①金屬屏蔽層包裹在絕緣屏蔽層外，金屬屏蔽層一般采用銅帶或銅絲，它是將電場限制在電纜內部，保護人身安全的關鍵結構。也是保護電纜免受外界電氣干擾的接地屏蔽層。JF JXF JEF電機引接線 規格 型號 價格 生產廠

(1) the metal shielding layer is wrapped outside the insulation shielding layer. The metal shielding layer usually adopts copper tape or copper wire. It is the key structure to restrict the electric field to the cable and protect the personal safety. It is also the grounding shield to protect the cable from external electrical interference.

 

②在系統發生接地或短路故障時，金屬屏蔽層是短路接地電流的通道，其截面積應根據系統短路容量、中性點接地方式計算確定，一般10kV系統計算屏蔽層截面積推薦不小于25平方毫米。JF JXF JEF電機引接線 規格 型號 價格 生產廠

(2) when the system is grounded or short circuited, the metal shield is the channel of short circuit grounding current. The sectional area should be determined according to the system short circuit capacity and neutral point grounding mode. The re...mended area of the shielding layer in general 10kV system is not less than 25 mm2.

 

③在110kV及以上電纜線路中金屬屏蔽層是由金屬護套構成，既有電場屏蔽作用還有防水密封功能，同時還兼有機械保護功能。

(3) in the 110kV and above cable lines, the metal shield is made up of metal sheath, which has the electric field shielding function and the waterproof sealing function, and also has the mechanical protection function.

 

④金屬護套的材料和結構一般采用波紋鋁護套；波紋銅護套；波紋不銹鋼護套；鉛護套等。另外有一種復合護套，是采用鋁箔貼在PVC、PE護套內的結構，在歐美的產品中使用較多。JF JXF JEF電機引接線 規格 型號 價格 生產廠

(4) the material and structure of metal sheath generally use corrugated aluminum sheath, corrugated copper sheath, corrugated stainless steel sheath, lead sheath and so on. In addition, there is a ...posite sheath, which is used in the PVC and PE sheath structure of aluminum foil, and is used more widely in Europe and America products.

 

鎧裝層

Armour layer

 

①在內襯層外纏繞有金屬鎧裝層，一般采用雙層鍍鋅鋼帶鎧裝。其作用是保護電纜內部，防止在施工、運行過程中機械外力對電纜的損傷。也兼有接地防護的作用。

(1) there are metal armour layers outside the inner lining, and the double layer galvanized steel strip is usually armored. Its function is to protect the cable internal, to prevent mechanical damage to the cable in the process of construction and operation. It also has the function of grounding protection.

 

②鎧裝層有多種結構，如鋼絲鎧裝，不銹鋼鎧裝，非金屬鎧裝等，用于特殊電纜結構。

There are many kinds of structures, such as steel wire armour, stainless steel armor, non-metal armor, etc., for special cable structure.

 

外護套

Outer sheath

 

①這是電纜最外邊的保護，一般采用聚氯乙烯（PVC）聚乙烯(PE)，都是絕緣材料，采用擠包成形。按照技術要求，一般采用的是阻燃聚氯乙烯（PVC）。適應冬季寒冷和夏季炎熱的要求，不開裂，不軟化。

This is the outermost cable protection, generally using polyvinyl chloride (PVC) polyethylene (PE), are insulated materials, the use of extrusion forming. According to technical requirements, flame retardant polyvinyl chloride (PVC) is generally used. Adapt to the cold winter and hot summer demand, not cracking, not softening.

 

②外護套主要的作用是密封防止水分侵入，保護鎧裝層不受腐蝕，防止電纜故障引發的火災擴大。

The main function of the outer sheath is to prevent water intrusion, protect the armor layer from corrosion and prevent the expansion of the fire caused by the cable failure.