Discussion: how to choose heat-resistant high-temperature wire cable

　　The heat-resistant high-temperature wire cable refers to the cable with long continuous working temperature of 125 degrees, 135 degrees, 150 degrees, 180 degrees, 200 degrees, 250 degrees and 250 degrees. Currently, it is used to have irradiated crosslinked polyolefin, silicone rubber, fluorinated resin, polyimide, mica and magnesia cable. Ordinary cables are prone to insulation aging and coke burning during high temperature. Use of cables to lose performance and damage can not be used. High temperature cable can work normally in high temperature, signal or power transmission performance is not affected, and it can guarantee the long service life of the cable. This kind of functional cable is the most common type of high temperature cable, and the characteristics are also easiest to understand.
　　Heat resistant high temperature wire and cable with oil resistant, waterproof, wear-resistant, resistant to acid and alkali, and all kinds of corrosive gas, ageing resistance, not burning, such as excellent performance, which is widely used in metallurgy, electric power, petrochemical and other industries. Below, a look at how to choose heat resistant high-temperature wire cable.
　　General electric wire electric cable is plastic and rubber as an insulating sheath, these materials are conventional engineering materials, have abundant sources, can satisfy the mass production, and the cost is relatively low. But for some special industries such as petrochemical, steel, aerospace, shipbuilding, war industry, pharmaceutical, food, plastics machinery, boilers and other industries related to the heat and high temperature, all need to be able to bear certain high temperature wire and cable, ordinary wire and cable obviously cannot use, need to be capable of high temperature wire and cable to ensure the safe operation of the power and signal.
　　Along with our country economy fast development, the special industry demand for high temperature cable has been rapid growth phase, heat resistant and high temperature cable is growing at 20% a year, high temperature cable as an important part of special cable, have extremely strong vitality, in short supply, China imported about two billion yuan a year for domestic construction. The international electrotechnical commission (IEC) is divided into:
　　Heat resistance grade YAEBFHC
　　Maximum allowable working temperature / ℃ 90105120130155180 180 or higher
　　Our ordinary electrical cable insulation and sheath are ordinary engineering rubber and plastic as the basic resin, but the requirements are insulation level. Common cable with a rubber materials are: butyl rubber, ethylene propylene rubber, natural rubber and chlorosulfonated polyethylene, such as working temperature (60 ~ 75 ℃); Common cable with plastic material with polyvinyl chloride (PVC), polyethylene (including crosslinking polyethylene) and polypropylene, such as working temperature (70 ~ 90 ℃). Thus, these cables are not strictly heat-resistant or high-temperature cables.
　　Heating cable usually under (90 ~ 155 ℃) and cable, and cable of high temperature is above 180 ℃ and cable. In order to solve the high temperature condition of ordinary cable, it is to improve the material, or use the insulation class material that can withstand high temperature.