Flame-retardant rubber-sheathed cables
1. Purpose
This product is a series of rubber-sheathed flexible cables for mining. It is suitable for power connection of coal shearers and similar equipment with rated voltage Uo/U of 1.9/3.3KV and below. Mostly used in coal mines.
2. Conditions of use
The long-term allowable operating temperature of the wire core is 65°C, and the minimum bending radius of the wire is 6 times the cable diameter. Yellow sheathed cables must not be exposed to sunlight for long periods of time.
Nuclear grade cable
Scope of application
·This product is suitable for control and signals used in the control system network of nuclear power plants with a rated voltage Uo/U of 0.6/1kV Connection cable.
·The allowable long-term working temperature of the cable conductor is 90°C. The maximum temperature of the cable conductor during a short circuit does not exceed 250°C and the duration does not exceed 5 seconds.
·The ambient temperature when laying cables should not be lower than 0℃.
·The allowable bending radius when laying cables is:
—Unarmored cables should be no less than 6 times the cable diameter
—Armored or Cables with copper tape shielding should be no less than 12 times the cable diameter
- Flexible cables with shielding structure should be no less than 6 times the cable diameter.
·When the long-term allowable operating temperature of the conductor is not greater than 90°C, the cable's certified life is not less than 40 years.
·The finished cable should comply with the Class A bundled combustion test requirements specified in the GB/T18380.3 standard.
·Smoke density of finished cable: transmittance is not less than 70.
·Radiation resistance: 25×104Gy
·Halogen-free: When non-metallic materials are burned, the acidity (expressed as PH value) of the evolved gas should be greater than 4.3; conductivity The rate is not greater than 10μS/mm.
Bare wires and bare conductor products
The main features of this type of products are: pure conductor metal, no insulation and sheath layers, such as steel-core aluminum stranded wires, copper-aluminum busbars rows, electric locomotive wires, etc.; the processing technology is mainly pressure processing, such as smelting, calendering, drawing, twisting/compression twisting, etc.; the products are mainly used in suburban areas, rural areas, user main lines, switch cabinets, etc.
Power cables
The products are mainly used for the transmission of strong electric energy in generation, distribution, transmission, transformation and power supply lines, and the passing current is large (tens of amps to thousands of amps). , High voltage (220V to 500kV and above).
Communication cables and optical fibers
With the rapid development of the communication industry in the past two decades, products have also developed at an alarming rate. From the simple telephone and telegraph cables in the past to thousands of pairs of voice cables, coaxial cables, optical cables, data cables, and even combined communication cables. The structural dimensions of such products are usually small and uniform, and require high manufacturing precision.
Magnetic wire (winding wire)
Mainly used in various motors, instruments, etc.
Flexible fireproof cable
1. Excellent fireproof performance, the fire resistance level not only meets the international GB12666.6A category 950℃ 90min, but also meets the British BS6387-1994 Class A 650℃ 3h B Grade 750℃ 3h Grade C 950℃ 3h requires that it can withstand water spray and mechanical impact during combustion.
2. Long continuous length. Whether it is a single-core or multi-core cable, its length can meet the power supply length needs, and the maximum length can reach 2000m.
3. The cross-section of single-core cable with large cross-section can reach 1000mm2. The cross-section of multi-core cable can reach 240mm2.
4. It is flexible and the cable can be coiled on the cable drum. Its bending radius is ≥20D, and D is the outer diameter of the cable.
5. It is smoke-free and non-toxic when burned. The insulation is made of inorganic material "non-combustible body". It will not produce any harmful gases when burned, and there will be no secondary pollution. It can be called an environmentally friendly green product. .
6. The cross-sectional capacity is too large. The cable not only has a large cross-sectional flow but also has a large overload capacity.
According to wiring requirements, the surface temperature of the cable is usually ≤70°C. If the wiring cannot be touched or is in contact with flammable building materials, the temperature of the cable sheath can reach 105°C. The allowable operating temperature of fireproof cables can reach 250°C when overloaded.
7. Corrosion resistance. Organic insulated fire-resistant cables sometimes need to be put through plastic pipes or iron pipes. Plastics are easy to age and become brittle, and iron pipes are easy to rust. Fire-resistant cables are copper sheathed and do not need to be put through pipes. Copper sheathing The sleeve has good corrosion resistance.
8. There is no electromagnetic interference. When fireproof cables are laid in the same shaft as signal and control wires and cables, the fireproof cables are shielded by copper sheaths and will not interfere with the information transmitted by signal or control wires and cables. cause interference.
9. It has good safety. In addition to providing normal power supply in flames, fireproof cables can activate fire extinguishing equipment and reduce fire losses. At the same time, it is also particularly reliable for personal safety. Its copper sheath is a good conductor and the best grounding wire. It is continuous to the entire length of the cable, which greatly improves the sensitivity and reliability of grounding protection.
10. Long service life. Inorganic insulation material is resistant to high temperatures and not easy to age. Its service life is many times longer than that of organic insulated cables. Under normal working conditions, its service life can be equal to that of a building.
11. The transportation and installation of flexible fireproof cables include installation.
New Products
Derivatives/new products of wires and cables are mainly made of new materials, It is produced by special materials, changing the product structure, improving process requirements, or combining different types of products.
Using different materials such as: flame-retardant cables, low-smoke halogen-free/low-smoke low-halogen cables, termite-proof, mouse-proof cables, oil-resistant/cold-resistant/temperature-resistant cables, etc.
Change the product structure such as: fire-resistant cables, etc.
Improve process requirements such as: medical cables, etc.
Combined products such as: OPGW, etc.
Convenient installation and Reduce equipment costs such as prefabricated branch cables, etc. Power system
The wire and cable products used in the power system mainly include overhead bare wires, busbars (bus bars), power cables (plastic cables, oil-paper power cables (basically replaced by plastic power cables), rubber sheathed wires cables, overhead insulated cables), branch cables (replacing some busbars), electromagnetic wires and electrical equipment wires and cables for power equipment, etc.
Information transmission
The wires and cables used in information transmission systems mainly include local telephone cables, television cables, electronic cables, radio frequency cables, optical fiber cables, data cables, electromagnetic wires, and power communications Or other composite cables, etc.
Instrumentation system
Except for overhead bare wires, almost all other products in this part are applied, but mainly power cables, electromagnetic wires, data cables, instrumentation cables, etc.