Control cable is insulated from each other by the one or more root conductor insulation and protection layer made of outsourcing, will power or transmit information from one place to another wire. Can also say that control cable is the medium of metal for signal transmission devices. Usually by crossing a control cable or at least two groups of wires in each strand rope made of a similar control cable between each wire insulation, and often twisted around a center into the entire outside package with a high degree of insulation cover.
Wire and control cable is used for electric power, telecommunications and related materials transport purposes. “Wire” and “cable” and not strictly limits the cable. Usually small number of core products in diameter, simple structure of the product known as the wire, not insulated as bare wires, the other called the cable; conductor cross-sectional area larger (more than 6 mm2) as a large wire, small (less than or equal to 6 mm2) as a small wire, insulated wire, also known as wire cloth.
Control cable is mainly used for transmission control, such as measuring signal control cable. Apply to industrial and mining enterprises, energy and transportation sector, for 450/750 V AC rated voltage under control, the protection line and so the use of PVC insulated, PVC sheathed control cable. Flame-retardant control cable description: flame retardant control cable is suitable for industrial and mining enterprises, energy and transportation sector, for rated voltage of 450/750 volts AC under control, and protection lines near such occasions to use the PVC insulation, PVC jacket control cable.
Here are notes about control cable. Power cables and control cable should not be configured on the same level bracket. High and low voltage cables, strong, weak control cable should be ordered layered configuration, in general, should top-down, but more than 35kv high voltage cable with the introduction of counter plate, in order to meet the bend radius, can be configured below. The cable trench method of laying cables and buried cable installation method is similar to, and can be placed on the pulley groove, cast completed, the cable put in the ditch, or bracket, and cable lashing cable plate. Cable fixed on cable channel and the tunnel wall, the level of equipment, when the cable diameter should be equal to or less than 50mm every 1m-plus-one support; diameter greater than 50mm of the cable at intervals of 0.6m-plus-one support; arranged triangular single cable, at intervals of 1m fasten bandage application, the vertical device, at intervals of 1 ~ 1.5m to be fixed.
Power cables and control cable should not generally be laid in the same bracket, the less and when the cable, control cable and power cable will be laid within the same bracket, the application of separate partitions. Tunnel and trench length shall be fitted with a continuous earth wire, grounding wire should be connected with all the support, two and grounding connectivity. Grounding line must also comply with design requirements. Lead sheathed cable package and in addition to insulation requirements, should be fully connected and and ground wire connected to the cable rack and ground should be painted or galvanized anti-rust paint.
Cable laying equipment, which commonly used? Air compressor is mainly used to destroy the road, the laying of cables in preparation for the future; electrical hoist, or cable pulling machine is mainly used to drag the cable;control cable conveyor, with a huge tractor used to overcome friction, reduce damage to the cable ; cable set-off bracket; wheel device; anti-twist, cut rope appear distorted; cable disc brakes; tension meter.
Wire and control cable is used for electric power, telecommunications and related materials transport purposes. “Wire” and “cable” is not strict boundaries. Usually small number of core products in diameter, simple structure of the product known as the wire, not insulated as bare wires, the other called the cable; conductor cross-sectional area larger (more than 6 mm2) as a large wire, small (less than or equal to 6 mm2) as a small wire, insulated wire, also known as wire cloth.
Include bare wire and cable, magnet wire and electrical insulating electrical wires, power cables, communication cables and optical cables.
Several control cable can be introduced metal materials. Copper: conductivity second only to silver, thermal conductivity second only to gold and silver; anti-corrosion, non-magnetic, plastic good, easy welding, widely used. Copper alloy of copper is mainly to improve the wear resistance, corrosion resistance and mechanical and physical properties. Silver: metal conductivity and thermal conductivity maximum, with good corrosion resistance and oxidation resistance, easy-to-weld; mainly used for coating and the cladding layer; mainly used for high temperature wire and (Note: According to the theory of skin effect) with do high-frequency communications cable conductor. Aluminum: conductivity second only to silver, copper, gold; thermal conductivity, good corrosion resistance, mechanical strength general, plastic is good, a small proportion. Drawback is the low tensile strength, not easy to weld. Aluminum alloy is mainly to improve the mechanical strength, heat resistance and solderability. Gold, nickel: used as high temperature wire. Iron (steel): Often the strengthening of composite conductor materials such as aluminum over steel core wire, copper clad steel, aluminum clad steel wire. Zinc: used steel / steel / iron conductor coating to prevent corrosion with. Tin: used wire / copper coating, using to prevent corrosion, and facilitate the copper wire.