Description
A wire made of one or more mutually insulated conductors and an outer insulating protective layer that transmits power or information from one place to another. A cord-like cable, usually composed of several or groups of wires (each group of at least two) twisted together, each group of wires insulated from each other, and often twisted around a center, the entire outer coating is highly insulated. The cable has the characteristics of internal power and external insulation. 1. Dc cable (1) Series cables between components and components. (2) The parallel cable between the series and the series to the DC distribution box (bus box). (3) Cable between DC distribution box and inverter. The above cables are DC cables, outdoor laying more, need to moisture-proof, anti-sun, cold, heat, UV resistance, some special environment also need to prevent acid and alkali and other chemical substances. 2. Ac cable (1) Connection cable from inverter to booster transformer. (2) The connection cable between the booster transformer and the distribution device. (3) The connection cable between the distribution device and the power grid or the user.
Common code Usage code - not marked as power cable, K- (control cable), P- (signal cable); Conductor material code - not labeled copper (can also be labeled CU), L- (aluminum); Inner sheath code -Q- (lead), L- (aluminum), H- (rubber), V- (polyvinyl chloride sheath), the inner sheath is generally not identified; Outer cover code -V- (polyvinyl chloride), Y- (polyethylene power cable); Derived codes -D- (non-dripping), P- (dry insulation); Special product code -TH- (Hot and humid zone), TA- (Dry tropical zone), ZR- (flame retardant), NH- (fire resistant), WDZ- (low smoke halogen free, enterprise standard).
species
Flame-retardant rubber sheathed cable
1. Use
This product is a flexible cable series for mining use. It is suitable for power connection of shearer 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 working temperature of the wire core is 65 ° C, and the minimum bending radius of the wire is 6 times the diameter of the cable. Yellow-sheathed cables should not be exposed to sunlight for a long time.
Nuclear grade cable
Scope of application
• This product is suitable for control and signal connection cables used in the control system network of nuclear power plant with rated voltage Uo/U of 0.6/1kV.
• The allowable long-term operating temperature of the cable conductor is 90 ° C, and the maximum temperature of the cable conductor in the case of short circuit shall not exceed 250 ° C, and the duration shall not exceed 5 seconds.
• The ambient temperature when laying the cable should not be lower than 0℃.
• The allowable bending radius during cable laying is:
- No less than 6 times the diameter of the unarmored cable
- Cables with armor or copper tape shielding should not be less than 12 times the diameter of the cable
- Flexible cables with a shielded structure should be no less than 6 times the diameter of the cable.
• When the conductor's long-term allowable operating temperature is not greater than 90 ° C, the identified life of the cable is not less than 40 years.
• The finished cable shall meet the requirements of Class A bunch-burning test specified in 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 of the escaping gas (expressed in PH value) should be greater than 4.3; Conductivity is not greater than 10μS/mm.
Flexible fireproof cable
1, excellent fire performance, fire resistance grade not only meet the international GB12666.6A class 950℃ 90min can also meet the British BS6387-1994 provisions of A class 650℃ 3h B class 750℃ 3h C class 950℃ 3h requirements at the same time in the combustion also withstand water spray and mechanical impact.
2, continuous length whether it is a single-core or multi-core cable, its length can meet the needs of the power supply length, and the limit length can reach 2000m.
3. The cross section of large single-core cable can reach 1000mm2. The cross section of multi-core cable can reach 240mm2.
4, with flexibility, the cable can be disc on the cable tray, its bending radius ≥20D, D is the cable diameter.
5, smokeless and non-toxic combustion, insulation using inorganic materials "no combustion body", combustion will not produce any harmful gases, but also will not occur secondary pollution, can be called environmental protection green products.
6, the section capacity is too large, the cable not only has a large section flow and has a large overload capacity. Usually cable surface temperature ≤70℃ according to wiring requirements? What if the wiring is not touchable? And not in contact with combustible building materials? The temperature of the cable sheath can reach 105℃. The allowable working temperature of the fireproof cable can reach 250℃ when overloaded.
7, corrosion resistance, organic insulated refractory cable sometimes need to wear plastic pipe or iron pipe, plastic is easy to age brittle, iron pipe easy to rust; Fireproof cable is copper sheath does not need to wear pipe, copper sheath corrosion resistance is good.
8, no electromagnetic interference, fireproof cable and signal, control and other wires and cables in the same shaft laying. The fireproof cable is shielded by a copper sheath. Won't signal? Control the transmission of wire and cable information interference.
9, good safety, fire cable in addition to the normal power supply in the flame, start the fire extinguishing equipment, reduce fire losses. At the same time, it is particularly reliable for personal safety, and its copper sheath is a good conductor, which is the best grounding wire, and it is continuous to the full length of the cable, which greatly improves the sensitivity and reliability of grounding protection.
10, long service life, inorganic insulating materials, high temperature resistance, and not easy to age, his life is many times higher than that of organic insulated cables. Under normal working conditions, its life can be equivalent to that of a building.
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