What is the high temperature control cable? The timing […]
What is the high temperature control cable? The timing of the real high temperature resistant cable is the long-term continuous working temperature of 125 degrees, 135 degrees, 150 degrees, 180 degrees, 200 degrees, 250 degrees and more than 250 degrees. It is called high temperature resistant wire and cable. Currently, there are radiation crosslinking. Wire and cable such as polyolefin, silicone rubber, fluororesin, polyimide, mica, and magnesium oxide. Heat resistant wire and cable and high temperature wire and cable need to meet two needs. The first is that the wire and cable have a high ambient temperature, and the cable can normally transmit signals or electric energy under long-term high temperature; the other is the power transmission cable, which mainly aims to increase the intercepting capability.
Ordinary cables are prone to insulation aging and scorching at high temperatures, and the use of cables loses performance and is damaged and cannot be used. The high-temperature cable can work normally and stably at rated high temperature, and the signal or power transmission performance is not affected, and the cable has a long service life. This type of functional cable is the most common type of high temperature cable, and the use characteristics are also the easiest to understand.
The load-increasing high-temperature cable is mainly developed to reduce the outer diameter and weight of the cable under the premise of current-carrying. In general, the higher the operating temperature of the cable, the greater the current carrying capacity of the cable of the same cross section. In the case of airplanes and automobiles, the weight reduction is quite significant, and the use of high-temperature cables greatly reduces the cross-section. When the operating temperature is raised from 90 ° C to 155 ° C, the current carrying capacity is increased by 50%. Under the same current carrying capacity, the cable weight is reduced by half and the cost is also reduced. Of course, the high power cut-off, the power loss of most insulating materials will also increase. Therefore, it can be quite certain that the cost of high temperature wire and cable is much higher than the cost of general wire and cable.
Because the high temperature wire and cable is used as an emergency power line in the event of a problem in the power grid or line, it is also used as a power line in the event of a fire or other disaster. Therefore, high temperature wire and cable must be able to guarantee normal power transmission at high temperatures. When the ambient temperature reaches 700 °C or above, the power supply can be operated for more than 1.5 hours without causing a short circuit between the wires due to an increase in internal insulation due to an increase in ambient temperature.