## 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 occurring in it. Even though the three phase faults are quite rare, it imposes the most severe duty on the circuit breaker. Hence for any … Read more

## 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?

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.

## 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 the power line. The reason is nothing other than its length and operating conditions. It is highly affected by the weather conditions and other atmospheric … Read more

## 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 rate. The burning of fossil fuels produces harmful gases such as nitrous oxide, carbon monoxide, sulphur-di-oxide etc and pollutes the environment. The comparison of various … Read more

## Operation of generators

The generator is a device which converts the mechanical energy into electrical energy.

## Construction

In order to understand the operation of a simple generator, consider rectangular coil ABCD placed in a magnetic field as shown in the figure. The two ends of the coil are connected to the two copper half rings (or split rings) R1 and R2 called commutator. There are two carbon brushes B1 and B2 which press lightly against the two half rings.