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About UsHongsheng Wire and Cable Co., Ltd. is a key enterprise in Zhejiang Province specializing in the production of wires and cables, integrating industry, commerce, trade, production, education, and research. Its main production, processes, and testing equipment are all designed and configured according to international standards.
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ProductsEmploy scientific management and quality assurance systems based on GB/T19001—IS09001 and GB/T24001—ISO14001 environmental management systems to organize production management.
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Contact UsWe believe: Great achievements depend on quality. Your satisfaction is our eternal pursuit!
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2021
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YJV cable suppliers introduce precautions for the construction of fire-resistant special cables
YJV cable suppliers introduce the precautions for the construction of fire-resistant special cables. Fire-resistant special cables can maintain normal operation of the circuit for a period of time even under combustion conditions. In other words, once a fire occurs, the fire-resistant special cable will not burn immediately, and can still maintain normal power supply for a period of time.
YJV cable supplier introduces precautions for the construction of fire-resistant special cables
Fire-resistant special cables can maintain normal operation of the circuit for a period of time under burning conditions, which means that in the event of a fire, fire-resistant special cables will not burn immediately and can still maintain normal power supply for a period of time.
YJV cable supplier provides four precautions for the construction of fire-resistant special cables
1. When using fire-resistant special cables in special cable tunnels and special cable interlayers with dense special cables, or in flammable places such as oil pipelines and oil depots, fire-resistant special cables should be prioritized. Except for these situations, when the number of special cables is small, Class B fire-resistant special cables should be selected.
2. Fire-fighting cables are mostly used for the power supply circuit of emergency power supply, and need to work normally in case of fire.
Because the ambient temperature rises sharply during a fire, in order to ensure the transmission capacity of the line and reduce the voltage drop, for special cable lines with longer lengths and strictly limited allowable voltage drop, the cross-section of the fire-resistant special cable should be increased by at least one level.
3. Fire-resistant special cables cannot be used as high-temperature resistant special cables.
4. In order to reduce the failure probability of special cable joints in fire accidents, the number of joints should be minimized during installation to ensure that the lines can work normally during fire accidents. If branch wiring is required, the joints should be fireproofed.
YJV cable supplier introduces the performance characteristics of high-temperature control cables
Ordinary control cables are prone to insulation aging and charring at high temperatures, and used cables lose their performance due to damage and cannot be used. High-temperature cables can work normally and stably at rated high temperatures, and the signal or power transmission performance is not affected, and the cable can also have a longer service life. This functional cable is a common high-temperature cable, and its usage characteristics are easy to understand.
The purpose of increasing the load of high-temperature cables is to reduce the outer diameter and weight of the cable under the premise of carrying current, and to develop towards lightweight. Generally speaking, the higher the operating temperature of the cable, the greater the current carrying capacity of the cable with the same cross-section. For aircraft, automobiles and other occasions, weight reduction is of great significance, and the use of high-temperature cables greatly reduces the cross-section. When the operating temperature rises from 90 to 155, the current carrying capacity will increase by 50%. With the same current carrying capacity, the weight of the cable will be reduced by half, and the cost will also be reduced. Of course, while the cutoff is high, the power loss of most insulating materials will also increase. Therefore, it can be said that the cost of cables in high-temperature wires is far higher than that of ordinary wires and cables.
High-temperature wires and cables refer to cables with continuous operating temperatures of 125, 135, 150, 180, 200, 250 degrees Celsius and above. Commonly used ones include irradiated cross-linked polyolefin, silicone rubber, fluoroplastic, polyimide, mica, magnesium oxide, etc. Heat-resistant wires and cables and high-temperature wires and cables need to meet two requirements. One is that the ambient temperature of the wire and cable is relatively high, and the cable can transmit signals or electricity normally for a long time at high temperatures; the other is a power transmission cable, the main purpose is to increase the interception capacity.
That's all for today's introduction from YJV cable supplier. Thank you for watching.
YJV cable supplier
Guangzhou Baiyun International Airport
2017-09-13
2017-09-13
2017-09-13
2017-09-13
2017-09-13
2017-09-13
2017-09-13
2021-04-13
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Address: Central Industrial Park, Luqiao District, Taizhou City, Zhejiang Province
Fax: 86-576-82670077
