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Flame retardant cable, is refers to under specified test conditions, specimen was burning, after removed test of ignition, flame spread only in a limited range, or the flames burning residue in the finite cable to self extinguishing in the course of time. Fundamental characteristic is: in the case of a fire could be burn out and can not run, but can stop the fire from spreading. Informally, wire one thousand fire, can limit the combustion in the local scope, does not produce spread, hold on to the other all sorts of equipment, avoid to cause a greater loss.
Fire-resistant wire and cable is to point to in wire and cable fire accident, the wire and cable products can in the case of the fire is still burning, can stick to a certain time of normal operation, keep the wire and cable line integrity and maintain the normal operation of line equipment of wire and cable manufacturers in shandong.
The basic structure of power cable line by core (conductor), insulation, shielding layer and protective layer of four parts.
Wire core is conductive part of power cable, which is used to transfer power, is the main part of the power cable.
Insulation is the line between the core and the earth and the different phase of wire core in the electrical insulated from each other, guarantee the electric power transmission, is an integral part of power cable structure.
More than 15 kv power cables are generally have a conductor shielding layer and the insulating shield.
The role of the protective layer is to protect the power cable from the outside world the invasion of the impurities and moisture, and prevent the external force directly damage the power cable.
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