ExamA_2008 - Name: _ ECE 476 Exam #1 Thursday , October 9,...

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Name: ________________________ ECE 476 Exam #1 Thursday , October 9, 2008 Closed book, closed notes One note sheet allowed 1. ________ / 25 2. ________ / 25 3. ________ / 20 4. ________ / 15 5. ________ / 15 Total ________ / 100
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1. (25 points total) A new 3 phase, 60 Hz, 200 mile transmission line is to be built using Bluebird conductor. Bluebird conductor has an outside diameter of 1.762 inches; stranding of 84/19 (Al/St) yields a GMR for the conductor of 0.0588 feet. Resistance for each conductor is 0.0505 /mile. Bundling is to be used, with the three conductors per phase spaced symmetrically 1 feet apart. A horizontal tower configuration is used, with a distance of 25 feet between adjacent phases (i.e., 25 feet between the left and center phases, 25 feet between the center and right phases, and hence 50 feet between the left and right phases). Assuming that the line is uniformly transposed, draw the medium length Π -equivalent circuit for the line, showing the value of all parameters. For reference μ 0 = 4 π x 10 -7 H/m and ε 0 = 8.854 x 10 -12 F/m. There are 1609 meters per mile.
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2. (25 points total)
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This note was uploaded on 11/17/2011 for the course ECE 476 taught by Professor Overbye,t during the Fall '08 term at University of Illinois, Urbana Champaign.

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ExamA_2008 - Name: _ ECE 476 Exam #1 Thursday , October 9,...

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