BTMMRZ mineral insulation flexible fire protection Cable
1、 Purpose
Rigid mineral insulated cable was invented early. Arnold Francois Borel, a Swiss engineer, put forward the idea of mineral insulated cable at the end of the 19th century and obtained the * * * right in 1896. It developed rapidly after France and Britain put it into production in 1934-1936. Our country also developed it in the 1960s and began to use it in the military field. In the mid-1980s, it began industrial production and was gradually accepted by the construction field as a whole. The invention of flexible mineral insulated fireproof cable is relatively late, which was born in the 1970s in Stuart Cable Company, Switzerland. The company began to study flexible mineral insulated fireproof cable in 2010, and launched flexible mineral insulated fireproof cable in 2012. Due to the defects in reliability, production and laying of rigid mineral insulated cables, they are gradually withdrawn from the market in developed countries in Europe and the United States. Flexible mineral insulated fireproof cables have become the mainstream cable products in the field of fire protection.
2、 Features
Compared with traditional rigid mineral insulated cable, flexible mineral insulated cable is composed of copper stranded wire, mineral compound insulation and mineral compound sheath. It adopts flexible structure, and the main materials are inorganic materials, which make up for the defects of hard structure, easy combustion, toxicity, etc other The cable does not have advantages, such as fire resistance, large current carrying capacity, shock voltage resistance, mechanical damage resistance, halogen-free, explosion-proof, waterproof, corrosion resistance, long service life, safety, overload resistance, high temperature resistance, low cost, etc.
3、 Main functions
General Wire and cable Because the insulation is made of polymer materials of agricultural production system, it is easy to carbonize under flame conditions, thus losing the insulation effect. As the main material of flexible mineral insulated fireproof cable (BBTRZ) is composed of mineral compounds, it will not cause fire itself, and it is impossible to burn or support combustion. These materials generally have a high melting point of more than 1500 ℃, so the fireproof cable can play a normal power transmission function even when it is used in flame conditions, which is a real fireproof cable. It can also pass BS6387 C, W and Z tests.
