NO771062L - PLASTIC INSULATED STRONG POWER CABLE PREFERREDLY FOR PLACEMENT IN WATER - Google Patents
PLASTIC INSULATED STRONG POWER CABLE PREFERREDLY FOR PLACEMENT IN WATERInfo
- Publication number
- NO771062L NO771062L NO771062A NO771062A NO771062L NO 771062 L NO771062 L NO 771062L NO 771062 A NO771062 A NO 771062A NO 771062 A NO771062 A NO 771062A NO 771062 L NO771062 L NO 771062L
- Authority
- NO
- Norway
- Prior art keywords
- semi
- conductive layer
- plastic
- cable according
- metal bands
- Prior art date
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 12
- 229920003023 plastic Polymers 0.000 title claims description 9
- 239000004033 plastic Substances 0.000 title claims description 9
- 239000004020 conductor Substances 0.000 claims description 19
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 12
- 229910052802 copper Inorganic materials 0.000 claims description 11
- 239000010949 copper Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 10
- 238000009413 insulation Methods 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 239000004698 Polyethylene Substances 0.000 claims description 6
- -1 polyethylene Polymers 0.000 claims description 6
- 229920000573 polyethylene Polymers 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 239000010439 graphite Substances 0.000 claims description 4
- 229910002804 graphite Inorganic materials 0.000 claims description 4
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 4
- 239000004800 polyvinyl chloride Substances 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 2
- 229920002367 Polyisobutene Polymers 0.000 claims 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims 1
- 239000011810 insulating material Substances 0.000 claims 1
- 230000007797 corrosion Effects 0.000 description 8
- 238000005260 corrosion Methods 0.000 description 8
- 230000000149 penetrating effect Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
- H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
Landscapes
- Insulated Conductors (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
Description
Foreliggende oppfinnelse vedrorer en plastisolert sterkstromskabel, fortrinnsvis beregnet på anbringelse i vann omfattende innenfra og ut regnet en kjerne bestående av en fortrinnsvis flertrådet leder omgitt av et halvledénde sjikt og en plastisolering, et utenpå kjernen lagt halvledénde sjikt, og en på det halvledénde sjiktet' påfort skjermleder samt en ytre plastmantel. The present invention relates to a plastic-insulated high-current cable, preferably intended for installation in water comprising, from the inside out, a core consisting of a preferably multi-stranded conductor surrounded by a semi-conductive layer and a plastic insulation, a semi-conductive layer laid on the outside of the core, and a 'continuing' on the semi-conductive layer screen conductor as well as an outer plastic jacket.
I kabler av ovenfor nevnte type består skjermlederen som regel av tynne kobbertråder glissent spunnet i spiral rundt kjernen med-en for formålet passende stigning. For i elektrisk henseende å forbinde kobbertrådene innbyrdes er utenpå disse et kobberbånd viklet i motsatt retning slik at det krysser kobbertrådene. Skjerm-lederens. oppgave er dersom kabelen utsettes for beskadigelse å tilveiebringe jordfeilsutlosning og å utgjore beskyttelse mot personfare. In cables of the above-mentioned type, the screen conductor usually consists of thin copper wires twisted in a spiral around the core with a pitch suitable for the purpose. In order to electrically connect the copper wires to each other, a copper strip is wound in the opposite direction on top of these so that it crosses the copper wires. Screen manager's. task is, if the cable is exposed to damage, to provide earth fault tripping and to provide protection against personal danger.
Det har vist seg vanskelig å tilvirke og anbringe en plastisolert kabel uten noe sted å få en utetthet i mantelen. Ved uhdersokelse av skadede kabler, som har vært anbragt i vann eller i vannrik mark, er en kraftig korrosjon på skjermlederen blitt konstatert, hvilken korrosjon er forårsaket av inntrengende vann. Korro-sjonen har vært særlig vanskelig på kabler, som har vært anbragt i saltvann og den har angrepet kobbertrådene alvorligst der de It has proven difficult to manufacture and place a plastic-insulated cable without somewhere to get a leak in the jacket. When examining damaged cables, which have been placed in water or in water-rich ground, severe corrosion on the screen conductor has been ascertained, which corrosion is caused by penetrating water. The corrosion has been particularly difficult on cables that have been placed in salt water and it has attacked the copper wires most seriously where they
har vært i beroring med kobberbåndet, hvilket viser at det har forekommet•to ulike slag korrosjon, delvis en galvanisk korrosjon forårsaket av det galvaniske elementet "halvleder -kobber-vann" og delvis en spaltekorrosjon mellom kobberbåndet og kobbertrådene. has been in contact with the copper strip, which shows that two different types of corrosion have occurred, partly a galvanic corrosion caused by the galvanic element "semiconductor-copper-water" and partly a crevice corrosion between the copper strip and the copper wires.
Formålet med oppfinnelsen er å tilveiebringe én kabel, ved hvilken såvel det galvaniske elementet som spalten mellom bånd og tråder elimineres. Ifolge oppfinnelsen oppnås dette med en kabel utformet The purpose of the invention is to provide one cable, by which both the galvanic element and the gap between tape and wires are eliminated. According to the invention, this is achieved with a cable designed
I IN
i overensstemmelse med etterfolgende krav.in accordance with the following requirements.
En utforelsesform av oppfinnelsen, skal nærmere beskrives under henvisning til vedlagte tegning der An embodiment of the invention shall be described in more detail with reference to the attached drawing
fig. 1 viser en sterkstromskabel i tverrsnitt ogfig. 1 shows a high current cable in cross section and
fig. 2 viser et parti av en leder i sideriss med delvis avskallet mantel. fig. 2 shows a part of a conductor in side view with a partially stripped sheath.
I fig. 1 betegnes en av mange tråder sammensatt leder med 1 og et halvledénde sjikt som omgir lederen med 2. Lederen log det halvledénde sjiktet 2 er omsluttet av en plastisolering.3 In fig. 1, a conductor composed of many strands is denoted by 1 and a semi-conducting layer that surrounds the conductor by 2. The conductor and the semi-conducting layer 2 are surrounded by a plastic insulation.3
bestående av polyvinylklorid, polyetylen eller lignende materiale, hvilken'isolering i sin tur er omgitt av et halvledénde sjikt 4 vanligvis av samme materiale som isoleringen men med en innbland-ing av grafitt. Den vanligste metoden for påforing av såvel isolering som halvledersjikt er strengsproytning, men når det gjelder det ytre halvledersjiktet kan dette også påfores i form av tynne bånd som vikles rundt isoleringen eller i form av grafittblandet farge. Rundt det ytre halvledénde sjiktet 4 ligger en skjermleder i form av spiralformet spunnede tynne metallbånd 5 passende fremstilt ved flatvalsing av rundtråd. Metallbåndene er blitt anbragt på en måte, som gjor.at de hefter vel. til .det halvledénde sjiktet. Gjelder det påforing på et sproytet sjikt kan dette gjores mens sjiktet fremdeles er varmt og adhesivt. Ved på annen måte påforte sjikt tilveiebringes védheftingen ved hjelp av et for formålet passende adhesjonsmiddel. consisting of polyvinyl chloride, polyethylene or similar material, which insulation is in turn surrounded by a semi-conducting layer 4 usually of the same material as the insulation but with an admixture of graphite. The most common method for applying both insulation and semiconductor layer is string spraying, but when it comes to the outer semiconductor layer, this can also be applied in the form of thin bands that are wrapped around the insulation or in the form of graphite-mixed colour. Around the outer semi-conductive layer 4 is a screen conductor in the form of spirally spun thin metal strips 5 suitably produced by flat rolling of round wire. The metal bands have been placed in a way that ensures that they adhere well. to .the semiconducting layer. If it applies to application on a sprayed layer, this can be done while the layer is still hot and adhesive. In the case of layers applied in other ways, the adhesion is provided by means of an adhesion agent suitable for the purpose.
I mellomrommene mellom skjermbåndene 5 er, som det også vises i fig. 2, utfyllinger 6 blitt påfort bestående av en plast eller en masse som vel hefter til såvel det halvledénde sjiktet 4 som skjermbåndet 5. Utfyllingen tilslutter seg dessuten til mantelen 7 som om-slutter, hele kabelen, hvilken mantel er fremstilt av polyvinylklorid, polyeten eller lignende materiale. Ved at utfyllingene 6 er vel heftende til såvel det halvledénde sjiktet 4 som skjermbåndet 5 elimineres det galvaniske elementet skjermleder-halvleder-vann": ettersom eventuelt inntrengende vann kun kommer i beroring med skjermlederne og utfyllingene. Ved at.skjermlederne hefter vel til det halvledénde sjiktet er det tilfredsstillende sorget for den innbyrdes elektriske forbindelsen mellom de av skjérmlederen omfattede bånd. Herved blir den ved. kjente kabelkonstruksjoner anvendte motspiralen unodig og spaltekorrosjon unngås. In the spaces between the screen bands 5, as is also shown in fig. 2, fillings 6 have been applied consisting of a plastic or a mass that adheres well to both the semiconducting layer 4 and the shield tape 5. The filling also connects to the jacket 7 which encloses the entire cable, which jacket is made of polyvinyl chloride, polyethylene or similar material. By the fact that the fillings 6 adhere well to both the semiconducting layer 4 and the shield tape 5, the galvanic element screen conductor-semiconductor-water is eliminated", as any penetrating water only comes into contact with the screen conductors and the fillings. By the fact that the screen conductors adhere well to the semiconducting layer is the satisfactory care for the mutual electrical connection between the bands encompassed by the screen conductor.This makes the counter-spiral used in known cable constructions unnecessary and crevice corrosion is avoided.
Ved at galvanisk korrosjon er blitt eliminert i kabler utformet ifolge foreliggende oppfinnelse blir det mulig å anvende andre materialer i skjérmlederen, f.eks. saltvannsbestandige aluminiums-legeringer eller fortinnet kobber. Valget av materiale i skjérmlederen kan nå gjores med hensyn kun til de korrosive egenskapene hos eventuellt inntrengende vann, dvs. utelukkende med hensyn til kabelanbringelsen. Således burde ved anbringelse i jord, fersk-vann og brakk bstersjovann en saltvannsbestandig aluminiumslegering gi betryggende levetid for skjérmlederen, ettersom ved anbringelse i saltvann med relativt hoye saltinnhold fortinnet kobber-tråd antas å være det beste alternativet. As galvanic corrosion has been eliminated in cables designed according to the present invention, it becomes possible to use other materials in the shield conductor, e.g. saltwater-resistant aluminum alloys or tinned copper. The choice of material in the screen conductor can now be made with regard only to the corrosive properties of any intruding water, i.e. solely with regard to the cable placement. Thus, when placed in soil, fresh water and brackish brackish water, a saltwater-resistant aluminum alloy should provide a reassuring lifetime for the screen conductor, as when placed in saltwater with relatively high salt content, tinned copper wire is believed to be the best alternative.
Claims (6)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE7603688A SE7603688L (en) | 1976-03-26 | 1976-03-26 | PLASTIC INSULATED STRONG POWER CABLE PREFERABLY FOR LAYING IN WATER |
Publications (1)
Publication Number | Publication Date |
---|---|
NO771062L true NO771062L (en) | 1977-09-27 |
Family
ID=20327403
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO771062A NO771062L (en) | 1976-03-26 | 1977-03-25 | PLASTIC INSULATED STRONG POWER CABLE PREFERREDLY FOR PLACEMENT IN WATER |
Country Status (6)
Country | Link |
---|---|
AU (1) | AU2301377A (en) |
BR (1) | BR7701760A (en) |
DK (1) | DK132377A (en) |
FI (1) | FI770818A (en) |
NO (1) | NO771062L (en) |
SE (1) | SE7603688L (en) |
-
1976
- 1976-03-26 SE SE7603688A patent/SE7603688L/en unknown
-
1977
- 1977-03-08 AU AU23013/77A patent/AU2301377A/en not_active Expired
- 1977-03-15 FI FI770818A patent/FI770818A/fi not_active Application Discontinuation
- 1977-03-22 BR BR7701760A patent/BR7701760A/en unknown
- 1977-03-25 NO NO771062A patent/NO771062L/en unknown
- 1977-03-25 DK DK132377A patent/DK132377A/en unknown
Also Published As
Publication number | Publication date |
---|---|
SE7603688L (en) | 1977-09-27 |
AU2301377A (en) | 1978-09-14 |
BR7701760A (en) | 1978-01-17 |
FI770818A (en) | 1977-09-27 |
DK132377A (en) | 1977-09-27 |
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