Low-voltage, High-voltage Power Cable Knowledge Brief

According to my recent understanding, a part of the residents as well as construction engineering personnel are not very well understood the difference between low-voltage and high-voltage cables of photovoltaic cables, then today I will solve this confusion for you, and before distinguishing between high-voltage cables and low-voltage cables, we will introduce to you from the concept, structure, use of these aspects.

1、Concept

High-voltage cable: high-voltage cable is one of the power cable, it is used to transmit 1kv-1000kv high-voltage power cable

Low-voltage cable: low-voltage cable is used to transmit power cables below 1kv.

2、Structure

High voltage cable:Its structure from inside to outside can be distinguished as conductor,internal semiconductor layer,insulation layer,external semiconductor layer,shielding layer and external sheath,high voltage can resist external damage while it is mainly used for underground burial to prevent high strength compression on the ground.

Low-voltage cable: Its structure can be divided into conductor, filler, insulation layer and protective sheath. The role of the conductor is used to transmit current, and it is made of multi-strand copper or aluminum wire, while having a single-core, dual-core, three-core and four-core and other types.

3、Use

High-voltage cable: its use is to increase the transmission capacity, increase the stability limit, reduce line consumption, reduce project investment, save corridor laying area and improve the structure of the power grid.

Low-voltage cable: its use is to connect low-voltage power and equipment, control cables, communication cables and signal cables are in this category.

So how to distinguish between the two? Mainly depends on the following points:

1. Assumptions: When high and low voltage lines are erected separately, the erection distance between the two poles of the high voltage line becomes larger, and the two poles also become larger, when both are erected on the same pole, the low voltage line is located at the bottom and the high voltage line is located at the top, while the distance between the high voltage lines is smaller. The pressure is great.

2. Check the structure: The biggest difference between the structure of low-voltage cable and high-voltage cable is in the simple, only a layer of insulation and protective jacket, after removing the jacket, the high-voltage cable has a main insulation layer, the main insulation layer wrapped around the outside of the cable core.

3. Check the brand name: the outermost layer of the cable will be printed with the relevant parameters of the cable, including length, rated voltage, cable type, cross-sectional area, etc.. This is the most intuitive, the most accurate identification method.

Today for you to popularize the difference between the cable low-voltage, high-voltage you Get it, a friendly reminder Oh, whether in daily life or in the site operations you must pay attention to the safety of electricity to prevent unnecessary accidents, but also want to know more about cable information, please continue to pay attention to our XSD cable, the follow-up will continue to push the different news hot, please pay attention to ~