Abstract: Disclosed is the present disclosure relates to a marine cable for offshore wind power having an improved water-tree property. More particularly, it relates to a marine cable for offshore wind power, which may effectively suppress formation of water trees caused by diffusion of moisture, having penetrated into cores of the cable, in insulating layers so as to improve dielectric strength and consequently secure a long lifespan.

Abstract: Provided is an ultra-high-voltage direct-current (DC) power cable. Specifically, the present invention relates to an ultra-high-voltage DC power cable capable of simultaneously preventing or minimizing electric field distortion, a decrease in DC dielectric strength, and a decrease in impulse breakdown strength due to accumulation of space charge in an insulator.

Abstract: Disclosed is an ultra-high-voltage direct-current power cable that is capable of simultaneously preventing or minimizing field enhancement and reductions in high-temperature volume resistance and direct-current dielectric strength due to accumulation of space charges in an insulator.

Abstract: Disclosed are an insulation composition that is capable of simultaneously preventing reductions in volume resistance, direct-current dielectric strength, and dielectric breakdown strength due to accumulation of space charges and in which the extent of extrusion of an insulating layer is not reduced, and a direct-current power cable having an insulating layer formed from the same.

Abstract: Provided is an insulation composition having a low dielectric constant and a cable including an insulation layer formed of the insulation composition. More particularly, the present invention relates to an insulation composition for reducing a space charge to increase superimposed impulse breakdown strength when impulse voltages overlap during application of a direct-current (DC) voltage, having a low dielectric constant, and improving impulse breakdown strength, and a cable including an insulation layer formed of the insulation composition.

Abstract: Provided is an insulation composition having a low dielectric constant and a cable including an insulation layer formed of the insulation composition. More particularly, the present invention relates to an insulation composition for reducing a space charge to increase superimposed impulse breakdown strength when impulse voltages overlap during application of a direct-current(DC) voltage, having a low dielectric constant, and improving impulse breakdown strength, and a cable including an insulation layer formed of the insulation composition.

Abstract: An apparatus for manufacturing a micro lens array, wherein lenses having various standards are easily manufactured by forming a micro lens array by adjusting a vacuum condition in a vacuum chamber. The apparatus including: a vacuum chamber including a vacuum space therein; a vacuum unit for forming a vacuum inside the vacuum chamber; an upper frame disposed inside the vacuum chamber and to which a substrate is installed on a lower surface of the upper frame; an elevator for ascending and descending the upper frame; a lower frame disposed below the upper frame; a master plate disposed on the lower frame and includes a plurality of molding grooves on an upper surface of the master plate; and a heater installed to a side of the master plate to heat up the master plate.

Abstract: An apparatus for manufacturing a micro lens array, wherein lenses having various standards are easily manufactured by forming a micro lens array by adjusting a vacuum condition in a vacuum chamber. The apparatus including: a vacuum chamber including a vacuum space therein; a vacuum unit for forming a vacuum inside the vacuum chamber; an upper frame disposed inside the vacuum chamber and to which a substrate is installed on a lower surface of the upper frame; an elevator for ascending and descending the upper frame; a lower frame disposed below the upper frame; a master plate disposed on the lower frame and includes a plurality of molding grooves on an upper surface of the master plate; and a heater installed to a side of the master plate to heat up the master plate.