Conductor assembly

Patent metadata

Field	Value
Publication number	US-9739820-B2
Application number	US-201414897680-A
Country	US
Kind code	B2
Filing date	Jun 19, 2014
Priority date	Jun 19, 2013
Publication date	Aug 22, 2017
Grant date	Aug 22, 2017

Abstract

A conductor assembly for a power network includes an inner conductor, an insulating layer arranged concentrically around the inner conductor, and a sensing electrode, arranged radially outward of the insulating layer, and operable as a first electrode of a sensing capacitor of a voltage sensor. The conductor assembly further includes a voltage pickup element having electrically conductive major surfaces, the first major surface being in a surface contact with the sensing electrode. The conductor assembly further includes an electrode wire, in electrical and mechanical contact with the voltage pickup element, for electrically connecting the voltage pickup element with an electric or electronic component disposed remote from the sensing electrode.

First claim

The invention claimed is:

1. Conductor assembly for a power network, the conductor assembly comprising
an inner conductor, defining axial directions and radial directions,
an insulating layer arranged concentrically around at least an axial section of the inner conductor, and
a sensing electrode, arranged radially outward of the insulating layer, and operable as a first electrode of a sensing capacitor of a voltage sensor,
the inner conductor or a conductor extension is operable as the second electrode of a sensing capacitor of a voltage sensor,

the conductor assembly further comprising
a voltage pickup element,

comprising an electrically conductive first major surface and an opposed electrically conductive second major surface, the first major surface being in a surface contact with the sensing electrode, and
an electrode wire, in electrical and mechanical contact with the voltage pickup element, for electrically connecting the voltage pickup element with an electric or electronic component disposed remote from the sensing electrode,

wherein the voltage pickup element comprises one of an electrically conductive metal film, a metallized film, or an electrically conductive polymeric film.

2. Conductor assembly according to claim 1 , wherein the first major surface and the second major surface of the voltage pickup element are electrically connected with each other.

3. Conductor assembly according to claim 2 , wherein the electrode wire is in mechanical and electrical contact with the second major surface of the voltage pickup element.

4. Conductor assembly according claim 1 , wherein the voltage pickup element has an electrically conductive body portion, arranged between the first major surface and the second major surface.

5. Conductor assembly according to claim 1 , wherein the voltage pickup element comprises a conformable portion.

6. Conductor assembly according to claim 1 , wherein the sensing electrode and the voltage pickup element are comprised in a cable accessory device, a cable splice body, or a cable termination body.

7. Conductor assembly according to claim 1 , further comprising an electrically insulating spacer layer, arranged radially between the insulating layer and the sensing electrode.

8. Conductor assembly according to claim 1 , wherein the inner conductor comprises an inner conductor of a medium-voltage or high-voltage power cable, and where the insulating layer comprises an insulating layer of a medium-voltage or high-voltage power cable.

9. High-voltage or medium-voltage power cable comprising a conductor assembly according to claim 1 .

10. Power network comprising a high-voltage or medium-voltage power cable according to claim 9 .

Assignees

• 3M Innovative Properties Co

Inventors

• Gravermann Mark
• Busemann Friedrich A
• Lohmeier Gerhard
• Weichold Jens
• Schubert Bernd
• Stalder Michael H
• Zanoli Pasquale
• Bolcato Giuliano

Classifications

• G01R31/58 Primary

  Testing of lines, cables or conductors (testing of electric windings G01R31/72) · CPC title

• G01R15/16 Primary

  using capacitive devices · CPC title

• G01R27/2605

  Measuring capacitance (capacitive sensors G01D5/24) · CPC title

• G01R27/26

  Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants {; Measuring impedance or related variables} · CPC title

• H01B9/006

  Constructional features relating to the conductors · CPC title