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News > Dynamic industry > XLPE cable introduction

XLPE cable introduction

XLPE cables usually refers to cable insulation using crosslinked material. The most commonly used material for the cross-linked polyethylene (XLPE). At present, the production process of the cable industry XLPE cables into three categories.
XLPE cables usually refers to cable insulation using crosslinked material. The most commonly used material for the cross-linked polyethylene (XLPE). The crosslinking process is a linear molecular structure of polyethylene (PE) by means of a specific way of processing the material to form a cross-linked polyethylene mesh size sub-line structure. Making long-term allowable working temperature increased from 70 ℃ to 90 ℃ (or higher), short allowable temperature increased from 140 ℃ to 250 ℃ (or higher), while maintaining its original premise excellent electrical performance, greatly improved The actual performance.
At present, the production process of the cable industry XLPE cables into three categories: the first category peroxide crosslinking chemistry, including saturated vapor crosslinking, crosslinking inert gas, molten salt crosslinked silicone crosslinking, have adopted domestic The second method is dry chemical crosslinking; second silane chemically crosslinked; the third category radiation crosslinking.
Inert gas
Peroxy compounds using a crosslinking agent is added polyethylene insulation, completed by three co-extruded conductor shield - insulation - extruded insulation shield layer, continuous evenly through full temperature, high pressure nitrogen seal crosslinked tube to complete the cross-linking process. Heat transfer media for nitrogen (inert gas), cross-linked polyethylene excellent electrical properties, the production range up to 500KV class.
Silane chemistry
Using a silane coupling agent is added polyethylene insulation, extruded way through the completion of the 1 + 2 variant shield - insulation - extruded insulation shield, would have been insulated wire transfer to a plate to cool the core immersed in 85- of crosslinked 95 ℃ in hot water, because the influence of the insulating layer is wet cross-linking of the water content. Usually only up to the maximum voltage rating 10KV.

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