BAZELE ELECTROTEHNICII PDF

Posted in: Bazele Electrotehnicii. Tagged: clamp , crowbar , diodele supresoare de tensiuni in regim tranzitoriu , Eclatoarele , ESD , GDT , Supresoarele ESD polimerice , varistoarele , varistoarele din oxid de metal , varistoarele multistrat. Leave a comment Aparitia supratensiunilor este o problema delicata, cu implicatii negative direct proportionale cu cresterea complexitatii si implicit a sensibilitatii dispozitivelor si echipamentelor electronice. Supratensiunile, de obicei tranzitorii, iau nastere din mai multe cauze, cum ar fi producerea in apropiere a unor descarcari electrice atmosferice fulgere ori a unor descarcari electrostatice — ESD Electrotstatic Discharge aparute la atingerea cu corpul uman, dar si regimul de functionare al echipamentelor electrice si electronice pot crea astfel de supratensiuni. Rezultatul este functionarea incorecta a sistemelor din care fac parte, dar, nu de putine ori, supratensiunile pot provoca distrugerea echipamentului in sine. Exista o serie de metode de a suprima supratensiunile, fiecare tip de amenintare fiind neutralizata cu un anume tip de dispozitiv, in functie de aplicatia utilizata.

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