Are not all substations suitable for power frequency electric field detection

The power transmission and transformation power frequency Qingli electric field strength is used to measure the strength of the electric field at a certain point in the space around the power transmission and transformation facilities. Unit of measure.

is kilovolt meters (kv m). Electric fields around electrical facilities. When the electrical equipment is connected to the power supply (i.e., the voltage is added or called live), the power frequency electric field is formed when the space around the device is delayed.

How big is the power frequency electric field and power frequency magnetic field around the substation?

The occupational exposure limit of power frequency electric field in China is 5kV m.

The National Catalogue of Occupational Diseases does not specify occupational diseases that can be caused by exposure to power frequency electric fields.

Regarding occupational health examinations: It is not that occupational health examinations are required to achieve what value of the test is achieved.

China's "Technical Specifications for Occupational Health Monitoring" (the current version is GBz188-2007) stipulates the purpose, principles, scope, items, categories and other contents of occupational health examination.

The current Technical Specifications for Occupational Health Monitoring do not explain the occupational health examination of power frequency electric fields.

There is no limit to this, and you can have a physical examination if it exists.

The safety distance of the 110kV high-voltage line is 100 meters, and the radiation of the substation is larger, but 200 300 meters is also a safe distance. It has little impact on adults, and the smaller the child, the greater the impact, and the chance of leukemia is greater than that of ordinary people. The divergent is also a straight line, and when it is reflected by metal, it has nothing to do with whether the building is blocked or not.

The radiation of the power frequency electric field belongs to the divergent type, which cannot be said to have absolutely no impact on the human body, but the harm is absolutely less than that of other types of electromagnetic radiation flying in the sky, which can be ignored.

Belongs to the wave style! It's definitely okay to be that far away!

Power frequency electricity is a unified standard voltage for the power industry and electrical equipment stipulated by the state.

The power frequency voltage of single-phase power supply in China is 50 Hz and 220V. The power frequency voltage of the three-phase power supply is 50 Hz 380V, due to the imbalance of industrial development around the world and the influence of colonial control during World War II, there is no unified standard for power frequency voltage in the world, and the countries are different and the regions are very different.

According to the laws of physics, the higher the voltage, the smaller the resistance transmission loss, so the current transmission is transmitted through high voltage, for example, China's high-voltage transmission voltage is 500kv, 220kv, etc., it is impossible to use 220V or 110V for long-distance power transmission. At the destination, it is connected to civil or industrial use through several stages of transformers.

Power frequency voltage refers to the unified standard voltage of the power industry and electrical equipment stipulated by the state. Power frequency: refers to the frequency of the AC power supply used in industry, in hertz (Hz); The power frequency voltage of single-phase power supply in China is 50 Hz, 220V, and the power frequency voltage of three-phase power supply is 50 Hz and 380V.

Power frequency current is one of the types of current, and it is also one of the most dangerous currents, which has a great harmful effect on the human body.

The power frequency electromagnetic field, referred to as the electric field, is generated by voltage and strengthens as the voltage increases. The unit of electric field strength is volts per meter (v m); The magnetic field is generated by the electric current passing through a wire or appliance and increases as the current intensity increases. The unit of magnetic field is Gaussian (g) or Tesla (t).

Power Frequency Electromagnetic Fields (EMFs) are "force" lines that surround any kind of electrical equipment that are invisible to the naked eye. Power lines, wires, and electrical equipment all generate power frequency electromagnetic fields (EMFs). There are many other electrical appliances around people that generate power frequency electromagnetic fields (EMF), such as televisions, hair dryers, refrigerators, computers, etc.

Once most electrical appliances are turned on, current will pass through and a magnetic field will be generated. The electric field is present at all times, even when the appliance is turned off, but as long as it is connected to the power supply. Brief pulses of electromagnetic fields (sometimes referred to as transient phenomena) can also occur the moment an appliance is turned on and off.

1] Electric fields can be shielded or weakened by electrical conductor materials, which can even be undesirable conductors, including trees, buildings, and people. However, magnetic fields can penetrate most of the matter, so it is difficult to shield them out. However, both the electric and magnetic fields decay rapidly as the distance from the source increases.

Characteristics of electromagnetic fields: The properties of electromagnetic fields are determined by their wavelength, frequency, and amplitude (intensity).

A country has a country's power frequency electricity, China is 50 Hz 220 volts AC voltage for the power frequency voltage, Japan is 60 Hz,

Look at how the electrical work is done, if there is a welding machine operation, it is easy to affect the power frequency signal.