What are the advantages of mineral cables compared to ordinary cables!
The durability and reliability of mineral cables are more advantageous than traditional cables. In addition, it also has fire resistance. The continuous working temperature is 250 ° C, and it can provide continuous power supply for 3 hours at 950 ° C-1000 ° C. It can work close to the melting point of copper at 1083 ° C in short or extraordinary periods. Due to its excellent performance, mineral insulated cables are suitable for circuits with rated voltages below 1000V.
Mineral cables have high current carrying capacity, waterproof, explosion-proof, corrosion-resistant, high working temperature, corrosion resistance, overload protection, and a longer service life than traditional cables.
- Main performance of mineral cables
(1) Fire resistance
Because mineral cables are all made of inorganic materials, they will not cause fires, cannot burn or support combustion, and will not produce toxic gases. Even with external flames burning, the cable can still function normally. After the fire is cleared, there is no need to replace the cables. This is a truly fire-resistant cable that provides a foolproof guarantee for fire circuits and has passed the IEC331 test.
(2) High current carrying capacity
Due to the normal operating temperature of mineral cables reaching 250, IEC60702 specifies a continuous operating temperature of 105 for mineral insulated cables. This is due to the requirements for terminal sealing materials and safety. Nevertheless, its cross-sectional flow rate is much higher than other cables. Due to the better conductivity of magnesium oxide powder compared to plastic, the cross-sectional flow rate is higher at the same operating temperature. For pipelines exceeding 16 millimeters, the cross-section can be reduced. For areas that do not allow human contact, cross-sectional flow can be reduced.
(3) Waterproof, explosion-proof, and corrosion-resistant.
The sheath made of low smoke, halogen-free, and highly flame-retardant materials has high corrosion resistance (plastic sheath is only required in rare cases of chemical corrosion), and the conductor and insulation are tightly compressed. Therefore, it can not only prevent the intrusion of water, moisture, oil, and some chemicals, but also be used in places with explosive hazards and for connecting various explosion-proof equipment.
(4) Overload protection
When the circuit is overloaded, the insulation of plastic cables will heat up or break down due to overcurrent or overvoltage. As for mineral cables, as long as the heat does not reach the melting point of copper, the cables will not be damaged. Even if breakdown occurs instantaneously, magnesium oxide will not form carbides at the high temperature of the breakdown point. After the overload is relieved, the cable performance will not change and can still be used normally.
(5) High working temperature
The melting temperature of magnesium oxide in the insulation layer is much higher than that of copper, and can reach a maximum normal operating temperature of 250 ℃. It can continue to operate at 1083 ℃, which is close to the melting temperature of copper, in a short period of time.
(6) Strong shielding performance.
Mineral cable sheath is a good shielding layer that can prevent interference from other cables and external magnetic fields.
(7) Long lifespan
Because it is an inorganic material, it will not age and has a service life of at least 100 years. Can be disassembled and reused with equipment relocation or line modification
