LV cable refers to low-voltage cable
MV cable refers to medium voltage cable
The differences mainly include the following:
1, Voltage level
LV cable : usually refers to cables with a rated voltage of 1 kV or below, and common rated voltages include 220V, 380V, etc. These cables are mainly used in low-voltage power distribution systems.
MV cable: a cable with a rated voltage between 1 kV and 35 kV. They are mainly used in places that require high voltage levels, such as urban power distribution, industrial and mining enterprises, and large buildings.
2, Application Fields
Low voltage cable: Due to their low voltage level, low-voltage cables are widely used in small electrical appliances and lighting devices such as homes, offices, commercial buildings, as well as low-voltage power distribution systems.
Medium voltage cable: Due to their high voltage level and transmission capacity, medium voltage cables are commonly used in places that require large amounts of power transmission and distribution, such as urban power grids, industrial areas, large buildings, and underground highways.
3, Structural materials
LV cable: The structure is relatively simple, usually composed of conductors, insulation layers, sheaths, and other parts. The conductor material is generally made of copper or aluminum, and the insulation layer is often made of materials such as polyethylene and cross-linked polyethylene. The insulation layer of low-voltage cables is relatively thin, resulting in lower manufacturing costs.
MV cable: The structure is relatively complex, and the conductor cross-section is generally above 10kV. It is usually composed of multiple stranded bare copper or bare aluminum conductors. In order to improve insulation performance, medium voltage cables usually adopt a two-layer or three-layer insulation structure, including a semiconductor layer, a high-voltage silicone rubber insulation layer, or a thermoplastic epoxy layer for optical cables. In addition, medium voltage cables will have a metal protective layer added to the outer sheath to protect the cable.
4, Performance characteristics
Low voltage cable: low voltage level, but good line stability, low transmission loss, and long service life. Due to its low manufacturing cost, low-voltage cables are widely used in various fields of life.
Medium voltage cable: It has the characteristics of long transmission distance, low transmission loss, and large load capacity. However, due to its complex structure and high material costs, the price of medium voltage cables is relatively high. But its stability and reliability in power transmission and distribution are also higher.
