Cable termination with an integrated monitoring device

Patent metadata

Field	Value
Publication number	US-10135177-B2
Application number	US-201415510123-A
Country	US
Kind code	B2
Filing date	Sep 22, 2014
Priority date	Sep 22, 2014
Publication date	Nov 20, 2018
Grant date	Nov 20, 2018

Abstract

A cable termination including a cable terminal and a cable joint assembly. The cable terminal includes: a terminal conductor; a monitoring device including a capacitive voltage sensor around the terminal conductor; and an electrically insulating body fitted around the terminal conductor, including a bell-shaped end portion in which the voltage sensor is at least partially embedded. The cable terminal alternatively includes: a terminal conductor; a monitoring device including a capacitive voltage sensor around the terminal conductor; and an electrically insulating body fitted around the terminal conductor, including a bell-shaped end portion in which the voltage sensor is at least partially embedded and a stem end portion, the terminal conductor extending beyond the stem end portion.

First claim

The invention claimed is:

1. A cable termination comprising:
a cable terminal; and
a cable joint assembly,
wherein the cable terminal includes:
a terminal conductor,
a monitoring device having a capacitive voltage sensor around the terminal conductor, and
an electrically insulating body fitted around the terminal conductor, the electrically insulating body having:
a bell-shaped end portion in which the capacitive voltage sensor is at least partially embedded,

wherein, in a side view, the electrically insulating body does not overlap a bottom portion of the terminal conductor.

2. A cable termination according to claim 1 , wherein the capacitive voltage sensor includes a hollow cylinder including a first rim and a second rim, at least the first rim having a rounded shape.

3. A cable termination according to claim 2 , wherein the first rim has a thickness greater than a thickness of the second rim.

4. A cable termination according to claim 2 , wherein the first rim is embedded in the bell-shaped end portion.

5. A cable termination according to claim 1 , wherein the capacitive voltage sensor includes a protruding portion that protrudes out of the bell-shaped end portion of the electrically insulating body.

6. A cable termination according to claim 5 , wherein the protruding portion of the capacitive voltage sensor is covered by an insulating coating.

7. A cable termination according to claim 1 , wherein the monitoring device has a current sensor.

8. A cable termination according to claim 7 , wherein the current sensor is embedded in the bell-shaped end portion.

9. A cable termination according to claim 1 , wherein the monitoring device comprises a processor.

10. A cable termination according to claim 9 ,
wherein the monitoring device has a current sensor, and
wherein the processor is positioned on a surface of the current sensor facing the capacitive voltage sensor.

11. A cable termination according to claim 1 , wherein the cable joint assembly includes a mechanical connector.

12. A cable termination according to claim 1 , wherein the cable joint assembly includes a sleeve.

13. A cable termination according to claim 12 , wherein the sleeve has an insulating joint comprising, in turn, layers of:
an internal semi-conductive layer;
a high permittivity layer;
an external insulating layer; and
an external semi-conductive layer.

14. A cable termination according to claim 13 ,
wherein the capacitive voltage sensor includes a protruding portion that protrudes out of the bell-shaped end portion of the electrically insulating body, and
wherein the layers have longitudinal extensions such that only the external semi-conductive layer at least partially covers the protruding portion of the capacitive voltage sensor that protrudes out of the bell-shaped end portion of the electrically insulating body.

15. A cable termination according to claim 12 , wherein the sleeve includes an insulating sheath.

16. A cable termination according to claim 1 ,
wherein the electrically insulating body further has a stem end portion that extends from the bell-shaped end portion,
wherein a first portion of the capacitive voltage sensor is at least partially embedded in the bell-shaped end portion, and
wherein a second portion of the capacitive voltage sensor is at least partially embedded in the stem end portion.

17. A cable termination according to claim 1 , wherein, in the side view, no portion of the bell-shaped end portion overlaps the bottom portion of the terminal conductor.

18. A cable termination according to claim 1 , wherein the cable joint assembly is configured to surround a portion of the cable terminal and a portion of a cable configured to be electrically connected to the cable terminal.

19. A cable termination according to claim 1 , wherein the electrically insulating body is in direct contact with the terminal conductor.

20. A cable terminal, comprising:
a terminal conductor;
a monitoring device including a capacitive voltage sensor around the terminal conductor; and
an electrically insulating body fitted around the terminal conductor, the electrically insulating body having:
a bell-shaped end portion in which the capacitive voltage sensor is at least partially embedded, and
a stem end portion,

wherein the terminal conductor extends beyond the stem end portion, and
wherein, in a side view, the electrically insulating body does not overlap a bottom portion of the terminal conductor.

Assignees

• Prysmian Spa

Inventors

• Sica Gerardo
• Boffi Paolo
• Quaggia Dario

Classifications

• H02G15/02

  Cable terminations (for gas- or oil-filled cables H02G15/22) · CPC title

• H02G15/064 Primary

  with devices for relieving electrical stress · CPC title

• H01R13/6683

  with built-in sensor · CPC title

• H02G15/182

  held in expanded condition in radial direction prior to installation · CPC title

• G01R15/16 Primary

  using capacitive devices · CPC title