Electric cable
industry is actually a manufacturing enterprise of simple equipment and
fundamental item. Which is described because the "blood vessels" and
"nerve" on the national economy, it truly is utilized for
transmitting information and electrical energy and is indispensable towards the
electrification from the future, cable industry is really a massive and
supporting sector, products need to meet the needs of the major sector, the
improvement of principal market will promoted the improvement of cable
business.
1、What is Electric Cable?
Cable is really
a type of wire merchandise what's composed of many or numerous groups of
conductors twisted into a rope, each group of wires is insulated, and typically
revolve about a center rope, all of these are covered using a extremely
insulating layer. Wire and cable is utilized in electric power, communication
and media related transmission purposes.
The basic
structure of cable consists of 4 parts: core, insulation, shielding layer and
protective layer
(1) wire core
wire core is conductive part of cable, which
is employed for conveying power, will be the major part of the energy cable.
(2) the
insulation
Insulation
insulates the core、the earth and
the distinct phase of wire core from each other, assure the electric power
transmission, it really is an integral a part of cable structure.
(3) shielding
layer
the 15 kv and
above have conductor shielding layer and also the insulating shield frequently
.
(4) the part in
the protective cover
protective cover is employed to defend the
power cable in the the invasion of the impurities and moisture, and avert the
external force harm the energy cable directly.
3、Different Classification In line with Distinct Forms
1) according to
the present kind: communication cable, direct current cable; 2) according to
the installation location: Overhead Power Cable, underground cable(Might be laid
at indoor, tunnel and tube .Cable can not beneath take mechanism outdoors
force), submarine cable (across the river,submarine cable). 3) in accordance
with the conductivity of wire core: ordinary cable, cryogenic and
superconducting cable; 4) according to the amount of conductive wire: single
core wire(a lot of varieties for example Single core rigid conductor nonsheathed
cable、Copper core PVC
insulated wire））and multicore
cable like 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) In line with the
insulation materials, may be divided in to the oil impregnated paper insulating
energy cable, plastic insulated power cables, rubber insulated power cable, for
the plastic insulated power cables,, the typically utilized plastic cable is
polyethylene, crosslinked polyethylene and Pvc
Insulation Wire. Plastic cable structure is easy and
easy to manufacture, simultaneously, together with the characteristic of light
weight, effortless installation. As a result it's widely applied in medium and
low voltage cable, although its biggest drawback would be the phenomenon of
dendronized breakdown , which limits the use for higher voltage.
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