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Osnove elektrotehnike -skripta

Published by Zoran Peric, 2016-03-28 09:09:05

Description: Osnove elektrotehnike-skripta

Keywords: elektrotehnika

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Osnove elektrotehnike IVdio Page 21 of 21Snaga P [W] trofazne struje trošila spojena u trokut ili zvijezdu ista je u oba spoja i prikazana jejednadžbom gdje su napon U i struja I linijske veličine :P = 1,73 * U * I * cos φ [ W ]44. Zadatak: koliki je faktor snage cos φ ako je snaga trofaznog motora P =8,5 kW i nazivna struja I= 18 A?P = 1,73 * U * I * cos φ [W] Pcos φ =--------------------- = 1,73 * U * I 8500=-----------------------------------= 0,718 1,73 * 380 * 18mhtml:file://C:\Users\Zoran\Desktop\Elektrotehnika_teorija\Osnove elektrotehnike IV... 28.3.2016.


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