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In a 33 kV overhead line, there are 3 units in the string of insulators. The voltage across the string is
- a)33 kV
- b)11 kV
- c)22 kV
- d)19.05 kV
Correct answer is option 'D'. Can you explain this answer?
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In a 33 kV overhead line, there are 3 units in the string of insulator...
Voltage across string = Phase voltag
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In a 33 kV overhead line, there are 3 units in the string of insulator...
Voltage across string of insulators in a 33 kV overhead line
The voltage across the string of insulators in a 33 kV overhead line is not equal to the line voltage.
Explanation:
- The line voltage is the voltage between the two conductors of the overhead line.
- In a 33 kV overhead line, the line voltage is 33 kV.
- The insulators are used to support the conductors and to prevent the flow of current to the ground.
- The insulators are designed to withstand a certain voltage and if the voltage exceeds this limit, the insulators may break down and current may flow to the ground.
- In a string of insulators, each insulator is designed to withstand a certain voltage.
- The voltage across the string of insulators is the voltage drop across all the insulators in the string.
- The voltage drop across each insulator is the same.
- In a 33 kV overhead line with 3 units in the string of insulators, the voltage across each insulator is 33/3 = 11 kV.
- Therefore, the voltage across the string of insulators is 3 x 11 kV = 33 kV.
- The correct answer is option 'D', which is 19.05 kV, is not correct as it is not equal to the voltage drop across each insulator or the voltage across the string of insulators.
The voltage across the string of insulators in a 33 kV overhead line is not equal to the line voltage.
Explanation:
- The line voltage is the voltage between the two conductors of the overhead line.
- In a 33 kV overhead line, the line voltage is 33 kV.
- The insulators are used to support the conductors and to prevent the flow of current to the ground.
- The insulators are designed to withstand a certain voltage and if the voltage exceeds this limit, the insulators may break down and current may flow to the ground.
- In a string of insulators, each insulator is designed to withstand a certain voltage.
- The voltage across the string of insulators is the voltage drop across all the insulators in the string.
- The voltage drop across each insulator is the same.
- In a 33 kV overhead line with 3 units in the string of insulators, the voltage across each insulator is 33/3 = 11 kV.
- Therefore, the voltage across the string of insulators is 3 x 11 kV = 33 kV.
- The correct answer is option 'D', which is 19.05 kV, is not correct as it is not equal to the voltage drop across each insulator or the voltage across the string of insulators.
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In a 33 kV overhead line, there are 3 units in the string of insulator...
Voltage across string = Phase voltag
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In a 33 kV overhead line, there are 3 units in the string of insulators. The voltage across the string isa)33 kVb)11 kVc)22 kVd)19.05 kVCorrect answer is option 'D'. Can you explain this answer?
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