WO2001004912A1 - Gaine de protection thermique pour un faisceau de cables electriques - Google Patents
Gaine de protection thermique pour un faisceau de cables electriques Download PDFInfo
- Publication number
- WO2001004912A1 WO2001004912A1 PCT/FR2000/001955 FR0001955W WO0104912A1 WO 2001004912 A1 WO2001004912 A1 WO 2001004912A1 FR 0001955 W FR0001955 W FR 0001955W WO 0104912 A1 WO0104912 A1 WO 0104912A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- thermal protection
- internal screen
- screen
- fibers
- protection sheath
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
Definitions
- the present invention relates to a thermal protection sheath for an electrical cable bundle, of the type comprising carbonizable oxidized organic fibers.
- a thermal protection sheath for an electrical cable bundle of the type comprising carbonizable oxidized organic fibers.
- the electrical wires can continue to exercise their electrical conduction function for a determined period. More specifically, it is required for the electrical harnesses of an aircraft that the insulation resistance between two wires of the same beam remain greater than 10 ⁇ for five minutes and / or that the temperature of the wires remain less than 250 ° C. for three and a half minutes, when the beam is placed in the presence of a flame of 1100 ° C with a power of 116 kW / m 2 .
- Document FR-A-2,708,781 describes a fire-resistant sheath and its production process.
- the fire-resistant sheath described is essentially formed by an intertwining of synthetic fibers obtained by cracking and spinning an aramid fiber and a carbonizable oxidized organic fiber.
- the aramid fibers and the carbonizable oxidized organic fibers are mixed in a single layer forming a screen.
- thermal protection sheath provides satisfactory protection of the conductors up to a temperature of approximately 850 ° C., this is insufficient for flame temperatures of the order of 1100 ° C.
- the object of the invention is to provide a thermal protection sheath resistant to flame temperatures of the order of 1100 ° C., and guaranteeing satisfactory operation of the electrical wires protected by the sheath for a substantial period.
- the invention relates to a thermal protection sheath for a bundle of electric cables, of the aforementioned type, characterized in that it comprises an internal screen formed of at least one layer comprising mainly carbonizable oxidized organic fibers and an external screen comprising at least one layer formed of ceramic fibers arranged around the internal screen.
- the thermal protection sheath includes one or more of the following characteristics:
- Said internal screen comprises at least 85% by weight of carbonizable oxidized organic fibers
- oxidizable organic carbonizable fibers of said internal screen are based on oxidized polyacrylonitrile; - said internal screen includes chlorofibers;
- Said internal screen comprises at least two superposed layers of carbonizable oxidized organic fibers
- Said internal screen comprises a superposition of braided layers with a total thickness of between 2 and 6 mm; - the ceramic fibers consist of alumino-boro-silicate;
- FIG. 1 is a schematic view of a cable bundle protected by a sheath according to the invention
- - Figure 2 is a cross-sectional view of the beam of Figure 1 taken along the line II-II;
- FIGS. 3 and 4 are curves showing, for two thermal protection sheaths according to the invention having different thicknesses, respectively, changes in the temperature of the conductive wires and their insulation resistance.
- the wiring element shown in FIGS. 1 and 2 comprises a bundle of cables 10 surrounded by a thermal protection sheath 12 according to the invention.
- the bundle of cables 10 consists of a set of cables or electric wires individually insulated by a protective sheath. These electrical wires are for example intended for the transport of control information for the navigation members of a space launcher or of an airplane.
- the thermal protection sheath 12 essentially comprises an internal screen 14 formed of several layers mainly comprising carbonizable oxidized organic fibers, and an external screen 16 comprising a layer formed of ceramic fibers, in particular based on aluminoborosilicate. The external screen 16 is disposed directly around the internal screen 14 without the interposition of an intermediate material.
- the protective sheath 12 has under the internal screen 14 a layer 18 of additional thermal protection mainly comprising KEVLAR marketed by Du Pont de Nemours.
- the sheath 12 has around the external screen 16 a mechanical protection layer 20 made, for example, based on braided aramid fibers.
- the internal screen 14 advantageously consists of at least two layers essentially comprising carbonizable oxidized organic fibers. Preferably, three to seven layers are superimposed for a total thickness of the internal screen 14 of between 2 and 6 mm.
- Each layer is advantageously braided and the successive layers are produced by over-braiding.
- the braiding is adapted so that a large quantity of air is contained in the internal screen 14.
- the internal screen 14 is made up of more than 85% by weight of carbonizable oxidized organic fibers. These fibers are for example based on oxidized polyacrylonitrile (PANO). The majority fibers forming the internal screen 14 are for example
- the internal screen 14 comprises, in addition to the carbonizable oxidized organic fibers, other fibers such as fibers marketed under the name of CHLOROFIBRE manufactured by the company RHOVIL.
- the fibers used in the composition of the internal screen 14 have a resistance at a temperature of around 800 ° C.
- the external screen 16 consists of a braid of continuous filaments.
- These continuous filaments are ceramic filaments, for example made from silica.
- These filaments are advantageously alumino-boro-silicates (ABS), such as NEXTEL yarns, sold by the company 3M.
- ABS alumino-boro-silicates
- These filaments are adapted to withstand a very high temperature, and in particular a temperature of around 1200 ° C.
- These filaments mainly used in the composition of the internal screen 14 can also be formed from Nextel yarns.
- the internal protective layer 18 is arranged around the bundle of wires 10.
- This layer 18 consists of a braid or a taping of KEVLAR or of a mixture of KEVLAR and Chlorofiber.
- the additional thermal protection layer 18 is optional. When this is implemented, the thickness of the internal screen 14 is reduced. In fact, KEVLAR has better thermal insulation properties than oxidized polyacrylonitrile for temperatures close to 450 ° C.
- the implementation of the additional thermal protection layer 18 based on KEVLAR makes it possible to reduce the thickness of the internal screen 14 and thus to reduce the total thickness of the sheath.
- the external mechanical protection layer 20 is advantageously made from braided aramid fibers, and in particular from NOMEX sold by the company Du Pont de Nemours.
- the sheath is advantageously surrounded by a sealing material and in particular a heat-shrinkable sheath or a self-amalgamating tape, such as the heat-shrinkable sheaths sold by the company RAYCHEM under the name of THERMOFIT sheaths and the self-amalgamating silicone ribbons sold by the company NITTO.
- the external screen 16 has the essential property of forming a thermal barrier at high temperature which promotes:
- sheaths of different thicknesses were used. These sheaths, marked A and B, have the characteristics summarized in the following table.
- the sheath A has a thickness less than that of the sheath B.
- the curves shown in Figures 3 and 4 were made with a burner standardized according to ISO 2685.
- identical cable bundles equipped with protective sheaths A and B were placed at a distance of 75 mm from a standard gas burner of 0.018 m 2 with a diameter of 150 mm.
- the standard flame temperature was 1100 ° C ⁇ 80 ° C and the heat flux density was 116 ⁇ 10 kW / m 2 .
- the 6.7 mm diameter cable bundle has six sheathed shielded pairs.
- the temperature of the electric wires is, in the case of sheath B, less than 250 ° C., and in particular less than 200 ° C.
- the temperature after 3 minutes 30 is greater than 250 ° C., it remains less than 250 ° for 2 minutes 30.
- the sheaths A and B have insulation resistances between two adjacent wires much greater than 10 k ⁇ for a duration of exposure to the flame of 5 min.
Landscapes
- Insulated Conductors (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE60017699T DE60017699T2 (de) | 1999-07-07 | 2000-07-06 | Wärmeschutzhülse für einen elektrischen kabelbaum |
EP00949663A EP1110225B1 (fr) | 1999-07-07 | 2000-07-06 | Gaine de protection thermique pour un faisceau de cables electriques |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9908797A FR2796198B1 (fr) | 1999-07-07 | 1999-07-07 | Gaine de protection thermique pour un faisceau de cables electriques |
FR99/08797 | 1999-07-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001004912A1 true WO2001004912A1 (fr) | 2001-01-18 |
Family
ID=9547824
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2000/001955 WO2001004912A1 (fr) | 1999-07-07 | 2000-07-06 | Gaine de protection thermique pour un faisceau de cables electriques |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1110225B1 (fr) |
DE (1) | DE60017699T2 (fr) |
FR (1) | FR2796198B1 (fr) |
WO (1) | WO2001004912A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3619725A1 (fr) * | 2017-05-03 | 2020-03-11 | Favuseal AS | Procédé de protection d'un objet contre le feu et revêtement de protection contre le feu pour un objet |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1995004358A1 (fr) * | 1993-07-30 | 1995-02-09 | Societe Europeenne De Propulsion | Gaine anti-feu et procede d'elaboration de cette gaine |
-
1999
- 1999-07-07 FR FR9908797A patent/FR2796198B1/fr not_active Expired - Lifetime
-
2000
- 2000-07-06 DE DE60017699T patent/DE60017699T2/de not_active Expired - Lifetime
- 2000-07-06 WO PCT/FR2000/001955 patent/WO2001004912A1/fr active IP Right Grant
- 2000-07-06 EP EP00949663A patent/EP1110225B1/fr not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1995004358A1 (fr) * | 1993-07-30 | 1995-02-09 | Societe Europeenne De Propulsion | Gaine anti-feu et procede d'elaboration de cette gaine |
Also Published As
Publication number | Publication date |
---|---|
DE60017699T2 (de) | 2005-09-01 |
FR2796198B1 (fr) | 2001-10-19 |
DE60017699D1 (de) | 2005-03-03 |
EP1110225A1 (fr) | 2001-06-27 |
EP1110225B1 (fr) | 2005-01-26 |
FR2796198A1 (fr) | 2001-01-12 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2040267B1 (fr) | Cable electrique resistant a la propagation d'arc electrique | |
EP0203129B1 (fr) | Revetement isolant souple resistant au feu pour conduites, fils, cables electriques et fibres optiques | |
EP2394273B3 (fr) | Cable de transmission electrique a haute tension | |
EP0068308B1 (fr) | Câble électromécanique résistant à des températures et pressions élevées, et son procédé de fabrication | |
EP1504887B1 (fr) | Cable électrique ignifugé par une gaine externe multicouche | |
EP2441076B1 (fr) | Câble électrique apte à assurer la continuité de distribution électrique en cas d'incendie | |
FR2564988A1 (fr) | Cable a fibres optiques | |
EP1911043A1 (fr) | Cable de securite resistant au feu a une seule enveloppe isolante | |
EP1017063B1 (fr) | Câble de transport d'energie et/ou de télécommunications structurellement reforcé | |
WO2022033329A1 (fr) | Câble optique non métallique totalement sec ignifuge et résistant au feu | |
EP1110225B1 (fr) | Gaine de protection thermique pour un faisceau de cables electriques | |
EP0663100B1 (fr) | Gaine anti-feu et procede d'elaboration de cette gaine | |
WO2004044927A1 (fr) | Cable ignifuge | |
KR101080277B1 (ko) | 신호 전송을 위한 온도센서용 내열성 차폐 케이블 | |
CN210667880U (zh) | 一种柔性矿物绝缘防火电缆 | |
EP0268827B1 (fr) | Câble électrique ignifugé | |
CN208589289U (zh) | 一种铝合金导体耐火电力电缆 | |
BE880326A (fr) | Cable resistant au feu | |
CN214175753U (zh) | 一种电缆耐火包覆片 | |
WO2023247851A1 (fr) | Harnais électrique de puissance pour aéronef | |
EP1172827A1 (fr) | Cable électrique de sécurité | |
JPH065033U (ja) | ゴムキャブタイヤケ−ブル | |
EP1006534B1 (fr) | Câble de raccordement électrique | |
CN117497242A (zh) | 一种高性能矿物质绝缘金属护套电缆及其制备方法 | |
EP2613326A1 (fr) | Cable d'énergie et/ou de télécommunication apte à empecher la propagation d'un incendie |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2000949663 Country of ref document: EP |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 09786638 Country of ref document: US |
|
WWP | Wipo information: published in national office |
Ref document number: 2000949663 Country of ref document: EP |
|
WWG | Wipo information: grant in national office |
Ref document number: 2000949663 Country of ref document: EP |