Whether the transformer has radiation
First of all, to clarify a concept to the public: in the electromagnetic
environment and public health, transformers, and other power
transmission and transformation facilities of "electric" and "magnetic
field", a "field" instead of "electromagnetic radiation".
Electromagnetic radiation is radio communication engineering and
electromagnetic compatibility of expertise in the field of a special
engineering terminology, refers to the phenomenon of energy in the form
of electromagnetic waves by the source launched into space, or refers to
the energy in the form of electromagnetic wave propagation in the
space. The "electromagnetic radiation" as a kind of environmental impact
factors refer to the electromagnetic environment in health is not
appropriate. Transmission facilities of equipment is for energy
transmission carrier, but not on the electromagnetic wave energy
transmission. In the transmission facilities around the "electric" and
"magnetic field", "electromagnetic field". ZG electric power automation
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Why the transformer power transmission facilities produce
electromagnetic radiation on the surrounding environment can not be
effective? This is because the power frequency magnetic field generated
by the AC power transmission and transformation facilities belong to
very low magnetic field through electromagnetic induction have an impact
on the surrounding environment. The power frequency electric field and
power frequency magnetic field frequency is only 50Hz, wavelength was
6000kM, and the transmission line itself, due to its length is much
smaller than the wavelength of the electromagnetic radiation, therefore
can not constitute a valid. At the same time, the magnetic field and
electric field frequency is independent of each other, is different from
the high frequency electromagnetic field. High frequency
electromagnetic radiation electric field and magnetic field is formed to
produce alternating forward propagation of electromagnetic energy. In
the international authority file, AC power transmission and
transformation facilities of electric field and magnetic field is
explicitly called for power frequency electric field, power frequency
magnetic field, and don't say electromagnetic radiation.
How to define the international authority of the electromagnetic field?
Power transmission and transformation facilities produce electromagnetic
radiation of inexact concept, have long been some domestic article
references and spread in the community, in a great extent increase the
misunderstanding and concerns of the public. The such as the World
Health Organization (who), the United States Environmental Health
Research Institute (NIEHS), international non ionizing radiation
protection committee (ICNIRP) and other authoritative environmental
health organizations and institutions, in the field of electromagnetic
environment and public health strict reference "electric and magnetic
fields" (to below 100 kHz), electromagnetic field (to 100 kHz and above)
or unified by EMF (electric field, magnetic field, electromagnetic
field) the term and refused the electromagnetic radiation is the
inappropriate concept.
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