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One among the following is the top most conductors in high voltage transmission lines, identify it.
  • a)
    R- phase conductor
  • b)
    Y- phase conductor
  • c)
    B- phase conductor
  • d)
    Earth conductor 
Correct answer is option 'D'. Can you explain this answer?
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One among the following is the top most conductors in high voltage tra...
A guard wire or earth wire is the top most conductors in high voltage transmission lines. It is used mainly to protect lines from lightning. If in case lightning struck then it carries the excessive current inrush to ground.
Its radius is much smaller than the actual transmission wire because as the resistance is inversely proportional to area of cross section and as the cross section decreases, the resistance increases. The increased resistance of earth wire is able to withstand high inrush of current caused due to lightning and it will safely guide this inrush into ground.
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One among the following is the top most conductors in high voltage tra...
Understanding High Voltage Transmission Lines
High voltage transmission lines are essential for efficiently transporting electricity over long distances. Among the various conductors used in these systems, the earth conductor plays a unique and crucial role.
Role of Conductors
- R-phase, Y-phase, B-phase Conductors: These are the three-phase conductors that carry the electrical load. They are responsible for transmitting power from the generation point to the distribution network.
- Earth Conductor: This conductor, often referred to as the ground wire, serves multiple functions, including safety and stability in the transmission system.
Why Earth Conductor is the Topmost Conductor
- Safety Mechanism: The earth conductor is vital for protecting both equipment and personnel. It provides a path for fault currents, preventing electric shock and ensuring system integrity during faults.
- Lightning Protection: It acts as a lightning rod, allowing lightning strikes to safely dissipate into the ground, reducing the risk of damage to the overhead conductors.
- Voltage Stabilization: The earth conductor helps maintain voltage levels in the system, ensuring a balanced load across the phases.
- Regulatory Compliance: Many electrical codes require the installation of earth conductors to enhance safety in high voltage systems.
Conclusion
In summary, while R-phase, Y-phase, and B-phase conductors are essential for power transmission, the earth conductor holds the top position due to its critical safety and protective functions. Understanding these roles is crucial for effective electrical engineering and safe transmission practices.
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it depends on the length of the conductor the capacitance of the line is proportional to the length of the transmission line their effect is negligible on the performance of short having a length less than 80 km and low voltage transmission accidents of the transmission line along with the conductances forms the shunted mittens the conductance and the transmission line is because of the leakage over the surface of the conductor considered a line consisting of two conductors and be each of radius are the distance between the conductors being Des shown in the diagram below minus the potential difference between the conductors and via's work QA charge on conductor QB charge on conductor vvab pencil difference between conductor and the Epsilon minus absolute primitivity QA plus QV = 0 so that QA equals QB - equals DBA equals data equals DB equals our substituting these values and voltage equation we get the capacitance between the conductors is cab is referred to as lying to line capacitance if the two conductors are in VR oppositely charge then the potential difference between them is zero then the potential of each conductor is given by one half bath the capacitance between each conductor and point of zero potential and is capacitive CN is called the capacitance to neut or capacitance to ground capacitance cab is the combination of two equal capacity and VN series thus capacitance to neutral is twice the capacitance between the conductors IE CN equals to Cave the absolute primitivity Epsilon is given by Epsilon equals epsilono Epsilon are where epsilano is the permittivity of the free space and Epsilon or is the relative primitivity of the medium prayer capacitance reactants between one conductor and neutral capacitance of the symmetrical three phase line let a balanced system of voltage be applied to a symmetrical three-phase line shown below the phasor diagram of the three phase line with equilateral spacing is shown below take the voltage of conductor to neutral as a reference phaser the potential difference between conductor and we can be written the similarly potential difference between conductors and sea is on adding equations one and two we get also combining equation three and four from equation 6 and 7 the line to neutral capacitance the capacitance of symmetrical three phase line is same as that of the two wire line Related: Capacitance of Transmission Lines?

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One among the following is the top most conductors in high voltage transmission lines, identify it.a)R- phase conductorb)Y- phase conductorc)B- phase conductord)Earth conductorCorrect answer is option 'D'. Can you explain this answer?
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