TECHICAL Series MATHEMATICS • INFORMATICS • PHYSICS Series PHILOLOGY Series ECONOMIC SCIENCES Sereies EDUCATIONAL SCIENCES Series LAW AND SOCIAL SCIENCES Series
The Numeric Calculation of the Magnetic Stationary Field in the Current ? Limiting Circuit Breaker's Arcing Chamber of 1250A, 800V
(Calculul numeric al cāmpului magnetic staţionar īn camera de stingere a īntreruptorului limitator de 1250 A, 800 V)
Vol LIX • No. 2/2007
Elena Otilia Vīrjoghe, Mihail Florin Stan, Marcel Ionel, Diana Enescu
Universitatea Valahia din Tārgovişte, Bd. Regele Carol I, 2, Tārgovişte
e-mail: otiliavirjoghe@yahoo.com

 Keywords   arcing chamber, optimization, numeric calculation.

 Abstract
The direct current is mainly obtained by rectifying the alternating current with power diodes and thyristors, so with semiconductor devices, which have a small thermal capacity. Therefore, it's necessary that direct current installations to be protected by very fast fuse or power switches, fast, capable of limiting the amplitude and duration of the shortcircuit current. For this the current limiting circuit breakers are conceived as elaborated solutions especially for the arc quenching system, meaning the path of current and the arcing chamber.
In this paper the authors present few optimization solutions of some quenching systems which will lead to more performant constructive choices.

 Rezumat
Energia electrică īn curent continuu se obţine in principal prin redresarea cu diode şi tiristoare de putere, deci cu dispozitive semiconductoare care poseda o capacitate termică redusă. Ca urmare, este necesar ca instalaţiile de curent continuu să fie protejate cu sigurante de putere ultrarapide (SUR) sau īntreruptoare de putere, rapide, capabile să limiteze curentul de scurtcircuit ca amplitudine şi durată. Pentru aceasta intreruptoarele limitatoare sunt concepute ca soluţii elaborate īn special īn ceea ce priveşte sistemul de stingere, adică calea de curent si camera de stingere.
Īn lucrarea de faţa autorii prezintă cateva soluţii de optimizare a unor sisteme de stingere care sa conducă la variante constructive mai performante.



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