WO1995024050A3 - Current transformer for a bar-type conductor - Google Patents

Current transformer for a bar-type conductor Download PDF

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Publication number
WO1995024050A3
WO1995024050A3 PCT/DE1995/000238 DE9500238W WO9524050A3 WO 1995024050 A3 WO1995024050 A3 WO 1995024050A3 DE 9500238 W DE9500238 W DE 9500238W WO 9524050 A3 WO9524050 A3 WO 9524050A3
Authority
WO
WIPO (PCT)
Prior art keywords
current transformer
section
magnetic circuit
cross
bar
Prior art date
Application number
PCT/DE1995/000238
Other languages
German (de)
French (fr)
Other versions
WO1995024050A2 (en
Inventor
Henry Frank
Peter Bohnen
Original Assignee
Siemens Ag
Henry Frank
Peter Bohnen
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, Henry Frank, Peter Bohnen filed Critical Siemens Ag
Publication of WO1995024050A2 publication Critical patent/WO1995024050A2/en
Publication of WO1995024050A3 publication Critical patent/WO1995024050A3/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
    • H01F38/22—Instruments transformers for single phase ac
    • H01F38/28—Current transformers
    • H01F38/30—Constructions
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H01F27/245—Magnetic cores made from sheets, e.g. grain-oriented

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transformers For Measuring Instruments (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)

Abstract

A current transformer (1) is used for detecting the current flowing in a bar-type conductor (7) and comprises a rectangular magnetic circuit (2) and two coil formers (4) disposed on opposite sides of the magnetic circuit (2) for the secondary winding (5). Inside the coil formers (4), the magnetic circuit (2) has a smaller cross-section (Q1) than in the area between the coil formers (4) where the cross-section is increased to a larger cross-section (Q2) by additional yoke members (13). Compared with a current transformer whose magnetic circuit has a cross-section which is constantly identical, the current transformer (1) described is characterised by fewer ohmic losses and improved linearity.
PCT/DE1995/000238 1994-03-02 1995-02-17 Current transformer for a bar-type conductor WO1995024050A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4407335 1994-03-02
DEP4407335.6 1994-03-02

Publications (2)

Publication Number Publication Date
WO1995024050A2 WO1995024050A2 (en) 1995-09-08
WO1995024050A3 true WO1995024050A3 (en) 1995-09-28

Family

ID=6511930

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1995/000238 WO1995024050A2 (en) 1994-03-02 1995-02-17 Current transformer for a bar-type conductor

Country Status (1)

Country Link
WO (1) WO1995024050A2 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2047007A (en) * 1979-04-10 1980-11-19 Philips Nv C-core transformer
JPS61102713A (en) * 1984-10-26 1986-05-21 Toshiba Corp Current transformer
EP0196992A1 (en) * 1985-03-06 1986-10-08 Siemens Aktiengesellschaft Current transformer having a rectangular magnetic core
WO1991015862A1 (en) * 1990-04-09 1991-10-17 Mojzesz Zylberszac Soft magnetic core in a closed electromagnetic circuit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2047007A (en) * 1979-04-10 1980-11-19 Philips Nv C-core transformer
JPS61102713A (en) * 1984-10-26 1986-05-21 Toshiba Corp Current transformer
EP0196992A1 (en) * 1985-03-06 1986-10-08 Siemens Aktiengesellschaft Current transformer having a rectangular magnetic core
WO1991015862A1 (en) * 1990-04-09 1991-10-17 Mojzesz Zylberszac Soft magnetic core in a closed electromagnetic circuit

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 010, no. 283 (E - 440) 26 September 1986 (1986-09-26) *

Also Published As

Publication number Publication date
WO1995024050A2 (en) 1995-09-08

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122 Ep: pct application non-entry in european phase