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What are the advantages of single-core cables and multi-core cables?
Release time:
2020-01-04
The advantages of single-core cables are small cross-sectional area ratio, not easy to air oxidation, short-circuit capacity impact resistance, and long service life. Defects of single-core wires The wires are relatively hard, and it is not convenient to pull the wires in some areas, so it is difficult to straighten the wires after bending, and it is very easy to destroy the wires after bending. Advantages of multi-core cables Multi-core cables are cables with a copper core cable with an upper insulation layer.
The advantages of single-core cables are small cross-sectional area ratio, not easy to air oxidation, short-circuit capacity impact resistance, and long service life. Defects of single-core wires The wires are relatively hard, and it is not convenient to pull the wires in some areas, so it is difficult to straighten the wires after bending, and it is very easy to destroy the wires after bending. Advantages of multi-core cables Multi-core cables are cables with a copper core cable with an upper insulation layer, which can reduce the skin effect of cables and thus reduce route loss.
The defects of multi-core cables are poor compressive strength, very easy to break, poor surge current resistance, and inconvenient forming. Single-core cable or multi-core cable is the best transmission line with the same cross-sectional area. The cost of a single copper core cable is more cost-effective than a multi-copper core cable, while the cost of a multi-copper core cable is slightly higher.
When installing and wire tube, the single copper core cable looks a little hard, and the multi copper core cable should be softer and stronger. After installation, the single core and the multi-core are similar in specific applications.
The difference between multi-core cable and single-core cable in the circuit capacity, the rated current capacity of single-core cable is greater than the rated current capacity of the same cross-section three-core cable; in terms of insulation performance, single-core and three-core cables need to meet national standards. On the premise of meeting national standards, a certain safety margin needs to be left, which can be understood as qualified insulation performance without difference;
From the perspective of cable use, the heat dissipation performance of single-core cable is greater than that of three-core cable (the same type of cable), plus the rated current carrying capacity of single-core cable with the same cross-section. Under the same load or short circuit, the heat generation of single-core cable is less than that of three-core cable, which is safer to use;
In terms of cable laying, single-core cable laying is more convenient and easier to bend, but the long-distance laying difficulty of single-core cable is greater than that of three-core cable;
From the installation of the cable head, the single-core cable head is easier to install and convenient to branch;
multi-core cable
Multi-core cable refers to a cable with more than one insulated core. Cables play an important role in electronic products and electronic systems. They are the key link to connect the various functions of electronic products and are widely used in aerospace and naval warships.
single core cable
Single core means that there is only one conductor in one insulation layer. When the voltage exceeds 35kV, most single-core cables are used. The relationship between the core and the metal shielding layer can be regarded as the relationship between the coil and the core in the primary winding of a transformer. When the single-core cable core through the current, there will be a magnetic line cross chain aluminum or metal shielding layer, so that it appears at both ends of the induced voltage.
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