For high-voltage cables, there are mainly wires on poles and cables in underground pipes. We say that there are different types and conditions for laying high-voltage cables, such as underground, pipeline, tunnel, or overhead. For different laying methods, there are certain requirements for the selection of high voltage cables. The following small series introduces high voltage cable construction precautions and high voltage cable types for everyone.
High-voltage cable construction considerations
1. Tripods or cranes should be used for cables when loading and unloading vehicles. It is forbidden to push the ground directly by the vehicle, so as not to damage the cable shaft and damage the cable. After the cable is installed in the car, the cable must be firmly fixed with a strong rope, and the two-way mat is slanted so as to prevent rolling injury when the vehicle is braking midway or rolling uphill or downhill.
2. When laying cables, choose a solid flat ground cable shaft. The screw jack bracket used should be flexible. When the cable shaft is erected and dropped, it must maintain the vertical plane of the end face, and the axis of the cable reel must be parallel to the horizontal plane.
3. After the protective plate on the cable shaft is removed, put the nailed plates together to avoid pinching the nails. The remaining nails on the axle barrel should be handled well so as to avoid hanging clothes and hurting people.
4. When the old cable is cut off, it must be powered off, discharged, and inspected. Then, the cable core must be grounded and the work permit formalities must be handled. The core of the four-core cable should be disassembled. Prior to sawing, it must be compared with the drawing of the cable; check whether it is in fact true, use a detector to verify if conditions are met, and then use a grounded iron handle with a wooden handle or use a hacksaw with a grounding wire to screw into the cable core to work. Workers using hacksaws and iron braces should wear insulating gloves and stand on insulating mats. The grounding wire uses a copper wire with a cross-sectional area of ​​more than 10 mm2, and the grounding electrode can be driven into the ground with a round steel of 0.6 m or less.
5, laying optical fiber cable must be closely organized and have special instructions, traction process should have good contact means. After the placement of the optical fiber cable is completed, check whether the optical fiber is good. The end of the cable should be sealed against moisture and must not be submerged.
6. When the cable penetrates into the pipe or pipeline when it bends or intersects, the guiding device or horn protection pipe shall be used, and the outer sheath of the cable shall not be damaged. The length of the first drawing of the optical cable shall not exceed 1000 meters, and the length of the cable shall be ∞. Segmented traction.
7. Place the optical cable on the specified bracket and leave a proper margin to avoid too tight cable tension. The cable in the person (hand) hole where the joint is located shall meet the design requirements after being reserved. Reserved optical cable should be properly placed in the prescribed location.
8, the melting of insulating plastic must be set guard. Staff should bring linen canvas gloves and shoe covers. The melted insulating adhesive should be kept away from the hands of the opponent and should be laid flat when placed on the ground.
9. Do not stand under the irrigation cable head when it is in high altitude. Pedestrians are not allowed to enter the operating area. The operating site should be fenced and there is special supervision. The container containing the molten insulation must be tied with a strong rope. The staff above should slowly pull up and not touch the west. The staff below should be far enough away to avoid burns. When pouring in insulating glue, stand upwind.
10, in the preparation of epoxy resin cable head, to dry quartz powder, you must wear a mask. Epoxy resin adhesives should be prepared with protective glasses and medical gloves. The construction site must be well ventilated. The operator should stand upwind. When the skin is exposed to amine curing agents, rinse immediately with water or wipe with alcohol, and then wash with water. If you feel dizziness or fatigue, immediately leave the place of operation and breathe fresh air outdoors.
11. The work of digging the cable should be carried out by experienced personnel. When digging close to the cable protection board, shovels and iron braces should be disabled. After excavation to the protection board, guidance should be provided by experienced personnel to continue the excavation.
12. After digging out the cable or joint box, if the following needs to be hollowed out, the cable or joint box must be suspended and protected. When suspending the cable, it should be suspended every 1.0 to 1.5 meters. When suspending the joint box, it should be laid flat and the cables at both ends should be fixed. The joint must not be subjected to tension.
13. The mobile cable connector box must be powered off and moved horizontally by experienced personnel under the command of a special person. Both ends of the cable should be fixed together with the connector box to prevent tension.
14. The laying of optical cables must be closely organized and directed by special personnel. There should be good means of communication during the traction process. After the placement of the optical fiber cable is completed, check whether the optical fiber is good. The end of the cable should be sealed against moisture and must not be submerged.
High voltage cable type
The main types of high-voltage cables are YJV cable, VV cable, YJLV cable, and VLV cable.
YJV cable full name cross-linked polyethylene insulated PVC sheathed power cable (copper core)
VV cable full name PVC insulated PVC sheathed power cable (copper core)
YJLV full cross-linked polyethylene insulated PVC sheathed aluminum power cable
VLV cable full name PVC insulated PVC sheathed aluminum power cable
High voltage cable structure
Components of the high-voltage cable from the inside to the outside include: conductor, insulation, inner sheath, filler (armored), and external insulation. Of course, armored high-voltage cables are mainly used for ground-buried, which can resist the high-strength compression on the ground and prevent other external damage.
High voltage cable features
It uses high-frequency voltage doubler circuit, the first to apply the latest PWM high-frequency pulse width modulation technology, closed-loop adjustment, the use of a large voltage feedback, so that the voltage stability greatly improved. The use of high-performance IGBT devices and their drive technology, and according to electromagnetic compatibility theory, using special shielding, isolation and grounding measures. Makes the cable tester high quality, portable, and able to withstand the rated voltage discharge without damage.
Editor's summary: The high-voltage cable construction precautions and the types of high-voltage cables are introduced here, and we hope to help everyone. If you want to know more about yourself, you can follow the information on this site.
Cable high voltage cable
Honde group is an expert with exporting ecperience for 10 years and the fishing and solar combined system can make full use of ponds space, water in the ponds helps cool the photovoltaic modules, improving the effciency of power generation. Finshing and sloar combined system is widely used on the sea and we can supply a complete set Accessories for your fishing project.
Solar Mounting System For Fishing and Solar Combined
Ponds Solar Panel Mounting Brackets,Fishing Solar Panel Mounting Systems,Lake Solar Panel Mounting Systems
Hebei Honde Plastic & Metal Co., Ltd. , https://www.foundation-system.com