🔍
A 3-ph overhead line supported by 6 disc insulators, the potential across the unit is 11 KV. Assuming shunt capacitance between each Insulator and each metal link is of 1/5th of capacitance of insulator. Calculate:
0 like 0 dislike

Related questions

A 3 phase line of 4 km length delivers 4000 kW at a p.f of 0.8 lagging to a load the resistance and reactance per km of each conductor are 0.2 Ω and 0.5 Ω respectively if the voltage at the supply end is maintained at 11 kV. Calculate the received end voltage and efficiency of line.
Answer : Let's break down the problem step by step and calculate the received end voltage and the efficiency of the line. ### Given Data: - Power delivered to the load, \( P = 4000 \, \text{kW} \) - Power factor, \( \text{p. ... voltage**: \( 10.43 \, \text{kV} \) - **Efficiency of the line**: \( 98.61\% \)...

View solution
0 like 0 dislike
5 views 1 answer
× Full Screen Image

Find the capacitance between the conductors of a single phase 10 Km long line. The diameter of each conductor is 1.213cm. The spacing between the conductors is 1.25m

View solution
0 like 0 dislike
2 views 0 answers
× Full Screen Image

A three-phase transformer having a line voltage ratio of 0.4 kV/11kV is connected Star/Delta and protective transformers on the 0.4 kV side have a current ratio of 500/5. Calculate the ratio of ... on the 11 kV side. Draw a neat circuit diagram and indicate the given values at appropriate places.

View solution
0 like 0 dislike
3 views 0 answers
× Full Screen Image

Derive equation for string efficiency with 3 - disc insulators of suspension type.

View solution
0 like 0 dislike
2 views 0 answers
× Full Screen Image
0 like 0 dislike
4 views 0 answers
× Full Screen Image

A 3 φ I.M. has synchronous speed of 250rpm and 4% slip at full load. The rotor has a resistance of 0.02Ω/ph and stand still reactance of 0.15Ω/ph. Calculate i) The speed at which max torque is developed. ii) The ratio of maximum to F. L. torque. iii) The ratio of maximum to starting torque.

View solution
0 like 0 dislike
5 views 0 answers
× Full Screen Image

A uniform illumination of 150 lux is to be obtained on the floor of a room measuring 15m x 15m by arranging electric lights suitably. Calculate the number of lamps and wattage of each ... lamp efficiency is 20 lumens/watt. Assume and write suitable values of constants required for this calculation.

View solution
0 like 0 dislike
2 views 0 answers
× Full Screen Image

Draw the single line diagram (layout) of 33/11 kV substation.

View solution
0 like 0 dislike
2 views 0 answers
× Full Screen Image
0 like 0 dislike
5 views 0 answers
× Full Screen Image

What is the difference between shunt reactor and line or bus reactor?

View solution
0 like 0 dislike
2 views 0 answers
× Full Screen Image
0 like 0 dislike
5 views 0 answers
× Full Screen Image

Rectifier: Line commutated 1 phase and 3 phase half (semi) & fully controlled bridge converters

View solution
0 like 0 dislike
2 views 0 answers
× Full Screen Image
0 like 0 dislike
3 views 0 answers
× Full Screen Image

Is there a link between ED and PE?
Answer : Yes, there is a connection between **Erectile Dysfunction (ED)** and **Premature Ejaculation (PE)**, though they are distinct conditions. However, they can sometimes occur together, and ... , addressing the root causes with a healthcare professional can help manage or even resolve both conditions....

View solution
0 like 0 dislike
5 views 1 answer
× Full Screen Image
0 like 0 dislike
3 views 0 answers
× Full Screen Image
0 like 0 dislike
4 views 0 answers
× Full Screen Image
0 like 0 dislike
2 views 0 answers
× Full Screen Image

A workshop measures 10m × 25m. The shop is illuminated by 24 lamps of 200 watts each. The lumen efficiency of each lamp is 15 lumens per watt. Depreciation factor is assumed to be 0.8 and a coefficient of utilization 0.5. Determine the illumination on the working plane.

View solution
0 like 0 dislike
4 views 0 answers
× Full Screen Image

Under what condition the terminal potential difference across a battery and it's emf are equal?
Answer : The terminal potential difference across a battery and its EMF are equal under the condition **when there is no current flowing through the battery**. This happens when the battery is **open- ... will be less than the EMF due to the voltage drop across the internal resistance of the battery....

View solution
0 like 0 dislike
8 views 1 answer
× Full Screen Image

Under what condition the terminal potential difference across a battery and emf are equal?

View solution
0 like 0 dislike
11 views 0 answers
× Full Screen Image

Under which condition the terminal potential difference across a battery and its emf are equal?

View solution
0 like 0 dislike
3 views 0 answers
× Full Screen Image

State the relationship between line voltage & phase voltage and line current & phase current in a 3-phase star connected system.
Answer : In a 3-phase star (wye) connected system, the relationship between line voltage, phase voltage, line current, and phase current can be summarized as follows: ### 1. **Line Voltage and ... and currents behave in a 3-phase system, especially when configuring systems for different types of loads....

View solution
0 like 0 dislike
9 views 1 answer
× Full Screen Image

State the relationship between line voltage & phase voltage and line current & phase current in a 3-phase delta connected system.

View solution
0 like 0 dislike
3 views 0 answers
× Full Screen Image

Is 11 kV HV or LV?
Answer : 11 kV (kilovolts) is considered High Voltage (HV). In electrical systems, the classification of voltage levels can vary slightly depending on the region, but typically: - Low ... considered high voltage in many contexts, particularly when dealing with industrial or power distribution systems....

View solution
0 like 0 dislike
5 views 1 answer
× Full Screen Image

Why only 11 kV?
Answer : The choice of 11 kV (kilovolts) for distribution systems is common in many countries, but it's not a strict rule. It's generally selected for several reasons: 1. **Efficiency in Power Transmission**: Higher ... 12 kV, or 15 kV), but 11 kV has become a widely accepted standard for many power grids....

View solution
0 like 0 dislike
3 views 1 answer
× Full Screen Image

How do you select an insulator for a transmission line?

View solution
0 like 0 dislike
4 views 0 answers
× Full Screen Image

Why 3-phase, why not 6 or 12?
Answer : Great question! The reason why 3-phase power is commonly used instead of 6 or 12-phase comes down to a few practical and engineering factors: ### 1. **Efficiency**: ... . Increasing the number of phases adds complexity without offering significant practical benefits for most common applications....

View solution
0 like 0 dislike
5 views 1 answer
× Full Screen Image

What is the difference between a conductor and an insulator?

View solution
0 like 0 dislike
4 views 0 answers
× Full Screen Image

What is the difference between a conductor, semiconductor, and insulator?
Answer : Great question! Here's a simple breakdown of the three: ### 1. **Conductor** - **What it is**: A material that allows electricity to flow through it easily. - **Why?**: Conductors have free ... ** = Hardly any flow of electricity (e.g., rubber, plastic). Does that help clarify the differences?...

View solution
0 like 0 dislike
11 views 1 answer
× Full Screen Image

What are the types of overhead transmission line conductors?

View solution
0 like 0 dislike
2 views 0 answers
× Full Screen Image

What is the classification of overhead transmission line?

View solution
0 like 0 dislike
3 views 0 answers
× Full Screen Image
0 like 0 dislike
2 views 0 answers
× Full Screen Image

List the properties of line insulators in brief.
Answer : Line insulators are essential components in electrical transmission and distribution systems. Here are their key properties: 1. **Electrical Insulation**: They prevent the flow of ... line insulators effectively isolate the conductors, allowing for safe and efficient electrical power transmission....

View solution
0 like 0 dislike
6 views 1 answer
× Full Screen Image

Describe with a suitable diagram speed control of a d.c shunt motor by field current control method.

View solution
0 like 0 dislike
4 views 0 answers
× Full Screen Image

Is the potential difference across the terminals of a battery always less than its emf?

View solution
0 like 0 dislike
2 views 0 answers
× Full Screen Image

Is the potential difference across the terminals of a battery always less than the emf of the battery?
Answer : No, the potential difference across the terminals of a battery is not always less than its EMF (electromotive force). The relationship depends on whether there is any current flowing through the battery or ... , and less than the EMF when current flows due to the internal resistance of the battery....

View solution
0 like 0 dislike
6 views 1 answer
× Full Screen Image

Can potential difference across terminals of a battery be greater than its emf?

View solution
0 like 0 dislike
5 views 0 answers
× Full Screen Image

Is potential difference across the terminals of a battery always less than the emf of the battery?

View solution
0 like 0 dislike
3 views 0 answers
× Full Screen Image

Why the potential difference across the terminals of a cell is less than its emf when a current is drawn from it?

View solution
0 like 0 dislike
1 view 0 answers
× Full Screen Image

Can potential difference across the terminals of a battery be greater than its emf?

View solution
0 like 0 dislike
5 views 0 answers
× Full Screen Image

What is the difference between suspension and tension insulator strings?
Answer : The main difference between **suspension insulator strings** and **tension insulator strings** lies in their purpose, construction, and where they are used in power transmission systems. Here's a breakdown: ... are used where the line experiences tension forces, such as at the line's end or corners....

View solution
0 like 0 dislike
3 views 1 answer
× Full Screen Image

What is the difference between overhead and underground transmission lines?

View solution
0 like 0 dislike
3 views 0 answers
× Full Screen Image

Differentiate between overhead transmission and underground transmission.

View solution
0 like 0 dislike
5 views 0 answers
× Full Screen Image

What is the difference between conductors and insulators?

View solution
0 like 0 dislike
4 views 0 answers
× Full Screen Image

What is the difference between electrical conductors and insulators?

View solution
0 like 0 dislike
2 views 0 answers
× Full Screen Image
0 like 0 dislike
3 views 0 answers
× Full Screen Image

Is the potential difference across the terminal of the battery always less than the emf?

View solution
0 like 0 dislike
5 views 0 answers
× Full Screen Image

Can the potential difference across the terminals of the battery be equal to its emf?

View solution
0 like 0 dislike
3 views 0 answers
× Full Screen Image
0 like 0 dislike
2 views 0 answers
× Full Screen Image
0 like 0 dislike
3 views 0 answers
× Full Screen Image
Learn Electrical Engineering the easy way at Electrical-Engineering.app – tutorials, tools, calculators, and video lessons for students, professionals, and beginners.

Subjects

29.4k questions

9.2k answers

7.9k users