The second floor of the newly purchased house is located in the south of the north city. However, there is a box-type transformer three to four meters to the east. Will it affect the health of the family and feng shui? Experts can give advice.
It depends on your safe distance. Generally, the radiation is very small, and there is no harm to people living with trace amounts of radiation. The following is specific information for reference.
Electromagnetic environment
Since 1998, the World Health Organization (WHO) has published different frequencies in the form of "International Electromagnetic Field Research Program" information release documents (Fact Sheets) in multiple languages. The official opinions on the impact of electromagnetic sources on public health respectively elaborate on the mechanisms and safety limits of the effects of exposure to electromagnetic sources of different frequencies on the human body.
The impact of the electromagnetic environment on biological systems depends on the wavelength (frequency) of the electromagnetic source and its energy. The higher the frequency, the greater the energy, and the greater the impact on the human body.
"Ionizing radiation" is extremely high-frequency electromagnetic waves (X-rays and γ-rays), which have enough photon energy to break the DNA chemical bonds in the genetic material molecules of cells, that is, to produce ionization.
"Non-ionizing radiation" is a general term for the lower frequency and energy portion of the electromagnetic spectrum, where the energy of photons is too weak to break chemical bonds between cell molecules. They include ultraviolet (UV) radiation and visible light waves, infrared waves, radio frequencies and microwaves, as well as extremely low frequency and stationary electric and magnetic fields. No matter how high the intensity of "non-ionizing radiation" is, it cannot cause ionization in biological systems.
Power transmission and transformation facilities will produce power frequency electric fields, magnetic fields, wireless signal interference and some noise. The main things that cause people to panic are electric fields and magnetic fields. When electrical equipment is powered on (that is, "voltage" is applied), its conductors carry low-frequency alternating charges, and a low-frequency electric field is formed between the conductors and the earth. The power frequency used in my country's power transmission and transformation projects is 50 Hz. In the field of electric power or power, the 50 Hz frequency is usually called "industrial frequency" and is an extremely low-frequency electric field.
In the environment around transmission lines or power facilities, electric fields and magnetic fields exist alone. They do not form effective electromagnetic energy radiation in the form of electromagnetic waves or form energy absorption in the body like high-frequency electromagnetic fields. Therefore, in the field of extremely low frequency environmental health effects, international authoritative organizations only involve the analysis of electric fields and magnetic fields, and do not use the general and vague concept of "electromagnetic radiation". No international authoritative organization will misuse the term "electromagnetic radiation" in this field. "This term.
In fact, my country’s environmental standards for electromagnetic fields in power transmission and transformation are more stringent than international standards. The exposure limit for power frequency electric field intensity promulgated by the international authoritative organization recommended by WHO to protect public health is 5 kV/m, and the exposure limit for power frequency magnetic field intensity is 0.1 mTesla; while my country's public protection limits The electric field is 4 kV/m and the magnetic field is 0.1 milltesla. In actual construction, it is often lower than these standards.
In fact, electromagnetic fields are everywhere in our lives. According to calculations, when we appreciate the beautiful moonlight or turn on the TV at home, the intensity of the electromagnetic field around us is much higher than that of power transmission lines. The earth itself also has a geomagnetic field. Comparing the geomagnetic field existing on the earth with the magnetic field generated by power transmission and transformation facilities, we can also draw interesting conclusions: the geomagnetic field data observed in Beijing is 54 microtesla. When the magnetic field During reversal, the maximum intensity is about 100 microTesla, which is 50 to 100 times the electromagnetic field of power transmission and transformation facilities. This shows that people living in electromagnetic fields of tens of microtesla have almost no feeling. Even the staff on duty 24 hours a day in the substation will not have their health affected. There is a transformer to the west of my house.
It is about 20 meters away from my house. It is used by more than 70 households. Will it pose any radiation hazard to my family?
Answer: If it is 20 meters away, there will be no radiation hazard. 4 kV/meter × 20 meters = 80,000 volts. Does the voltage of that transformer have 80,000 volts?