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Q#1 Transmission and Distribution GATE EE 2001 MCQ +2 marks -0.66 marks

A 132 kV transmission line AB is connected to a cable BC.  The characteristic impedances of the overhead line and the cable are 400Ω and 80Ω respectively.  Assume that these are purely resistive. A 250 kV switching surge travels from A to B.        

(a) Calculate the value of this voltage surge when it first reaches C.

(b) Calculate the value of the reflected component of this surge when the first reflection reaches A.

(c) Calculate the surge current in the cable BC.

(a) 83.33 kV
(b) -166.67 kV
(c) 1.0416 kA

(a) -166.67 kV
(b) 83.33 kV
(c) 1.0416 kA

(a) 83.33 kV
(b) -166.67 kV
(c) 2.0416 kA

(a) 78.54 kV
(b) -166.67 kV
(c) 1.0416 kA

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