EP3834262A1 - Revêtement isolant pour applications d'équipement immergé - Google Patents
Revêtement isolant pour applications d'équipement immergéInfo
- 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
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
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)
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 |
-
2019
- 2019-01-30 CN CN201980072914.XA patent/CN113228438B/zh active Active
- 2019-01-30 WO PCT/EP2019/052239 patent/WO2020156654A1/fr unknown
- 2019-01-30 JP JP2021536683A patent/JP7230212B2/ja active Active
- 2019-01-30 EP EP19703963.9A patent/EP3834262A1/fr active Pending
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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