F & Q
1. What kind of wire is called high temperature wire?
As the name implies, the high temperature wire is the wire that is resistant to high temperature. Of course, in addition to high temperature resistance, a large part of high temperature lines are also resistant to low temperature, and also have: excellent corrosion resistance, oil resistance, strong acid resistance, strong alkali resistance, etc.; excellent electrical insulation properties, low frequency loss, no absorption Moisture, high insulation resistance; excellent flame retardant, aging resistance, long service life.
2. Under what circumstances should high temperature wires and cables be used?
High-temperature wires and cables are generally determined by two requirements: the first is that the ambient temperature of the wire and cable is relatively high, and the cable can transmit signals or electric energy normally under high temperature for a long time; the other is the power transmission cable, which mainly increases the current interception capacity. main purpose.
3. What is the difference between ordinary cables and high-temperature cables in high temperature environments?
Ordinary cables are prone to insulation aging and scorch at high temperatures, and the used cables lose their performance and cannot be used due to damage. High-temperature cables can work normally and stably at rated high temperatures without affecting signal or power transmission performance, and can also ensure a long service life of the cable. This type of functional cable is the most common type of high-temperature cable, and its use characteristics are also the easiest to understand.
4. How to choose tinned copper wire and silver-plated copper wire for conductors of high temperature wires?
In terms of performance, of course, silver plating is the best. There are three reasons, one is that the conductivity of silver is much better than that of tin; the other is that the conductor has a surface effect of conducting electricity, that is, the current distribution of the conductor is not uniform during conduction, and the closer to the conductor surface, the greater the current, so choose the conductivity. The strongest silver is the best as the coating; the third is that silver-plating has higher temperature resistance than tin-plating. In terms of cost, tinned copper wire is a more cost-effective choice.
5. What is the function of the shielding layer of the high temperature cable?
On the one hand, in the cable, the current passing through is relatively large, and a large magnetic field will be generated around the current, which is likely to have a large impact on the surrounding components. With cable shielding, the generated electromagnetic field can be shielded in the cable, protecting surrounding components. On the other hand, if there is damage in the cable, the leaked current will flow to the grounding network along the shielding layer, which can play a protective function and avoid safety problems. In addition, the shielding layer can effectively prevent the interference caused by external electromagnetic waves and ensure the normal operation of the circuit.
6. What is the difference between Teflon wire and silicone rubber wire and cable in use?
Teflon is a relatively hard thermoplastic and will re-melt when exposed to high enough temperatures. While silicone rubber is a soft thermoset material, when exposed to excessively high temperatures, silicone rubber will carbonize or degrade into a very fine powder that does not require cleaning. Since Teflon is a material harder than silicone rubber, its ultimate tensile strength is twice that of silicone rubber, and the insulating layer has a certain memory. Ring shape when packaged in rolls. Silicone rubber insulated wire and cable, on the other hand, are very soft and have no shape memory, making them ideal for repeated bending. Both high temperature wires have good electrical insulation. Teflon is more suitable for transmitting high-frequency AC signals, because Teflon can be extruded into a thinner insulation thickness, which can reduce signal path loss, increase transmission rate and extend transmission distance. In contrast, silicone rubber insulated wire and cable retains a capacitive charge for a long time. In addition, in terms of moisture resistance, Teflon is moisture-proof. It doesn't absorb moisture, even with thin insulation, moisture won't seep inside. Silicone rubber, like many electrical insulating materials, absorbs a small amount of moisture and penetrates the insulating layer into the interior of the structure.
7. What are the functions of the high-voltage line?
The main function of the high-voltage line is to transmit electric energy, and the use of high-voltage transmission is to reduce the loss generated on the line; effectively improve the ignition voltage, which can protect the normal operation of the ignition system and electrical system; play a current equalizing role in high-voltage distribution; and prolong the discharge of the spark plug. time to increase the firing rate. Due to the high reliability requirements for the safe operation of high-voltage wires and the large transmission capacity, the selection and installation of high-voltage cables should be cautious.
8. What are the mica high temperature wires on the market?
Mica high temperature wire is also called mica wrapped wire, refractory wire. Generally, there are three or four layers of structure, followed by conductor, glass fiber, mica, glass fiber. The third layer is to remove the middle layer of glass fiber, mainly considering that customers are not easy to cut during installation. Then from the selection of conductors, mica and glass fiber, 350 degrees, 500 degrees, 800 degrees, 1000 degrees (limit 1200 degrees) can be produced. Of course, the production process is also very elegant.
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