ep19z13a

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Unformatted text preview: Zadania 253 13. OBWODY TRJFAZOWE Zad. 13-1. Okre l wskazania przyrz dw przyl czonych do danego symetrycznego odbiornika trj- fazowego, zasilanego napi ciem 3 230/400 V (do oblicze przyjmij: U f = 231 V i U = 400 V ). Wyznacz moc czynn i moc biern odbiornika. a) Dane: 5 , 115 = R , 200 = L X . Obliczenia do wykresu wskazowego : 231 2 2 2245 + = L X R Z , = arc o 60 tg 2245 R X L ; 231 3 2 1 = = = = Z Z Z Z , o 60 3 2 1 = = = = , 1 231 231 3 2 1 = = = = = Z U I I I f A. Wyniki : 1 3 2 1 = = = A A A I I I A; 4 , 346 2 1 1 400 3 cos 3 2245 = = I U P W; 600 2 3 1 400 3 in 3 = = = s I U Q var; wg wykresu wskazowego- 3 2 1 = + + = I I I I N , = AN I ; 5 , 115 2 1 1 231 1 = = W P W, 4 , 346 2 3 1 400 2- 2245 - = W P W. Rozwi zanie analityczne : 2245 + = + = 60 231 200 5 , 115 j L e j jX R Z ( ); 231 = Z , = 60 ; -- 2245 = 60 3 10 33 , 4 1 j e Z Y (S), -- 2245 = = = 60 3 3 2 1 10 33 , 4 j e Y Y Y Y (S); o 1 231 j e U = (V), o 120 2 231 j e U- = (V), o 120 3 231 j e U = (V), o 30 13 400 j e U- = (V); o 60 1 1 1 1 j e U Y I- 2245 = (A), o o 180 180 2 2 2 1 1 j j e e U Y I = 2245 =- (A), o 60 3 3 3 1 j e U Y I 2245 = (A), 3 2 1 = + + = I I I I N A; 1 3 2 1 = = = = I I I I A, = N I ; (VA), 00,0 6 4 , 346 692,8 3 3 60 3 3 2 2 1 1 3 2 1 j e e I U e I U e I U e I U e I U S j j j f j j j + 2245 2245 = = = + + = o czyli...
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