In a string of three identical suspension insulators units supporting a transmission line conductor, if the...
In a string of three identical suspension insulators units supporting a transmission line conductor, if the self-capacitance of each unit is denoted as ‘C’ farads, the capacitance of each connector pin to ground can be taken as 0.1 C farads. Determine the voltage distribution across the string, if the maximum permissible voltage per unit is given as 20 kV. Determine the string efficiency. Derive the formula used to calculate the string efficiency with a neat sketch where ever required
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In a string of three identical suspension insulators units
supporting a transmission line conductor, if the...
A three-phase overhead transmission line is being supported by three-disc suspension insulators; the potentials across the...
A three-phase overhead transmission line is being supported by three-disc suspension insulators; the potentials across the first and second insulator from the top are 8 kV and 11 kV respectively. Calcualte (i) the line voltage (ii) the ratio of capacitance between pin and earth to self capacitance of each unit (iii) the string efficiency
A string of suspension insulators consists of three units. The capacitance between each link pin and earth is one-sixth of the self-capacitance of each unit. If the maximum voltage per unit is not to exceed 35 kV, determine the maximum voltage that the
A string of suspension insulators consists of three units. The capacitance between each link pin and earthis one-sixth of the self-capacitance of each unit. If the maximum voltage per unit is not to exceed 35 kV,determine the maximum voltage that the string can withstand. Also calculate the string efficiency.[84·7 kV; 80·67%]
Q1. i). A 3 phase transmission line is supported by 3 suspension insulators. The capacitance of...
Q1. i). A 3 phase transmission line is supported by 3 suspension insulators. The capacitance of pin to earth is half of the capacitance of disc. Estimate: i Ratio of voltage across discs ii. String Efficiency [1.5] [0.5] For the same transmission line, if number of discs are increased to 4. Estimate: i. Ratio of voltage across discs ii. String Efficiency [1.5) [0.5] ill). What is the change observed in above cases (i & ii)? iv). What can be done...
a) Three insulators forming a string of insulators has a self-capacitance of C farads. The capacitance...
a) Three insulators forming a string of insulators has a self-capacitance of C farads. The capacitance from the metal joints to the earth is 0.2C Farads. Calculate the string efficiency of the arrangement. b) Discuss the relationship of string efficiency on the voltage distribution of Insulators. Can string efficiency value be 100% practically? Justify your answer.
THESE ARE THE QUESTIONS FROM THE SUBJECT POWER SYSTEM FUNDAMENTALS AND THE CHAPTER IS MECHANICAL DESIGN...
THESE ARE THE QUESTIONS FROM THE SUBJECT POWER SYSTEM FUNDAMENTALS AND THE CHAPTER IS MECHANICAL DESIGN OF TRANSMISSION LINES . THE ANSWERS ARE GIVEN WITH THE QUESTION PLEASE DO ALL THE QUESTIONS PROPERLY ..DONOT SKIP ANY STEP AND DO YOUR BEST 5. A string of 4 insulators has self-capacitance equal to 4 times the pin-to-earth capacitance. Calculate (i) the voltage distribution across various units as a percentage of total voltage across the string and (ii) string efficiency. [(i) 14·5%, 18·1%,...
power system A single-circuit 60-Hz high voltage power transmission line is 370 km (230 mi) long....
power system
A single-circuit 60-Hz high voltage power transmission line is 370 km (230 mi) long. The conductors are Rook with flat horizontal configuration and 7.25 ms=(23.8 ft.) conductor spacing. The load on the line is 125 MW at 100% power factor. Use attached Tables A3 to A3to determine; The sending end voltage Vs The sending end current Is The sending end power Ps The percentage voltage regulation The transmission efficiency Given that Ds for the Rook conductor is 0.0327...
Q1. i). A 3 phase transmission line is supported by 3 suspension insulators. The capacitance of pin to earth is half of the capacitance of disc. Estimate: i Ratio of voltage across discs ii. String Efficiency [1.5] [0.5] For the same transmission line, if number of discs are increased to 4. Estimate: i. Ratio of voltage across discs ii. String Efficiency [1.5) [0.5] ill). What is the change observed in above cases (i & ii)? iv). What can be done...
power system
A single-circuit 60-Hz high voltage power transmission line is 370 km (230 mi) long. The conductors are Rook with flat horizontal configuration and 7.25 ms=(23.8 ft.) conductor spacing. The load on the line is 125 MW at 100% power factor. Use attached Tables A3 to A3to determine; The sending end voltage Vs The sending end current Is The sending end power Ps The percentage voltage regulation The transmission efficiency Given that Ds for the Rook conductor is 0.0327...
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