Can high voltage line mine
1. Bare high-voltage wire can help the line heat dissipation, if buried in the ground with insulation layer, it will increase the thickness and increase the power consumption
High voltage lines need to have a safe distance, which can be solved by erecting a high tower in the air, and the cost of insulation layer can be saved. If buried underground, not only the cost will be increased, but also more safety factors will be considered, especially the leakage problem, which has a greater hidden danger The cost can be greatly reced by using air insulation, and enough safety distance can be kept between the tower and peoplethe location of high altitude can most reasonably meet the marking of safety distance: the safety distance of high voltage line below 1kV is 4m; The safe distance of 1-10kv high voltage line is 6m; The safe distance of 35-110kv high voltage line is 8m; The safe distance of 154-220kv high voltage line is 10m; The safe distance of 350-500kv high voltage line is 15m
extended data:
according to Article 5 of the detailed rules for the implementation of the regulations on the protection of electric power facilities, the overhead power line protection area is a safety area that must be set up to ensure the safe operation of the built overhead power lines and the normal power supply of people's life
in densely populated areas such as factories, mines, towns, market towns and villages, the overhead power line protection area is the area within two parallel lines formed by the sum of the horizontal distance of the conctor side line after the maximum calculated wind deviation and the horizontal safe distance from the building after the wind deviation. Under the condition of calculating the maximum wind deviation of the conctor, the horizontal safe distance from the side line of voltage conctor at all levels to the building is as follows:
1kV: 1.0m; 1kv-10kv: 1.5m; 35kV: 3.0m; 66kv-110kv: 4.0m; 154kv-220kv: 5.0m; 330kV: 6.0m; 500kV: 8.5m
High voltage power transmission can not find an effective insulating material to make the outer insulation layer of wires. Therefore, high voltage wires are bare and cannot be buried underground
Secondly, there are distributed capacitors around the wire, and the current can leak out through these capacitors, which increases the consumption on the one hand; On the other hand, if there are any animals close, there is also the risk of electric shock. Air is an insulator, but earth is a conctorit's different in the air. As long as the wires are directly set up in the air, some medium contact can be avoided. However, in the underground, a layer of insulating shell should be added to the wires, otherwise the leakage problem can't be solved
It is stipulated in the safety work regulations of
extended data
that the high voltage of equipment to ground is higher than 250V, the low voltage is lower than 250V, the safety voltage is 36V, and the safety current is lower than 10mA. Interpretation (2001) No. 3 defines 1kV as the starting point with high risk to the surrounding environment, while 10kV is used for power operation
Most of the high-voltage distribution lines in urban areas with10kV adopt conctors with insulation skin, but even if there is insulation skin, one or several porcelain bottles are needed to insulate the poles or towers
For the high voltage transmission lines with voltage35kV and above, bare conctors are used, and more porcelain bottles are used for insulation e to different voltage levels. You can see this directly by looking at the lines around you
e to the different pollution levels in different regions, the number of porcelain bottles in the porcelain bottle string of the same voltage level in different regions is also different
The reason is that most of the fishing rods are made of carbon steel, which can conct electricity. There must be water in the fishing place. If the fishing rod is wet, it will conct electricity more easily
the length of the fishing rod ranges from 3.6m to 7.2m. Under the high-voltage line, when lifting the rod, the end of the fishing rod is likely to touch the high-voltage line. By at least 8000 volts of high-voltage electricity, the chance of survival is very low
in order to avoid the occurrence of electric shock accidents caused by power line sagging, we should strengthen the investigation, and organize personnel to carry out "pull net" investigation on key lines such as fish ponds and ditches within the jurisdiction, so as to eliminate potential safety hazards
by setting up safety warning signs of "no fishing under high-voltage lines" and issuing leaflets on safe use of electricity, we publicized the electric power laws and regulations to the people and fishermen in the past, as well as the dangers and precautions of fishing under power lines, and reminded the people to establish safety awareness and prevention awareness, so as to avoid the occurrence of electric shock accidents
organize special personnel to wait for fish ponds, reservoirs, rivers, etc. near the line, timely stop offline fishing, ensure fishing safety, and create a safe and stable atmosphere for power supply and consumption
extended data:
the minimum distance between the line and the ground should not be less than the following values in the case of maximum calculated sag:
the minimum distance between the low-voltage line (380V) passing through the residential area should not be less than 6m, and the minimum distance between the low-voltage line (380V) passing through the non residential area should not be less than 5m
medium voltage line (6-10KV) passing through residential area is not less than 6.5m, medium voltage line (6-10KV) passing through non residential area is not less than 5.5m
It is not less than 7 meters for 35-110kv lines to pass through residential areas, not less than 6 meters for 35-110kv lines to pass through non residential areas, and not less than 5 meters for 35-110kv lines to pass through areas with traffic difficulties No less than 7.5m for 154-220kv lines passing through residential areas, no less than 6.5m for 35-110kv lines passing through non residential areas, and no less than 5.5m for 35-110kv lines passing through areas with traffic difficulties No less than 8.5m for 330kV lines passing through residential areas, no less than 7.5m for 35-110kv lines passing through non residential areas, and no less than 6.5m for 35-110kv lines passing through areas with traffic difficulties(2) the minimum distance of line conctors within the group shall not be changed, buildings and structures shall not be built in the overhead line protection zone, plants that may endanger the safety of power facilities shall not be planted, and articles that may endanger the safety of power facilities shall not be stacked
(3) before carrying out construction work that may endanger the safety of power facilities in the power facilities protection zone, it is necessary to file with the safety department of the unit and the safety and environmental protection proction department of the group, and go through the approval proceres with the power management department of the local government (National Development and Reform Commission or bureau of instry and information technology) according to the law. The work can only be carried out after the approval of the power management department and taking safety measures< (4) the following measures should be taken to protect the power facilities and personal safety when the construction is approved in the power facilities protection area:
1. Set up fixed and obvious boundary signs and danger warning signs at the boundary of the overhead line protection area (the line protection area is within 20m outside the side line) to remind the construction personnel, It is not allowed to cross the boundary and enter the line protection area for construction
2. For construction work in and near the overhead power line protection zone, set up on-site safety guardians and warning signs. For construction work in and near the line protection zone, use large mechanical vehicles such as cranes and excavators, and inform the group safety management department and power facilities property rights unit 3 days in advance for on-site supervision, so as to ensure that the power facilities are not damaged, Ensure no illegal operation
3. The height limit sign or protective fence shall be set at the place where large machinery and vehicles with a height of more than 4 meters enter and leave the line protection zone, so as to ensure that there is no accident of high-voltage line discharging to vehicles causing casualties and tripping power failure
5. The safety warning signs and warning signs set up by each unit in the high-voltage line protection zone in the area shall not be damaged or displaced
6. In cloudy days, thunderstorms, snows, fogs, gales and other bad weather conditions, all construction must be stopped, and construction personnel are forbidden to stay within 10 meters of the foundation tower
7. At the operation site and after the completion of the operation, all wastes and coverings should be compacted or cleaned to avoid short circuit and electric shock caused by wind
8. The power lines used in the construction shall not be erected on the supports of high-voltage iron towers, all construction personnel shall not climb the supports of high-voltage lines, and it is forbidden to throw objects at the high-voltage lines
9. The foundation of the tower should not be landfilled. The foundation of the tower should be 0.2m above the ground. 10. The grounding of the tower should not be damaged at will, it must be effective and feasible
(5) relevant units and construction units often conct training and ecation on the safety of construction workers working under high-voltage lines and construction safety; Carry out inspection and ecation on the compliance with laws and regulations on power facilities protection, improve the awareness of construction workers to consciously protect personal safety and power facilities safety, accept the inspection of the construction site by the power department and relevant units of the group, and timely rectify the proposed requirements. If the rectification cannot be carried out on time, the assessment will be carried out in accordance with the relevant provisions of the group
(6) for the line facilities within the group, the relevant units shall bear the corresponding responsibility for the line tripping, power facilities damage and personal injury caused by the violation of the laws, regulations and rules on the protection of power facilities by employees or construction personnel ring the construction period.
and in order to rece the loss in the transmission process, the high-voltage electricity generally adopts the transformation mode, which generally reaches the level of 10000 v. moreover, if it is a continuous high voltage, there will be a continuous large current. In case of encountering it, it will be burnt directly
then there is the magnetic field. What is the safe distance of the high voltage line
the electromagnetic radiation intensity of 220 kV high-voltage line is more than 0.4 micro Tesla within 100 meters
the electromagnetic radiation intensity of 132kV high-voltage line is more than 0.4 micro Tesla within tens of meters
the electromagnetic radiation intensity of 11-66 kV high-voltage line is more than 0.4 micro Tesla within ten meters
the electromagnetic radiation intensity of the buried high-voltage line is more than 0.4 micro Tesla within a few meters
then you decide whether to stay away from the high voltage line
the safe distance should be at least 10 meters,,,
what happened when the underground high-voltage line could be shaken up on the ground, but could not be shaken down
the high-voltage line of 120 shakes infinitely on the ground. Why can't it shake up after being put underground for a few days
No
Article 53 of Chapter 7 of the electric power law of the people's Republic of China stipulates that no unit or indivial is allowed to build buildings or structures that may endanger the safety of power facilities in the power facilities protection zone designated according to law
Article 10 of Chapter II of the regulations on the protection of electric power facilities stipulates that the 35 kV to 110 kV overhead power line protection zone is an area in two parallel planes formed by the conctor side line extending 10 meters horizontally to the outside and perpendicular to the ground
extended data:
precautions:
in order to ensure the safety of construction and transmission line, we need to take isolation and protection measures for high-voltage line, set up a double row scaffold under the high-voltage line, and the upright pole of scaffold is φ forty-eight × 3.5 steel pipe, bottom - 250 × 30% of wood material
on the side of the high-voltage line, a 3000mm high dense mesh protective net is set up outside the scaffold near the j-axis to protect the high-voltage line on the side. The safety fence shall be fixed on the fence with 18 ᦇ iron wire
1. Article 10 power line protection area:
(1) overhead power line protection area: the area in two parallel planes formed by the lateral line of the conctor extending horizontally to the outside and perpendicular to the ground, In general areas, the side line extension distance of voltage conctors at all levels is as follows:
1-10kv 5m
35-110kv 10m
154-330kv 15m
500kV 20m
in densely populated areas such as factories, mines and towns, the area of overhead power line protection zone can be slightly smaller than the above regulations. However, the extension distance of voltage conctor sidelines at all levels shall not be less than the sum of the horizontal distance of conctor sidelines after the maximum calculated sag and maximum calculated wind deviation and the safe distance from buildings after wind deviation< Article 15 Any unit or indivial in the overhead power line protection zone must abide by the following provisions:
(1) no grain, grass, garbage, slag, inflammables, explosives or other articles affecting the safety of power supply shall be piled up< (2) it is not allowed to burn kilns or wasteland< (3) no building or structure shall be built< (4) plants that may endanger the safety of power facilities shall not be planted.