IT1224773B - Instrument transformer for primary current measuring - Google Patents
Instrument transformer for primary current measuringInfo
- 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
Links
- 239000004020 conductor Substances 0.000 abstract 1
- 239000000696 magnetic material Substances 0.000 abstract 1
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.
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)
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 |
-
1988
- 1988-10-14 IT IT8848454A patent/IT1224773B/en active
- 1988-10-15 CN CN 88107089 patent/CN1014466B/en not_active Expired
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 |