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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 voltages and their limited voltages 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 voltages corresponding to divided length terms of telecommunication line parallelized with a power line, mutual inductance to calculate effective electromagnetic coupling quantity between telecommunication line and power line, a general formula to calculate a shielding coefficient of conductive line length material which can have a reduction effect to induction are presented. 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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