1. Cable armoring function
Enhance the mechanical strength of the cable
Armored protective layer can be added to any structure of the cable to increase the mechanical strength of the cable, improve the anti-erosion ability, is a cable designed for areas vulnerable to mechanical damage and extremely vulnerable to erosion. It can be laid in any way, and is more suitable for direct buried laying in rocky areas.
Prevent bites from snakes, insects, and rats
The purpose of adding armor layer to the cable is to increase the tensile strength, compressive strength and other mechanical protection to extend the service life; It has certain external force resistance, and can also guard against snakes, insects and mice biting, so as not to cause power transmission problems through armor, the bending radius of armor should be large, and the armor layer can be grounded to protect the cable.
Resist low frequency interference
Commonly used armored materials are steel tape, steel wire, aluminum tape, aluminum tube, etc., among which steel tape, steel wire armor layer has high magnetic permeability, has a good magnetic shielding effect, can be used to resist low-frequency interference, and can make armored cable directly buried and free from pipe and inexpensive in practical application. The stainless steel wire armored cable is used for shaft chamber or steeply tilted roadway. Steel tape armoured cables are used in horizontal or gently inclined workings.
2. Cable twisted function
Enhance flexure
Copper wires of different specifications and different numbers are twisted together according to a certain arrangement order and lay length to become a conductor with a larger diameter. The twisted conductor with a large diameter is softer than a single copper wire of the same diameter. The wire bending performance is good and it is not easy to break during the swing test. For some wire requirements for softness (such as medical grade wire) it is easier to meet the requirements.
Extend service life
From the electrical performance: After the conductor is energized, due to the resistance consumption of electrical energy and heat. With the increase of temperature, the material performance life of insulation layer and protective layer will be affected. In order to make the cable operate efficiently, the conductor section should be increased, but the large section of a single wire is not easy to bend, the softness is poor, and it is not conducive to production, transportation and installation. In terms of mechanical properties, it also requires softness and reliability, and multiple single wires are twisted together to solve the contradiction.
Post time: Oct-18-2024