What is high temperature resistant cable? and how to classify it?

2022-01-10
What is the high-temperature cable?
There are many types of cables, such as: high temperature cable, fire-resistant cable, low-temperature cable and so on, because of different functions, it has been applied to different industries.  Each construction unit will be more or less involved in the use of high temperature cable.  We literally know that high temperature tolerance means operating at high temperatures, but do you know how high temperatures are in general?  Below, xiaobian take you to understand what is high temperature resistant cable.  
 
Long-term continuous operating temperature 125 degrees, 135 degrees, 150 degrees, 180 degrees, 200 degrees, 250 degrees and more than 250 degrees is high temperature resistance wire and cable, currently commonly used irradiation crosslinked polyolefin, silicone rubber, fluorine resin, polyimide, mica, magnesium oxide and other wires and cables.  Heat resistant wire and cable and high temperature wire and cable need to meet two needs.  One is that the ambient temperature of wire and cable is high, and the cable can normally transmit signals or electric energy under high temperature for a long time.  The other is the power transmission cable, mainly to increase the interception capacity for the main purpose.  

Ordinary cables are easy to produce insulation aging and coke phenomenon at high temperature, the use of cables lose performance, damage and can not be used.  The high temperature cable can work normally and stably at rated high temperature, without affecting the signal or power transmission performance, and ensure that the cable has a long service life.  This kind of functional cable is the most common high temperature cable, the use of the characteristics of the most easy to understand.  
 
Loading type high temperature cable, mainly in order to ensure the current load under the premise of reducing the cable diameter and weight, to lightweight development.  Generally speaking, the higher the operating temperature of the cable, the greater the current-carrying capacity of the same cable.  In situations like airplanes and automobiles, weight reduction is of great significance, and the use of high-temperature cables greatly reduces the cross section.  When the working temperature rises from 90℃ to 155℃, the current-carrying capacity rises by 50%. Under the same current-carrying capacity, the weight of the cable will be reduced by half and the cost will also be reduced.  Of course, at the same time of high closure, the power loss of most insulating materials will also increase.  Therefore, it is certain that the cost of high temperature resistance wire and cable is much higher than the cost of general wire and cable.  
 
High temperature resistant cables are mainly divided into two categories.  Namely fluorine plastic material and silicone rubber material.  Of course, there are other heat insulation materials, but at present the market is common with these two main.  
 
There are two main categories of high temperature resistant cables  
 
A, fluorine plastic wire and cable is: poly perfluorinated ethylene propylene (FEP, commonly known as F46), polytetrafluoroethylene (PTFE), ethylene-tetrafluoroethylene copolymer (ETFE, commonly known as F40), poly vinylidene fluoride (PVDF).  Fluorine plastic cables mainly include: high temperature communication cable, high temperature resistance wire and installation line, high temperature compensation wire and industrial high temperature resistance power and control signal cable, atomic reactor with radiation resistance cable and locomotive and rolling stock wire, etc.  
 
Two, silicone rubber insulated wire and cable: silicone rubber has a better heat resistance function.  The commonly used silicone rubber for wires and cables is methyl ethylene silicone rubber, and the working temperature scale is -60℃ ~ 180℃.  Silicon rubber has good tortuous function and low temperature function, which is not easy to damage and crack. These functions are not available to general high temperature cables. Therefore, silicon rubber cables have a wide application scale, which has been a bright spot of high temperature cables.  Silicone rubber cable in high temperature mobile cable, soft power cable, motor wiring, low temperature environment and high temperature operation place.  
 
The above content is introduced to distinguish the type of high temperature resistant cable, according to the heat insulation material to distinguish, of course, there are some ultra high temperature cable material is special.