FI964000A0 - Device for checking the insulation condition of AC wires or cables - Google Patents

Device for checking the insulation condition of AC wires or cables

Info

Publication number
FI964000A0
FI964000A0 FI964000A FI964000A FI964000A0 FI 964000 A0 FI964000 A0 FI 964000A0 FI 964000 A FI964000 A FI 964000A FI 964000 A FI964000 A FI 964000A FI 964000 A0 FI964000 A0 FI 964000A0
Authority
FI
Finland
Prior art keywords
inductance
current
cables
checking
test resistance
Prior art date
Application number
FI964000A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI964000A (en
Inventor
Jian Xie
Werner Ohrband
Original Assignee
Aeg Bahnfahrwegsysteme 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 Aeg Bahnfahrwegsysteme Gmbh filed Critical Aeg Bahnfahrwegsysteme Gmbh
Publication of FI964000A publication Critical patent/FI964000A/en
Publication of FI964000A0 publication Critical patent/FI964000A0/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)
  • Measurement Of Resistance Or Impedance (AREA)
  • Electric Cable Installation (AREA)
  • Cable Accessories (AREA)
  • Insulated Conductors (AREA)
  • Communication Cables (AREA)
  • Testing Relating To Insulation (AREA)

Abstract

The invention concerns a device for checking the insulation condition of alternating-current-carrying lines or cables, in particular overhead contact lines for railways, using an interposed electrical test resistance connected in series with the overhead line to limit the current and a voltage transformer connected to the other side of the test resistance to measure the voltage drop. In order to avoid the heating problems and high costs associated with the test resistances used in prior art devices, the invention proposes that an inductance (L1) be used as the current-limiting test resistance and that a compensation choke (L2) be connected, behind the inductance, between the overhead line and earth. In a preferred embodiment, the compensation inductance (L2) is designed to compensate or overcompensate for the line capacitance (C) in accordance with the relationship L2C </= 1.
FI964000A 1994-04-07 1996-10-04 Device for checking the insulation condition of AC wires or cables FI964000A0 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4412250A DE4412250C2 (en) 1994-04-07 1994-04-07 Route test facility for testing the insulation status of railway overhead lines connected to AC voltage
PCT/EP1995/001219 WO1995027904A1 (en) 1994-04-07 1995-04-01 Device for checking the insulation condition of alternating-current-carrying lines or cables

Publications (2)

Publication Number Publication Date
FI964000A FI964000A (en) 1996-10-04
FI964000A0 true FI964000A0 (en) 1996-10-04

Family

ID=6514987

Family Applications (1)

Application Number Title Priority Date Filing Date
FI964000A FI964000A0 (en) 1994-04-07 1996-10-04 Device for checking the insulation condition of AC wires or cables

Country Status (8)

Country Link
EP (1) EP0754304B1 (en)
AT (1) ATE161633T1 (en)
CZ (1) CZ288796A3 (en)
DE (2) DE4412250C2 (en)
FI (1) FI964000A0 (en)
HU (1) HU9602739D0 (en)
NO (1) NO964230L (en)
WO (1) WO1995027904A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114636860B (en) * 2022-02-15 2022-11-15 深圳市正浩创新科技股份有限公司 Method and device for verifying buffer resistor, terminal and storage medium

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
DE4128619A1 (en) * 1991-08-28 1993-03-04 Siemens Ag ARRANGEMENT FOR THE QUICK DETECTION OF SHORT CIRCUITS
DE4204911A1 (en) * 1992-02-14 1993-08-19 Elpro Ag Line section test equipment for railway electric power supply system
EP0555946B1 (en) * 1992-02-14 1998-12-09 Elpro BahnstromAnlagen GmbH Line testing device for traction current systems, especially standard gauge railway systems
DE4303739C2 (en) * 1992-02-14 1996-04-11 Elpro Ag Line test facility for railway power systems, in particular full railway systems

Also Published As

Publication number Publication date
NO964230D0 (en) 1996-10-04
DE4412250A1 (en) 1995-10-12
WO1995027904A1 (en) 1995-10-19
EP0754304A1 (en) 1997-01-22
HU9602739D0 (en) 1996-11-28
CZ288796A3 (en) 1997-01-15
NO964230L (en) 1996-10-04
FI964000A (en) 1996-10-04
DE4412250C2 (en) 1997-04-24
DE59501180D1 (en) 1998-02-05
EP0754304B1 (en) 1997-12-29
ATE161633T1 (en) 1998-01-15

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