Chapter 4: Q2MCQ (page 220)
Question:Overhead transmission-line conductors are bare with no insulating cover.
(a)True
(b)False
Short Answer
Answer
The correct option is (a) True.
Chapter 4: Q2MCQ (page 220)
Question:Overhead transmission-line conductors are bare with no insulating cover.
(a)True
(b)False
Answer
The correct option is (a) True.
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Get started for freeConsider a symmetrical with sub conductors arrange in a Circle of radius. The inductance of a single-phase symmetrical bundle-conductor line is given by
Where is given byconductor radius, anis approximately the distancebetween the bundle centers. Note thatis related to the sub conductor spacingin the bundle circle by
Now consider a, single-phase, bundle-conductor line with eight sub conductors per phase, phase spacing, and the sub conductor spacing. Each sub conductor has a diameter of. Determine the line inductance in.
The Aluminum Electrical Conductor Handbooklists a dc resistance of per at and a resistance of role="math" localid="1655275109672" per mile at for the all-aluminum Marigold conductor, which has 61 strands and whose size is . Assuming an increase in resistance of 2% for spiraling, calculate and verify the dc resistance. Then calculate the dc resistance at , and determine the percentage increase due to skin effect.
Considering lines with neutral conductors and earth return, the effect of earth plane is accounted for by the method of _______ with a perfectly conducting earth plane.
Question:In deriving expressions for capacitance for a balanced three-phase three wire line with equal phase spacing, the following relationships may have been used.
(i) Sum of positive-sequence charges,
(ii) The sum of the two line-to-line voltages is equal to three times the line-to-neutral voltage Vbn.
Which of the following is true?
(a) Both
(b) Only (i)
(c) Only (ii)
(d) None
A transmission-line cable with a length of consists of 19 strandsof identical copper conductors, each in diameter. Because of thetwist of the strands, the actual length of each conductor is increased by . Determine the resistance of the cable if the resistivity of copper is at data-custom-editor="chemistry" .
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