Mineral Insulated Cable (MICC or MI cable), as a special type of cable, is widely used in all walks of life for its excellent fire resistance, corrosion resistance and transmission stability. This paper will introduce the structure, characteristics, application fields, market status and development prospect of mineral insulated cable in detail.
1. Structure and features
Mineral insulated cable is mainly composed of copper conductor core wire, magnesium oxide powder insulation layer and copper sheath (or aluminum sheath). Among them, the copper conductor core wire is used as the transmission medium of current, and the magnesium oxide powder is used as the inorganic insulating material to isolate the conductor and the sheath to ensure the electrical performance and safety of the cable. The outermost layer can be selected according to the needs of the appropriate protective sleeve, to further enhance the protection of the cable.
The characteristics of mineral insulated cable are mainly reflected in the following aspects:
(1) High fire resistance: Because the insulation layer is made of inorganic mineral materials such as magnesium oxide, mineral insulated cables can still maintain good insulation performance at high temperatures and effectively prevent fire. Its copper sheath will melt at 1083 ° C, and the mineral insulation can also withstand high temperatures above 1000 ° C.
(2) High corrosion resistance: seamless copper tube or aluminum tube as a sheath material, so that mineral insulated cable has a high corrosion resistance, can be used in harsh environments for a long time.
(3) High transmission stability: Mineral insulated cable has excellent transmission performance, suitable for long distance, high-speed data transmission and high voltage power transmission and other scenarios. It has large current carrying capacity, high short-circuit fault rating, and can transmit higher current at the same temperature.
(4) Long service life: due to its fire resistance, corrosion resistance and other characteristics, the service life of mineral insulated cables is relatively long, generally up to about 70 years.
2. Applications field
Mineral insulated cables are widely used in all walks of life, mainly including:
(1) High-rise buildings: used for general lighting, emergency lighting, fire alarm, fire electrical lines, etc., to ensure that the normal power supply can still be provided in emergency situations.
(2) Petrochemical industry: In potentially dangerous explosion areas, the high fire resistance and corrosion resistance of mineral insulated cables make them ideal.
(3) Transportation: airports, subway tunnels, ships and other places, mineral insulated cables are used for emergency lighting, fire monitoring systems, ventilation lines, etc., to ensure the safe operation of traffic facilities.
(4) Important facilities: such as hospitals, data centers, fire control rooms, etc., have high requirements for the stability of power transmission and fire performance, and mineral insulated cables are indispensable.
(5) Special environment: tunnel, basement and other closed, humid, high temperature environment, the cable fire resistance, corrosion resistance requirements are high, mineral insulated cable can meet these needs.
3. Market status and development prospects
With the increasing attention to fire safety, the market demand for mineral insulated cables is growing. Especially in renewable energy projects such as solar and wind, mineral-insulated cables are widely used due to their fire-resistant properties. It is forecast that by 2029, the global mineral insulated cable market size will reach $2.87 billion, with a compound annual growth rate (CAGR) of 4.9%.
In the domestic market, with the implementation of standards such as GB/T50016, the application of mineral insulated cables in fire lines has been mandatory, which has promoted the development of the market. At present, mineral insulated power cables occupy the main market share, and mineral insulated heating cables are also gradually expanding their application range.
4.Conclusion
Mineral insulated cable plays an important role in all walks of life because of its excellent fire resistance, corrosion resistance and transmission stability. With the continuous improvement of fire safety requirements and the rapid development of renewable energy projects, the market prospect of mineral insulated cables is broad. However, its high cost and installation requirements also need to be considered in the selection and use. In the future development, mineral insulated cables will continue to play their unique advantages for the power transmission and fire safety of all walks of life.
Post time: Nov-27-2024