Flux absorber for power line device

Patent metadata

Field	Value
Publication number	US-11353480-B2
Application number	US-202016838438-A
Country	US
Kind code	B2
Filing date	Apr 2, 2020
Priority date	Oct 2, 2017
Publication date	Jun 7, 2022
Grant date	Jun 7, 2022

Abstract

Unique systems, methods, techniques and apparatuses of a power line measurement device are disclosed. One exemplary embodiment is a measurement device comprising a measurement device structured to at least partially surround a segment of a power distribution line, the measurement device including a winding portion spaced apart from the segment of the power distribution line structured to receive magnetic flux from the power distribution line and to output data corresponding to a current flowing through the power distribution line; and a magnetic shield spaced apart from the measurement device and positioned radially outward from the winding portion relative to the segment of the power distribution line, the magnetic shield comprising a first section and a second section coupled to the first section at an obtuse angle, the magnetic shield being structured to reduce an amount of external flux from being received with the measurement device.

First claim

What is claimed is:

1. A power line device comprising:
a measurement device structured to at least partially surround a segment of a power distribution line, the measurement device including a first winding portion spaced apart from the segment of the power distribution line and a second winding portion spaced apart from the segment of the power distribution line at a location spaced apart from and facing the first winding portion and two cores arranged such that the power distribution line passes between the two cores and structured to receive magnetic flux from the power distribution line and to output data corresponding to a current flowing through the power distribution line; and
a magnetic shield spaced apart from the measurement device and positioned radially outward from the first winding portion and the second winding portion relative to the segment of the power distribution line, the magnetic shield comprising a first section and a second section coupled to the first section at a first obtuse angle, the magnetic shield being structured to reduce an amount of external flux from being received with the measurement device.

2. The power line device of claim 1 , wherein the first winding portion is separated from the power distribution line by a first distance and the second winding portion is separated from the power distribution line by a second distance, the first winding portion and the second winding portion each forming an air gap.

3. The power line device of claim 1 , wherein the magnetic shield comprises a third section coupled to the first section at a second obtuse angle, wherein the first obtuse angle and the second obtuse angle are different.

4. The power line device of claim 1 , wherein the measurement device comprises a core, and the core and the magnetic shield are comprised of the same material.

5. The power line device of claim 4 , wherein the core and the magnetic shield are comprised of M4 steel.

6. The power line device of claim 1 , wherein the magnetic shield consists essentially of an inside layer facing the measurement device and an outside layer facing away from the measurement device, wherein the measurement device comprises a core, and wherein the inside layer is comprised of the same material as the core, but the outside layer is not comprised of the same material.

7. The power line device of claim 1 , wherein the external flux is generated by a second power distribution line proximate to the measurement device, and wherein the power distribution line and the second power distribution line are arranged horizontally or vertically.

8. The power line device of claim 1 , wherein the first section and the second section of the magnetic shield are located a first distance from the segment of the power distribution line and the first winding portion is located a second distance from the power distribution line, wherein the first distance is greater than the second distance.

9. The power line device of claim 1 , wherein the magnetic shield is a first magnetic shield, and comprising a second magnetic shield.

10. The power line device of claim 9 , wherein the first magnetic shield consists essentially of the first section and the second section coupled to the first section at the first obtuse angle and the second magnetic shield consists essentially of a third section and a fourth section coupled to the third section at an obtuse angle.

11. The power line device of claim 10 , wherein the magnetic shields are oriented such that their respective first and third sections are parallel to one another and their respective second and fourth sections extend inward toward one another from portions of their respective first and third sections which are oriented in the same direction relative to the segment of the power distribution line.

12. The power line device of claim 10 , wherein the measurement device comprises a core, wherein a width of the magnetic shield is greater than a width of the core.

13. The power line device of claim 10 , wherein the measurement device comprises a core, wherein a first distance between the core and the power distribution line is greater than a second distance between the power distribution line and the magnetic shield.

Assignees

• Abb Schweiz Ag

Inventors

• Siddharth Vivek
• Wang Lei
• Chorzepa Jaroslaw Wojciech
• Shaw Steve A
• Singh Bandeep
• Raschka David

Classifications

• G01R1/18 Primary

  Screening arrangements against electric or magnetic fields, e.g. against earth's field · CPC title

• G01R33/02

  Measuring direction or magnitude of magnetic fields or magnetic flux (G01R33/20 takes precedence) · CPC title

• G01R15/183

  using transformers with a magnetic core · CPC title

• G01R15/185 Primary

  with compensation or feedback windings or interacting coils, e.g. 0-flux sensors (using galvano-magnetic field sensors G01R15/20; conversion of DC into AC using transductors G01R19/20) · CPC title