Difference Between HV and LV Cables

Sep. 07, 2022

For materials, the low voltage cable can use copper or aluminum for the conductor, high voltage cable copper conductor is more, in addition to the overhead lines (steel core aluminum stranded wire, etc.);


From the conductor cross-sectional area, because the high voltage cable on the carrying capacity is larger, so the nominal cross section conductor is often compared to big (but not necessarily, conductor cross-section of low pressure is very big also, mainly the use of occasions to decide).


On the shape of it, in addition to the reasons of low voltage cable, sometimes to save costs, can be made abnormity of conductor, such as tile shape, fan, semicircle, but the high voltage cable often make it round conductor, to facilitate heat dissipation (or split conductors circular, reduce skin effect).


Electrical cables come in seven different categories of voltages. They are - rated, nominal, extra-low, low, medium, high and extra-high.


Cables work on voltage levels. They are selected depending upon the voltage that will be passed through wires. In this post, we will see some basic differences between two widely used cables - HV (High Voltage) and LV (Low Voltage).


Both these cables use copper and aluminium as conductor alloys.


HV Cables


High Voltage Cable


HV cables are used for a very high voltage transmission; typically used in power plants and transformers. It will vary between 33kV to 220kV. They mostly work on power grids.


The reason for using such types of cables is that they increase efficiency in a very good way. As they are very high voltages, the insulation too must be very strong in such high tension wires.


They have a very high layer of insulation protection for a reliable transmission mode. Due to a high level of electrical engineering used in the transmission of the voltage of such large levels, a very big scale of industrial automation technologies like DCS, SCADA, and other centralized modes of control are used so that the transmission happens properly through these cables and there is no risk to human life or nearby surrounding.


LV Cables


Low Voltage Cables


LV cables are used for domestic and small-scale industrial purposes. It will vary between 70V to 600V. A large scale of automation technologies and factories employing it use these cables as they are enough to satisfy the working of machines.


It can be said that if high voltage cables are used for power purposes, then low voltage cables are used for control purposes. In any case, no human can touch these live wires, or else it may cause death.


Voltage from power plants is stepped down through transformers and substations; which then give us a normal reliable voltage for our domestic and industrial purposes.


To pass all these voltage levels efficiently, cables play a very important role and each cable has its own electrical properties which must be understood properly before selecting it.


Ruitian Cable Mainly produces Power Cable, Electric Cable, Solar Cable, Rubber Cable, Control Cable, Automotive Cable, High Temperature Cable. Ruitian Cable welcome OEM and ODM orders. Whether selecting a current product from our catalogue or seeking engineering assistance for your application, welcome to contact our customer service center to tell us your requirements. We will try our best to give you satisfied service.

Related Products

Request a Quote

  • wechat

    Janey: +86 138 3311 9023

  • wechat

    Ivy: +86 150 8117 8223

  • wechat

    Chloe: +86 181 3119 7232