400kV输电线路和400kV变电站的极低频电场和磁场强度

K. A. Aravind, B. Krishna, D. Devendranath, I. Jha, B. N. D. Bhowmick, S. B. R. Rao, B. S. Kumar
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引用次数: 1

摘要

电磁波由电场和磁场组成,电场和磁场彼此成直角,并与波的运动方向成直角。频率和波长是电磁场的特征。在电磁波中,这两个特性彼此直接相关:频率越高,波长越短。极低频场的频率通常高达300赫兹。其他技术产生频率为300hz至10mhz的中频(IF)场和频率为10mhz至300ghz的射频(RF)场。电磁场对人体的影响不仅取决于电磁场的强度,还取决于电磁场的频率和能量。这些电场必须限制在各自频率范围内的规定值,以避免加热和触电等影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Extremely low frequency electric and magnetic field strengths of 400 kV transmission lines and 400kV sub-stations
Electromagnetic wave consists of an electric field and a magnetic field at right angles to each other and to the direction of the motion of the wave. Frequency and wavelength characterize an electromagnetic field. In an electromagnetic wave, these two characteristics are directly related to each other: the higher the frequency the shorter the wavelength. ELF fields generally have frequencies up to 300 Hz. Other technologies produce intermediate frequency (IF) fields with frequencies from 300 Hz to 10 MHz and radiofrequency (RF) fields with frequencies of 10 MHz to 300 GHz. The effects of electromagnetic fields on the human body depend not only on their field level but on their frequency and energy. These fields are required to be limited to the prescribed values in the respective frequency ranges in order to avoid the effects such as heating and electric shock.
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