Optoelectric Measuring Device And Method For Measuring An Electrical Current
US-2017350922-A1 · Dec 7, 2017 · US
Single-phase optical current transformer
US8933686B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8933686-B2 |
| Application number | US-201013517493-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 13, 2010 |
| Priority date | Dec 21, 2009 |
| Publication date | Jan 13, 2015 |
| Grant date | Jan 13, 2015 |
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Abstract
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An installation base is secured to part of outer peripheral surface of cylindrical container 1 which has electric conductor 2 arranged thereinside, and a case which stores a Faraday-effect element is detachably secured to the installation base. Faraday-effect element 10 having two optical fibers 24 A, 24 B of prescribed dimensions, to provide first and second optical paths 11 A, 11 B maintained in parallel with a predetermined interval therebetween and placed so as to intersect axial direction of electric conductor 2 , and having mirror 12 which reflects linearly polarized light at one end surface of each optical fiber. Linearly polarized light from the same light source injected into each of the optical paths 11 A, 11 B, and current flowing in electric conductor 2 is measured base on the Faraday rotation angle of the linearly polarized light reflected and returned from mirror 12.
First claim
Opening claim text (preview).
The invention claimed is: 1. A single-phase optical current transformer comprising: a cylindrical container; an electric conductor being arranged inside the cylindrical container; and a Faraday-effect element being provided on the cylindrical container; the Faraday-effect element having two optical fibers and a mirror, each of the optical fibers being provided outside the cylindrical container, the optical fibers forming a first optical path and a second optical path respect…
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- G01R15/246Primary
Physics · mapped topic
- G01R15/24Primary
Physics · mapped topic
Physics · mapped topic
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- What does patent US8933686B2 cover?
- An installation base is secured to part of outer peripheral surface of cylindrical container 1 which has electric conductor 2 arranged thereinside, and a case which stores a Faraday-effect element is detachably secured to the installation base. Faraday-effect element 10 having two optical fibers 24 A, 24 B of prescribed dimensions, to provide first and second optical paths 11 A, 11 B …
- Who is the assignee on this patent?
- Zhang Wei, Yamaguchi Tatsushi, Hitachi Ltd
- What technology area does this patent fall under?
- Primary CPC classification G01R15/246. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Jan 13 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).