Fire resistant electric cable

Patent metadata

Field	Value
Publication number	US-10515741-B2
Application number	US-201516060744-A
Country	US
Kind code	B2
Filing date	Dec 9, 2015
Priority date	Dec 9, 2015
Publication date	Dec 24, 2019
Grant date	Dec 24, 2019

Abstract

A cable includes a conductor and a first semiconductive layer arranged in a radially outer position with respect to the conductor. An insulating layer is arranged in a radially outer position with respect to the first semiconductive layer. A second semiconductive layer is arranged in a radially outer position with respect to the insulating. A conductive screen is arranged in a radially outer position with respect to the second semiconductive layer. A heat block layer is arranged in a radially outer position with respect to the conductive screen. The heat block layer includes a layer made of a fire resistant or a flame retardant halogen-free material. A rubberized glass fiber tape is arranged in a radially outer position with respect to the heat block layer. An outer sheath is arranged in a radially outer position with respect to the rubberized glass fiber tape.

First claim

The invention claimed is:

1. A cable, comprising:
a conductor;
a first semiconductive layer arranged in a radially outer position with respect to the conductor;
an insulating layer arranged in a radially outer position with respect to the first semiconductive layer and directly contacting the first semiconductive layer;
a second semiconductive layer arranged in a radially outer position with respect to the insulating layer and directly contacting the insulating layer;
a conductive screen arranged in a radially outer position with respect to the second semiconductive layer;
a heat block layer arranged in a radially outer position with respect to the conductive screen, the heat block layer comprising a layer made of a fire resistant or a flame retardant halogen-free material;
a rubberized glass fiber tape arranged in a radially outer position with respect to the heat block layer and having a rubberized surface outward facing;
a first glass fiber tape radially interposed between the conductive screen and the rubberized glass fiber tape;
a second glass fiber tape radially interposed between the conductive screen and the rubberized glass fiber tape; and
an outer sheath arranged in a radially outer position with respect to the rubberized glass fiber tape and directly contacting the rubberized surface of the rubberized glass fiber tape.

2. The cable according to claim 1 , wherein the rubberized glass fiber tape is bonded to the outer sheath.

3. The cable according to claim 1 , wherein the first glass fiber tape is radially interposed between the conductive screen and the heat block layer.

4. The cable according to claim 1 , wherein the second glass fiber tape is radially interposed between the heat block layer and the rubberized glass fiber tape.

5. The cable according to claim 1 , wherein:
the first glass fiber tape is radially interposed between the conductive screen and the heat block layer; and
the second glass fiber tape is radially interposed between the heat block layer and the rubberized glass fiber tape.

6. The cable according to claim 1 , comprising a metallic armor radially interposed between the heat block layer and the rubberized glass fiber tape.

7. The cable according to claim 6 , wherein the first glass fiber tape is arranged in a radially outer position with respect to the heat block layer, wherein the metallic armor is radially interposed between the first glass fiber tape and the rubberized glass fiber tape.

8. The cable according to claim 1 , wherein the outer sheath is made of a flame retardant halogen-free material.

9. The cable according to claim 1 , wherein the outer sheath is made of a mud and/or oil resistant material.

10. A cable, comprising:
a conductor;
a first semiconductive layer arranged in a radially outer position with respect to the conductor;
an insulating layer arranged in a radially outer position with respect to the first semiconductive layer;
a second semiconductive layer arranged in a radially outer position with respect to the insulating layer;
a conductive screen arranged in a radially outer position with respect to the second semiconductive layer;
a first glass fiber tape arranged in a radially outer position with respect to the conductive screen;
a heat block layer arranged in a radially outer position with respect to the first glass fiber tape, the heat block layer comprising a layer made of a fire resistant or a flame retardant halogen-free material;
a second glass fiber tape arranged in a radially outer position with respect to the heat block layer;
a rubberized glass fiber tape arranged in a radially outer position with respect to the second glass fiber tape and having a rubberized surface outward facing; and
an outer sheath arranged in a radially outer position with respect to the rubberized glass fiber tape.

11. The cable according to claim 10 , wherein the insulating layer directly contacts the first semiconductive layer.

12. The cable according to claim 10 , wherein the second semiconductive layer directly contacts the insulating layer.

13. The cable according to claim 10 , wherein the outer sheath directly contacts the rubberized surface of the rubberized glass fiber tape.

14. The cable according to claim 13 , wherein the rubberized glass fiber tape is bonded to the outer sheath.

15. The cable according to claim 10 , wherein the outer sheath is made of a flame retardant halogen-free material.

16. The cable according to claim 10 , wherein the outer sheath is made of a mud and/or oil resistant material.

17. A cable, comprising:
a conductor;
a first semiconductive layer arranged in a radially outer position with respect to the conductor;
an insulating layer arranged in a radially outer position with respect to the first semiconductive layer and directly contacting the first semiconductive layer;
a second semiconductive layer arranged in a radially outer position with respect to the insulating layer and directly contacting the insulating layer;
a conductive screen arranged in a radially outer position with respect to the second semiconductive layer;
a first glass fiber tape arranged in a radially outer position with respect to the conductive screen;
a heat block layer arranged in a radially outer position with respect to the first glass fiber tape, the heat block layer comprising a layer made of a fire resistant or a flame retardant halogen-free material;
a second glass fiber tape arranged in a radially outer position with respect to the heat block layer;
a rubberized glass fiber tape arranged in a radially outer position with respect to the second glass fiber tape and having a rubberized surface outward facing; and
an outer sheath arranged in a radially outer position with respect to the rubberized glass fiber tape and directly contacting the rubberized surface of the rubberized glass fiber tape.

18. The cable according to claim 10 , further comprising a metallic armor arranged in a radially outer position with respect to the second glass fiber tape.

19. The cable according to claim 17 , further comprising a metallic armor arranged in a radially outer position with respect to the second glass fiber tape.

Assignees

• Prysmian Spa

Inventors

• Foss-Pedersen Geir
• Edland Oystein
• Van Den Nieuwendijk Yannick

Classifications

• H01B7/292

  using material resistant to heat · CPC title

• H01B7/0225

  Three or more layers · CPC title

• H01B7/295 Primary

  using material resistant to flame · CPC title

• H01B3/082

  Wires with glass or glass wool · CPC title

• H01B7/0275

  comprising one or more extruded layers of insulation · CPC title