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quiz4a - Monday Feb 12 2001 EE 381 Last Ft A 25 KVA...

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Unformatted text preview: Monday Feb. 12, 2001 EE 381 Last Ft: A 25 KVA, 24001940 V, 60 Hz, 2-winding transformer has the following given: H.V. side: R1 =1.7 ohms, X1= 2.6 ohms; LV. side: R2 = 0.0165 ohm, X2 = 0.0“)“ 1E- The core 103;]: at réted voltage is 120 watts. ,__————-—'—--...7\ f. 1. Find the %Regulation(neg1ecting the parallel branch) for 5411 load and 0.6 pfladll; O._ fl 2.: ’0 .da-L' ’91 24‘, £2}: {‘7 J- 0 0/59 x/o—a : 335‘11 39,, ~.—. 2.5 + 0 0234* ’‘0'11 ‘-= 53/4). I l 25-006 __ Leif-W " ‘5 "' ,2.qu - (’0 4/5 A- Pymar. . aux—m) = rs a. '34. JF‘ . ‘r-q o ,v V, ~— éfirn L; + H0 4/5/‘5-5‘f3 {3 3y +£- I) . '“h J' .: "92‘70 a '5 {-— - - " '4:- + J 5-9-79 r we - Q56 7 ,3 J“ 2. Find the efficiency at £4 fill! load and 0.8 power factor lagging. D . ': a. ‘1? h . fl =!___‘5:_QEL_yo.Q -.~ $0.50“ W 2.1. x/ 9 UM o ‘ LUNA. [(5 a J /C’¢_H "' ’20 ("I \ 5 la. 5. d .7. ’0' [“6 ,4. 5*" ”Lag. 1.. n W . LL ()(aow ’VCO - Mk]: 3 3f *1 23' 7ft“ - fl” \ c/ / ‘° ' ta; . {~— 4_ a 6 0 G /{ £{la ‘ [Y .011) ...
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