Wire wound resistor arrangement and sensing arrangement including the same

Patent metadata

Field	Value
Publication number	US-9810718-B2
Application number	US-201514657264-A
Country	US
Kind code	B2
Filing date	Mar 13, 2015
Priority date	Mar 13, 2015
Publication date	Nov 7, 2017
Grant date	Nov 7, 2017

Abstract

A wire wound resistor arrangement including a plurality of wire wound resistors electrically connected in a series connection, a first terminal disposed at a first end of the series connection of wire wound resistors, and a second terminal disposed at a second end of the series connection of wire wound resistors. The wire wound resistors are arranged in a polygonal shape having at least three vertices the first terminal and the second terminal are disposed at one of the vertices.

First claim

What is claimed is:

1. A sensing arrangement structured to sense current or voltage of at least one conductor, the sensing arrangement comprising:
a plurality of wire wound resistors electrically connected in a series connection;
a first terminal disposed at a first end of the series connection of wire wound resistors; and
a second terminal disposed at a second end of the series connection of wire wound resistors, wherein the wire wound resistors are arranged in a polygonal shape having at least three vertices, and wherein the first terminal and the second terminal are disposed at one of the vertices,
wherein each of the wire wound resistors has a resistance of at least 7 kΩ.

2. The sensing arrangement of claim 1 , wherein the polygonal shape is a triangle.

3. The sensing arrangement of claim 1 , wherein the polygonal shape is at least one of a square and a hexagon.

4. The sensing arrangement of claim 1 , wherein each of the wire wound resistors includes a core and a wire wound around the core.

5. The sensing arrangement of claim 4 , wherein the wire is composed of at least one of copper alloys, silver alloys, nickel chromium alloys, iron chromium allows, and iron chromium aluminum alloys; and wherein the core is composed of at least one of ceramic, plastic, and glass.

6. The sensing arrangement of claim 4 , wherein the wire is wound around the core in a normal coil winding.

7. A sensing arrangement structured to sense current or voltage of at least one conductor, the sensing arrangement comprising:
at least one wire wound resistor arrangement comprising:
a plurality of wire wound resistors electrically connected in a series connection;
a first terminal disposed at a first end of the series connection of wire wound resistors; and
a second terminal disposed at a second end of the series connection of wire wound resistors,
wherein the wire wound resistors are arranged in a polygonal shape having at least three vertices, and
wherein the first terminal and the second terminal are disposed at one of the vertices; and

a measurement unit electrically connected to at least one of the first and second terminals of said at least one wire wound resistor arrangement, and
wherein the wire wound resistor arrangement is structured to allow the conductor to pass through an interior of the polygonal shape,
wherein the measurement unit is structured to determine the current or voltage of the conductor based on an output of at least one of the first and second terminals of said at least one wire wound resistor arrangement,
wherein each of the wire wound resistors has a resistance of at least 7 kΩ.

8. The sensing arrangement of claim 7 , wherein the at least one conductor is one conductor; wherein the at least one wire wound resistor arrangement is one wire wound resistor arrangement; wherein the measurement unit is electrically connected to the first and second terminals of the one wire wound resistor arrangement; and wherein the measurement unit is structured to determine the current in the conductor based on an output at the first and second terminals of the one wire wound resistor arrangement.

9. The sensing arrangement of claim 7 , wherein the measurement unit is structured to determine an amount of current flowing through the at least one conductor.

10. The sensing arrangement of claim 7 , wherein the measurement unit is structured to determine a presence or absence of current flowing through the at least one conductor without sensing an amount of current flowing through the at least one conductor.

11. The sensing arrangement of claim 7 , wherein the polygonal shape is a triangle.

12. The sensing arrangement of claim 7 , wherein the polygonal shape is at least one of a square and a hexagon.

13. The sensing arrangement of claim 7 , wherein each of the wire wound resistors includes a core and a wire wound around the core.

14. The sensing arrangement of claim 13 , wherein the wire is composed of at least one of copper alloys, silver alloys, nickel chromium alloys, iron chromium allows, and iron chromium aluminum alloys; and wherein the core is composed of at least one of ceramic, plastic, and glass.

15. The sensing arrangement of claim 13 , wherein the wire is wound around the core in a normal coil winding.

16. The sensing arrangement structured to sense current or voltage of at least one conductor, the sensing arrangement comprising:
at least one wire wound resistor arrangement comprising:
a plurality of wire wound resistors electrically connected in a series connection;
a first terminal disposed at a first end of the series connection of wire wound resistors; and
a second terminal disposed at a second end of the series connection of wire wound resistors,
wherein the wire wound resistors are arranged in a polygonal shape having at least three vertices, and
wherein the first terminal and the second terminal are disposed at one of the vertices; and

a measurement unit electrically connected to at least one of the first and second terminals of said at least one wire wound resistor arrangement, and
wherein the wire wound resistor arrangement is structured to allow the conductor to pass through an interior of the polygonal shape,
wherein the measurement unit is structured to determine the current or voltage of the conductor based on an output of at least one of the first and second terminals of said at least one wire wound resistor arrangement, and

wherein the at least one conductor is two conductors; wherein the at least one wire wound resistor arrangement is two wire wound resistor arrangements respectively corresponding to the two conductors; wherein the two wire wound resistor arrangements are electrically connected to the two conductors, respectively; wherein the second terminals of the two wire wound resistor arrangements are electrically connected to the measurement unit; and wherein the measurement unit is structured to determine the current of the two conductors and a voltage difference between the two conductors based on outputs of the second terminals of the two wire wound resistor arrangements.

17. The sensing arrangement of claim 16 , wherein each of the two wire wound resistor arrangements are electrically connected to a corresponding one of the two conductors by an electrical connection at a vertex of the polygonal shape and a point on the corresponding one of the two conductors.

18. The sensing arrangement of claim 16 , wherein the two conductors are line and neutral conductors, respectively.

19. The sensing arrangement of claim 16 , wherein the polygonal shape is at least one of a triangle, a square, and a hexagon.

20. The sensing arrangement of claim 16 , wherein each of the wire wound resistors includes a core and a wire wound around the core, and wherein the wire is composed of at least one of copper alloys, silver alloys, nickel chromium alloys, iron chromium allows, and iron chromium aluminum alloys; and wherein the core is composed of at least one of ceramic, plastic, and glass.

Assignees

• Eaton Corp

Inventors

• Walsh Patrick Thomas
• Miller Theodore James

Classifications

• H01C3/14

  the resistive element being formed in two or more coils or loops continuously wound as a spiral, helical or toroidal winding (H01C3/02 - H01C3/12 take precedence) · CPC title

• H01C1/14

  Terminals or tapping points specially adapted for resistors; Arrangements of terminals or tapping points on resistors · CPC title

• G01R15/181 Primary

  using coils without a magnetic core, e.g. Rogowski coils · CPC title

• G01R19/10

  Measuring sum, difference or ratio · CPC title

• H01C1/16

  Resistor networks not otherwise provided for · CPC title