Frequently Asked Questions from TANO CABLE

According to Tano Cable products classify, there are four common types of flexible cable. These include rolling flexible cable, bending flexible cable or "tic-toc," torsional flexible cable and variable/random motion flexible cable. Variable flexible cable include rubber cable and welding cable.

Tano Cable Flexible Cable meet various standards. Flexible Cable may be UL Listed, CSA certified, CE marked and/or meet military specifications. However, every flexible cable is different, so make sure to specify if your flexible cable needs one or more standards to be met.

Flexible Cable applications are to withstand the extreme stress of flexing and motion. A few applications include: drag chain applications, applications with repetitive bending and torsion stress, machine tools, data processing equipment, robotics, assembly lines, automation networking, microprocessor and computer interconnects and many more.

Unlike ordinary fixed installation cable, flexible towline cable should pay attention to the following eight rules: 1. You must pay attention to the minimum bend radius of the flexible towline cable. 2. Flexible towline cable can not twist within laying, that is the cable can not be unfasten from one end of the cable reel or cable drum, and it should rotate the reel or drum to expand the cable, if necessary, cable can be expanded or suspended. 3. The flexible cables in towline must not touch each other or bundled together. 4. If towline break, the flexible cables in it which also need to be replaced because of damage caused by excessive stretching can not be avoided. 5. Flexible cables must be laid loosely side by side in the towline, and apart as far as possible, separate with septa or isolated penetration stent in separator holes, in towline flexible cable voids between the cables should be at least 10% of cable diameter. 6. Under the circumstance of meeting same electrical requirements, the diameter of flexible cable is smaller than other similar cable, with lighter weight. Flexible cable bending performance is very good, the minimum bend radius could be up to 5 times of cable diameter. 7. Two ends of flexible cable must be fixed, or at least at the movement end of the towline must be fixed. Mobile Point of flexible towline cable distance from the ends should be 20-30 times of the cable diameter. 8. Flexible towline cable is fully mobile within the bend radius can not be forced to move. Or between each other so that the cable between the guide means and movable relative. After a period of operation, it is best to check the position of the cable. Tano Cable supply many kinds of flexible cables with high quality, welcome any inquiry!

Factories, the countryside erection of overhead bare conductor cable should note the following requirements: 1. If overhead bare conductor cables are arranged vertically, the distance between lines to be bigger than the horizontal arrangement, because the wire swinging up and down swing is larger than the horizontal. Such as the prescribed distance between 6KV overhead bare conductor arranged vertically is 1m, it is 0.7m horizontally. 2. On the same poles, set up both copper bare conductor cable and aluminum bare conductor cable, then the copper bare conductor cable should be erected on top. Because the thermal expansion coefficient of aluminum bare conductor is larger than copper, the vertical distance can be maintained between copper bare conductor and aluminum bare conductor when copper bare conductor cable on the top. 3. The minimum cross-sectional of overhead bare conductor cable, copper bare conductor is 6mm2, aluminum bare conductor is 16mm2. The requirement is due to considering the mechanical strength of bare conductor. 4. Bare conductor cables used in the same section must match “3 Same”, that is the same material, the same type and the same size. Neutral line cross section allows 50% smaller than phase line, but the material and the type should be corresponding to the same phase. 5. It had better to use concrete poles, because of its high mechanical strength, good corrosion resistance, and it’s cheap. Cross arm should use angle iron cross arm, because the angle iron cross arm with a durable, high strength and easy installation features. 6.  When installing overhead bare conductor cable, zero line should be erected below the phase line. Due to the zero line cross-sectional area is generally smaller than the phase line, easily disconnected due to wind and other factors, it will not come into contact with the phase line, that is, the zero line is not in danger of high voltage. 7. Overhead bare conductor cable is better to use multiple strands, do not use single strand. Due to mechanical strength of multiple strands is good. 8. Overhead bare conductor cable can’t be connected by welding method, for bare conductor will be annealed under heating welding so that the mechanical strength will decline.

There are two kinds of electric transmission lines are used currently, one is the most common overhead transmission line, which generally uses non-insulated bare conductor through the ground towers stand as a support, it will lead to the suspension tower with insulators; another is power cable transmission line, which producing by a special process, laying underground or laid in cable tunnel. Transmission capacity and transmission distance of transmission line are all related to voltage. The higher voltage the farther can deliver. Voltage of lines and the system needs to be determined by distance and capacity of its delivery. 1. Overhead transmission line   Overhead transmission line are made up of route line towers, conductors, insulators etc., set up above the ground. Conductor is made of metal with good conductivity, enough wide cross section (to maintain proper through-flow density) and a larger radius of curvature (to reduce corona discharge). EHV transmission line usually use bundled conductors. Overhead ground wire (also called lightning-protection line) disposed above the transmission line for protecting line against lightning. Important transmission lines use two overhead ground wires commonly. Insulator chain concatenating by single suspension (or rod) insulator,  which need to meet the dielectric strength and mechanical strength requirements. The number of insulator is determined by the transmission voltage levels. Towers are made of steel or reinforced concrete, is the main support structure of overhead transmission line. Overhead line construction and maintenance is more convenient and lower cost. Overhead transmission lines should take into consideration of natural conditions when design, such as temperature changes, strong storms, lightning, rain, ice, floods, wet fog etc. The path of overhead transmission lines need sufficient width and ground clearance corridor. The decided maximum transmission power of transmission line, after considering all the factors of technical, economic and other factors, called the transmission capacity of the overhead transmission line. Transmission capacity substantially proportional to the square of the transmission voltage. Therefore, improving the transmission voltage is the main technical means to achieve high capacity or long-distance transmission, also is the main indicator of transmission technological development level. At home and abroad (including American and European countries) commonly use overhead transmission lines as the most important way to supply electric power. 2. Power cable transmission line Power cables are generally composed of conductor, insulation and protection layers, there are single core power cable, 2 cores power cable and 3 cores power cable. Power cable transmission line generally used in areas where overhead transmission lines erection difficulties, such as city or special cross section. Currently used power cable transmission line, mainly considering the urban landscape and line security. But the cable line troubleshooting and repair time is very long, effect the power grid reliability and normal use of electricity users seriously. Therefore, in power grid construction, the power cable transmission line total replace of overhead transmission lines can not be achieved. Power Cable Transmission Line Features: (1) Reliable power supply. (2) Save space and ground. (3) Don’t use poles, saving wood, steel and cement. (4) Easy operation and maintenance, save line maintenance cost. (5) Power cable is expensive, difficult branch lines, cable connectors construction process more complicated, more difficult to find the point of malfunction, inconvenience promptly deal with the accident.