Solid cable, manufacturing method thereof, and transmission line therewith

An electrical power transmission cable having predetermined dielectric characteristics, the cable comprising:

• a conductor;
• and
• an insulation layer provided on an outer circumference of said conductor, said insulation layer being impregnated with a medium viscosity insulating oil having a viscosity from 10 centistokes (cst) to less than 500 cst at 60 ° C.;
• said insulation layer comprising a composite tape, said composite tape comprising a polyolefin resin film laminated with kraft paper on both sides thereof;
• and
• said insulation layer further comprising an insulating tape, said insulating tape being a polyolefin resin film,
• wherein said composite tape and said insulating tape are wound to form said insulation layer.

An electrical power transmission cable having predetermined dielectric characteristics, the cable comprising:

• a conductor;
• and
• an insulation layer provided on an outer circumference of said conductor, said insulation layer being impregnated with a medium viscosity insulating oil having a viscosity from 10 centistokes (cst) to less than 500 cst at 60° C,
• wherein said insulating layer includes an insulating tape having a polyolefin resin film, and
• wherein said insulating oil and said polyolefin resin film each have a solubility parameter value, said insulating oil solubility parameter value being a range of ±1.5 of the solubility parameter value of said polyolefin resin film.

An electrical power transmission cable system comprising:

• a cable having predetermined dielectric characteristics, the cable including a conductor and an insulation layer provided on an outer circumference of said conductor, said insulation layer being impregnated with a medium viscosity insulating oil having a viscosity from 10 centistokes (cst) to less than 500 cst at 60° C., said cable having a submarine-portion and a land-position, said submarine-portion being adapted, constructed, and arranged such that it can be submerged under water;
• an oil stop joint box that connects said submarine-portion to said land-portion;
• and
• an oil feeding tank connected to said land-portion that feeds one of said medium viscosity insulating oil and a lower viscosity insulating oil to said land-portion.

An electrical power transmission cable having predetermined dielectric characteristics, the cable comprising:

• a conductor;
• and
• an insulation layer provided on an outer circumference of said conductor, said insulation layer being impregnated with a medium viscosity insulating oil having a viscosity from 30 centistokes (cst) to less than 500 cst at 60° C.;
• said insulation layer comprising a composite tape, said composite tape comprising a polyolefin resin film laminated with kraft paper on both sides thereof;
• and
• said insulation layer further comprising an insulating tape, said insulating tape being a polyolefin resin film,
• wherein said composite tape and said insulating tape are wound to form said insulation layer.

An electrical power transmission cable system comprising:

• a cable having predetermined dielectric characteristics, the cable including a conductor and an insulation layer provided on an outer circumference of said conductor, said insulation layer being impregnated with a medium viscosity insulating oil having a viscosity from 30 centistokes (cst) to less than 500 cst at 60° C., said cable having a submarine-portion and a land-portion, said submarine-portion being adapted, constructed, and arranged such that it can be submerged under water;
• an oil stop joint box that connects said submarine-portion to said land-portion;
• and
• an oil feeding tank connected to said land-portion that feeds one of said medium viscosity insulating oil and a lower viscosity insulating oil to said land-portion.