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Part of the high voltage cable from inside to outside including: conductor, insulation, inner sheath, filling material (armored), external insulation. Armoured high voltage cable is mainly used for ground, of course, to resist the oppression of high strength on the ground, also can prevent damage of other external forces.
The product is fit for ac rated voltage up to and including 35 kv for transmission and distribution can be fixed Ao set line, cable conductor of the highest working temperature is 90 degrees for a long time, when the short circuit (the longest time not more than 5 s), the highest temperature the cable conductor does not exceed 250 degrees.
Due to the cable cable against the breakdown caused by thermal expansion. Crosslinking cable load is high, the wire core temperature, cable thermal expansion, at the top of the cable tunnel a bend in the bracket on the facade, heavy load for a long time running cable creep strength is very big, lead to support elevation crushed cable outer sheath, metallic sheath, into cable insulation layer result in cable breakdown.