According to experts, the International Commission on Non-ionizing Radiation Protection stipulates that the safety value of power frequency electric field intensity to the public is 5000 V/m, and the limit value of power frequency magnetic induction intensity is 100 micro Tesla. However, the standards adopted in China are more stringent, with 4000 V/m and 100 micro Tesla as the safety standards for power frequency electric field and power frequency magnetic field respectively.
The measured power frequency electric field radiation value of the residential building closest to the high-voltage line is basically around 0. 1V/m, which is obviously lower than the national limit. The power frequency electric field and power frequency magnetic field at the other measuring position are 7.7V/m and 0.05 micro Tesla respectively, which are also far below the national standard.
Extended data
safe distance
Line and grounding
Under the condition of maximum calculated sag, the minimum distance between the line and the ground shall not be less than the following values:
The low-voltage line (380V) crosses residential areas not less than 6m, and the low-voltage line (380V) crosses non-residential areas not less than 5m;
The medium-voltage line (6- 10kV) crosses residential areas not less than 6.5m, and the medium-voltage line (6- 10kV) crosses non-residential areas not less than 5.5m..
The 35 ~ 1 10 kv line crosses residential areas not less than 7m, the 35 ~10 kv line crosses non-residential areas not less than 6m, and the 35 ~1/0 kv line crosses traffic difficult areas not less than 5m;
154 ~ 220kV lines shall pass through residential areas not less than 7.5m, 35 ~110kV lines shall pass through non-residential areas not less than 6.5m, and 35 ~1/0kV lines shall pass through areas with difficult traffic not less than 5.5m..
The 330 kV line crosses residential areas not less than 8.5 meters, the 35 ~ 1 10 kV line crosses non-residential areas not less than 7.5 meters, and the 35 ~1/0 kV line crosses traffic-difficult areas not less than 6.5 meters.
Regarding the safe distance between high-voltage lines and residential buildings, there is no clear distance regulation in China, but there is a related standard that can be converted: the magnetic induction intensity at the location of residential buildings.
The safe distance of high-voltage lines below 1kV is 4m;
1- 10kV high-voltage line with a safe distance of 6m;
The safety distance of 35- 1 10kV high-voltage line is 8m;
154-220kV high-voltage line safety distance is10m;
The safe distance along the 350-500 kV line is15m.
The line is far from residential areas.
From the perspective of power safety, and taking into account the wind deviation of high-voltage lines caused by strong winds, according to Article 5 of the Detailed Rules for the Implementation of the Regulations on the Protection of Power Facilities, "Overhead power line protection zone is a safe area that must be set up to ensure the safe operation of built overhead power lines and ensure the normal power supply of people's lives.
In densely populated areas such as factories, mines, towns, market towns and villages. The overhead power line protection zone is an area in two parallel lines formed by the sum of the horizontal distance after calculating the maximum wind deviation and the horizontal safe distance from the building after calculating the wind deviation. Under the condition of calculating the maximum wind deflection of voltage conductors at all levels, the horizontal safe distance from the building is as follows:
Under 1kV:1.0m;
1kV- 10kV: 1.5m，
35kV: 3.0m，
66kV- 1 10kV: 4.0m，
154kV-220kV: 5.0m，
330 kV: 6.0 meters,
500 kV: 8.5 meters.
The safe distance of high-voltage lines below 1kV is 4m;
1- 10kV high-voltage line with a safe distance of 6m;
The safety distance of 35- 1 10kV high-voltage line is 8m;
154-220kV high-voltage line safety distance is10m;
The safe distance of 350-500kV high-voltage lines is15m.
People's Network-Will living near high-voltage lines be harmed by electromagnetic radiation? deceiver
Baidu encyclopedia-high voltage line