three-phase system and residual current protection switch
JPS589528A (en) Ac motor protecting device
SU1432420A1 (en) Device for checking insulation resistance
US4605827A (en) Line fault discriminator
SU1444624A1 (en) Device for multipoint measurement of temperature
SU1737383A1 (en) Method of determining short-circuit to earth in the remote telemetry power supply
RU2140670C1 (en) Alarm unit
JPH0618606A (en) Method for generating alarm for insulation deterioration
SU1767602A1 (en) Method of protective switching off of two-wire direct current mains when touched by man
SU879760A1 (en) Method and device for comparing electric signals
SU868651A1 (en) Device for determining earthing location in dc power network
SU1071964A1 (en) Device for checking resistance
SU1189809A1 (en) Megohmmeter with digital output
SU1758881A1 (en) Ground-fault detection method for remote supply circuit of transmission system telemechanics
SU440666A1 (en) Switch Control Device