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工频电磁场广泛存在于各种工作环境中~([1]),其中电力行业的发电厂、变压站中的部分设备产生较稳定的工频电场或磁场~([2,3]),而汽车及其零部件等行业中存在的点焊设备则产生变化较大的工频磁场~([4])。针对目前100 kH z以下电磁场职业接触限值不完善的现状,课题组前期进行了卫生标准制(修)订项目《100 kH z以下电磁场职业接触限值》的研制,规定
Power frequency electromagnetic fields are widely used in a variety of work environments ([1]). Some of the power plants and transformer stations generate relatively stable industrial frequency electric or magnetic fields ([2,3]), Spot welding equipment in automobiles, parts and components, and other industries, produce large-frequency power magnetic fields (4). In view of the current imperfect occupational exposure limits for electromagnetic fields below 100 kH z, the research group conducted the research and development of the “Standards for the Occupational Exposure to Electromagnetic Fields Under 100 kH z”