All the devices chosen for this grid are suitable, this is because the rated voltage is less than the circuit breaker and the rated current rated grid is less than the rated current of circuit breakers. The short circuit current is also less than the current breaking capacity of circuit breakers. This thesis discusses the distribution of electrical energy, how it is transmitted from generating power plants to consumers, how it is distributed and the calculation of the given grid. I overviewed the switchgears of electrical grid and the calculation of rated and short circuit current on the grid.