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A few days ago, a domestic cable enterprise 220kV high-voltage cable ultra-large section 2500mm2 halogen-free low-smoke flame retardant cable successfully trial-produced, and sent to the National Fireproof Building Materials Quality Supervision and Inspection Center for halogen-free, low-smoke and Class A flame retardant and other performance testing
.
Halogen-free LSV cables are the most typical representative of
"clean cables".
Halogen-free low-smoke materials generally use more than two halogen-free flame retardants to achieve better results, but because most of the flame retardants are inorganic, and the amount of addition is large, which seriously affects the plasticity and extrusion properties of the material, resulting in small glue output, poor surface quality, uneven thickness, easy to crack and other shortcomings, so it is mainly used for the production of
low-voltage, small-section and small-diameter cables 。 For high-voltage cables, due to the thick thickness of the sheath, large cross-section, large outer diameter, the use of large diameter extruder, the extrusion pressure in the production process is very large, extrusion is difficult, and it is easy to cause the early decomposition of flame retardants due to the high temperature generated by the friction and shear of extrusion, resulting in the failure
of the material.
Therefore, the application of halogen-free low smoke in high-voltage cables is difficult to achieve
.
After long-term research and testing, the cable enterprise has made targeted improvements to the production technology of halogen-free and low-smoke high-voltage cables, and has solved the defects of the cable such as difficult extrusion, poor surface quality, uneven thickness and easy cracking, so as to successfully develop a 220kV high-voltage cable with a large cross-section of 2500mm2 environmentally friendly halogen-free low-smoke flame retardant cable
.
A few days ago, a domestic cable enterprise 220kV high-voltage cable ultra-large section 2500mm2 halogen-free low-smoke flame retardant cable successfully trial-produced, and sent to the National Fireproof Building Materials Quality Supervision and Inspection Center for halogen-free, low-smoke and Class A flame retardant and other performance testing
.
Halogen-free LSV cables are the most typical representative of
"clean cables".
Halogen-free low-smoke materials generally use more than two halogen-free flame retardants to achieve better results, but because most of the flame retardants are inorganic, and the amount of addition is large, which seriously affects the plasticity and extrusion properties of the material, resulting in small glue output, poor surface quality, uneven thickness, easy to crack and other shortcomings, so it is mainly used for the production of
low-voltage, small-section and small-diameter cables 。 For high-voltage cables, due to the thick thickness of the sheath, large cross-section, large outer diameter, the use of large diameter extruder, the extrusion pressure in the production process is very large, extrusion is difficult, and it is easy to cause the early decomposition of flame retardants due to the high temperature generated by the friction and shear of extrusion, resulting in the failure
of the material.
Therefore, the application of halogen-free low smoke in high-voltage cables is difficult to achieve
.
After long-term research and testing, the cable enterprise has made targeted improvements to the production technology of halogen-free and low-smoke high-voltage cables, and has solved the defects of the cable such as difficult extrusion, poor surface quality, uneven thickness and easy cracking, so as to successfully develop a 220kV high-voltage cable with a large cross-section of 2500mm2 environmentally friendly halogen-free low-smoke flame retardant cable
.
