FI973520A0 - Method for identifying a single-phase earth fault in a three-phase network - Google Patents

Method for identifying a single-phase earth fault in a three-phase network

Info

Publication number
FI973520A0
FI973520A0 FI973520A FI973520A FI973520A0 FI 973520 A0 FI973520 A0 FI 973520A0 FI 973520 A FI973520 A FI 973520A FI 973520 A FI973520 A FI 973520A FI 973520 A0 FI973520 A0 FI 973520A0
Authority
FI
Finland
Prior art keywords
admittance
measurement values
moment
pair
earth
Prior art date
Application number
FI973520A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI973520A (en
Inventor
Gernot Druml
Klaus Papp
Original Assignee
Haefely Trench Austria Gmbh
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 Haefely Trench Austria Gmbh filed Critical Haefely Trench Austria Gmbh
Publication of FI973520A0 publication Critical patent/FI973520A0/en
Publication of FI973520A publication Critical patent/FI973520A/en

Links

Classifications

    • 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)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Locating Faults (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

A process is disclosed for recognising a unipolar earth leakage in an output line of three phase mains driven with an arc suppression coil for earthing by resonance the neutral point. The process has the following steps: (a) a first pair of measurement values (Uo1, Io1) is formed at a first moment in time (t1); (b) the displacement voltage is modified at a second moment in time (t2) and a second pair of measurement values (Uo2, Io2) is formed at the second moment in time (t2); (c) the output earth admittance (Ya) is determined from both pairs of measurement values (Uo1, Io1; Uo2, Io2), as well as an asymmetric admittance (Yu) as inner admittance of a voltage source that feeds the parallel oscillating circuit made up of the arc suppression coil and earth admittance (Ya), and the thus determined values (Ya, Yu) are stored as reference values; (d) a third pair of measurement values (Uo3, Io3) is formed at a third moment in time (t3); (e) a failure admittance (Yf) is determined from the third pair of measurement values (Uo3, Io3) as inner admittance of a voltage source that feeds a parallel oscillating circuit made up of the arc suppression coil, earth admittance (Ya) and asymmetric admittance (Yu) by using the stored reference values (Ya, Yu); and (f) an earth leakage is indicated when the failure admittance (Yf) exceeds a predetermined value (K1).
FI973520A 1995-02-28 1997-08-27 Method for identifying a single-phase earth fault in a three-phase network FI973520A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0036095A AT404072B (en) 1995-02-28 1995-02-28 METHOD FOR DETECTING A SINGLE-POLE EARTH FAULT IN A THREE-PHASE NETWORK
PCT/AT1996/000030 WO1996027138A1 (en) 1995-02-28 1996-02-27 Unipolar earth leakage recognition process for three phase mains

Publications (2)

Publication Number Publication Date
FI973520A0 true FI973520A0 (en) 1997-08-27
FI973520A FI973520A (en) 1997-08-27

Family

ID=3488545

Family Applications (1)

Application Number Title Priority Date Filing Date
FI973520A FI973520A (en) 1995-02-28 1997-08-27 Method for identifying a single-phase earth fault in a three-phase network

Country Status (7)

Country Link
EP (1) EP0812427B1 (en)
AT (2) AT404072B (en)
CZ (1) CZ284886B6 (en)
DE (1) DE59600871D1 (en)
FI (1) FI973520A (en)
HU (1) HUP9702155A3 (en)
WO (1) WO1996027138A1 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATA194698A (en) * 1998-11-20 2001-11-15 Adaptive Regelsysteme Ges M B METHOD FOR DETERMINING THE EARTHED BRANCH
FI112283B (en) * 1999-09-23 2003-11-14 Abb Oy Method for detecting large impedance ground fault in medium voltage grid
FR2810117B1 (en) * 2000-06-13 2002-08-23 Electricite De France RESISTANT DEFECT DETECTION METHOD
FI108894B (en) * 2000-09-22 2002-04-15 Abb Substation Automation Oy A method for detecting a faulty or faulty output or branch of a power grid, for example in a compensated network
DE10307972B4 (en) * 2003-02-24 2007-02-08 Edc Gmbh Method for detecting and locating low-resistance and high-impedance ground faults in electrical supply networks
US7327275B2 (en) 2004-02-02 2008-02-05 Gecko Alliance Group Inc. Bathing system controller having abnormal operational condition identification capabilities
ATE337557T1 (en) * 2004-05-18 2006-09-15 Trench Austria Gmbh METHOD FOR INDICATING A HIGH OHMIN EARTH FAULT IN A THREE-PHASE NETWORK
EP1870717B1 (en) * 2006-06-20 2014-01-08 ABB Technology AG System and method for determining phase-to-earth admittances of a three-phase electric line
PT2128951E (en) 2007-01-26 2015-07-10 Ormazabal Prot & Automation S L Electronic active earthing system for use in high-voltage distribution networks
AT503929B1 (en) * 2007-02-01 2008-02-15 Adaptive Regelsysteme Ges M B Auxiliary signal injecting device for electric distribution network, has electrical terminals connected to phase conductor and ground, respectively, where impedance and/or admittance of switching network is modified relative to terminals
CN103777103B (en) * 2014-02-18 2016-03-30 南京卓实电气有限责任公司 A kind of arc suppression coil state online test method and device
DE102020002618A1 (en) 2020-04-30 2021-11-04 A. Eberle Gmbh & Co. Kg Method for the detection and / or location of earth faults

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2711629C2 (en) * 1977-03-17 1978-12-07 Gossen Gmbh, 8520 Erlangen Method and circuit arrangement for locating permanent earth faults in three-phase networks
SE446678B (en) * 1981-11-02 1986-09-29 Asea Ab METHOD TO DETECT EARTH ERRORS IN NET FOR DISTRIBUTION OF ELECTRIC POWER AND DEVICE FOR IMPLEMENTATION OF THE METHOD
US4398232A (en) * 1981-11-13 1983-08-09 Westinghouse Electric Corp. Protective relaying methods and apparatus
DE3270183D1 (en) * 1981-12-22 1986-04-30 Zuerich Kanton Elektwerk Process and device to control at least one compensation coil in a polyphase network
DE3777757D1 (en) * 1986-11-10 1992-04-30 Siemens Ag METHOD AND DEVICE FOR LOCATING AN EARTH FAILURE OF A LADDER IN A THREE-PHASE NETWORK.
JP2576299B2 (en) * 1991-03-07 1997-01-29 株式会社日立製作所 Distribution line micro-ground fault detector
IE921252A1 (en) * 1991-04-19 1992-10-21 Elektro Bau Ag A method for determining an earth-shorted branch circuit in¹an electrical supply or distributor network

Also Published As

Publication number Publication date
WO1996027138A1 (en) 1996-09-06
ATE173833T1 (en) 1998-12-15
HUP9702155A2 (en) 1998-04-28
FI973520A (en) 1997-08-27
HUP9702155A3 (en) 2000-03-28
EP0812427B1 (en) 1998-11-25
CZ261597A3 (en) 1997-11-12
ATA36095A (en) 1997-12-15
AT404072B (en) 1998-08-25
CZ284886B6 (en) 1999-03-17
EP0812427A1 (en) 1997-12-17
DE59600871D1 (en) 1999-01-07

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Legal Events

Date Code Title Description
FD Application lapsed