How does magnesium oxide improve cable safety?
Magnesium oxide significantly improves the safety of cables through its high fire resistance,excellent electrical insulation performance,and corrosion resistance.
Magnesium oxide significantly improves the safety of cables through its high fire resistance, excellent electrical insulation performance, and corrosion resistance. The following will provide a detailed introduction to how magnesium oxide improves various aspects of cable safety:
High fire resistance
High temperature resistance
Magnesium oxide has a very high melting point(2852℃), which enables cables insulated with it to operate stably in extreme high temperature environments. In the case of flame grilling, as long as the flame temperature is below the melting point of copper(1083℃), the cable can still be used after the flame is eliminated without producing toxic smoke and gas.
Complete fire resistance
Magnesium oxide cables do not burn on their own and can operate for a long time at 250℃. They can also maintain normal operation for 30 minutes at the extreme state of 1000℃, ensuring uninterrupted operation of important equipment in case of fire.
Excellent electrical insulation performance
Preventing current leakage
Magnesium oxide has good electrical insulation properties, and its high dielectric constant and low dielectric loss factor can effectively prevent current leakage and ensure the safe operation of cables. This performance ensures the stability and safety of the power system.
Extended service life
Due to the tight crystal structure of magnesium oxide, it can effectively prevent the conduction and leakage of electrons,greatly extending the service life of cables. Compared with traditional organic insulation materials, the inorganic properties of magnesium oxide make it less prone to aging and more durable.
Corrosion resistance
Chemical stability
Magnesium oxide has extremely high chemical stability and can resist corrosion from various chemical media such as acids, bases,and salts. In harsh chemical environments, magnesium oxide cables can maintain their original performance and structure without corrosion,aging, and other phenomena.
Anti corrosion effect
Magnesium oxide has a good anti-corrosion protection effect on the metal conductors in cables, which can neutralize acidic substances,prevent moisture from entering,and thus extend the service life of cables.
Overload protection capability
Preventing instantaneous breakdown
When the circuit is overloaded, as long as the heat does not reach the melting point temperature of copper, the magnesium oxide cable will not be damaged. Even if it breaks down instantly, the magnesium oxide crystal at the breakdown point will not form carbides, and the cable performance will not change after the overload is eliminated,allowing it to continue to be used normally.
Enhanced fire performance
Magnesium oxide cables do not produce toxic smoke and gas when exposed to flames, making them harmless to the environment and human health. This makes them of significant application value in the fields of fire protection and safety.
Mechanical performance
Enhanced mechanical strength
Magnesium oxide powder can fill the gap between the conductor and the sheath during cable manufacturing,enhancing the overall mechanical strength of the cable and making it more resistant to wear and pressure.
Improving flexibility
The addition of magnesium oxide can enhance the flexibility of cables,making them more flexible and easy to install and lay, especially in situations where bending is required.
In summary, magnesium oxide significantly improves the safety of cables through its high fire resistance, excellent electrical insulation performance, and corrosion resistance. These features not only ensure the stable operation of the power system, but also extend the service life of cables and reduce maintenance costs. In the future, continuing to explore and optimize the application of magnesium oxide in cables will provide more innovation and progress for improving cable safety.