Electric cable
business is really a manufacturing company of standard equipment and basic
solution. Which can be described because the "blood vessels" and
"nerve" in the national economy, it's used for transmitting data and
electrical energy and is indispensable to the electrification of the future,
cable sector is a large and supporting business, products need to meet the
specifications of the main market, the development of main business will
promoted the improvement of cable market.
1、What is Electric Cable?
Cable can be a
sort of wire merchandise what is composed of many or numerous groups of
conductors twisted into a rope, each and every group of wires is insulated, and
usually revolve about a center rope, all of these are covered using a extremely
insulating layer. Wire and cable is utilised in electric energy, communication
and media associated 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, that
is employed for conveying power, will be the primary part of the power cable.
(two) the
insulation
Insulation
insulates the core、the earth and
the distinct phase of wire core from each other, guarantee the electric energy
transmission, it truly is an integral part of cable structure.
(three)
shielding layer
the 15 kv and
above have conductor shielding layer as well as the insulating shield
frequently .
(four) the role
on the protective cover
protective cover is utilised to protect the
power cable from the the invasion of the impurities and moisture, and avoid the
external force damage the energy cable straight.
3、Different Classification According to Diverse Forms
1) in accordance
with the present kind: communication cable, direct present cable; 2) based on
the installation location: Overhead Power Cable, underground cable(Can be laid
at indoor, tunnel and tube .Cable cannot beneath take mechanism outdoors
force), submarine cable (across the river,submarine cable). three) based on the
conductivity of wire core: ordinary cable, cryogenic and superconducting cable;
four) based on the amount of conductive wire: single core wire(numerous sorts
like Single core rigid conductor nonsheathed cable、Copper core PVC insulated wire））and multicore cable for example two core
wire, 3 core wire, 4 core wire, five, six core wire and above,what are
appropriate for the wiring of electrical controlling equipments and
instrument,monitoring and controlling return circuit. five) According to the
insulation components, may be divided in to the oil impregnated paper
insulating energy cable, plastic insulated power 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 easy
and easy to manufacture, simultaneously, with all the characteristic of light
weight, easy installation. Therefore it's broadly applied in medium and low
voltage cable, whilst its greatest drawback is the phenomenon of dendronized
breakdown , which limits the use for higher voltage.
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