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Določitev najvišje vrednosti ozemljitvene impendance transformatorskih postaj in določitev napetosti dotika v odvisnosti od trajanja toka okvare : študija št. 2291
Strmec, Jure ...
V študiji so obdelani novi postopki in načini projektiranja ozemljitvenih sistemov TP, ki jih v svojih zahtevah navajajo standardi s tega področja. Glavna sprememba napram obstoječim, ustaljenim ...postopkom dimenzioniranja ozemljitvenega sistema je določitev najvišje vrednosti ozemljitvene impedance TP z združeno obratovalno in zaščitno ozemljitvijo. Ta je sedaj posredno določena z novo krivuljo dopustne napetosti dotika NN omrežja, kateri je dodana dodatna, strožja krivulja dopustnih napetosti dotika v NN električnih inštalacijah stavb. Sama vrednost najvišje ozemljitvene impedance TP z združeno obratovalno in zaščitno ozemljitvijo ni več strogo določena na osnovi dviga potencialnega lijaka celotnega ozemljitvenega sistema ob enofaznem zemeljskem stiku v SN omrežju, temveč na podlagi realnejših pričakovanih tveganj z naslova napetosti dotika.
Type of material - treatise, study
; adult, serious
Publication and manufacture - Ljubljana : Elektroinštitut Milan Vidmar, 2015
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