Overhead insulated cable Overhead cables are also very […]
Overhead insulated cable
Overhead cables are also very common for us. It is characterized by no sheath. Many people have three misconceptions about this type of cable, and the big cake is corrected here.
First, its conductor is not only aluminum, but also copper conductors (JKYJ, JKV) and aluminum alloys (JKLHYJ). There are also steel core aluminum stranded overhead cables (JKLGY).
Second, it is not only a single core, it is usually a single core, but it can also be twisted into a bundle with several conductors.
Third, the voltage level of the overhead cable is 35KV and below, not 1KV and 10KV.
This kind of cable structure is similar to power cable, which is characterized by only copper core, no aluminum core cable, smaller conductor cross section and more cores, such as 24 * 1.5, 30 * 2.5 ...
Suitable for stand-alone control or unit control of power plants, substations, mines, petrochemical enterprises, etc. with AC rated voltage 450 / 750V and below. In order to improve the ability of the control signal cable to prevent internal and external interference, shielding measures are mainly adopted.
Common models are KVV, KYJV, KYJV22, KVV22, KVVP. Model meaning: "K" control cable, "V" PVC insulation, "YJ" XLPE insulation, "V" PVC sheath, "P" copper wire shield.
As for the shielding layer, our common KVVP is copper wire shielding, if it is copper tape shielding, it means KVVP2, if it is aluminum-plastic composite tape shielding, it means KVVP3. The shielding layers of different materials have their own characteristics and functions.