YTTW metal sheath inorganic mineral insulation Fireproof cable Comparison with BTTZ mineral insulated cable and halogen-free low smoke fire-resistant cable
At present, there are two popular types of fireproof cables in the market:
BTTZ adopts a copper core mineral rim copper tube sheath structure. The advantages of this cable are that it is a non combustible cable due to the use of an all inorganic structure, and the service temperature of the cable can be increased to 250 ℃, protected by copper tube sheath, with radial waterproof and moisture-proof function. But it also has defects. First of all, it is not suitable for mobile occasions. Once the copper pipe is damaged, its insulation performance will decline rapidly, and at high temperatures, its insulation performance will decline sharply. Therefore, it is not suitable to be widely used in projects; Secondly, since magnesium oxide insulation is easy to absorb moisture, the requirements for longitudinal moisture resistance of the cable and protection from metal sheath damage are particularly important. The use of sealant at the end will seriously affect the service life of the cable; Moreover, the manufacturing process also limits the manufacturing length of the cable, resulting in an increase in the number of joints. The waterproof treatment of the joints is also very difficult. The insulation resistance is often unqualified due to water ingress at the joints.
Another Shandong Peninsula Cable Ltd., YTTW new type metal sheathed inorganic mineral insulated fireproof cable, which combines the advantages of mineral insulated cable and fireproof cable, overcomes their shortcomings, and can withstand external forces such as water spray, vibration, impact, etc.
Fire resistant organic insulated cables have not fundamentally improved their fire resistance characteristics. The basic reason is that the material of organic insulated cable has low combustion temperature (about 400 ℃), which is easy to burn. At the same time, it will produce a lot of heat during combustion, which has the role of combustion support. In addition, some types of cables will release smoke and toxic gases during combustion, which is not conducive to personnel escape, and is easy to cause secondary pollution to electrical equipment and other equipment. It is relatively cheap to use it in low floor buildings with low fire rating.
Metal inorganic mineral insulated fireproof cable Advantages of YTTW:
1. Excellent fire resistance, with fire resistance rating exceeding 950 ℃ of Class C specified in British standard BS6387-1994
~It is required to burn at 1000 ℃ for 1.5h, and at the same time, it can withstand water spray and mechanical impact during combustion.
2. The continuous production length is long, whether it is single core or multi-core cable, its length can meet the power supply length needs
Yes, the length can reach More than 2000 meters. No joints are required in the middle.
3. Large cross section, single core cable cross section can reach 630mm2, multi-core cable can reach 240 mm2.
4. It is flexible, and the cable can be coiled on the cable reel, with the bending radius ＞ 20D.
5. It is non-toxic and smokeless when burning, and does not produce any harmful gas after burning. It is an environmental protection and green product.
6. Large overload capacity. The cable not only has large current carrying capacity, but also has large overload capacity. Cable in case of overload
The allowable operating temperature of 250℃。
7. Good corrosion resistance. Inorganic mineral insulated fireproof cable adopts copper sheath, which is corrosion resistant
Good erodibility.
8. There is no electromagnetic interference. When cables are laid together with signal, control and other wires and cables, inorganic mineral insulation is used to prevent
The fire cable will not interfere with the signal transmitted by the signal line and control cable under the shielding of the copper sheath.
9. Good safety. In addition to normal power supply in the flame, the cable can start fire extinguishing equipment to reduce fire losses,
At the same time, it is also particularly reliable for personal safety. Its copper sheath is the best grounding wire, greatly improving the sensitivity and reliability of grounding protection.
10. The transportation and installation of inorganic mineral insulated fireproof cables are similar to ordinary cables, which are relatively simple.
11. Good economy. Inorganic mineral insulated fireproof cable has advanced manufacturing process, simple installation and the same quality Comprehensive cost ratio under conditions BTTZ mineral insulated cables are significantly reduced.
