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Fireproof construction for cables, low or medium voltage instrument cables

A fire-proof structure and cable technology, which is applied in the direction of cable, insulated cable, cable/conductor manufacturing, etc., and can solve problems such as insufficient protection

Active Publication Date: 2021-06-04
线缆系统集团总公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, this type of solution has the disadvantage that it allows gases and / or liquids in the cable to migrate through the duct, all of which makes the protection insufficient for certain cable applications

Method used

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  • Fireproof construction for cables, low or medium voltage instrument cables
  • Fireproof construction for cables, low or medium voltage instrument cables
  • Fireproof construction for cables, low or medium voltage instrument cables

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0085] Following previous tests, three variants of RFOU-HCF cables (hydrocarbon fire-resistant, flame-retardant, medium-voltage cables) were compared, with the characteristics described in Table I.

[0086] Table 1.

[0087]

[0088] From the results shown in Table I, it was observed that the best survival time results (understanding that this is the total time the cable can be run during the test) were obtained with cable "C" in which the non-porous solid ceramizable material was combined with the porous The combination of fiberglass tapes obtained a survival time value of 65 minutes at a temperature of 1100°C, from which it can be gleaned that the perforated tape is essential for cables to achieve increased survival times in the hydrocarbon fire test (based on standard NEK TS 606:2009).

[0089] Cable "A" conforms to the typical structures mentioned in the state of the art, so that the tests performed can demonstrate that the structures of the invention have a greater re...

example 2

[0102] Two BFOU-HCF cables (halogen-free, flame retardant, instrument cables with hydrocarbon fire protection) using the ceramizable material of the present invention were compared. In the case of cable 1, a non-porous, fiberglass tape, coated with a ceramizable material, and in the case of cable 2, a porous mesh of a hydrocarbon fireproof structure according to the invention is used form of fiberglass tape.

[0103] Table 2. Fire Test Results

[0104]

[0105] Because the tape has no pores, the ceramizable material does not expand through the tape, eventually destroying the tape. The ceramizable material expands through the holes to allow a longer test duration than the previous test.

[0106] From the results shown in Table 2, it was collected that the hole effect is crucial for increasing the survival time in the fire resistance test. Expansion of the material through the holes is key to the good operation of this system.

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Abstract

Fireproof construction for cables, low or medium voltage instrument cables. The present invention relates to a fire protection structure for low or medium voltage instrument cables placed on a cable core, the fire protection structure comprising: a first layer of extruded ceramizable thermoplastic compound, the first layer being placed on the cable above the core; a second layer, disposed over the first layer, acts as a fire barrier, retains a ceramizable compound on the cable core and is designed to allow the ceramizable compound to expand and a third layer of extruded plastic solids overlying said second layer to act as a fire barrier without active protection against hydrocarbon-generated fire. The invention allows said cables to be used in a safe manner in fixed installations located in areas where resistance to fires produced by hydrocarbons is critical.

Description

technical field [0001] The invention relates to fireproof structures for cables, low or medium voltage instrument cables and uses thereof. Background technique [0002] Cables used in safety-critical facilities have traditionally not included fire protection. As a result, it is necessary to increase the protection against possible fire after the cable has been installed, for example by applying intumescent paint or fire-resistant tape. This trend has changed in recent years and it is now possible to find high security cables that have fire protection incorporated into their design, where post-installation protection is not necessary. [0003] Solutions to protect cables from HCF (Hydrocarbon Fire) exist on the market (mainly in the "OGP" (Oil, Gas and Petroleum) market) and therefore they can be considered state of the art part. They essentially consist of the use of a ceramicable compound that is extruded inside with large cavities that, in the event of a fire, allow the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B13/24H01B3/30H01B3/48
CPCH01B13/24H01B7/295H01B3/441H01B3/30H01B3/48H01B7/29
Inventor N·吉尼罗·博伊克斯D·卡尔维拉斯·伊巴涅斯V·梅卡德·瓦尔布埃纳C·施吕特-亨里克森
Owner 线缆系统集团总公司