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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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2020
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What are the characteristics of mineral-insulated cables? (Part 1)
Hongsheng: Because mineral-insulated cables are entirely composed of inorganic materials (metallic copper and magnesium oxide powder), they themselves cannot cause fires, cannot burn, or support combustion. Copper has a melting point of 1083℃, and the mineral insulation layer also has a melting point above 1000℃.
Mineral Cable Product Characteristics
I. Fire Prevention
Hongsheng: Because mineral cables are entirely composed of inorganic materials (metallic copper and magnesium oxide powder), they themselves cannot cause fires, cannot burn or support combustion. Copper's melting point is 1083℃, and the mineral insulation layer also has a melting point above 1000℃. Therefore, this type of cable can continue to supply power in fire situations approaching the melting point of copper, making it a fire-resistant cable in a meaningful sense. It can also pass the BS6387 C, W, and Z tests.
II. Hongsheng: Explosion-proof, Corrosion-resistant
Explosion-proof characteristics: Because mineral cables use a metal sheath as a protective layer, combustible gases, oil vapors, and flames cannot reach the electrical equipment connected to the cable, therefore the cable has explosion-proof characteristics.
Corrosion resistance: Because copper has good corrosion resistance, it does not require any additional protection under normal use. In special environments, such as those with strong corrosive effects on copper, an additional PVC outer sheath is added to the cable, so the cable has excellent corrosion resistance.
III. Hongsheng: Mineral cables are resistant to mechanical damage, have a long lifespan, and are halogen-free and non-toxic
Resistance to mechanical damage: Due to the cable's metal sheath having a certain strength and toughness, when the cable is subjected to bending, flattening, twisting, and other deformations, the relative positions between the cores and between the cores and the sheath remain unchanged, preventing short circuits and not affecting electrical performance.
Long lifespan: Because the materials used in the cable are all inorganic materials, they do not age. Their service life can be calculated according to the oxidation corrosion rate of the copper sheath. Data shows that for the sheath to oxidize 0.25mm, it takes 257 years at an ambient temperature of 250℃. The sheath thickness of mineral-insulated cables is generally between 0.34-1.05mm, and the operating temperature is below 250℃, so this cable has a long lifespan.
Halogen-free and non-toxic: Because the cable is entirely composed of inorganic materials (metallic copper and mineral insulation layer), even when burning at a high temperature of 1000℃, it will not produce smoke, halogens, or toxic gases, making it a halogen-free and non-toxic cable in a meaningful sense.
Mineral cable, Hongsheng
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