Cable junction with integrated space charge detector

Patent metadata

Field	Value
Publication number	US-11385274-B2
Application number	US-201916660343-A
Country	US
Kind code	B2
Filing date	Oct 22, 2019
Priority date	Oct 25, 2018
Publication date	Jul 12, 2022
Grant date	Jul 12, 2022

Abstract

This power cable junction (10) has an end part of a power cable which has an electrically insulating material (122). The junction (10) has a predetermined region containing a module for measuring the space charge of the insulating material (122).

First claim

The invention claimed is:

1. A power cable junction comprising:
an end part of a power cable, said cable having an electrically insulating material, wherein said power cable junction has a predetermined region containing a module for measuring the space charge of said insulating material,
wherein said measurement module comprises at least two electrodes,
a piezoelectric sensor,
at least one mechanical vibration damping element placed in contact with the piezoelectric sensor, and
means for connecting a source of high-voltage electrical pulses, such source of high-voltage electrical pulses being external to the junction and those means for connecting being made of a coaxial cable, whose central conductor is linked to the electrodes and whose coaxial conductor is linked to the metal screen of the cable and of the junction.

2. The power cable junction according to claim 1 , wherein said measurement module comprises six electrodes.

3. The power cable junction according to claim 1 , wherein said measurement module comprises an acoustic delay line.

4. A power cable, wherein said power cable is equipped with at least one power cable junction according to claim 1 .

5. The cable according to claim 4 , wherein said cable is of the high-voltage direct current, or HVDC, type.

6. The cable according to claim 4 , wherein said cable is extruded.

Assignees

• Nexans

Inventors

• Mirebeau Pierre
• Guffond Raphael

Classifications

• G01R31/1272

  of cable, line or wire insulation, e.g. using partial discharge measurements (locating faults in cables G01R31/083) · CPC title

• G01R31/1209

  using acoustic measurements (acoustic measurements G01H3/00) · CPC title

• H02G15/085

  for coaxial cables or hollow conductors (plug and socket connections between HF conductors H01P1/04; plug and socket connections per se H01R24/38) · CPC title

• G01R31/16

  Construction of testing vessels; Electrodes therefor · CPC title

• H02G1/00

  Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines · CPC title