Power cables are mainly used for power transmission and distribution purpose. It is an assembly of one or more individually insulated electrical conductors, usually held together with an overall sheath. The assembly is used for transmission and distribution of electrical power. Electrical power cables may be installed as permanent wiring within buildings, buried in the ground and run overhead or exposed.……Including: rubber cable, welding cable, URD cable, XLPE insulated power calbe etc.
Bare Overhead Conductors are used in overhead transmission and distribution network applications.They are also used for un-insulated hook ups, jumpers, grounding conductors and other applications. Our Conductors conform to ASTM, IEC, BS, BS EN and DIN standards.…… Including: AAC conductor, AAAC conductor, ACSR conductor, ACAR conductor, AACSR conductor, etc.
Aerial bundled cables (also aerial bundled conductors or simply ABC) are overhead power lines using several insulated phase conductors bundled tightly together, usually with a bare neutral conductor. Our abc calbe conform to ASTM, IEC, SANS standards.……Including: abc cables, cvered line wire, service drop wire etc.
The basic structure of the guide cable:
1. conductor
Leader cable is used for fixed laying, usually according to the first or second kinds of copper conductor structure. According to user requirements and specifications, scope of section is approximately 0.75 mm2 to 2.5 mm2, usually consists of 7 single copper wire twisted, also can use single copper, the diameter is approximately 0.9 mm to 1.38 mm.
2. insulation
Lead cable initial development using polyethylene insulated, later developed XLPE insulation, because the latter life index and reliability are higher than the former, especially nuclear power plants, most of the cross-linked polyethylene. As for the insulation thickness, the thickness of insulation can be slightly larger than the corresponding 0.6/1 kV power cable, power cable nominal insulation thickness is 0.7 mm, leader cable insulation thickness is 0.8 mm to 1 mm, the reason is that the voltage test index of pilot cable is higher than 0.6/1 kV power cable standard.
3. cell shield
Most cases do not require unit shielded, adding a layer of polyester film insulation tape to the outside of the line, If the user requires a shield unit, usually built by wrapping a layer of aluminum polyester composite film with aluminum level should be added, longitudinal lead wire (wire harness), unit shield add around a layer of polyester film insulation (built around package).
4. cabling
The number or the number of cables is determined by the supply and demand sides according to the enterprise standard, and the cable working procedure is the same as the general cable.
5. inner sheath
The inner sheath needs to withstand voltage test, which can be made of natural polyethylene, the thickness is 2mm.
6. total shield
There are currently three types of total shielding:
(1) lead sheath
In order to prevent the deformation of inner sheath, the inner sheath should be wrapped around the insulation layer, and the thickness of lead layer is 2 mm or more. The lead is soft, unable to bear external mechanical forces, should have the armor layer.
(2) aluminum stranded layer
The inner sheath of closely spaced stranding a layer of aluminum, this structure generally does not need armor.
(3) aluminum casing
General use of aluminum tape longitudinal TIG welding structure, aluminum sleeve need corrugated to bend, generally do not need armor.
7. armored
On the principle of structure can be set by armored shield standard, using single steel wire armour is better, if the user has resistance requirements, can be made of steel wire and copper wire armouring hybrid, its purpose is to increase the conductivity and contribute to the guidance function.
8. outer sheath
Generally adopt polyvinyl chloride or high density polyethylene, but also the user has requested the use of thermoplastic low smoke zero halogen polyolefin.
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