Electric cable market can be a manufacturing company of simple gear and fundamental item. Which can be described because the "blood vessels" and "nerve" on the national economy, it's utilized for transmitting info and electricity and is indispensable to the electrification of the future, cable business is really a massive and supporting market, products must meet the needs from the major sector, the improvement of main market will promoted the improvement of cable market.
1、What is Electric Cable?
Cable is a kind
of wire products what is composed of numerous or numerous groups of conductors
twisted into a rope, every group of wires is insulated, and typically revolve
about a center rope, all of these are covered having a hugely insulating layer.
Wire and cable is utilized in electric energy, communication and media related
transmission purposes.
The basic
structure of cable consists of 4 components: core, insulation, shielding layer
and protective layer
(1) wire core
wire core is conductive a part of cable, which
is utilized for conveying energy, will be the main a part of the energy cable.
(2) the
insulation
Insulation
insulates the core、the earth and
also the various phase of wire core from one another, assure the electric
energy transmission, it is an integral part of cable structure.
(3) shielding
layer
the 15 kv and
above have conductor shielding layer along with the insulating shield commonly
.
(4) the role of
the protective cover
protective cover is used to defend the energy
cable from the the invasion on the impurities and moisture, and prevent the
external force damage the energy cable straight.
3、Different Classification In line with Diverse Types
1) in line with
the current type: communication cable, direct current cable; 2) in line with
the installation place: Overhead Power Cable, underground cable(Might be laid
at indoor, tunnel and tube .Cable can not below take mechanism outdoors force),
submarine cable (across the river,submarine cable). 3) in line with the
conductivity of wire core: ordinary cable, cryogenic and superconducting cable;
4) according to the amount of conductive wire: single core wire(several sorts
such as Single core rigid conductor nonsheathed cable、Copper core PVC insulated wire））and multicore cable including 2 core
wire, 3 core wire, 4 core wire, 5, six core wire and above,what are suitable
for the wiring of electrical controlling equipments and instrument,monitoring
and controlling return circuit. 5) Based on the insulation components, can be
divided into the oil impregnated paper insulating power cable, plastic
insulated energy cables, rubber insulated energy cable, for the plastic
insulated power cables,, the generally used plastic cable is polyethylene,
crosslinked polyethylene and Pvc
Insulation Wire. Plastic cable structure is simple and
simple to manufacture, simultaneously, with the characteristic of light weight,
effortless installation. As a result it really is broadly applied in medium and
low voltage cable, although its greatest drawback will be the phenomenon of
dendronized breakdown , which limits the use for higher voltage.
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