BBTRZ cable is also known as flexible mineral-insulated fireproof cable.
Refers to the flame at 950 degrees Celsius high-temperature environment, through the 1KV voltage can be 180 minutes to maintain normal energization is not broken. It is a BTTZ mineral insulated cable improved model, inherited the BTTZ rigid mineral insulated cable fire, explosion-proof, temperature resistance, high current-carrying capacity, and other characteristics in addition.
Mineral insulated cable, a copper sheath-wrapped copper conductor core, and magnesium oxide powder as inorganic insulating material to isolate the conductor and the sheath of the cable, the outermost layer can be selected according to the need for appropriate protection sleeve.
Rigid mineral insulated cable was invented earlier, at the end of the 19th century. The Swiss engineer Arnold Francois Borel on the idea of mineral insulated cable, and received a patent in 1896, 1934-1936, France, and Britain into production after the rapid development.
China also developed in the 1960s, began to be used in the military field, the mid-1980s began industrial production, and was gradually accepted by the construction field in full.
The invention of flexible mineral-insulated fire-resistant cable is relatively late. About the 1970s was born in Switzerland at Stout Cable Company.