Why the power system is divided into several protections zones?
Continue Reading
Why the power system is divided into several protections zones?
What are the essential components of a protective relay?
What are the essential components of a protective relay? The essential components of a protective relay are the following: 1. Sensing element. 2. Comparison element. 3. Control element Related…
Continue Reading
What are the essential components of a protective relay?
What are the main functions of a protection relay?
What are the main functions of a protection relay? The main functions of a protective relay are the following: · Detection of the presence of a fault. · Detection of…
Continue Reading
What are the main functions of a protection relay?
What is a protection relay?
What is a protection relay? Protection relay is an electrical device used to sense an abnormal condition in a power system and operate a circuit breaker…
Continue Reading
What is a protection relay?
Which is the most efficient electrical machine?
The most efficient electrical machine is the transformer. Transformers have efficiency above 95%. The autotransformer has an efficiency of close to 98%. The maximum efficiency is achieved under the fully…
Continue Reading
Which is the most efficient electrical machine?
How rating of a circuit breaker for a system is determined?
How rating of a circuit breaker for a system is determined? The rating of a circuit breaker for a system is determined based on the balanced three phase fault…
Continue Reading
How rating of a circuit breaker for a system is determined?
Which is the most common fault occuring in the power system?
The most common fault occurring in the power system is a Single line to ground fault. Almost 70 per cent of faults occurring is Single line to ground faults.
Continue Reading
Which is the most common fault occuring in the power system?
What are the different faults occurring in the overhead transmission lines?
What are the different faults occurring in the overhead transmission lines?
1. Single line to ground fault.
2. Line to line fault.
3. Double line to ground fault.
4. Line to line to line fault (Three phases are short-circuited)
5. Three line to ground fault. (more…)
Continue Reading
What are the different faults occurring in the overhead transmission lines?
On which part of the power system, the occurrence of failure / abnormal condition is more?
On which part of the power system the occurrence of failure / abnormal condition is more? The probability of occurrence of failure / abnormal condition is more in the on…
Continue Reading
On which part of the power system, the occurrence of failure / abnormal condition is more?
What is a short circuit?
A short circuit is a situation in which two or more different lines (having different voltage levels/ different phase/ different terminals) come in contact and finally leads to the flow…
Continue Reading
What is a short circuit?
