NO960621L - Device for registering stator ground connections on three-phase machines - Google Patents

Device for registering stator ground connections on three-phase machines

Info

Publication number
NO960621L
NO960621L NO960621A NO960621A NO960621L NO 960621 L NO960621 L NO 960621L NO 960621 A NO960621 A NO 960621A NO 960621 A NO960621 A NO 960621A NO 960621 L NO960621 L NO 960621L
Authority
NO
Norway
Prior art keywords
phase current
earth leakage
transformer
voltage
harmonic
Prior art date
Application number
NO960621A
Other languages
Norwegian (no)
Other versions
NO960621D0 (en
Inventor
Jorg Strobl
Original Assignee
Elin Energieversorgung
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 Elin Energieversorgung filed Critical Elin Energieversorgung
Publication of NO960621L publication Critical patent/NO960621L/en
Publication of NO960621D0 publication Critical patent/NO960621D0/en

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
    • H02H7/0805—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors for synchronous motors
    • 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
    • G01R31/34—Testing dynamo-electric machines
    • G01R31/343—Testing dynamo-electric machines in operation
    • 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
    • G01R31/34—Testing dynamo-electric machines
    • G01R31/346—Testing of armature or field windings

Landscapes

  • Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
  • Synchronous Machinery (AREA)
  • Control Of Ac Motors In General (AREA)
  • Protection Of Generators And Motors (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Motorcycle And Bicycle Frame (AREA)
  • Control Of Turbines (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Control Of Multiple Motors (AREA)

Abstract

In a stator earth leakage detection process, clear differences in the third harmonic in the faultless and in the earth leaking state may be ascertained but the parasitic current is nevertheless shunted and the vibrations is dampened. For that purpose, a three-phase current transformer (2) is connected to the terminals of a three-phase current machine (1), for example a synchronous generator. The three-phase current transformer (2) must have a free magnetic short-circuit in order to transmit a null voltage in the event of an earth leakage of the three-phase current motor (1). The primary winding of the transformer (2) is star connected with an earthed star point. The secondary winding of the transformer (2) is connected so as to form an open triangle and is loaded with the resistance (4) which may be switched off by the switch (5) connected in series. A voltage converter (6) is connected to the earthed star point of the three-phase current machine (1). The secondary voltage of said converter (6) and the voltage at the open triangle winding are supplied to a static earth leakage relay (7) that detects an earth leakage in the generator (1) on the basis of the amplitude and phase position of the third harmonic in said voltages.
NO960621A 1993-08-19 1996-02-16 Device for registering stator ground connections on three-phase machines NO960621D0 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0166393A AT401443B (en) 1993-08-19 1993-08-19 ARRANGEMENT FOR DETECTING STANDSTAND LOCKS IN THREE-PHASE MACHINES
PCT/AT1994/000114 WO1995005695A1 (en) 1993-08-19 1994-08-12 Arrangement for detecting stator earth leakages in three-phase current machines

Publications (2)

Publication Number Publication Date
NO960621L true NO960621L (en) 1996-02-16
NO960621D0 NO960621D0 (en) 1996-02-16

Family

ID=3518301

Family Applications (1)

Application Number Title Priority Date Filing Date
NO960621A NO960621D0 (en) 1993-08-19 1996-02-16 Device for registering stator ground connections on three-phase machines

Country Status (9)

Country Link
EP (1) EP0714565B1 (en)
CN (1) CN1037047C (en)
AT (2) AT401443B (en)
CZ (1) CZ284685B6 (en)
DE (1) DE59402771D1 (en)
FI (1) FI960732A (en)
NO (1) NO960621D0 (en)
SK (1) SK279599B6 (en)
WO (1) WO1995005695A1 (en)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1027612A1 (en) * 1997-10-27 2000-08-16 Siemens Aktiengesellschaft Method and measuring unit for verifying the presence of a neutral conductor connection between a four wire system and a measuring unit
DE10204489B4 (en) * 2002-01-30 2006-01-05 Demag Cranes & Components Gmbh Drive for a hoist with a three-phase three-phase motor having three motor windings
CN100438249C (en) * 2002-12-05 2008-11-26 上海交通大学 Selective generator stator single phase grounding protective method
CN100373729C (en) * 2005-01-14 2008-03-05 北京四方继保自动化股份有限公司 Stator grounding protection with combined third harmonic dynamic alignment criterion and voltage ratio criterion
EP1890369B1 (en) * 2006-08-18 2013-10-02 ABB Research Ltd Ground fault detection
CN101383503B (en) * 2007-09-03 2011-06-22 深圳市汇川技术股份有限公司 System and method for detecting short circuit to ground of motor
WO2012010193A1 (en) * 2010-07-19 2012-01-26 Abb Technology Ag Device and method for detecting a ground fault
CN102169749B (en) * 2011-01-26 2013-02-13 中电电气(江苏)股份有限公司 Low-zero-sequence-resistance slow-harmonic energy-saving transformer
CN103403564B (en) * 2011-03-03 2015-08-12 Abb研究有限公司 For the method for adaptation of ground fault detection
DE102012022139A1 (en) * 2011-12-06 2013-06-06 Heidelberger Druckmaschinen Ag Simplified electrical braking device
CN102692583B (en) * 2012-06-19 2014-06-11 国电大渡河检修安装有限公司 Finding method of multi-branch-circuit power generator stator winding grounded short circuit point
CN103532097B (en) * 2012-07-05 2016-12-21 中国石油天然气集团公司 A kind of mobile generator earth leakage protective device
CN103575936B (en) * 2012-07-30 2016-04-13 广西玉柴机器股份有限公司 Stator Winding detects stand
CN103439656B (en) * 2013-06-27 2015-11-18 广东电网公司电力科学研究院 The generator unit stator winding flowed to based on fault current and electrically major loop ground method for diagnosing faults
ES2454045B2 (en) * 2013-12-18 2015-03-23 Universidad Politécnica de Madrid System and method for locating earth defects in static windings of synchronous machines grounded by high value impedance.
CN105486974B (en) * 2015-12-31 2019-02-19 北京合康新能科技股份有限公司 Detect the circuit and method of the stator winding end ground connection of motor
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 (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH488305A (en) * 1968-09-03 1970-03-31 Bbc Brown Boveri & Cie Earth-fault protection device for three-phase generators using the third harmonics generated in the generator
US5305234A (en) * 1991-12-31 1994-04-19 Westinghouse Electric Corp. Thermal protection apparatus for a synchronous machine

Also Published As

Publication number Publication date
AT401443B (en) 1996-09-25
CZ284685B6 (en) 1999-02-17
CN1037047C (en) 1998-01-14
CN1129495A (en) 1996-08-21
CZ35296A3 (en) 1996-05-15
EP0714565B1 (en) 1997-05-14
WO1995005695A1 (en) 1995-02-23
FI960732A0 (en) 1996-02-16
FI960732A (en) 1996-02-16
SK279599B6 (en) 1999-01-11
EP0714565A1 (en) 1996-06-05
ATA166393A (en) 1996-01-15
SK19896A3 (en) 1996-08-07
NO960621D0 (en) 1996-02-16
DE59402771D1 (en) 1997-06-19
ATE153190T1 (en) 1997-05-15

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Legal Events

Date Code Title Description
FC2A Withdrawal, rejection or dismissal of laid open patent application