EP3142125B1 - Cable - Google Patents
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- Publication number
- EP3142125B1 EP3142125B1 EP15184559.1A EP15184559A EP3142125B1 EP 3142125 B1 EP3142125 B1 EP 3142125B1 EP 15184559 A EP15184559 A EP 15184559A EP 3142125 B1 EP3142125 B1 EP 3142125B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cable
- flame
- diffusion barrier
- retardant
- barrier layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000003063 flame retardant Substances 0.000 claims description 54
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 53
- 239000000654 additive Substances 0.000 claims description 47
- 238000009792 diffusion process Methods 0.000 claims description 40
- 238000009413 insulation Methods 0.000 claims description 37
- 230000004888 barrier function Effects 0.000 claims description 34
- 230000000996 additive effect Effects 0.000 claims description 29
- 239000004020 conductor Substances 0.000 claims description 25
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 230000003287 optical effect Effects 0.000 claims description 8
- 239000002861 polymer material Substances 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 238000001125 extrusion Methods 0.000 claims description 3
- 229920000098 polyolefin Polymers 0.000 claims description 3
- 229920006113 non-polar polymer Polymers 0.000 claims description 2
- 229910052736 halogen Inorganic materials 0.000 claims 1
- 150000002367 halogens Chemical class 0.000 claims 1
- 229910000000 metal hydroxide Inorganic materials 0.000 description 7
- 150000004692 metal hydroxides Chemical class 0.000 description 7
- -1 polyethylene Polymers 0.000 description 7
- 239000004698 Polyethylene Substances 0.000 description 5
- 229920000573 polyethylene Polymers 0.000 description 5
- 230000007774 longterm Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 2
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 2
- 239000000347 magnesium hydroxide Substances 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 206010063493 Premature ageing Diseases 0.000 description 1
- 208000032038 Premature aging Diseases 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- RREGISFBPQOLTM-UHFFFAOYSA-N alumane;trihydrate Chemical compound O.O.O.[AlH3] RREGISFBPQOLTM-UHFFFAOYSA-N 0.000 description 1
- 229910000148 ammonium phosphate Inorganic materials 0.000 description 1
- 235000019289 ammonium phosphates Nutrition 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 229920001600 hydrophobic polymer Polymers 0.000 description 1
- DCUGZOBNIZLALZ-UHFFFAOYSA-N magnesium;dihydrate Chemical compound O.O.[Mg] DCUGZOBNIZLALZ-UHFFFAOYSA-N 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- BIKXLKXABVUSMH-UHFFFAOYSA-N trizinc;diborate Chemical class [Zn+2].[Zn+2].[Zn+2].[O-]B([O-])[O-].[O-]B([O-])[O-] BIKXLKXABVUSMH-UHFFFAOYSA-N 0.000 description 1
Images
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
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
- H01B7/2825—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable using a water impermeable sheath
Definitions
- the invention relates to a cable, in particular a cable for connecting photovoltaic modules, which is suitable for laying in damp environments or in environments in which the cable is exposed to moisture.
- the individual functional units of the cable, the electrical or optical conductor, the conductor insulation, any shielding and the cable jacket must therefore be designed in accordance with the requirements.
- the permanent exposure to moisture can also impair the insulation properties of the outer jacket and / or the insulation layer (s) inside the cable, so that fault currents, in particular leakage currents, and the associated failure of the system connected to the cable can occur.
- signal interference such as increased attenuation or crosstalk, can occur.
- the cable comprises a very thick layer of polyethylene, at least 35mm thick, which is not flame-retardant, but rather easily combustible.
- the cable is made flame-retardant by applying a thin external fire protection layer. If the thin external fire protection layer is damaged, there is a risk that the underlying polyethylene layer will be set on fire. Due to the large proportion of non-flame-retardant polyethylene in the total cable volume, a Spread fire quickly along the cable as there is a lot of combustible material available. This is a security risk.
- a cable for movable electrical loads is known.
- a powdery separating layer made of stearate or cellulose is attached between the insulated wires and the inner jacket, which ensures relative mobility between the wires and the inner jacket.
- the application of separating layers in powder form is associated with a high manufacturing cost.
- a great deal of effort must be made during production in order to avoid distribution of the powder over large areas of the production area.
- the cable is not suitable for use in a damp environment.
- the cable quickly fails in the event of a fire.
- EP 2656357 describes a cable covered with a cross-linked polyolefin layer to inhibit water diffusion.
- the present invention is therefore based on the object of creating an improved cable that can be laid in damp environments, in particular in the ground.
- the cable should be long-term resistant to moisture and water and minimize the transverse diffusion of water and moisture into the interior of the cable.
- the cable should be flame-retardant in accordance with IEC 60332-1-2.
- the cable which is particularly suitable for connecting photovoltaic modules to an energy network, comprises at least one electrical and / or at least one optical conductor, at least one insulation layer that encloses the at least one conductor, and an outer jacket that encloses the aforementioned conductor and the insulation layer encloses.
- a diffusion barrier layer is arranged between the outer jacket and the insulation layer.
- the diffusion barrier layer is designed in such a way that the transverse diffusion of water and moisture into the interior of the cable is prevented or at least significantly reduced.
- a reduction in the diffusion of water and Moisture reached by at least a factor of 100, more preferably by at least a factor of 1000, compared to a cable without a diffusion barrier layer.
- the properties of the cable can advantageously be selected by appropriately dimensioning the cable.
- the manufacturing effort and the material costs can be reduced.
- the diffusion barrier layer is thinner than the insulation layer and / or thinner than the outer jacket.
- the diffusion barrier layer preferably has a nominal thickness of at least 0.1 mm.
- the insulation layer and the outer jacket preferably have a nominal thickness of at least 0.5 mm.
- the thickness of the diffusion barrier layer, insulation layer and outer jacket is preferably matched to the cross section of the electrical conductor and increases with increasing cross-section of the electrical conductor or conductors, possibly proportional to.
- the outer jacket, diffusion barrier layer and insulation layer are preferably extrusion products. All layers are preferably manufactured on a cable extrusion line, which enables efficient production.
- the insulation layer and the diffusion barrier layer are manufactured by coextrusion in a single production step or are applied to the internal materials.
- the diffusion barrier layer and the outer jacket are manufactured by coextrusion in a single production step or are applied to the internal materials.
- the diffusion barrier layer is preferably made from a non-polar and / or hydrophobic polymer material.
- the use of a non-polar and / or hydrophobic material reduces the diffusion even through fine pores or manufacturing defects in the diffusion barrier layer due to capillary forces.
- the diffusion barrier layer is manufactured in such a way that an uninterrupted layer that is as defect-free as possible is formed.
- the polymer material for the diffusion barrier layer comprises exclusively or mainly polyolefins, in particular polyethylene, polypropylene or mixtures of polyethylene and polypropylene.
- the polymer material for the diffusion barrier layer is crosslinked, preferably by electron beam crosslinking and / or silane crosslinking. Networking improves long-term stability.
- the cable according to the invention preferably comprises at least two electrical conductors which, in a further preferred embodiment, are each surrounded by a shield. Cables according to the invention can be used in different areas for different applications. Cables according to the invention can be equipped with optical conductors or electrical conductors or a combination thereof.
- the outer jacket is flame-retardant in accordance with the IEC 60332-1-2 standard.
- flame-retardant additives preferably aluminum hydroxide, magnesium hydroxide, zinc borates, ammonium sulfate or phosphate-based materials, are added to the polymer material for the outer jacket. These additives are preferably at least largely halogen-free.
- flame-retardant or flame-retardant additives are added to the outer jacket and the inner jacket and / or the insulation layer. Even if the outer jacket is completely destroyed by the action of a flame, the inner jacket and / or the insulation layer can protect the electrical line from damage for a longer period of time. Both the flame-retardant or flame-retardant additive for the outer jacket and the flame-retardant or flame-retardant additive for the inner jacket and / or the insulation layer are preferably at least largely halogen-free.
- the outer jacket and the inner jacket and / or the insulation layer comprise different flame-retardant or flame-retardant additives.
- the inner jacket and / or the insulation layer particularly preferably comprises at least one higher quality additive, which gives better flame-retardant or flame-retardant properties than additives that are added to the outer jacket.
- Higher-quality additives, with which excellent flame-retardant or flame-retardant properties are achieved, are usually more expensive than additives with less good technical properties.
- high-quality additives are therefore added to at least one of the layers enclosed by the outer jacket, for example the inner jacket and / or further insulation layers. Due to the diffusion barrier layer, the inner jacket and / or the further insulation layers, which are provided with the higher quality additive, are better protected in the long term, so that the high quality additive and the associated high quality properties of the cable are preserved for longer.
- the use of the at least one high-quality additive in the inner jacket and / or the further insulation layer leads to a reduction in production costs compared to the use of this high-quality additive in the outer jacket.
- the outer jacket comprises aluminum trihydrate (ATH) and the inner jacket and / or the insulation layer comprise magnesium dihydrate (MDH).
- ATH aluminum trihydrate
- MDH magnesium dihydrate
- Metal hydroxides such as aluminum hydroxide or magnesium hydroxide split off water in an endothermic process in the event of a fire.
- the endothermic conversion process requires between 1000 and 1300 J / g, depending on the source of the ATH or MDH. With ATH the reaction takes place from approx. 200 ° C, with MDH from approx. 300 ° C.
- ATH is therefore often used in materials with processing temperatures below 220 ° C, while MDH is used for higher processing temperatures up to 300 ° C.
- the additive with the higher transformation temperature preferably MDH, provides the inner layers with flame protection even at higher temperatures and is supported by the outer jacket with its additives.
- Fig. 1 shows a cross section of a cable 10 according to the invention.
- An electrical conductor 1 is surrounded by a uniform insulation layer 2.
- a diffusion barrier layer 3 is applied to the insulation layer 2.
- An outer jacket 4 is applied to the diffusion barrier layer 3.
- an optical conductor 1 can be used instead of the electrical conductor 1.
- further polymer-based layers or braided shields can be arranged between the insulation layer 2 and the diffusion barrier layer 3 or between the diffusion barrier layer 3 and the outer jacket 4, which are used for shielding, for example.
- Fig. 2 shows a cross section of a cable 10 according to the invention in a further preferred embodiment.
- Several electrical or optical conductors 1 are each enclosed by an insulation layer 2.
- the insulated conductors 1 are connected to one another by an inner jacket 6 or in an inner jacket 6 adored.
- a diffusion barrier layer 3 is attached to the inner jacket 6.
- An optional shield 5 is preferably arranged between the diffusion barrier layer 3 and the outer jacket 4.
- the optional shield 5 can also be arranged between the inner jacket 6 and the diffusion barrier layer 3.
- the number of conductors 1 can be selected as required.
- the cables according to FIGS. 1 and 2 consist of inner and outer cable layers, which preferably comprise flame-retardant or flame-retardant additives that differ from one another in terms of their properties and possibly also the procurement costs.
- the outer sheath 4 forms the outermost cable layer, which preferably comprises a first flame-retardant or flame-retardant additive.
- the inner jacket 6 or the at least one insulation layer 2 preferably comprise a second flame-retardant or flame-retardant additive.
- At least one flame-retardant or flame-retardant additive can also advantageously be provided for each of the cable layers 4, 6, 2.
- the inner jacket has, for example, a second and the at least one insulation layer has a third flame-retardant or flame-retardant additive.
- the at least one first flame-retardant additive is preferably made more cost-effectively, possibly from more cost-effective materials, than the at least one second or third flame-retardant additive.
- the at least one first flame-retardant additive is subject to a conversion process at a lower temperature than the at least one second or third flame-retardant additive in the event of a fire.
- the first flame-retardant additive is preferably ATH or comprises a predominant portion of ATH and the second sludge-resistant additive is preferably MDH or comprises a predominant portion of MDH.
- the innermost layer preferably comprises a high quality metal hydroxide or metal hydroxide mixture, preferably MDH
- the middle layer a metal hydroxide mixture with a high quality first metal hydroxide, preferably MDH, and a lower quality second metal hydroxide, preferably ATH, which are preferably mixed in a ratio in the range of 40:60 to 60:40.
Landscapes
- Insulated Conductors (AREA)
Claims (8)
- Câble (10) pour le raccordement électrique de modules photovoltaïques à un réseau d'énergie, avec- au moins un conducteur électrique et/ou au moins un conducteur optique (1);- au moins une couche isolante (2) qui enserre le conducteur (1); et- une gaine extérieure (4) qui enserre le conducteur (1) et la couche isolante (2);.caractérisée en ce qu'une couche barrière de diffusion (3) est disposée entre la gaine extérieure (4) et la couche isolante (2), qui est conçu de manière à ce qu'elle prévient ou au moins réduit sensiblement la diffusion transversale d'eau et d'humidité vers l'intérieur du câble et que la couche barrière de diffusion (3) et plus mince que la couche isolante (2) et/ou que la couche barrière de diffusion (3) est plus mince que la gaine extérieure (4) et que la couche barrière de diffusion (3) et formé d'un matériau polymère non-polaire, de préférence un polyoléfine, et que le matériau polymère pour la couche barrière de diffusion (3) est réticulé et que le conducteur (1) avec la couche isolante (2) correspondante sont entourés d'une gaine intérieure et qu'au moins une couche interne ou externe du câble (10), comme la gaine extérieure (4) et la gaine intérieure (6) ou la gaine extérieure (4) et la couche isolante 2), comprennent ou moins un additif ignifuge, qui est au moins majoritairement exempt d'halogènes et que la gaine extérieure (4) est ignifuge selon la norme IEC 60332-1-2.
- Câble (10) selon la revendication 1, caractérisé en ce qu'au moins deux conducteurs optiques ou électriques (1) sont prévus, qui sont de préférence entourés conjointement par un blindage (5).
- Câble (10) selon la revendication 1 ou 2, caractérisé en ce que la gaine extérieure (4), la couche barrière de diffusion (3), la gaine intérieure (6) éventuellement présente et / ou la au moins une couche isolante (2) sont des produits d'extrusion.
- Câble (10) selon l'une des revendications 1 à 3, caractérisé en ce que la couche isolante (2), éventuellement la gaine intérieure (6), et la couche barrière de diffusion (3) sont le produit d'une étape de fabrication commune et / ou que la couche de barrière de diffusion (3) et l'enveloppe extérieure (4) sont le produit d'une étape de fabrication commune.
- Câble (10) selon la revendication 4, caractérisé en ce que la couche isolante (2), éventuellement la gaine intérieure (6), et la couche barrière de diffusion (3) sont le produit d'une coextrusion et / ou que la couche barrière de diffusion (3) et l'enveloppe extérieure (4) sont le produit d'une coextrusion.
- Câble (10) selon la revendication 5, caractérisé en ce que la couche externe et la couche interne du câble comprennent les mêmes additifs ignifuges ou en ce que la couche externe du câble comprend au moins un premier additif ignifuge et la couche interne du câble comprend au moins un deuxième additif ignifuge, les premier et second additifs ignifuges étant différent les uns des autres.
- Câble (10) selon la revendication 6, caractérisé en ce que l'au moins un premier additif ignifuge est fabriqué de manière plus rentable, de préférence à partir de matériaux moins chers, que l'au moins un second additif ignifuge et / ou que le au moins un premier additif ignifuge en cas d'incendie, a une température de conversion inférieure que l'au moins un deuxième additif ignifuge.
- Câble (10) selon la revendication 6 ou 7, caractérisé en ce que le au moins un premier additif ignifuge est constitué d'ATH ou d'une partie majoritaire d'ATH et en ce que le deuxième additif ignifuge est constitué de MDH ou d'une partie majoritaire de MDH.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES15184559T ES2873232T3 (es) | 2015-09-09 | 2015-09-09 | Cable |
EP15184559.1A EP3142125B1 (fr) | 2015-09-09 | 2015-09-09 | Cable |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP15184559.1A EP3142125B1 (fr) | 2015-09-09 | 2015-09-09 | Cable |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3142125A1 EP3142125A1 (fr) | 2017-03-15 |
EP3142125B1 true EP3142125B1 (fr) | 2021-05-05 |
Family
ID=54145593
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15184559.1A Active EP3142125B1 (fr) | 2015-09-09 | 2015-09-09 | Cable |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP3142125B1 (fr) |
ES (1) | ES2873232T3 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111816357A (zh) * | 2020-07-22 | 2020-10-23 | 昆明明超电缆有限公司 | 一种光伏电站专用电缆及其制造方法 |
CN113628795B (zh) * | 2021-08-17 | 2023-04-07 | 贵州新曙光电缆有限公司 | 一种铝导体光伏电缆 |
CN114242316A (zh) * | 2021-12-22 | 2022-03-25 | 安徽电缆股份有限公司 | 一种铝合金导电光伏电缆 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1188166A1 (fr) * | 1999-06-02 | 2002-03-20 | Tyco Electronics Corporation | Conducteur electrique isole |
US20130220666A1 (en) * | 2010-10-21 | 2013-08-29 | Borealis Ag | Cable comprising a layer which is formed of a composition containing epoxy-grouips |
EP2656357A1 (fr) * | 2010-12-23 | 2013-10-30 | Prysmian S.p.A. | Câble d'énergie à résistance diélectrique stabilisée |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19620963A1 (de) * | 1996-05-24 | 1997-11-27 | Alcatel Kabel Ag | Brandsicheres elektrisches Kabel oder brandsichere elektrische Leitung und Verfahren zur Herstellung |
DE10131569B4 (de) | 2000-08-12 | 2019-05-23 | Südkabel GmbH | Kabel mit Polyethylenmantel und Verfahren zur Herstellung eines Kabels |
DE10242254A1 (de) * | 2002-09-12 | 2004-03-25 | Nexans | Elektrisches Kabel zum Anschluß von bewegbaren elektrischen Verbrauchern |
EP2669901B1 (fr) * | 2012-06-01 | 2015-09-16 | Nexans | Câble avec indicateur d'usure |
DE102012212205A1 (de) * | 2012-07-12 | 2014-05-15 | Tyco Electronics Raychem Gmbh | Behältnis für einen elektrischen oder optischen Leiter |
-
2015
- 2015-09-09 ES ES15184559T patent/ES2873232T3/es active Active
- 2015-09-09 EP EP15184559.1A patent/EP3142125B1/fr active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1188166A1 (fr) * | 1999-06-02 | 2002-03-20 | Tyco Electronics Corporation | Conducteur electrique isole |
US20130220666A1 (en) * | 2010-10-21 | 2013-08-29 | Borealis Ag | Cable comprising a layer which is formed of a composition containing epoxy-grouips |
EP2656357A1 (fr) * | 2010-12-23 | 2013-10-30 | Prysmian S.p.A. | Câble d'énergie à résistance diélectrique stabilisée |
Also Published As
Publication number | Publication date |
---|---|
EP3142125A1 (fr) | 2017-03-15 |
ES2873232T3 (es) | 2021-11-03 |
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