Industry Information

Waterproof cable and ordinary cable difference


I believe everyone should be clear about the cable!  It's a wire that carries electricity.  Cable material is key, and you can see at ordinary times the cable is usually at the time of power generation, the need to use electricity, but the material of the cable are good, and now the cable already reach home, so the home is using the cable, cable is generally divided into waterproof cable and cable,  So you must want to understand the difference between the two kinds of cable, next xiaobian will give you a detailed introduction!  


The difference between waterproof cable and ordinary cable The cables that can be used normally in water are referred to as water-resistant (waterproof) power cables.  When the cable is laid under water, often in water or wet places, it is required that the cable has the function of water prevention (resistance), that is, it is required to have the function of full water resistance, so as to prevent water from immersing in the cable, causing damage to the cable, and ensure the long-term stable operation of the cable under water.  The difference between waterproof cable and ordinary cable is that ordinary cable can not be used in water.  


What are the types of waterproof cables  


One, oil paper insulated cable is the most typical water resistant cable.  Its insulation and conductor are filled with cable oil, insulation outside the metal sheath (lead sleeve or aluminum sleeve), is the best water resistance cable.  In the past, most of the submarine (or underwater) cables used oil paper insulated cables, but oil paper insulated cables are limited by the drop, have trouble of oil leakage, inconvenient maintenance, and are now used less and less.  


Two, widely used in low and medium voltage underwater transmission lines of ETHYLENE propylene rubber insulated cable, because of its superior insulation performance without "water tree" worries.  Waterproof rubber covered cable (JHS type) can operate safely in shallow water for a long time.  Three crosslinking polyethylene of power cable insulation because of its excellent electrical, mechanical and physical properties, and the production technology is simple and light structure, large transmission capacity, installation of installation and maintenance convenient, without being limited by the fall, to become the most widely used insulation materials, but it is particularly sensitive to moisture, if the insulation is in the process of manufacture and running water,  Easy to occur "water tree" breakdown, greatly shorten the service life of the cable.  Therefore, the xLPE insulated cable, especially the ac voltage under the action of medium and high voltage cable, in the water environment or humid environment use must have "water resistance structure".  The so-called "water blocking structure" includes radial water blocking structure and longitudinal water blocking structure.