Embodiments of the present disclosure relate to a power equipment and method for providing the same. Embodiments of the present disclosure relate to a power equipment. The power equipment includes a high voltage part, a low voltage part, and an insulation oil adapted to impregnate the high voltage part and insulate the high voltage part from the low voltage part. The insulation oil is partially filled with polymer particles with a lower thermal expansion coefficient than the insulation oil. According to embodiments of the present disclosure, the degree of expansion of the insulation medium can be reduced in a cost-effective way

Embodiments of the present disclosure relate to a power equipment and method for providing the same. Embodiments of the present disclosure relate to a power equipment. The power equipment includes a high voltage part, a low voltage part, and an insulation oil adapted to impregnate the high voltage part and insulate the high voltage part from the low voltage part. The insulation oil is partially filled with polymer particles with a lower thermal expansion coefficient than the insulation oil. According to embodiments of the present disclosure, the degree of expansion of the insulation medium can be reduced in a cost-effective way

A power cable includes a conductor, an inner semi-conductive layer covering the conductor, an insulating layer covering the inner semi-conductive layer and impregnated with insulating oil, an outer semi-conductive layer covering the insulating layer, a metal sheath layer covering the outer semi-conductive layer, and a cable protection layer covering the metal sheath layer. A minimum thickness t1 of a certain cross section of the metal sheath layer is less than or equal to 90% of a maximum thickness t2 thereof.

A power cable includes a conductor, an inner semi-conductive layer covering the conductor, an insulating layer covering the inner semi-conductive layer and impregnated with insulating oil, an outer semi-conductive layer covering the insulating layer, a metal sheath layer covering the outer semi-conductive layer, and a cable protection layer covering the metal sheath layer. A minimum thickness t1 of a certain cross section of the metal sheath layer is less than or equal to 90% of a maximum thickness t2 thereof.

An isolator includes a first fluid-carrying member and a second fluid-carrying member spaced apart from the first fluid-carrying member; and a resistive, semi-conductive or non-conductive component located between the first and the second fluid-carrying member. The component is adapted to convey fluid flowing from the first fluid-carrying member to the second fluid-carrying member. The isolator further comprises a reinforcing composite encircling the first fluid-carrying member, the second fluid-carrying member and the component. The reinforcing composite comprises: first fibres extending at an angle of between 30 degrees and +30 degrees to a longitudinal axis (A-A) of the resistive, semi-conductive or non-conductive component; second fibres interwoven with the first fibres and extending around the first fluid-carrying member, the second fluid-carrying member and the component at an angle of between +60 degrees and +90 degrees and/or between 60 degrees and 90 degrees to the longitudinal axis (A-A); and a resin.

An isolator includes a first fluid-carrying member and a second fluid-carrying member spaced apart from the first fluid-carrying member; and a resistive, semi-conductive or non-conductive component located between the first and the second fluid-carrying member. The component is adapted to convey fluid flowing from the first fluid-carrying member to the second fluid-carrying member. The isolator further comprises a reinforcing composite encircling the first fluid-carrying member, the second fluid-carrying member and the component. The reinforcing composite comprises: first fibres extending at an angle of between 30 degrees and +30 degrees to a longitudinal axis (A-A) of the resistive, semi-conductive or non-conductive component; second fibres interwoven with the first fibres and extending around the first fluid-carrying member, the second fluid-carrying member and the component at an angle of between +60 degrees and +90 degrees and/or between 60 degrees and 90 degrees to the longitudinal axis (A-A); and a resin.

Provided is a power cable, particularly, an ultra-high voltage underground or submarine cable for long-distance direct-current transmission. More specifically, the present invention relates to a power cable, in which an insulating layer has high dielectric strength, an electric field applied to the insulating layer is effectively reduced, and particularly, a void is suppressed from occurring in the insulating layer due to contraction of insulating oil, caused by a decrease of temperature in the insulating layer under a low-temperature condition or when the supply of an electric current is stopped, thereby effectively suppressing partial discharge, dielectric breakdown, etc. due to an electric field concentrated in the void.

Provided is a power cable, particularly, an ultra-high voltage underground or submarine cable for long-distance direct-current transmission. More specifically, the present invention relates to a power cable, in which an insulating layer has high dielectric strength, an electric field applied to the insulating layer is effectively reduced, and particularly, a void is suppressed from occurring in the insulating layer due to contraction of insulating oil, caused by a decrease of temperature in the insulating layer under a low-temperature condition or when the supply of an electric current is stopped, thereby effectively suppressing partial discharge, dielectric breakdown, etc. due to an electric field concentrated in the void.

Disclosed are an insulated pipe and an insulated bushing. The insulated bushing (1000) includes: an insulator (110) including an intermediate shed member (112), and a lower flange (114) arranged on a lower end of the shed member; a head member (120) connected to an upper end of the insulator, wherein the head member includes an oil conservator (121) connected to the upper end of the insulator and a connecting terminal (122) connected to the oil conservator; and an insulated pipe (100) connected to the lower flange, wherein the insulated pipe includes a upper transformer pipe (101) and a lower oil-immersed pipe (102), and the transformer pipe includes an inner pipe (103), and a conductive layer arranged outside the inner pipe and configured to be grounded. The insulated pipe and the insulated bushing solve the problems of connection and sealing, and save material cost greatly.

Disclosed are an insulated pipe and an insulated bushing. The insulated bushing (1000) includes: an insulator (110) including an intermediate shed member (112), and a lower flange (114) arranged on a lower end of the shed member; a head member (120) connected to an upper end of the insulator, wherein the head member includes an oil conservator (121) connected to the upper end of the insulator and a connecting terminal (122) connected to the oil conservator; and an insulated pipe (100) connected to the lower flange, wherein the insulated pipe includes a upper transformer pipe (101) and a lower oil-immersed pipe (102), and the transformer pipe includes an inner pipe (103), and a conductive layer arranged outside the inner pipe and configured to be grounded. The insulated pipe and the insulated bushing solve the problems of connection and sealing, and save material cost greatly.