EP3834262A1 - Revêtement isolant pour applications d'équipement immergé - Google Patents

Revêtement isolant pour applications d'équipement immergé

Info

Publication number
EP3834262A1
EP3834262A1 EP19703963.9A EP19703963A EP3834262A1 EP 3834262 A1 EP3834262 A1 EP 3834262A1 EP 19703963 A EP19703963 A EP 19703963A EP 3834262 A1 EP3834262 A1 EP 3834262A1
Authority
EP
European Patent Office
Prior art keywords
sleeve
preform
composite material
particulate filler
mould cavity
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.)
Pending
Application number
EP19703963.9A
Other languages
German (de)
English (en)
Inventor
Ian Watson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HMN Technologies Co Ltd
Original Assignee
Huawei Marine Networks Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Huawei Marine Networks Co Ltd filed Critical Huawei Marine Networks Co Ltd
Publication of EP3834262A1 publication Critical patent/EP3834262A1/fr
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
    • H02G3/0462—Tubings, i.e. having a closed section
    • H02G3/0481—Tubings, i.e. having a closed section with a circular cross-section
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00—Cable fittings
    • H02G15/08—Cable junctions
    • H02G15/10—Cable junctions protected by boxes, e.g. by distribution, connection or junction boxes
    • H02G15/12—Cable junctions protected by boxes, e.g. by distribution, connection or junction boxes for incorporating transformers, loading coils or amplifiers
    • H02G15/14—Cable junctions protected by boxes, e.g. by distribution, connection or junction boxes for incorporating transformers, loading coils or amplifiers specially adapted for submarine cables
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00—Cable fittings
    • H02G15/08—Cable junctions
    • H02G15/18—Cable junctions protected by sleeves, e.g. for communication cable

Definitions

  • the ratio of the particulate filler material to the elastomeric matrix material may be selected such that the thermal conductivity of the composite material is at least 1 W/mK and the dielectric strength of the composite material is at least 80 KV/mm.
  • the resulting sleeve may provide dual functionality, acting as both a high voltage DC electrical insulator and resulting in a reduced thermal gradient between the internal electronics assembly and the outer repeater housing over a service life of 25 years.
  • the amount of particulate filler material may be less than or equal to 45 percent (%) by weight of the composite material. This ratio of components has been shown to result in particularly good properties.
  • the sleeve may be fabricated using compression moulding. Using compression moulding to produce the sleeve may result in improved distribution of filler material in the composite.
  • the submerged equipment may be or comprise a submarine telecommunications amplifier, switch, multiplexer or demultiplexer. Therefore, the sleeve is compatible for use with a variety of wet plant. For example, submarine repeaters, branching units and reconfigurable optical add-drop multiplexers (ROADM).
  • ROADM reconfigurable optical add-drop multiplexers
  • the thermal conductivity of the composite material may be at least 1.5 W/mK.
  • the dielectric strength of the composite material may be at least 90 KV/mm.
  • the method may further comprise applying heat simultaneously with the pressure to plastically deform the preform to form the sleeve. This may allow for more efficient deformation of the preform.
  • Figures 4(a)-(d) show schematic illustrations of combinations of good and bad dispersion and distribution of filler particles in a matrix material.
  • Figure 5 shows an example of a method for forming a sleeve.
  • the elastomeric matrix material is a silicone elastomer and the particulate filler material is boron nitride.
  • the filler material may be a particulate ceramic or refractory material.
  • the filler material is dispersed in the elastomeric matrix.
  • the matrix material forms the body of the sleeve element.
  • the matrix material may be substantially continuously interconnected throughout the sleeve element.
  • the matrix material may comprise greater than 50%, greater than 70% or greater than 80% by volume of the sleeve element.
  • the ratio of the particulate filler material to the elastomeric matrix material is preferably selected such that the thermal conductivity of the composite material is at least 1 W/mK and the dielectric strength of the composite material is at least 80 KV/mm.
  • the amount of boron nitride filler is equal to 45% by weight of the composite material.
  • empirical testing has shown that the dielectric strength of the composite material is increased from 20KV DC/mm for LDPE to approximately 100KV DC/mm for the 45% BN filled elastomer when uniformly dispersed and distributed within the elastomer.
  • the thermal conductivity is increased from 0.3 W/mK for LDPE to greater than 1.6 W/mK and is achievable without detrimental effect to the high voltage insulation properties of the material. Therefore, the filled elastomer has been shown to provide electrical insulating properties similar to polyethylene whilst providing a much higher thermal conductivity.
  • the composite material is applied as a single piece thin walled sleeve over the entire electronics assembly to provide a dual function, operating as both a high voltage DC electrical insulator exposed to a constant electrical field, whilst also providing a reduced thermal gradient between the internal electronics assembly.
  • the long-term outgassing of hydrogen or any other degradation products from the composite material has also been quantified by accelerated testing to confirm that there is no adverse impact on any aspect of reliability over the system lifetime.
  • T.V N C (1 ) where C is a constant for a given material.
  • Figure 2 An example is shown in Figure 2 for a 45% BN filled silicone elastomer.
  • an“N” value of 4.75 is adopted within the submarine equipment and cable industry to predict the life of the polymer mouldings when exposed to an any applied voltage.
  • a convenient method for forming the sleeve is by compression moulding.
  • Figure 3 shows an example of such a manufacturing method for producing the sleeve described herein.
  • Figures 4(a)-(d) show the difference between materials with good and bad dispersion and/or good and bad distribution.
  • compression moulding it is possible to ensure good dispersion and good distribution of the boron nitride filler, as illustrated in Figure 4(d), as this is achieved at the sheet milling phase.
  • Unwanted turbulent disruption of the filler distribution within sleeve moulding is limited as the tool cavity is already 90% full prior to pressure being applied and so material has little distance to move.
  • Figure 5 summarises an example of a method of manufacturing the sleeve.
  • the method comprises placing a preform of the composite material into a mould cavity. The method then moves on to step 502, where pressure is applied to the preform to plastically deform the preform to form the sleeve.
  • This method provides for the ability to manufacture a dimensionally adaptable single piece thin walled compliant sleeve using a 45% boron nitride filled silicone elastomer which is able to cover the whole electronics module within a submerged repeater.
  • the resulting sleeve provides dual functionality, acting as both a high voltage DC electrical insulator and resulting in a reduced thermal gradient between the internal electronics assembly and the outer repeater housing over a service life of 25 years.
  • this material can reduce the steady state operating temperature of critical components within the repeater for a given power dissipation whilst allowing operation at increased higher system voltages with improved HV ageing / life characteristics and reliability.
  • Another potential advantage is the increased contact area provided by the sleeve.
  • the use of a silicone elastomer can provide a compliant interface between the both outer pressure sleeve and the internal electronics module removing the risk of air gaps due to material hardness or dimensional mismatch of mating components. Compression set of the material is limited over the operating and storage temperature ranges of the submerged equipment, ensuring the electronics module remains in contact with the insulation over its service life.
  • Such an elastomeric interface is much more tolerant of radial contraction of the outer pressure sleeve when used in deep water applications up to 8000m.
  • Simulations have suggested that the materials described above for the sleeve can in at least some applications provide significant advantages. For example, undersea communications housings are typically installed and then left in situ for a number of years, potentially whilst operating at relatively high voltages and continuous operation. Simulations have suggested that the materials described above can provide a barrier for components operating at relatively high voltages (e.g. greater than 400V) over a service life of 25 years.
  • relatively high voltages e.g. greater than 400V
  • the N value is typically 7.6 for a 45% BN filled silicone elastomer

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Insulating Bodies (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Cable Accessories (AREA)
  • Casings For Electric Apparatus (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Electric Cable Installation (AREA)
  • Details Of Indoor Wiring (AREA)

Abstract

L'invention concerne un manchon fournissant une barrière entre des unités électroniques internes d'un équipement immergé et un boîtier externe de l'équipement immergé, le manchon étant composé d'un matériau composite comprenant un matériau de matrice élastomère et un matériau de charge particulaire.
EP19703963.9A 2019-01-30 2019-01-30 Revêtement isolant pour applications d'équipement immergé Pending EP3834262A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2019/052239 WO2020156654A1 (fr) 2019-01-30 2019-01-30 Revêtement isolant pour applications d'équipement immergé

Publications (1)

Publication Number Publication Date
EP3834262A1 true EP3834262A1 (fr) 2021-06-16

Family

ID=65352002

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19703963.9A Pending EP3834262A1 (fr) 2019-01-30 2019-01-30 Revêtement isolant pour applications d'équipement immergé

Country Status (4)

Country Link
EP (1) EP3834262A1 (fr)
JP (1) JP7230212B2 (fr)
CN (1) CN113228438B (fr)
WO (1) WO2020156654A1 (fr)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07157664A (ja) * 1993-12-03 1995-06-20 Fuji Kobunshi Kogyo Kk 熱伝導性シリコーンゴムシート及びその製造方法
FR2761830B1 (fr) * 1997-04-07 2000-01-28 Pirelli Cables Sa Support de jonction a extraction autonome commandee
US6434317B1 (en) * 2000-11-13 2002-08-13 General Dynamics Advanced Technology Systems, Inc. Pressure vessel assembly
WO2003030203A1 (fr) * 2001-10-03 2003-04-10 Corvis Corporation Boitier de repeteur pour systeme de communication optique sous-marin
CN101253582B (zh) * 2005-06-07 2011-06-29 Abb研究有限公司 套管、使用该套管的高压/中压设备及制造该套管的方法
JP5456521B2 (ja) * 2010-03-08 2014-04-02 住友電気工業株式会社 定着用ベルト
JP5210463B2 (ja) * 2010-04-28 2013-06-12 株式会社オートネットワーク技術研究所 ワイヤーハーネスの製造方法
WO2016000735A1 (fr) * 2014-06-30 2016-01-07 Abb Technology Ltd Câble de transmission d'énergie électrique
DK3148027T3 (da) * 2015-09-25 2020-03-23 Abb Schweiz Ag Kabelforskruning til forbindelse af et højspændingskabel til en højspændingskomponent
GB2551575A (en) 2016-06-24 2017-12-27 Bentley Motors Ltd Virtual footrest apparatus

Also Published As

Publication number Publication date
JP2022515252A (ja) 2022-02-17
CN113228438B (zh) 2023-04-14
CN113228438A (zh) 2021-08-06
JP7230212B2 (ja) 2023-02-28
WO2020156654A1 (fr) 2020-08-06

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