Electrical distribution in a hospital

Distribution system is one of the greatest industrial systems in the world With the progress of human civilization, there has been a rapid increase in the production and use of electrical energy No one can deny the foremost importance of the electrical energy in our life. Nowadays, we can say that the industry depends mainly on electrical energy Besides, it is the main source of energy for lighting and all other machines that people need in their different activities. When designing a commercial power system, special studies, Experiences & Know agent's must be comprised to evaluate the best performance of the system either at present or at future. A lot of terms should be taken into consideration to achieve the desired goals of constructing such a system. These terms may comprise safety, reliability, adequate cost, high performance & ease of maintenance. The main advantages of the electrical energy are the simplicity in transmission and easiness in conversion to any other form of energy, for example: light, heat, motion.. etc. L1. Electric power system includes: -Generation stations -Transmission system. -Distribution system. We are concerned in our project with the distribution system. The distribution system included Primary Distribution System, which transmits the power from the distribution substations to the distribution transformers and Secondary Distribution System, which transmits the power from the distribution transformers to the consumers. And as we know that when the electric energy flows in a conductor it suffers from voltage drop (A) and power losses ( / L ) where ( sr - IR and Pau : PR so we have to decrease the disadvantages, but in the same time we want to transmit a large power (P) where Pal so the only solution is to increase the voltage. and so we have to decrease the current to limit theseMohamed Ezza