MI Cables
MI Cables
Mineral Insulated cables, or simply MI cables, are cables in which conductors or wires are enclosed by a metal jacket and insulated with hard-packed Magnesium Oxide (MgO). This basic construction provides high-temperature capability, exceptional electrical isolation, and physical protection for the conductors. It resists oxidation and enables precise measurement. As a specialized type of cable, it is used in high temperatures and especially harsh environmental conditions because it has low flammability, even when operating at high temperatures.
The mineral fillings in MI cables provide excellent non-reactive insulation, preventing the thermocouple wires from contact with each other or with caustic substances such as oils, solvents or water. This helps to ensure that the thermocouple probes remain accurate, critical in applications such as heat treating or sintering where the quality of the product could be adversely affected by temperature fluctuations.
The insulation in inner insulated cables does not burn, which makes it ideal for applications where fire could be catastrophic. Medical devices, power plants, and oil rigs are examples of places where installation of MI cables makes operations safer.
MgO has the characteristics of high temperature resistance and insulation, but MgO for MI cables needs to have higher specifications and undergo strict treatment. MgO is used to isolate the conductors from the external sheath and from each other. This is a great material to use due to its dielectric constant, rounded grain structure, high-temperature capability, and its chemical inertness.
IMC produces high grade MgO - ElectroMag for MI cables.
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ElectroMag is an electrical grade magnesium oxide with superior fine particles control and excellent chemical stability, moisture resistance and electrical insulation.
