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GATE 2023 Power Systems Quiz 44

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Question 1

Which of the following statement is NOT correct about insulator?

Question 2

The insulation resistance to a cable of length 20 km is 500kΩ. For a length of 100 km of the same cable the insulation resistance will be________?

Question 3

A string is made from two insulator discs of identical capacitance value C for a 22 kV, 50 Hz single phase overhead line insulation system. If the pin to earth capacitance is also C, then calculate the % string efficiency?

Question 4

Pin type insulators are not suitable for voltage level of _____?

Question 5

In a 3-Φ power system the ratio of shunt capacitance to mutual capacitance is 0.2. The string consists of 3 similar disc of insulators. The conductor having 11 KV voltage. Find the % string efficiency?

Question 6

In a three unit insulator sting, voltage across the lowest unit is 16.5kV and string efficiency is 85%. The total voltage across the string will be equal to ______ in V
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