In a 39KV overhead line, there are 3 units in the string of insulators. If the capacitance between each insulator to pin and earth is 20% of self-capacitance of each insulator. Find the distribution of voltage over three insulators and string efficiency

In a 39KV overhead line, there are 3 units in the string of insulators. If the capacitance between each insulator to pin and earth is 20% of self-capacitance of each insulator. Find the distribution of voltage over three insulators and string efficiency

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter10: Using Wire Tables And Determining Conductor Sizes

Section: Chapter Questions

Problem 10PP: Determine the ohms-per-mil-foot of an aluminum conductor located in an area with a temperature of...

See similar textbooks

Related questions

Q: What is the unit of measurement for the strength of a capacitor? Select one: A. MICROWATT B.…

A: The SI unit to measure the capacitance of capacitor is farad. The term micro is used to denote the…

Q: Which of the following cannot be said for Channel capacitance? a) All b) it is formed as a result…

Q: In a 33 kV overhead line, there are three units in the string of Example 1. insulators. If the…

Q: An aluminum wire has resistance of 80 ohms at 30 degree Celsius. And determine its resistance when…

Q: electrical circuit contains a capacitor of 11.24 microfarads and a resistor of 1124 ohms. If the…

A: The solution is given below

Q: The work done by the force F = 4ax - 3ay + 2az N in giving a 1nC charge a displacement of 10ax + 2ay…

A: The solution is given below

Q: Questions: 1. How does the area of the alumirum foil affect the capact ance if the paper capacit or?…

A: C=ξAdThus C∝A So, if area of aluminum is increased then capacitance will also increase.

Q: The amount of charge in coulombs passing through a conductor is given by q=7²+4t-exp(t) with tin s.…

A: We know current is the derivation of charge , so we will calculate current by derivation of given…

Q: Air Density of environment with 76mm Hg pressure and 45 degree temperature?: a. 0.9445 b. 0.9545 c.…

A: What is air density ? Choose the correct option

Q: A pure Ge sample is given at room temperature. Compute the increment in conductivity per degree rise…

A: The solution is given below

Q: 2- An electric current in a conductor varies with time acording to the expression t- sin where lisin…

A: According to the question we have to find, Charge-time graph related to given current.

Q: A string of three insulators has a self capacitance of 10 times its pin-to-earth capacitance. Then…

Q: Which of the following ratings (PIV- Peak Inverse Voltage and temperature) is true? Si diodes have…

A: Correct option is Ge diodes have lower PIV and smaller temperature ranges than Si diodes

Q: A 22kV, 50 Hz overhead transmission line connects Ibra and Muscat. There are three units in a string…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: What is dimensional formula of conductivity ,it's unit and answer in well manner step wise and also…

A: The dimensional formula for conductivity is derived as given below, P=i2R P=i2ρlA On rearranging,…

Q: Q': choice the correct answer in each of the following 1. With rise in temperature the electrical…

A: As per Bartleby guidelines we are allowed to solve only three subparts,please ask the rest again.

Q: (i) In a 39KV overhead line, there are 3 units in the string of insulators. If the capacitance…

A: I HAVE EXPLAINED IN DETAIL

Q: Provide an analysis (for example graphs and explanation) of the differences between circular loops…

A: When current flows through a conductor, it creates a magnetic field around the conductor any change…

Q: 1. Pure germanium has (4 × 104) atom. cm doped by indium atoms, the impurity is add to the extent of…

A: Given that intrinsic concentration of Ge is 2.5*1013 cm-3. ni==2.5*1019 m-3. The mobility of…

Q: B) The permittivity of a solid insulator is 75 and loss angle is 1 degree. If the insulator is…

A: According to question:

Q: It is required to grade a string having seven suspension insulators. If the pin to earth capacitance…

Q: (i) In a 36KV overhead line, there are 3 units in the string of insulators. If the capacitance…

A: I HAVE EXPLAINED IN DETAIL

Q: Example 8.10. The self capacitance of each unit in a string of three suspension insulators is C. The…

Q: 2. Identify the location and summarize the purpose of each of the following: а. Piezoelectric…

A: Here it is asked to identify the location and the purpose of each of the given elements. So weed to…

Q: the resistivity of a conductor ranges in giga ohm Select the correct response: O True O False

Q: Find the capacitance (in pF) of parallel-plate capacitor containing two dielectrics with er1 = 2 and…

A: Given parameters, In parallel plate capacitor

Q: Give the energy band description of conductors, semiconductors, and insulators.

Q: Find the concentration of electrons & holes in (a) N-type Si at 300K, if the conductivity is…

Q: Q1:Elecrron density varation wirh x axis as 1030 + 2x+ 4x².Find the difution curren at (x= 0.5) and…

Q: Each of the three insulators forming a string has a self capacitance of C farad. The shunt…

A: A schematic diagram for the insulators forming a string is given below:

Q: A solid substance which has electrical conductivity between that of an insulator and Semiconductor…

A: find explanation below

Q: Determine the electrical conductor materials from strongest to smallest below, silver (Ag), lithium…

A: Elemental semiconductors are the semiconductors with only single type of atoms. They constitute of…

Q: A string of 4 insulators has pin-to-earth equal to 0.2 of self-capacitance. Calcu (i) the voltage…

A: In this question we will find voltage distribution across insulator units....

Q: Find the concentration of electrons & holes in (a) N-type Si at 300K, if the conductivity is…

A: In a doped semiconductor bar, the electron and hole concentrations are not equal. The concentration…

Q: QIU Form graph shown below. Drive the energy as a function of time. If the resistance 10ka Charge )…

A: The graph given is shown below: R=10kΩ

Q: Which among these will not affect the value of the Capacitance? A. Insulation Covering of the Device…

A: Given: Here they are interested to know the variation of parallel plate capacitor. Parallel…

Q: A piece of parallel wire line has a nominal capacitance of 31.5 F/ m, and 9 H inductance per meter.…

A: we need to determine distance between two parallel wire lines in milimeter.

Q: a) In an experiment using a copper made conductor, the resistance of the conductor which has a…

A: Write the given values in the question.

Q: 3. What is the period in milliseconds for a given voltage having an equation of vit) = 100sin3771?

Q: What we are mean by the string efficiency and what you think its value for three insulator string if…

A: The power system has to transmit power from the generation side to the load side. For this purpose,…

Q: 2. If the surface-leakage current is 2nA for a reverse voltage of 25V, what is the surface-leakage…

Q: Construct and evaluate a graph to represent the recurrence of discharges in dielectric materials…

A: recurrence of discharges in dielectric materials before break down

Q: 5. A string of 4 insulators has self-capacitance equal to 4 times the pin-to-earth capacitance.…

Q: 2. When a current of 1A flows through a wire, the drift velocity of the electrons is 0.9 mm/s. What…

Q: In the Chapman-Enksog predictive model of conductivity of gases, increasing the temperature from 300…

A: Chapman–Enksog theory's core ideas may be applied to a wide range of physical models, including gas…

Q: In a 33kV overhead line, there are three units in a string of insulators. If the capacitance between…

Q: 6. A string of four suspension insulators is connec unit is equal to 5 times pin to earth…

Q: Calculate the capacitance of the remaining discs, (b) If the voltages of units one and two are 60%…

A: We have to calculate the capacitance of the remaining discs, and If the voltages of units one and…

Concept explainers

Capacitor

The capacitor is an element used to store electrical energy in the electrical field. A capacitor is a form of passive energy.

Question

26/a

(i) In a 39KV overhead line, there are 3 units in the string of insulators. If the capacitance between each insulator to pin and earth is 20% of self-capacitance of each insulator. Find the distribution of voltage over three insulators and string efficiency

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step by step

Solved in 2 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.

Similar questions

How many valence electrons are generally contained in materials used for insulators?
What is a proton? Where does it normally exist in an atom, and what is its charge?
A string of 8 suspension insulators is to be fitted with a grading ring. If the pin to earth capacitances are all equal to C, find the values of line to pin capacitances that would give a uniform voltage distribution over the string.
A string of three insulators has a self capacitance of 10 times its pin-to-earth capacitance. Then (1) find the voltage distribution across each unit as a percentage of the total voltage of the string and (2) find the string efficiency.
Q2/B: A grading string of four insulators has a uniform voltage across each disc. The capacitance of each pin to earth is C. The capacitance of the top unit is 5 C as shown.(a) Calculate the capacitance of the remaining discs, (b) If the voltages of units one and two are 60% and 40% of line voltage.,Calculate other voltages and string efficiency.
Write the solution
It is required to grade a string having seven suspension insulators. If the pin to earth capacitance are all equal to C, determine the line to pin capacitance that would give the same voltage across each insulator (C1, C2, …….C6) of the string.
The resistance of copper wire with alpha = 0.00393/Co at 20oC is 129 Ω. At 78 oC, its resistance would be about ___.
Permittivity characterizes the tendency of the Atomic Charge in an insulating material to distort in the presence of an Electric Field. Select one: True False
A copper wire at 20 degrees C, and 164 cmil, has a K value of 10.4 ohms per mi-foot. If the distance to the load is 600 feet (183 m) calculate the resistance of the loop.
A string of 4 insulators has self-capacitance equal to 4 times the pin to earthcapacitance. Calculate the voltage distribution across various units as apercentage of total voltage across the string and string efficiency.
Solve for the value of the capacitance (in nF unit) if R2 = 1057 ohms and Xc = 2365 ohms.