JPS6417414A - Current transformer - Google Patents

Current transformer

Info

Publication number
JPS6417414A
JPS6417414A JP62172287A JP17228787A JPS6417414A JP S6417414 A JPS6417414 A JP S6417414A JP 62172287 A JP62172287 A JP 62172287A JP 17228787 A JP17228787 A JP 17228787A JP S6417414 A JPS6417414 A JP S6417414A
Authority
JP
Japan
Prior art keywords
core
shield
magnetic
blocks
eddy 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.)
Pending
Application number
JP62172287A
Other languages
Japanese (ja)
Inventor
Kenji Endo
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.)
Fuji Electric Co Ltd
Original Assignee
Fuji Electric Co 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 Fuji Electric Co Ltd filed Critical Fuji Electric Co Ltd
Priority to JP62172287A priority Critical patent/JPS6417414A/en
Publication of JPS6417414A publication Critical patent/JPS6417414A/en
Pending legal-status Critical Current

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
    • H01F2038/305—Constructions with toroidal magnetic core

Abstract

PURPOSE:To avoid magnetic saturation of iron core due to magnetic flux leaked from the outside and to prevent circumferential eddy current, by providing a current transformer with a magnetic shield having blocks consisting of laminated iron plates. CONSTITUTION:A primary conductor 4 is inserted through a current transformer consisting of a ring-shaped iron core 1 and a secondary conductor 2 wound on the core 1. The transformer body and a part of the primary conductor 4 are covered with a magnetic shield 9. The shield 9 having a circular section coaxial with the core 1 is divided into a plurality of blocks 5 such that gaps defined between the blocks 5 are opposed to each other across the center of the core 1. Thereby, eddy current is inhibited from flowing in the axial direction through the shield, while magnetic flux is inhibited from flowing circumferentially through the ring-shaped section. Accordingly, it is possible to avoid magnetic saturation of the core 1 due to magnetic flux leaked from the outside, and to prevent the creeping of eddy current.
JP62172287A 1987-07-10 1987-07-10 Current transformer Pending JPS6417414A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62172287A JPS6417414A (en) 1987-07-10 1987-07-10 Current transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62172287A JPS6417414A (en) 1987-07-10 1987-07-10 Current transformer

Publications (1)

Publication Number Publication Date
JPS6417414A true JPS6417414A (en) 1989-01-20

Family

ID=15939132

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62172287A Pending JPS6417414A (en) 1987-07-10 1987-07-10 Current transformer

Country Status (1)

Country Link
JP (1) JPS6417414A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6191673B1 (en) 1998-05-21 2001-02-20 Mitsubushi Denki Kabushiki Kaisha Current transformer
JP2004228176A (en) * 2003-01-21 2004-08-12 Fuji Electric Holdings Co Ltd Zero-phase current transformer
JP2009135523A (en) * 2009-03-09 2009-06-18 Panasonic Electric Works Co Ltd Coil and current sensor using the same
CN102074344A (en) * 2010-12-06 2011-05-25 保定天威集团有限公司 Secondary winding group structure of current transformer
JP2011205025A (en) * 2010-03-26 2011-10-13 Kawamura Electric Inc Zero-phase current transformer
JP2011205024A (en) * 2010-03-26 2011-10-13 Kawamura Electric Inc Zero-phase current transformer
CN103137312A (en) * 2011-11-22 2013-06-05 Abb技术有限公司 Current transformer
EP2996121A1 (en) * 2014-09-09 2016-03-16 Core Elektronik Ticaret ve Sanayi Ltd. Sti. Improved current transformer shield for an electronic watt-hour meter

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6191673B1 (en) 1998-05-21 2001-02-20 Mitsubushi Denki Kabushiki Kaisha Current transformer
JP2004228176A (en) * 2003-01-21 2004-08-12 Fuji Electric Holdings Co Ltd Zero-phase current transformer
JP2009135523A (en) * 2009-03-09 2009-06-18 Panasonic Electric Works Co Ltd Coil and current sensor using the same
JP2011205025A (en) * 2010-03-26 2011-10-13 Kawamura Electric Inc Zero-phase current transformer
JP2011205024A (en) * 2010-03-26 2011-10-13 Kawamura Electric Inc Zero-phase current transformer
CN102074344A (en) * 2010-12-06 2011-05-25 保定天威集团有限公司 Secondary winding group structure of current transformer
CN103137312A (en) * 2011-11-22 2013-06-05 Abb技术有限公司 Current transformer
EP2996121A1 (en) * 2014-09-09 2016-03-16 Core Elektronik Ticaret ve Sanayi Ltd. Sti. Improved current transformer shield for an electronic watt-hour meter

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