IT1224773B - Instrument transformer for primary current measuring - Google Patents

Instrument transformer for primary current measuring

Info

Publication number
IT1224773B
IT1224773B IT8848454A IT4845488A IT1224773B IT 1224773 B IT1224773 B IT 1224773B IT 8848454 A IT8848454 A IT 8848454A IT 4845488 A IT4845488 A IT 4845488A IT 1224773 B IT1224773 B IT 1224773B
Authority
IT
Italy
Prior art keywords
air gap
magnetic
branches
current measuring
primary current
Prior art date
Application number
IT8848454A
Other languages
Italian (it)
Other versions
IT8848454A0 (en
Inventor
Gudel Claude
Original Assignee
Lem Liaisons Electron Mec
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
Priority claimed from CH4071/87A external-priority patent/CH674088A5/fr
Application filed by Lem Liaisons Electron Mec filed Critical Lem Liaisons Electron Mec
Publication of IT8848454A0 publication Critical patent/IT8848454A0/en
Application granted granted Critical
Publication of IT1224773B publication Critical patent/IT1224773B/en

Links

Abstract

The transformer has at least one magnetic circuit, connectable to the primary conductor, and an air gap between its two branches. A measuring coil surrounds the air gap, in which is fitted a magnetic field detector. An included current source has a control circuit, with input and output terminals coupled to the magnetic field detector. A magnetic screen (9) surrounds the air gap (2) inside the measuring coil (5) such that almost the entire cross-sectional periphery of the two branches of the magnetic circuit (1), forming the air gap, are surrounded. The screen is insulated from the magnetic circuit branches by a layer (14) of a non-magnetic material.
IT8848454A 1987-10-16 1988-10-14 Instrument transformer for primary current measuring IT1224773B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH4071/87A CH674088A5 (en) 1987-10-16 1987-10-16

Publications (2)

Publication Number Publication Date
IT8848454A0 IT8848454A0 (en) 1988-10-14
IT1224773B true IT1224773B (en) 1990-10-18

Family

ID=4269281

Family Applications (1)

Application Number Title Priority Date Filing Date
IT8848454A IT1224773B (en) 1987-10-16 1988-10-14 Instrument transformer for primary current measuring

Country Status (2)

Country Link
CN (1) CN1014466B (en)
IT (1) IT1224773B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5731363B2 (en) * 2011-11-28 2015-06-10 株式会社豊田自動織機 Current detector
CN102830265A (en) * 2012-09-04 2012-12-19 上海舜宇海逸光电技术有限公司 Current measurement device
EP3159706A4 (en) * 2014-06-20 2018-03-21 Hitachi Automotive Systems, Ltd. Current detection device

Also Published As

Publication number Publication date
IT8848454A0 (en) 1988-10-14
CN1014466B (en) 1991-10-23
CN1035561A (en) 1989-09-13

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Legal Events

Date Code Title Description
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19931026