GB0818653D0 - A current transformer - Google Patents

A current transformer

Info

Publication number
GB0818653D0
GB0818653D0 GBGB0818653.8A GB0818653A GB0818653D0 GB 0818653 D0 GB0818653 D0 GB 0818653D0 GB 0818653 A GB0818653 A GB 0818653A GB 0818653 D0 GB0818653 D0 GB 0818653D0
Authority
GB
United Kingdom
Prior art keywords
current transformer
transformer
current
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
GBGB0818653.8A
Other versions
GB2455847B (en
GB2455847A (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Atreus Enterprises Ltd
Original Assignee
Atreus Enterprises Ltd
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 Atreus Enterprises Ltd filed Critical Atreus Enterprises Ltd
Publication of GB0818653D0 publication Critical patent/GB0818653D0/en
Publication of GB2455847A publication Critical patent/GB2455847A/en
Application granted granted Critical
Publication of GB2455847B publication Critical patent/GB2455847B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • H01F27/366—Electric or magnetic shields or screens made of ferromagnetic material
    • 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
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • H01F27/365—
    • 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
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/10—Composite arrangements of magnetic circuits
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F30/00—Fixed transformers not covered by group H01F19/00
    • H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
    • H01F30/16—Toroidal transformers
GB0818653A 2007-12-19 2008-10-10 A curent transformer Expired - Fee Related GB2455847B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IE20070918A IES20070918A2 (en) 2007-12-19 2007-12-19 A current transformer

Publications (3)

Publication Number Publication Date
GB0818653D0 true GB0818653D0 (en) 2008-11-19
GB2455847A GB2455847A (en) 2009-06-24
GB2455847B GB2455847B (en) 2010-03-10

Family

ID=40083873

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0818653A Expired - Fee Related GB2455847B (en) 2007-12-19 2008-10-10 A curent transformer

Country Status (2)

Country Link
GB (1) GB2455847B (en)
IE (1) IES20070918A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2577826A2 (en) 2010-06-03 2013-04-10 Shakira Limited An arc fault detector for ac or dc installations
EP2592636A3 (en) * 2011-11-10 2013-10-23 Atreus Enterprises Limited A current transformer
ITMI20131736A1 (en) * 2013-10-17 2015-04-18 Abb Spa CURRENT TRANSFORMER FOR LOW VOLTAGE DIFFERENTIAL SWITCHES

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3665356A (en) * 1969-04-23 1972-05-23 Rucker Co Differential transformer with balancing means
SE366420B (en) * 1972-08-30 1974-04-22 Asea Ab
AT363549B (en) * 1980-01-18 1981-08-10 Felten & Guilleaume Ag Oester Fault current protection switch with summation current transformer
DK169008B1 (en) * 1990-06-01 1994-07-25 Holec Lk A S Method and screen for shielding a current transformer as well as current transformers with such shielding
JP2635255B2 (en) * 1991-11-26 1997-07-30 三菱電機株式会社 Zero-phase current detector
JPH06267396A (en) * 1993-03-16 1994-09-22 Hitachi Ltd Zero-phase current transformer
JP2862054B2 (en) * 1993-04-06 1999-02-24 三菱電機株式会社 Zero-phase current detector
JPH1022149A (en) * 1996-06-28 1998-01-23 Tokin Corp Zero-phase current transformer
US5828282A (en) * 1996-12-13 1998-10-27 General Electric Company Apparatus and method for shielding a toroidal current sensor

Also Published As

Publication number Publication date
IES20070918A2 (en) 2009-03-18
GB2455847B (en) 2010-03-10
GB2455847A (en) 2009-06-24

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20121010