What’s the armoured power cable structure?

Being a professional armoured cable supplier, we can manufacture the xlpe and pvc armoured power cable as your requirement. In fact, these armoured cable structure are similar. You can divide the swa armoured cable into seven parts.

Conductor

The xlpe  armoured cable conductor is used to transfer electric energy, commonly used materials are copper and aluminum.Generally speaking, the power cable cross-sectional area has 2.5mm, 4mm, 6mm, 10mm, 16mm, 25mm, 35mm, 50mm, 70mm, 95mm, 120mm, 150mm, 185mm, 240mm, 300mm, 400mm, 500mm, 630mm, etc. Because the armoured cable has different specifications, you need to follow the project requirements.

Conductor shield

The conductor shield is a nonmetallic layer packed on a cable conductor.Generally, there is no conductor shielding layer for 3kV and below, and medium armoured power cable of 6kV and above must have conductor shielding layer.The conductor shield of armoured cable can eliminate the potholes on the conductor surface; eliminate the pores between the conductor and the insulation; make the close contact between the xlpe armoured cable conductor and the insulation; and improve the distribution of the electric field around the conductor. Email: info@huadongswacable.com

Insulation

The main insulation of  armoured power cable has the specific function of resisting the system voltage. What’s more, in the cable life cycle, to long withstand the rated voltage and the overvoltage of system failure. So the swa armoured cable insulation material is the key to the cable quality.Commonused insulation are Polyvinyl Chloride (PVC) and Crosslinked Polyethylene(XLPE).Cross-linked polyethylene (XLPE)is now widely used, and its color is turquoise and translucent. It has stable chemical performance; good heat resistance, long-term operating temperature of 90℃; good mechanical performance, easy processing and processing. Email: info@huadongswacable.com

Insulation shield

An insulating non-metallic layer, which is also crosslinked, is semi-conductive.In fact, the insulation shield of these xlpe swa pvc armoured cable is the transition between cable insulation and grounding metal shield, make close contact, eliminate the pore between insulation and grounding conductor; eliminate the tip effect of grounding copper belt surface; and improve the distribution of electric field around the insulating surface.

Metal shield

The metal shield is wrapped outside the insulating shield, the metal shield generally uses copper belt or copper wire, it is the key structure to restrict the electric field to the cable and protect personal safety. It is also a grounding shield that protects the 240mm xlpe armoured cable from external electrical interference.

Armor layer

The armor layer is wrapped with metal armor layer outside the inner lining, generally using double galvanized steel strip armor.Even if the armoured cable sizes are different, many of them have this metal armor layer. Because its function is to protect the interior of the cable and prevent the damage of external machinery to the cable during construction and operation.Also has the function of grounding protection.The armor layer has a variety of structures, such as swa,sta, awa, ata and so on. What’s more, you can also buy unarmoure cable. Email: info@huadongswacable.com

Sheath

This is the outermost protection of the cable, generally use PVC (PVC) polyethylene (PE), are insulation materials.According to the technical requirements, flame-retardant PVC (PVC) is generally used. Adapto the requirements of cold winter and hot summer, without cracking or softening.The main function of the copper armoured cable outer sheath is to seal to prevent moisture invasion, protect the armor layer from corrosion, and prevent the fire expansion caused by cable failure.