DK0635922T3 - High-sensitivity fault current detection device - Google Patents

High-sensitivity fault current detection device

Info

Publication number
DK0635922T3
DK0635922T3 DK94109026.8T DK94109026T DK0635922T3 DK 0635922 T3 DK0635922 T3 DK 0635922T3 DK 94109026 T DK94109026 T DK 94109026T DK 0635922 T3 DK0635922 T3 DK 0635922T3
Authority
DK
Denmark
Prior art keywords
annular
fault current
field coil
detection device
current detection
Prior art date
Application number
DK94109026.8T
Other languages
Danish (da)
Inventor
Fritz Pohl
Original Assignee
Siemens Ag
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 Siemens Ag filed Critical Siemens Ag
Application granted granted Critical
Publication of DK0635922T3 publication Critical patent/DK0635922T3/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/20—Instruments transformers
    • H01F38/40—Instruments transformers for dc
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
    • H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
    • H02H3/33—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers
    • H02H3/332—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers with means responsive to dc component in the fault current
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/20—Instruments transformers
    • H01F38/22—Instruments transformers for single phase ac
    • H01F38/28—Current transformers
    • H01F38/30—Constructions
    • H01F2038/305—Constructions with toroidal magnetic core

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
  • Transformers For Measuring Instruments (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Protection Of Static Devices (AREA)

Abstract

It has been found according to the invention that the arrangement of at least one annular ribbon core (10, 10') as a summing current transformer, and a field coil (20) in the form of a flat annular coil leads to particularly favourable results, the axes (I) of the annular ribbon core (10, 10') and of the field coil (20) running approximately in a colinear manner. In this case, the annular planes (12, 22) of the annular ribbon core (10, 10') and field coil (20) are in close contact with one another. In the case of such an arrangement, a release sensitivity of approximately one mA DC fault current can be achieved, with the transformer having an internal diameter of, for example, 10 mm. <IMAGE>
DK94109026.8T 1993-06-25 1994-06-13 High-sensitivity fault current detection device DK0635922T3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4321232 1993-06-25

Publications (1)

Publication Number Publication Date
DK0635922T3 true DK0635922T3 (en) 1997-09-15

Family

ID=6491266

Family Applications (1)

Application Number Title Priority Date Filing Date
DK94109026.8T DK0635922T3 (en) 1993-06-25 1994-06-13 High-sensitivity fault current detection device

Country Status (5)

Country Link
EP (1) EP0635922B1 (en)
AT (1) ATE149755T1 (en)
DE (1) DE59401885D1 (en)
DK (1) DK0635922T3 (en)
ES (1) ES2098821T3 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4425904A1 (en) * 1994-07-21 1996-01-25 Vacuumschmelze Gmbh Magnetic displacement sensor
EP0984478A1 (en) * 1998-08-31 2000-03-08 Siemens Aktiengesellschaft Converting material for leak current protectors and its application
CN116741508B (en) * 2023-08-14 2023-10-20 江苏靖江互感器股份有限公司 Coil connecting device, current coil and manufacturing method thereof

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1056735B (en) * 1957-11-23 1959-05-06 Licentia Gmbh Shield for direct current converter
DE1538122A1 (en) * 1965-12-02 1969-04-10 Siemens Ag Window current transformer
US4021729A (en) * 1975-12-03 1977-05-03 I-T-E Imperial Corporation Cross-field ground fault sensor
US4280162A (en) * 1977-08-04 1981-07-21 North American Philips Corporation Ground fault circuit interrupter
LU78600A1 (en) * 1977-11-28 1979-06-13 Gath N Fault current protection switch
GB2102212B (en) * 1981-07-20 1984-11-21 Telcon Metals Ltd Magnetic core strctures, devices incorporating them, and magnetic biassing methods
US5110378A (en) * 1988-08-17 1992-05-05 Allied-Signal Inc. Metallic glasses having a combination of high permeability, low coercivity, low ac core loss, low exciting power and high thermal stability
DE3911480A1 (en) * 1989-04-08 1990-10-11 Vacuumschmelze Gmbh USE OF A FINE CRYSTALLINE IRON BASE ALLOY AS A MAGNETIC MATERIAL FOR FAULT CURRENT CIRCUIT BREAKERS

Also Published As

Publication number Publication date
EP0635922A1 (en) 1995-01-25
EP0635922B1 (en) 1997-03-05
DE59401885D1 (en) 1997-04-10
ES2098821T3 (en) 1997-05-01
ATE149755T1 (en) 1997-03-15

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