What are the main properties of mineral cables?

  Mineral cables have large carrying capacity, water, explosion-proof, corrosion resistance, high operating temperature, corrosion resistance, and overload protection, so their life is longer than traditional cables.The durability and reliability of mineral cables are more advantageous than traditional cables. In addition, mineral cables are also fire-resistant. The continuous operating temperature of mineral cables is 250℃, and the power supply can last for 3 hours at 950℃-1000℃. It can work close to the melting point of copper at 1083℃ in a short period of time or in an extraordinary period.Due to the excellent performance of mineral insulated cables, it is suitable for lines with a rated voltage below 1000V.

  1. The main properties of mineral cables

  (1) Fire resistance

  Since mineral cables are all composed of inorganic substances, they will not cause fire by themselves, cannot burn or assist combustion, and will not produce toxic gases. Even if there is a flame burning outside, the cable can still work normally.After the fire is cleared, the cable does not need to be replaced. It is a kind of fireproof cable in the true sense, which provides a foolproof guarantee for fire-fighting lines and has passed the test of the International Electrotechnical Commission IEC331.

  (2) Large carrying capacity

  Due to the normal use temperature of mineral insulated cables, the temperature can reach 250℃.IEC60702 stipulates that the continuous operating temperature of mineral insulated cables is 105℃.This is taking into account the terminal sealing material and safety needs.Even so, its cut-off flow rate far exceeds that of other cables, because magnesium oxide powder has a better conductor coefficient than plastic, so the same operating temperature, the cut-off flow rate is greater, for lines above 16mm, one cross-section can be reduced, and two cross-sections can be reduced for places where human contact is not allowed.

  (3) Waterproof, explosion-proof, corrosion-resistant

  Since the cable is sheathed with low-smoke, halogen-free and high-flame-retardant materials, it has high corrosion resistance (the plastic outer sheath is only required in the case of corrosion by individual chemicals), and the conductors, insulation and sheaths are densely pressed together.Therefore, it not only has the ability to prevent the invasion of water, moisture, oil and some chemicals, but also is practical for the connection of various explosion-proof equipment and equipment in places where there is a risk of explosion.Recommended products: Power cable

  (4) Overload protection

  When the line is overloaded, the plastic cable will cause insulation to heat up or breakdown due to overcurrent or overvoltage.For mineral insulated cables, as long as the heating does not reach the melting point temperature of copper, the cable will not be damaged.Even if it breaks down instantly, the high temperature of magnesium oxide at the breakdown point will not form carbides.After the overload is cleared, the performance of the cable will not change, and it can continue to be used normally.