Do you know mineral insulated cables?
In today's society, fire safety is receiving more and more attention, especially the fire resistance of cables. As a new type of fireproof cable, mineral insulated cable has been widely used in various industries for its excellent fire resistance, corrosion resistance and transmission stability.
The structure and characteristics of mineral insulated cables are mainly composed of copper conductor core, magnesium oxide powder insulation layer and copper sheath (or aluminum sheath). Among them, the copper conductor core is used as the transmission medium of current, and magnesium oxide powder is used as inorganic insulation material to isolate the conductor from the sheath to ensure the electrical performance and safety of the cable. The outermost layer is to select an appropriate protective sheath according to the needs to further enhance the protection ability of the cable. The characteristics of mineral insulated cables are mainly reflected in the following aspects:
1. High fire resistance: Since the insulation layer uses inorganic mineral materials such as magnesium oxide, mineral insulated cables can still maintain good insulation performance at high temperatures and effectively prevent fires. Its copper sheath will only melt at 1083℃, and the mineral insulation layer can also withstand high temperatures above 1000℃.
2. High corrosion resistance: Seamless copper tube or aluminum tube as sheath material makes mineral insulated cables have high corrosion resistance and can be used for a long time in harsh environments.
3. High transmission stability: Mineral insulated cables have excellent transmission performance and are suitable for scenarios such as long-distance, high-speed data transmission and high-voltage power transmission. It has a large current carrying capacity and a high short-circuit fault rating, and can transmit higher currents at the same temperature.
4. Long service life: Due to its fire resistance and corrosion resistance, the service life of mineral insulated cables is relatively long, generally up to about 70 years.
With the continuous improvement of people's awareness of fire safety and the continuous maturity of mineral fire-resistant cable technology, the market demand for mineral insulated cables has shown a rapid growth trend. In many fields such as industry, construction, and transportation, the requirements for the fire resistance of cables are becoming more and more stringent, which provides a broad market space for mineral insulated cables. In industrial production sites such as petrochemicals, steel smelting, and power generation, the fire safety of cables is extremely important. Mineral insulated cables have excellent fire resistance and stability, can maintain normal operation in high temperature environments, and effectively reduce the risk of fire. Moreover, in construction projects such as high-rise buildings, commercial complexes, and tunnels, mineral insulated cables can withstand harsh environmental conditions and provide buildings with long-lasting and reliable power transmission and fire protection.
In short, as a safe, environmentally friendly and durable fireproof weapon, mineral insulated cable plays an important role in all walks of life with its excellent fire resistance, corrosion resistance and transmission stability. Its excellent fire resistance and stable electrical performance bring more safety and convenience to our life and production. With the continuous improvement of fire safety requirements and the rapid development of renewable energy projects, the market prospects of mineral insulated cables are broad. However, its higher cost and installation requirements also need to be comprehensively considered when selecting and using it. In the future development, mineral insulated cables will continue to play their unique advantages to escort power transmission and fire safety in all walks of life.
