ABSTRACT
Electric energy is the main energy and dynamism of modern industry production。With development and progress of modern civilization，social production and is it put forward high request more aud more to quality and management that electric energy supply to live。The system nucleus of factory supplies power is transformer。It is very important to design and designs including：Calculation of load and compensation of the inactive power；Transformer substation main voltage transformer platform count and capacity，sureness of pattern；Mainly wire the choice of the scheme in the transformer substation；Pass in and out the choice of the thread；Choice of shorting out and calculating and switchgear；Two return circuit sureness and choice that relay protect of scheme exactly make；Defend the thunder and protect the design with the earth device；The workshop distribution line connects up the sureness of the scheme；Circuit wire and distribution equipment and protecting the choice of the sheme；Circuit wire and distribution equipment and protecting the choice of the of equipment；And the electic design that lighted，there is drawing of ciruit diagram。
Keyword：Electric energy Substation Transformer Tnterruptor The design with the earth device
