1. Rated voltage of mineral insulated cable; light load (BTTQ, BTTVQ, WD-BTTYQ) 500V and heavy load (BTTZ, BTTVZ, WD-BTTYZ) 750V.

2. Test voltage of finished products of mineral insulated cables; light load 2000V/1min, heavy load 2500V/1min.

3. The insulation resistance of mineral insulated cables should be greater than 1000MΩ. When the cable length is less than 100m, the insulation resistance should be greater than 10000M.

4. Long-term working temperature of mineral insulated cable; long-term working temperature of mineral insulated cable is 70℃, mine in untouched places The long-term working temperature of the insulated cable is 105℃. In special high-temperature occasions, the long-term working temperature can be 250℃ and below. in 950-1000 ℃ can continue to supply power for more than 3h, short-term or very short-term operating temperature can reach 1083 ℃.

Since all the materials of this cable are made of inorganic materials, it has some advantages that other cables cannot have. Such as fire prevention, large current capacity, resistance to mechanical damage, halogen-free and non-toxic, explosion-proof, waterproof, corrosion-resistant, long life, safety, overload resistance, high temperature resistance, low cost, small bending radius, ant proof, rat bite proof, copper protection Set as protective ground wire and other characteristics.

In addition to the national standard cable (rigid), all other flexible mineral cables are enterprise standards. Relatively speaking, the national standard cable technology is high, the construction is complicated and rigorous, because the metal sheath itself is extremely difficult to bend, the installation difficulty is the highest, and it requires expensive special accessories, and the fire resistance is also the highest BS6387; and flexible cable installation and ordinary cable Similar, the construction threshold is low, but the fire performance is also up to BS6387. In the application, the matching products are mainly selected according to the fire protection level and importance of the building.