I YTTW (BTTW) metal sheathed inorganic mineral insulated cable Structure of
one Cable conductor: stranded copper wires, with good bending performance
two Insulation layer: high temperature resistant and non combustible inorganic insulation material
three Copper sheath: copper material, with good bending characteristics after special processing, can be used as PE wire.
four Outer sheath: low smoke, halogen-free and flame retardant plastic material with good corrosion resistance
III YTTW Fire resistant copper characteristics of (BTTW) metal sheathed inorganic mineral insulated cables
one According to the national standard, the fire resistance characteristic test of wire and cable combustion test method GB12666.6
A Class A burns at the flame temperature of 950 ℃, and 750V voltage is applied between phases and between phases and the outer protective conductor. The insulation is not damaged for 90min.
B Class A burns at the flame temperature of 750-800 ℃, and 750V voltage is applied between phases and between phases and the outer sheath. The insulation is not damaged for 90min.
two According to British BS6387, Flexible fireproof cable It can meet the following requirements:
A Grade 650 ℃ 3h
B Grade 750 ℃ 3h
C Grade 950 ℃ 3h
S Grade 950 ℃ 20min
IV YTTW Advantages of (BTTW) metal sheathed inorganic mineral insulated cable
one Excellent fire resistance. The fire resistance rating not only meets the national standard GB12666.6 Class A 950 ℃, 90min, but also meets the requirements of British BS6387-1994 Class A, 650 ℃ 3h; Class B 750 ℃ 3h; Class C 950 ℃ 3h requirement; At the same time, it can withstand water spray and mechanical impact during combustion.
two The continuous length is long, whether it is single core or multi-core cable, its length can meet the demand of power supply length, and each continuous length can reach more than 1000 meters;
three Large cross-section, single core cable cross-section can reach 630mm2, multi-core cable cross-section can reach 240mm2;
four With flexibility, the cable can be coiled on the cable reel, and its bending radius is 6-10D, (D is the outer diameter of the cable)
five When burning, it is smokeless and non-toxic. It is made of inorganic materials (non combustible materials), which will not produce any harmful gas and secondary pollution, so it can be called an environmental friendly green product;
six The overload capacity is large. The cable not only has a large current carrying capacity, but also has an excessive overload capacity. According to the wiring requirements, when the surface temperature of the cable is generally ≤ 70 ℃, if the wiring cannot be touched or contacted with combustible building materials, the temperature of the cable sheath can be increased to 105 ℃. When overloaded Fireproof cable The long-term working temperature can reach 250 ℃.
seven Corrosion resistant, organic insulated fire-resistant cable sometimes needs to pass through plastic pipe or iron pipe. The plastic pipe is prone to aging and embrittlement, and the iron pipe is prone to rust. The fire-resistant cable has a copper sheath and does not need to pass through the pipe. The copper sheath has good corrosion resistance;
eight There is no electromagnetic interference. When the fireproof cable is laid in the same shaft with the information and control wires, it will not interfere with the information transmitted by the signal and control wires and cables under the shielding of the copper sheath;
nine Good safety. The fireproof cable can supply power normally in the flame, start the fire extinguishing equipment, reduce fire losses, and is particularly reliable for life safety. Its copper sheath is an excellent conductor, the best grounding PE line, and continues to the full length of the cable, greatly improving the sensitivity and reliability of grounding protection.
ten Long service life, high temperature of inorganic insulation material, and not easy to aging, its service life is many times higher than that of organic insulation cable, and under normal working conditions, its service life can reach more than 100 years;
eleven Packaging, transportation, installation and accessories of flexible fireproof cables are similar to ordinary cables, which are relatively simple;
twelve Good economy. Due to advanced manufacturing technology and simple installation, the comprehensive cost of flexible fireproof cable is significantly lower than that of mineral insulation under the same conditions.
V YTTW (BTTW) Electrical characteristics of metal sheathed inorganic mineral insulated cables.
one Rated voltage: 750V
two Rated working voltage: light load 500V, heavy load 750V;
three Rated current: single core 25A-1800A, multi-core 16A-500A;
four Insulation resistance: insulation resistance ≥ 1000M Ω· km. The cable length is less than 100m, and the insulation resistance is ≥ 10000M;
five Voltage test: 500V cable applies 2000V AC voltage, 0.6/1kV cable applies 3500V AC voltage, the duration of applying AC voltage is 15min, and the duration of applying AC voltage to the whole panel (circle) is 5min.
VI YTTW (BTTW) Manufacturing standard for metal sheathed inorganic mineral insulated cables
Construction Industry Standard of the People's Republic of China JG/T313-2014
Metal sheathed inorganic mineral insulated cable and terminal with rated voltage of 0.6/1kV and below
VII YTTW Application scope of (BTTW) metal sheathed inorganic mineral insulated cable
one Power supply for fire-fighting equipment and fire elevators in various buildings.
two Power supply for equipment and lighting system in important buildings or densely populated buildings.
three Places with high ambient temperature, such as steel plants, smelters and other equipment power supply.
four Power supply for equipment in important inflammable and explosive occasions, such as petrochemical industry, smelter, etc.
five Places requiring special sanitation, such as hospitals, schools, video factories and other power supply equipment.
six Power supply for important military, national defense, aerospace and health base equipment.
7. Power supply for important equipment such as power plant and nuclear power plant.
