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…
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…
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…
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.
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…)
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…
Comparision of conventional energy resources
Conventional energy is obtained from the conventional energy resources such as coal, diesel, gas and nucleus. These are non-renewable resources and may exhaust in few decades if consumed at the current…
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