Voltage divider assembly

Patent metadata

Field	Value
Publication number	US-11327096-B2
Application number	US-201816771950-A
Country	US
Kind code	B2
Filing date	Dec 17, 2018
Priority date	Dec 18, 2017
Publication date	May 10, 2022
Grant date	May 10, 2022

Abstract

A voltage divider assembly for a voltage-dividing sensor for sensing a voltage of a MV/HV power conductor in a power network includes a plurality of discrete impedance elements electrically connected in series with each other such as to be operable as a high-voltage cable side of the voltage-dividing sensor and a cable connector for mechanical engagement with a cable plug at an end of a tap cable conducting the voltage of the power conductor to the voltage divider assembly. The cable connector is electrically connected with one discrete impedance element of the plurality of discrete impedance elements.

First claim

The invention claimed is:

1. Voltage divider assembly operable in a voltage-dividing sensor for sensing a voltage of a MV/HV power conductor in a power network of a national grid, the voltage divider assembly comprising:
a) a plurality of discrete impedance elements, electrically connected in series with each other and operable as a cable side of the voltage-dividing sensor;
b) a cable connector for mechanical engagement with a cable plug at an end of a tap cable conducting the voltage of the power conductor to the voltage divider assembly,
wherein the cable connector comprises a conductive portion, electrically connected with one discrete impedance element of the plurality of discrete impedance elements, and electrically connectable to the cable plug by engagement of the cable plug with the cable connector, wherein the cable connector comprises a shape specifically configured for mechanical engagement with a corresponding, matching tailored cable plug.

2. Voltage divider assembly according to claim 1 , having an elongate shape defining a length direction of the voltage divider assembly, wherein the plurality of discrete impedance elements is arranged linearly in a straight row defining a long direction, wherein the long direction of the row is parallel, within an angle of +/−15°, to the length direction of the voltage divider assembly.

3. Voltage divider assembly according to claim 1 , having an elongate shape defining a length direction of the voltage divider assembly, a first end portion, an opposed second end portion and a middle portion, connecting the first end portion with the second end portion of the voltage divider assembly, wherein the cable connector is arranged at the first end portion.

4. Voltage divider assembly according to claim 3 , wherein the geometric extension of the voltage divider assembly, measured linearly between its opposed end portions and including the end portions, is 10 cm or greater, 15 cm or greater, or 20 cm or greater.

5. Voltage divider assembly according to claim 1 , wherein the plurality of discrete impedance elements is arranged on a printed circuit board.

6. Voltage divider assembly according to claim 5 , wherein the cable connector is attached to printed circuit board.

7. Voltage divider assembly according to claim 1 , wherein the plurality of discrete impedance elements comprises ten or more discrete impedance elements.

8. Voltage divider assembly according claim 1 , wherein the cable connector is adapted for releasable mechanical engagement with a cable plug at an end of a tap cable conducting the voltage of the power conductor to the voltage divider assembly.

9. Voltage divider assembly according to claim 1 , further comprising a signal wire for making a voltage divided by the plurality of discrete impedance elements, and indicative of the voltage of the power conductor, available for measurement outside the voltage divider assembly.

10. Voltage divider assembly according to claim 1 , wherein the plurality of discrete impedance elements is embedded in a solid, electrically insulating encapsulation body.

11. Voltage divider assembly according to claim 10 , wherein the encapsulation body encapsulates a first portion of the cable connector, and leaves a second portion of the cable connector accessible for engagement with a cable plug of a tap cable.

12. Voltage divider assembly according to claim 10 , wherein the encapsulation body comprises a wall portion forming a recess, and wherein at least an accessible portion of the cable connector is arranged in the recess.

13. Kit of parts for electrically connecting elements of a voltage-dividing sensor to a power conductor, the kit comprising:
a) a voltage divider assembly according to claim 1 ; and
b) a cable plug, connectable to a central conductor of a tap cable for conducting the voltage of the power conductor to the voltage divider assembly, the cable plug comprising an engagement element, specifically adapted for engaging with a corresponding engagement element of the cable connector of the voltage divider assembly.

14. Voltage divider block comprising
a first voltage divider assembly according to claim 1 and
a second voltage divider assembly according to claim 1 ,
wherein the plurality of discrete impedance elements of the first voltage divider assembly and the plurality of discrete impedance elements of the second voltage divider assembly are embedded in one single solid, electrically insulating encapsulation body.

15. Power network of a national grid, comprising a MV/HV power conductor, a voltage divider assembly according to claim 1 , and a tap cable conducting the voltage of the power conductor to the voltage divider assembly and comprising a cable plug at one of its ends, the cable plug being engaged with the cable connector of the voltage divider assembly.

16. The kit of parts according to claim 13 , further comprising:
a tap cable for conducting the voltage of the power conductor to the voltage divider assembly, the tap cable comprising a central conductor to which the cable plug is connectable.

Assignees

• 3M Innovative Properties Co

Inventors

• Van Meijl Hermanus Franciscus Maria
• Stalder Michael H

Classifications

• G01R31/50

  Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections (testing of sparking plugs H01T13/58) · CPC title

• G01R15/06 Primary

  having reactive components, e.g. capacitive transformer · CPC title

• G01R15/04

  Voltage dividers · CPC title

• G01R19/0084

  Measuring voltage only · CPC title