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Ç¥ÁعøÈ£ TTAK.KO-04.0183/R1 ±¸Ç¥ÁعøÈ£
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¿µ¹®Ç¥Áظí The Common Level Approach on a Countermeasure against Electromagnetic Interference by a Power Line with Broadcasting and Communications Services
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¿µ¹®³»¿ë¿ä¾à Basic technical principle is explained to help understand a general phenomenon of electromagnetic induction and the occuring mechanism of electromagnetic induction by a power line is also described.
The sort of induction voltage and limited voltage which is made of legal protection are presented. They are needed to practise a protection measure against power induction problem.
The basic formula for induction voltage calculation, the composition method of induced voltage corresponding to divided length terms of telecommunication line parallelized with a power line, mutual inductance to calculate effective electromagnetic coupling quantity between a telecommunication line and a power line, a general formula to calculate a shielding coefficient of conductive line length material which can have a reduction effect to induction are provided. All of these are common-level technical elements for induction voltage calculation by the types of voltages.
Finally, the framework of making countermeasures against induction problem is described.
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