Why single core AC cables cannot adopt steel tape armored?
Power Cable
Power cables are mainly used for power transmission and distribution purpose. It is an assembly of one or more individually insulated electrical conductors, usually held together with an overall sheath. The assembly is used for transmission and distribution of electrical power. Electrical power cables may be installed as permanent wiring within buildings, buried in the ground and run overhead or exposed.……Including: rubber cable, welding cable, URD cable, XLPE insulated power calbe etc.
Bare Overhead Conductor
Bare Overhead Conductors are used in overhead transmission and distribution network applications.They are also used for un-insulated hook ups, jumpers, grounding conductors and other applications. Our Conductors conform to ASTM, IEC, BS, BS EN and DIN standards.…… Including: AAC conductor, AAAC conductor, ACSR conductor, ACAR conductor, AACSR conductor, etc.
Aerial Bundled Cable
Aerial bundled cables (also aerial bundled conductors or simply ABC) are overhead power lines using several insulated phase conductors bundled tightly together, usually with a bare neutral conductor. Our abc calbe conform to ASTM, IEC, SANS standards.……Including: abc cables, cvered line wire, service drop wire etc.
Due to the magnetic lines of force, and the number of turnkey generated a current through the cable core in the surrounding magnetic field lines, magnetic field and the line core current size is proportional to, the three core cable, when the three-phase current balance, the cable protecting layer of lead package, armored magnetic flux passing, but in the single core cable, even if the system of three-phase current balance, due to the three core sheath, so the protection layer has magnetic field lines by protecting layer by magnetic lines of force and permeability is proportional to the steel strip for ferromagnetic materials, the permeability is high, therefore, the strip by means of a lot of alternating current is alternating, so in the strip is generated by the alternating magnetic field lines, according to electromagnetic Induction law shows that in the strip will produce eddy current heating cable, when the strip at the two ends of the line grounding and the formation of a closed loop, in strip produced an induced current and its size increases with the increase of current, will produce great loss and effect of heating cable transfer capacity. Therefore, in the communication system, single core cable cannot adopt steel tape armored.
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